Merge branch 'i2c/for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:

 - mostly driver updates. Bigger ones for mlxcpld and iproc. But most of
   them are all over the place.

 - removal of the efm32, sirf, u300, and zte zx bus drivers because of
   platform removal. So, we have a pleasant diffstat this time.

 - first set of cleanups in the I2C core as preparation to increase
   maximum length of SMBus transfers to 255 (as specified in the new
   standard). Better documentation of struct i2c_msg and its flags stand
   out here.

 - the testunit can now respond to SMBus block process calls which is
   the testcase when implementing the above new maximum length.

* 'i2c/for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (62 commits)
  i2c: remove redundant error print in stm32f7_i2c_probe
  i2c: testunit: add support for block process calls
  i2c: busses: Replace spin_lock_irqsave with spin_lock in hard IRQ
  dt-bindings: eeprom: at24: Document ROHM BR24G01
  i2c: i801: Add support for Intel Alder Lake PCH-P
  i2c: mv64xxx: Fix check for missing clock after adding RPM
  i2c: mux: mlxcpld: Add callback to notify mux creation completion
  i2c: mux: mlxcpld: Extend supported mux number
  i2c: mux: mlxcpld: Extend driver to support word address space devices
  i2c: mux: mlxcpld: Get rid of adapter numbers enforcement
  i2c: mux: mlxcpld: Prepare mux selection infrastructure for two-byte support
  i2c: mux: mlxcpld: Convert driver to platform driver
  i2c: imx: Synthesize end of transaction events without idle interrupts
  i2c: i2c-qcom-geni: Add shutdown callback for i2c
  i2c: mv64xxx: Add runtime PM support
  i2c: amd-mp2: Remove unused macro
  i2c: amd-mp2: convert to PCI logging functions
  i2c: mux: mlxcpld: Move header file out of x86 realm
  platform/x86: mlxcpld: Update module license
  i2c: mux: mlxcpld: Update module license
  ...

Documentation/devicetree/bindings/eeprom/at24.yaml

@@ -95,9 +95,6 @@ properties:
                   pattern: spd$
       # These are special cases that don't conform to the above pattern.
       # Each requires a standard at24 model as fallback.
-      - items:
-          - const: rohm,br24t01
-          - const: atmel,24c01
       - items:
           - const: nxp,se97b
           - const: atmel,24c02
@@ -113,6 +110,12 @@ properties:
       - items:
           - const: renesas,r1ex24128
           - const: atmel,24c128
+      - items:
+          - const: rohm,br24g01
+          - const: atmel,24c01
+      - items:
+          - const: rohm,br24t01
+          - const: atmel,24c01
 
   label:
     description: Descriptive name of the EEPROM.

Documentation/devicetree/bindings/i2c/i2c-sirf.txt

-I2C for SiRFprimaII platforms
-
-Required properties :
-- compatible : Must be "sirf,prima2-i2c"
-- reg: physical base address of the controller and length of memory mapped
-     region.
-- interrupts: interrupt number to the cpu.
-
-Optional properties:
-- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
-  The absence of the property indicates the default frequency 100 kHz.
-
-Examples :
-
-i2c0: i2c@b00e0000 {
-    compatible = "sirf,prima2-i2c";
-    reg = <0xb00e0000 0x10000>;
-    interrupts = <24>;
-};

Documentation/devicetree/bindings/i2c/i2c-stu300.txt

-ST Microelectronics DDC I2C
-
-Required properties :
-- compatible : Must be "st,ddci2c"
-- reg: physical base address of the controller and length of memory mapped
-     region.
-- interrupts: interrupt number to the cpu.
-- #address-cells = <1>;
-- #size-cells = <0>;
-
-Optional properties:
-- Child nodes conforming to i2c bus binding
-
-Examples :
-

Documentation/devicetree/bindings/i2c/i2c-zx2967.txt

-ZTE zx2967 I2C controller
-
-Required properties:
- - compatible: must be "zte,zx296718-i2c"
- - reg: physical address and length of the device registers
- - interrupts: a single interrupt specifier
- - clocks: clock for the device
- - #address-cells: should be <1>
- - #size-cells: should be <0>
- - clock-frequency: the desired I2C bus clock frequency.
-
-Examples:
-
-	i2c@112000 {
-		compatible = "zte,zx296718-i2c";
-		reg = <0x00112000 0x1000>;
-		interrupts = <GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&osc24m>;
-		#address-cells = <1>
-		#size-cells = <0>;
-		clock-frequency = <1600000>;
-	};

Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml

@@ -18,21 +18,14 @@ properties:
           - const: allwinner,sun4i-a10-i2c
       - const: allwinner,sun6i-a31-i2c
       - items:
-          - const: allwinner,sun8i-a23-i2c
+          - enum:
+              - allwinner,sun8i-a23-i2c
+              - allwinner,sun8i-a83t-i2c
+              - allwinner,sun50i-a64-i2c
+              - allwinner,sun50i-a100-i2c
+              - allwinner,sun50i-h6-i2c
+              - allwinner,sun50i-h616-i2c
           - const: allwinner,sun6i-a31-i2c
-      - items:
-          - const: allwinner,sun8i-a83t-i2c
-          - const: allwinner,sun6i-a31-i2c
-      - items:
-          - const: allwinner,sun50i-a64-i2c
-          - const: allwinner,sun6i-a31-i2c
-      - items:
-          - const: allwinner,sun50i-a100-i2c
-          - const: allwinner,sun6i-a31-i2c
-      - items:
-          - const: allwinner,sun50i-h6-i2c
-          - const: allwinner,sun6i-a31-i2c
-
       - const: marvell,mv64xxx-i2c
       - const: marvell,mv78230-i2c
       - const: marvell,mv78230-a0-i2c

Documentation/devicetree/bindings/i2c/renesas,i2c.txt

@@ -26,6 +26,7 @@ Required properties:
 	"renesas,i2c-r8a77980" if the device is a part of a R8A77980 SoC.
 	"renesas,i2c-r8a77990" if the device is a part of a R8A77990 SoC.
 	"renesas,i2c-r8a77995" if the device is a part of a R8A77995 SoC.
+	"renesas,i2c-r8a779a0" if the device is a part of a R8A779A0 SoC.
 	"renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device.
 	"renesas,rcar-gen2-i2c" for a generic R-Car Gen2 or RZ/G1 compatible
 				device.

Documentation/i2c/slave-testunit-backend.rst

@@ -22,8 +22,9 @@ Instantiating the device is regular. Example for bus 0, address 0x30:
 
 After that, you will have a write-only device listening. Reads will just return
 an 8-bit version number of the testunit. When writing, the device consists of 4
-8-bit registers and all must be written to start a testcase, i.e. you must
-always write 4 bytes to the device. The registers are:
+8-bit registers and, except for some "partial" commands, all registers must be
+written to start a testcase, i.e. you usually write 4 bytes to the device. The
+registers are:
 
 0x00 CMD   - which test to trigger
 0x01 DATAL - configuration byte 1 for the test
@@ -67,3 +68,21 @@ status word is currently ignored in the Linux Kernel. Example to send a
 notification after 10ms:
 
 # i2cset -y 0 0x30 0x02 0x42 0x64 0x01 i
+
+0x03 SMBUS_BLOCK_PROC_CALL (partial command)
+   DATAL - must be '1', i.e. one further byte will be written
+   DATAH - number of bytes to be sent back
+   DELAY - not applicable, partial command!
+
+This test will respond to a block process call as defined by the SMBus
+specification. The one data byte written specifies how many bytes will be sent
+back in the following read transfer. Note that in this read transfer, the
+testunit will prefix the length of the bytes to follow. So, if your host bus
+driver emulates SMBus calls like the majority does, it needs to support the
+I2C_M_RECV_LEN flag of an i2c_msg. This is a good testcase for it. The returned
+data consists of the length first, and then of an array of bytes from length-1
+to 0. Here is an example which emulates i2c_smbus_block_process_call() using
+i2ctransfer (you need i2c-tools v4.2 or later):
+
+# i2ctransfer -y 0 w3@0x30 0x03 0x01 0x10 r?
+0x10 0x0f 0x0e 0x0d 0x0c 0x0b 0x0a 0x09 0x08 0x07 0x06 0x05 0x04 0x03 0x02 0x01 0x00

drivers/gpio/gpiolib.c

@@ -3469,6 +3469,10 @@ EXPORT_SYMBOL_GPL(gpiod_add_lookup_table);
  */
 void gpiod_remove_lookup_table(struct gpiod_lookup_table *table)
 {
+	/* Nothing to remove */
+	if (!table)
+		return;
+
 	mutex_lock(&gpio_lookup_lock);
 
 	list_del(&table->list);

drivers/i2c/algos/i2c-algo-bit.c

@@ -622,9 +622,7 @@ static int bit_xfer_atomic(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[],
 
 static u32 bit_func(struct i2c_adapter *adap)
 {
-	return I2C_FUNC_I2C | I2C_FUNC_NOSTART | I2C_FUNC_SMBUS_EMUL |
-	       I2C_FUNC_SMBUS_READ_BLOCK_DATA |
-	       I2C_FUNC_SMBUS_BLOCK_PROC_CALL |
+	return I2C_FUNC_I2C | I2C_FUNC_NOSTART | I2C_FUNC_SMBUS_EMUL_ALL |
 	       I2C_FUNC_10BIT_ADDR | I2C_FUNC_PROTOCOL_MANGLING;
 }
 

drivers/i2c/busses/Kconfig

@@ -586,13 +586,6 @@ config I2C_DIGICOLOR
 	  This driver can also be built as a module.  If so, the module
 	  will be called i2c-digicolor.
 
-config I2C_EFM32
-	tristate "EFM32 I2C controller"
-	depends on ARCH_EFM32 || COMPILE_TEST
-	help
-	  This driver supports the i2c block found in Energy Micro's EFM32
-	  SoCs.
-
 config I2C_EG20T
 	tristate "Intel EG20T PCH/LAPIS Semicon IOH(ML7213/ML7223/ML7831) I2C"
 	depends on PCI && (X86_32 || MIPS || COMPILE_TEST)
@@ -1000,16 +993,6 @@ config I2C_SIMTEC
 	  This driver can also be built as a module. If so, the module
 	  will be called i2c-simtec.
 
-config I2C_SIRF
-	tristate "CSR SiRFprimaII I2C interface"
-	depends on ARCH_SIRF || COMPILE_TEST
-	help
-	  If you say yes to this option, support will be included for the
-	  CSR SiRFprimaII I2C interface.
-
-	  This driver can also be built as a module.  If so, the module
-	  will be called i2c-sirf.
-
 config I2C_SPRD
 	tristate "Spreadtrum I2C interface"
 	depends on I2C=y && (ARCH_SPRD || COMPILE_TEST)
@@ -1050,19 +1033,6 @@ config I2C_STM32F7
 	  This driver can also be built as module. If so, the module
 	  will be called i2c-stm32f7.
 
-config I2C_STU300
-	tristate "ST Microelectronics DDC I2C interface"
-	depends on MACH_U300 || COMPILE_TEST
-	default y if MACH_U300
-	help
-	  If you say yes to this option, support will be included for the
-	  I2C interface from ST Microelectronics simply called "DDC I2C"
-	  supporting both I2C and DDC, used in e.g. the U300 series
-	  mobile platforms.
-
-	  This driver can also be built as a module. If so, the module
-	  will be called i2c-stu300.
-
 config I2C_SUN6I_P2WI
 	tristate "Allwinner sun6i internal P2WI controller"
 	depends on RESET_CONTROLLER
@@ -1401,15 +1371,6 @@ config I2C_OPAL
 	  This driver can also be built as a module. If so, the module will be
 	  called as i2c-opal.
 
-config I2C_ZX2967
-	tristate "ZTE ZX2967 I2C support"
-	depends on ARCH_ZX
-	default y
-	help
-	  Selecting this option will add ZX2967 I2C driver.
-	  This driver can also be built as a module. If so, the module will be
-	  called i2c-zx2967.
-
 config I2C_FSI
 	tristate "FSI I2C driver"
 	depends on FSI

drivers/i2c/busses/Makefile

@@ -58,7 +58,6 @@ i2c-designware-platform-$(CONFIG_I2C_DESIGNWARE_BAYTRAIL) += i2c-designware-bayt
 obj-$(CONFIG_I2C_DESIGNWARE_PCI)			+= i2c-designware-pci.o
 i2c-designware-pci-y					:= i2c-designware-pcidrv.o
 obj-$(CONFIG_I2C_DIGICOLOR)	+= i2c-digicolor.o
-obj-$(CONFIG_I2C_EFM32)		+= i2c-efm32.o
 obj-$(CONFIG_I2C_EG20T)		+= i2c-eg20t.o
 obj-$(CONFIG_I2C_EMEV2)		+= i2c-emev2.o
 obj-$(CONFIG_I2C_EXYNOS5)	+= i2c-exynos5.o
@@ -99,13 +98,11 @@ obj-$(CONFIG_I2C_S3C2410)	+= i2c-s3c2410.o
 obj-$(CONFIG_I2C_SH7760)	+= i2c-sh7760.o
 obj-$(CONFIG_I2C_SH_MOBILE)	+= i2c-sh_mobile.o
 obj-$(CONFIG_I2C_SIMTEC)	+= i2c-simtec.o
-obj-$(CONFIG_I2C_SIRF)		+= i2c-sirf.o
 obj-$(CONFIG_I2C_SPRD)		+= i2c-sprd.o
 obj-$(CONFIG_I2C_ST)		+= i2c-st.o
 obj-$(CONFIG_I2C_STM32F4)	+= i2c-stm32f4.o
 i2c-stm32f7-drv-objs := i2c-stm32f7.o i2c-stm32.o
 obj-$(CONFIG_I2C_STM32F7)	+= i2c-stm32f7-drv.o
-obj-$(CONFIG_I2C_STU300)	+= i2c-stu300.o
 obj-$(CONFIG_I2C_SUN6I_P2WI)	+= i2c-sun6i-p2wi.o
 obj-$(CONFIG_I2C_SYNQUACER)	+= i2c-synquacer.o
 obj-$(CONFIG_I2C_TEGRA)		+= i2c-tegra.o
@@ -122,7 +119,6 @@ obj-$(CONFIG_I2C_XILINX)	+= i2c-xiic.o
 obj-$(CONFIG_I2C_XLR)		+= i2c-xlr.o
 obj-$(CONFIG_I2C_XLP9XX)	+= i2c-xlp9xx.o
 obj-$(CONFIG_I2C_RCAR)		+= i2c-rcar.o
-obj-$(CONFIG_I2C_ZX2967)	+= i2c-zx2967.o
 
 # External I2C/SMBus adapter drivers
 obj-$(CONFIG_I2C_DIOLAN_U2C)	+= i2c-diolan-u2c.o

drivers/i2c/busses/i2c-amd-mp2-pci.c

@@ -30,7 +30,7 @@ static void amd_mp2_c2p_mutex_unlock(struct amd_i2c_common *i2c_common)
 	struct amd_mp2_dev *privdata = i2c_common->mp2_dev;
 
 	if (unlikely(privdata->c2p_lock_busid != i2c_common->bus_id)) {
-		dev_warn(ndev_dev(privdata),
+		pci_warn(privdata->pci_dev,
 			 "bus %d attempting to unlock C2P locked by bus %d\n",
 			 i2c_common->bus_id, privdata->c2p_lock_busid);
 		return;
@@ -59,8 +59,7 @@ int amd_mp2_bus_enable_set(struct amd_i2c_common *i2c_common, bool enable)
 	struct amd_mp2_dev *privdata = i2c_common->mp2_dev;
 	union i2c_cmd_base i2c_cmd_base;
 
-	dev_dbg(ndev_dev(privdata), "%s id: %d\n", __func__,
-		i2c_common->bus_id);
+	pci_dbg(privdata->pci_dev, "id: %d\n", i2c_common->bus_id);
 
 	i2c_cmd_base.ul = 0;
 	i2c_cmd_base.s.i2c_cmd = enable ? i2c_enable : i2c_disable;
@@ -111,20 +110,19 @@ EXPORT_SYMBOL_GPL(amd_mp2_rw);
 static void amd_mp2_pci_check_rw_event(struct amd_i2c_common *i2c_common)
 {
 	struct amd_mp2_dev *privdata = i2c_common->mp2_dev;
+	struct pci_dev *pdev = privdata->pci_dev;
 	int len = i2c_common->eventval.r.length;
 	u32 slave_addr = i2c_common->eventval.r.slave_addr;
 	bool err = false;
 
 	if (unlikely(len != i2c_common->msg->len)) {
-		dev_err(ndev_dev(privdata),
-			"length %d in event doesn't match buffer length %d!\n",
+		pci_err(pdev, "length %d in event doesn't match buffer length %d!\n",
 			len, i2c_common->msg->len);
 		err = true;
 	}
 
 	if (unlikely(slave_addr != i2c_common->msg->addr)) {
-		dev_err(ndev_dev(privdata),
-			"unexpected slave address %x (expected: %x)!\n",
+		pci_err(pdev, "unexpected slave address %x (expected: %x)!\n",
 			slave_addr, i2c_common->msg->addr);
 		err = true;
 	}
@@ -136,13 +134,14 @@ static void amd_mp2_pci_check_rw_event(struct amd_i2c_common *i2c_common)
 static void __amd_mp2_process_event(struct amd_i2c_common *i2c_common)
 {
 	struct amd_mp2_dev *privdata = i2c_common->mp2_dev;
+	struct pci_dev *pdev = privdata->pci_dev;
 	enum status_type sts = i2c_common->eventval.r.status;
 	enum response_type res = i2c_common->eventval.r.response;
 	int len = i2c_common->eventval.r.length;
 
 	if (res != command_success) {
 		if (res != command_failed)
-			dev_err(ndev_dev(privdata), "invalid response to i2c command!\n");
+			pci_err(pdev, "invalid response to i2c command!\n");
 		return;
 	}
 
@@ -155,32 +154,26 @@ static void __amd_mp2_process_event(struct amd_i2c_common *i2c_common)
 					      privdata->mmio + AMD_C2P_MSG2,
 					      len);
 		} else if (sts != i2c_readfail_event) {
-			dev_err(ndev_dev(privdata),
-				"invalid i2c status after read (%d)!\n", sts);
+			pci_err(pdev, "invalid i2c status after read (%d)!\n", sts);
 		}
 		break;
 	case i2c_write:
 		if (sts == i2c_writecomplete_event)
 			amd_mp2_pci_check_rw_event(i2c_common);
 		else if (sts != i2c_writefail_event)
-			dev_err(ndev_dev(privdata),
-				"invalid i2c status after write (%d)!\n", sts);
+			pci_err(pdev, "invalid i2c status after write (%d)!\n", sts);
 		break;
 	case i2c_enable:
 		if (sts == i2c_busenable_complete)
 			i2c_common->cmd_success = true;
 		else if (sts != i2c_busenable_failed)
-			dev_err(ndev_dev(privdata),
-				"invalid i2c status after bus enable (%d)!\n",
-				sts);
+			pci_err(pdev, "invalid i2c status after bus enable (%d)!\n", sts);
 		break;
 	case i2c_disable:
 		if (sts == i2c_busdisable_complete)
 			i2c_common->cmd_success = true;
 		else if (sts != i2c_busdisable_failed)
-			dev_err(ndev_dev(privdata),
-				"invalid i2c status after bus disable (%d)!\n",
-				sts);
+			pci_err(pdev, "invalid i2c status after bus disable (%d)!\n", sts);
 		break;
 	default:
 		break;
@@ -190,10 +183,10 @@ static void __amd_mp2_process_event(struct amd_i2c_common *i2c_common)
 void amd_mp2_process_event(struct amd_i2c_common *i2c_common)
 {
 	struct amd_mp2_dev *privdata = i2c_common->mp2_dev;
+	struct pci_dev *pdev = privdata->pci_dev;
 
 	if (unlikely(i2c_common->reqcmd == i2c_none)) {
-		dev_warn(ndev_dev(privdata),
-			 "received msg but no cmd was sent (bus = %d)!\n",
+		pci_warn(pdev, "received msg but no cmd was sent (bus = %d)!\n",
 			 i2c_common->bus_id);
 		return;
 	}
@@ -208,6 +201,7 @@ EXPORT_SYMBOL_GPL(amd_mp2_process_event);
 static irqreturn_t amd_mp2_irq_isr(int irq, void *dev)
 {
 	struct amd_mp2_dev *privdata = dev;
+	struct pci_dev *pdev = privdata->pci_dev;
 	struct amd_i2c_common *i2c_common;
 	u32 val;
 	unsigned int bus_id;
@@ -236,8 +230,7 @@ static irqreturn_t amd_mp2_irq_isr(int irq, void *dev)
 		val = readl(privdata->mmio + AMD_P2C_MSG_INTEN);
 		if (val != 0) {
 			writel(0, privdata->mmio + AMD_P2C_MSG_INTEN);
-			dev_warn(ndev_dev(privdata),
-				 "received irq without message\n");
+			pci_warn(pdev, "received irq without message\n");
 			ret = IRQ_HANDLED;
 		}
 	}
@@ -255,13 +248,13 @@ EXPORT_SYMBOL_GPL(amd_mp2_rw_timeout);
 int amd_mp2_register_cb(struct amd_i2c_common *i2c_common)
 {
 	struct amd_mp2_dev *privdata = i2c_common->mp2_dev;
+	struct pci_dev *pdev = privdata->pci_dev;
 
 	if (i2c_common->bus_id > 1)
 		return -EINVAL;
 
 	if (privdata->busses[i2c_common->bus_id]) {
-		dev_err(ndev_dev(privdata),
-			"Bus %d already taken!\n", i2c_common->bus_id);
+		pci_err(pdev, "Bus %d already taken!\n", i2c_common->bus_id);
 		return -EINVAL;
 	}
 
@@ -301,13 +294,13 @@ static int amd_mp2_pci_init(struct amd_mp2_dev *privdata,
 
 	rc = pcim_enable_device(pci_dev);
 	if (rc) {
-		dev_err(ndev_dev(privdata), "Failed to enable MP2 PCI device\n");
+		pci_err(pci_dev, "Failed to enable MP2 PCI device\n");
 		goto err_pci_enable;
 	}
 
 	rc = pcim_iomap_regions(pci_dev, 1 << 2, pci_name(pci_dev));
 	if (rc) {
-		dev_err(ndev_dev(privdata), "I/O memory remapping failed\n");
+		pci_err(pci_dev, "I/O memory remapping failed\n");
 		goto err_pci_enable;
 	}
 	privdata->mmio = pcim_iomap_table(pci_dev)[2];
@@ -327,7 +320,7 @@ static int amd_mp2_pci_init(struct amd_mp2_dev *privdata,
 	rc = devm_request_irq(&pci_dev->dev, pci_dev->irq, amd_mp2_irq_isr,
 			      IRQF_SHARED, dev_name(&pci_dev->dev), privdata);
 	if (rc)
-		dev_err(&pci_dev->dev, "Failure requesting irq %i: %d\n",
+		pci_err(pci_dev, "Failure requesting irq %i: %d\n",
 			pci_dev->irq, rc);
 
 	return rc;
@@ -363,7 +356,7 @@ static int amd_mp2_pci_probe(struct pci_dev *pci_dev,
 
 	privdata->probed = true;
 
-	dev_info(&pci_dev->dev, "MP2 device registered.\n");
+	pci_info(pci_dev, "MP2 device registered.\n");
 	return 0;
 }
 
@@ -397,8 +390,7 @@ static int amd_mp2_pci_suspend(struct device *dev)
 
 	ret = pci_save_state(pci_dev);
 	if (ret) {
-		dev_err(ndev_dev(privdata),
-			"pci_save_state failed = %d\n", ret);
+		pci_err(pci_dev, "pci_save_state failed = %d\n", ret);
 		return ret;
 	}
 
@@ -417,8 +409,7 @@ static int amd_mp2_pci_resume(struct device *dev)
 	pci_restore_state(pci_dev);
 	ret = pci_enable_device(pci_dev);
 	if (ret < 0) {
-		dev_err(ndev_dev(privdata),
-			"pci_enable_device failed = %d\n", ret);
+		pci_err(pci_dev, "pci_enable_device failed = %d\n", ret);
 		return ret;
 	}
 

drivers/i2c/busses/i2c-amd-mp2-plat.c

@@ -88,8 +88,7 @@ static void i2c_amd_cmd_completion(struct amd_i2c_common *i2c_common)
 	union i2c_event *event = &i2c_common->eventval;
 
 	if (event->r.status == i2c_readcomplete_event)
-		dev_dbg(&i2c_dev->pdev->dev, "%s readdata:%*ph\n",
-			__func__, event->r.length,
+		dev_dbg(&i2c_dev->pdev->dev, "readdata:%*ph\n", event->r.length,
 			i2c_common->msg->buf);
 
 	complete(&i2c_dev->cmd_complete);

drivers/i2c/busses/i2c-amd-mp2.h

@@ -185,12 +185,6 @@ struct amd_mp2_dev {
 	unsigned int probed;
 };
 
-#define ndev_pdev(ndev) ((ndev)->pci_dev)
-#define ndev_name(ndev) pci_name(ndev_pdev(ndev))
-#define ndev_dev(ndev) (&ndev_pdev(ndev)->dev)
-#define work_amd_i2c_common(__work) \
-	container_of(__work, struct amd_i2c_common, work.work)
-
 /* PCIe communication driver */
 
 int amd_mp2_rw(struct amd_i2c_common *i2c_common, enum i2c_cmd reqcmd);

drivers/i2c/busses/i2c-digicolor.c

@@ -160,12 +160,11 @@ static irqreturn_t dc_i2c_irq(int irq, void *dev_id)
 {
 	struct dc_i2c *i2c = dev_id;
 	int cmd_status = dc_i2c_cmd_status(i2c);
-	unsigned long flags;
 	u8 addr_cmd;
 
 	writeb_relaxed(1, i2c->regs + II_INTFLAG_CLEAR);
 
-	spin_lock_irqsave(&i2c->lock, flags);
+	spin_lock(&i2c->lock);
 
 	if (cmd_status == II_CMD_STATUS_ACK_BAD
 	    || cmd_status == II_CMD_STATUS_ABORT) {
@@ -207,7 +206,7 @@ static irqreturn_t dc_i2c_irq(int irq, void *dev_id)
 	}
 
 out:
-	spin_unlock_irqrestore(&i2c->lock, flags);
+	spin_unlock(&i2c->lock);
 	return IRQ_HANDLED;
 }
 

drivers/i2c/busses/i2c-elektor.c

@@ -49,7 +49,7 @@ static int mmapped;
 
 static wait_queue_head_t pcf_wait;
 static int pcf_pending;
-static spinlock_t lock;
+static DEFINE_SPINLOCK(lock);
 
 static struct i2c_adapter pcf_isa_ops;
 
@@ -132,7 +132,6 @@ static irqreturn_t pcf_isa_handler(int this_irq, void *dev_id) {
 
 static int pcf_isa_init(void)
 {
-	spin_lock_init(&lock);
 	if (!mmapped) {
 		if (!request_region(base, 2, pcf_isa_ops.name)) {
 			printk(KERN_ERR "%s: requested I/O region (%#x:2) is "

drivers/i2c/busses/i2c-gpio.c

@@ -520,5 +520,5 @@ module_exit(i2c_gpio_exit);
 
 MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
 MODULE_DESCRIPTION("Platform-independent bitbanging I2C driver");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("platform:i2c-gpio");

drivers/i2c/busses/i2c-hix5hd2.c

@@ -413,10 +413,8 @@ static int hix5hd2_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(priv->regs);
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0) {
-		dev_err(&pdev->dev, "cannot find HS-I2C IRQ\n");
+	if (irq <= 0)
 		return irq;
-	}
 
 	priv->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(priv->clk)) {

drivers/i2c/busses/i2c-i801.c

@@ -72,6 +72,7 @@
  * Jasper Lake (SOC)		0x4da3	32	hard	yes	yes	yes
  * Comet Lake-V (PCH)		0xa3a3	32	hard	yes	yes	yes
  * Alder Lake-S (PCH)		0x7aa3	32	hard	yes	yes	yes
+ * Alder Lake-P (PCH)		0x51a3	32	hard	yes	yes	yes
  *
  * Features supported by this driver:
  * Software PEC				no
@@ -228,6 +229,7 @@
 #define PCI_DEVICE_ID_INTEL_TIGERLAKE_H_SMBUS		0x43a3
 #define PCI_DEVICE_ID_INTEL_ELKHART_LAKE_SMBUS		0x4b23
 #define PCI_DEVICE_ID_INTEL_JASPER_LAKE_SMBUS		0x4da3
+#define PCI_DEVICE_ID_INTEL_ALDER_LAKE_P_SMBUS		0x51a3
 #define PCI_DEVICE_ID_INTEL_BROXTON_SMBUS		0x5ad4
 #define PCI_DEVICE_ID_INTEL_ALDER_LAKE_S_SMBUS		0x7aa3
 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS		0x8c22
@@ -1084,6 +1086,7 @@ static const struct pci_device_id i801_ids[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TIGERLAKE_H_SMBUS) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_JASPER_LAKE_SMBUS) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ALDER_LAKE_S_SMBUS) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ALDER_LAKE_P_SMBUS) },
 	{ 0, }
 };
 
@@ -1433,7 +1436,7 @@ static int i801_add_mux(struct i801_priv *priv)
 	const struct i801_mux_config *mux_config;
 	struct i2c_mux_gpio_platform_data gpio_data;
 	struct gpiod_lookup_table *lookup;
-	int err, i;
+	int i;
 
 	if (!priv->mux_drvdata)
 		return 0;
@@ -1473,21 +1476,16 @@ static int i801_add_mux(struct i801_priv *priv)
 				PLATFORM_DEVID_NONE, &gpio_data,
 				sizeof(struct i2c_mux_gpio_platform_data));
 	if (IS_ERR(priv->mux_pdev)) {
-		err = PTR_ERR(priv->mux_pdev);
 		gpiod_remove_lookup_table(lookup);
-		priv->mux_pdev = NULL;
 		dev_err(dev, "Failed to register i2c-mux-gpio device\n");
-		return err;
 	}
 
-	return 0;
+	return PTR_ERR_OR_ZERO(priv->mux_pdev);
 }
 
 static void i801_del_mux(struct i801_priv *priv)
 {
-	if (priv->mux_pdev)
 	platform_device_unregister(priv->mux_pdev);
-	if (priv->lookup)
 	gpiod_remove_lookup_table(priv->lookup);
 }
 
@@ -1772,6 +1770,7 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
 	case PCI_DEVICE_ID_INTEL_JASPER_LAKE_SMBUS:
 	case PCI_DEVICE_ID_INTEL_EBG_SMBUS:
 	case PCI_DEVICE_ID_INTEL_ALDER_LAKE_S_SMBUS:
+	case PCI_DEVICE_ID_INTEL_ALDER_LAKE_P_SMBUS:
 		priv->features |= FEATURE_BLOCK_PROC;
 		priv->features |= FEATURE_I2C_BLOCK_READ;
 		priv->features |= FEATURE_IRQ;

drivers/i2c/busses/i2c-imx.c

@@ -209,6 +209,7 @@ struct imx_i2c_struct {
 
 	struct imx_i2c_dma	*dma;
 	struct i2c_client	*slave;
+	enum i2c_slave_event last_slave_event;
 };
 
 static const struct imx_i2c_hwdata imx1_i2c_hwdata = {
@@ -550,7 +551,7 @@ static void i2c_imx_set_clk(struct imx_i2c_struct *i2c_imx,
 
 	i2c_imx->cur_clk = i2c_clk_rate;
 
-	div = (i2c_clk_rate + i2c_imx->bitrate - 1) / i2c_imx->bitrate;
+	div = DIV_ROUND_UP(i2c_clk_rate, i2c_imx->bitrate);
 	if (div < i2c_clk_div[0].div)
 		i = 0;
 	else if (div > i2c_clk_div[i2c_imx->hwdata->ndivs - 1].div)
@@ -568,8 +569,8 @@ static void i2c_imx_set_clk(struct imx_i2c_struct *i2c_imx,
 	 * This delay is used in I2C bus disable function
 	 * to fix chip hardware bug.
 	 */
-	i2c_imx->disable_delay = (500000U * i2c_clk_div[i].div
-		+ (i2c_clk_rate / 2) - 1) / (i2c_clk_rate / 2);
+	i2c_imx->disable_delay = DIV_ROUND_UP(500000U * i2c_clk_div[i].div,
+					      i2c_clk_rate / 2);
 
 #ifdef CONFIG_I2C_DEBUG_BUS
 	dev_dbg(&i2c_imx->adapter.dev, "I2C_CLK=%d, REQ DIV=%d\n",
@@ -675,6 +676,36 @@ static void i2c_imx_enable_bus_idle(struct imx_i2c_struct *i2c_imx)
 	}
 }
 
+static void i2c_imx_slave_event(struct imx_i2c_struct *i2c_imx,
+				enum i2c_slave_event event, u8 *val)
+{
+	i2c_slave_event(i2c_imx->slave, event, val);
+	i2c_imx->last_slave_event = event;
+}
+
+static void i2c_imx_slave_finish_op(struct imx_i2c_struct *i2c_imx)
+{
+	u8 val;
+
+	while (i2c_imx->last_slave_event != I2C_SLAVE_STOP) {
+		switch (i2c_imx->last_slave_event) {
+		case I2C_SLAVE_READ_REQUESTED:
+			i2c_imx_slave_event(i2c_imx, I2C_SLAVE_READ_PROCESSED,
+					    &val);
+			break;
+
+		case I2C_SLAVE_WRITE_REQUESTED:
+		case I2C_SLAVE_READ_PROCESSED:
+		case I2C_SLAVE_WRITE_RECEIVED:
+			i2c_imx_slave_event(i2c_imx, I2C_SLAVE_STOP, &val);
+			break;
+
+		case I2C_SLAVE_STOP:
+			break;
+		}
+	}
+}
+
 static irqreturn_t i2c_imx_slave_isr(struct imx_i2c_struct *i2c_imx,
 				     unsigned int status, unsigned int ctl)
 {
@@ -687,9 +718,11 @@ static irqreturn_t i2c_imx_slave_isr(struct imx_i2c_struct *i2c_imx,
 	}
 
 	if (status & I2SR_IAAS) { /* Addressed as a slave */
+		i2c_imx_slave_finish_op(i2c_imx);
 		if (status & I2SR_SRW) { /* Master wants to read from us*/
 			dev_dbg(&i2c_imx->adapter.dev, "read requested");
-			i2c_slave_event(i2c_imx->slave, I2C_SLAVE_READ_REQUESTED, &value);
+			i2c_imx_slave_event(i2c_imx,
+					    I2C_SLAVE_READ_REQUESTED, &value);
 
 			/* Slave transmit */
 			ctl |= I2CR_MTX;
@@ -699,7 +732,8 @@ static irqreturn_t i2c_imx_slave_isr(struct imx_i2c_struct *i2c_imx,
 			imx_i2c_write_reg(value, i2c_imx, IMX_I2C_I2DR);
 		} else { /* Master wants to write to us */
 			dev_dbg(&i2c_imx->adapter.dev, "write requested");
-			i2c_slave_event(i2c_imx->slave,	I2C_SLAVE_WRITE_REQUESTED, &value);
+			i2c_imx_slave_event(i2c_imx,
+					    I2C_SLAVE_WRITE_REQUESTED, &value);
 
 			/* Slave receive */
 			ctl &= ~I2CR_MTX;
@@ -710,17 +744,20 @@ static irqreturn_t i2c_imx_slave_isr(struct imx_i2c_struct *i2c_imx,
 	} else if (!(ctl & I2CR_MTX)) { /* Receive mode */
 		if (status & I2SR_IBB) { /* No STOP signal detected */
 			value = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);
-			i2c_slave_event(i2c_imx->slave,	I2C_SLAVE_WRITE_RECEIVED, &value);
+			i2c_imx_slave_event(i2c_imx,
+					    I2C_SLAVE_WRITE_RECEIVED, &value);
 		} else { /* STOP signal is detected */
 			dev_dbg(&i2c_imx->adapter.dev,
 				"STOP signal detected");
-			i2c_slave_event(i2c_imx->slave, I2C_SLAVE_STOP, &value);
+			i2c_imx_slave_event(i2c_imx,
+					    I2C_SLAVE_STOP, &value);
 		}
 	} else if (!(status & I2SR_RXAK)) { /* Transmit mode received ACK */
 		ctl |= I2CR_MTX;
 		imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);
 
-		i2c_slave_event(i2c_imx->slave,	I2C_SLAVE_READ_PROCESSED, &value);
+		i2c_imx_slave_event(i2c_imx,
+				    I2C_SLAVE_READ_PROCESSED, &value);
 
 		imx_i2c_write_reg(value, i2c_imx, IMX_I2C_I2DR);
 	} else { /* Transmit mode received NAK */
@@ -761,6 +798,7 @@ static int i2c_imx_reg_slave(struct i2c_client *client)
 		return -EBUSY;
 
 	i2c_imx->slave = client;
+	i2c_imx->last_slave_event = I2C_SLAVE_STOP;
 
 	/* Resume */
 	ret = pm_runtime_get_sync(i2c_imx->adapter.dev.parent);
@@ -813,10 +851,17 @@ static irqreturn_t i2c_imx_isr(int irq, void *dev_id)
 
 	status = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);
 	ctl = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);
+
 	if (status & I2SR_IIF) {
 		i2c_imx_clear_irq(i2c_imx, I2SR_IIF);
-		if (i2c_imx->slave && !(ctl & I2CR_MSTA))
+		if (i2c_imx->slave) {
+			if (!(ctl & I2CR_MSTA)) {
 				return i2c_imx_slave_isr(i2c_imx, status, ctl);
+			} else if (i2c_imx->last_slave_event !=
+				   I2C_SLAVE_STOP) {
+				i2c_imx_slave_finish_op(i2c_imx);
+			}
+		}
 		return i2c_imx_master_isr(i2c_imx, status);
 	}
 

drivers/i2c/busses/i2c-jz4780.c

@@ -437,9 +437,8 @@ static irqreturn_t jz4780_i2c_irq(int irqno, void *dev_id)
 	unsigned short intst;
 	unsigned short intmsk;
 	struct jz4780_i2c *i2c = dev_id;
-	unsigned long flags;
 
-	spin_lock_irqsave(&i2c->lock, flags);
+	spin_lock(&i2c->lock);
 	intmsk = jz4780_i2c_readw(i2c, JZ4780_I2C_INTM);
 	intst = jz4780_i2c_readw(i2c, JZ4780_I2C_INTST);
 
@@ -551,7 +550,7 @@ static irqreturn_t jz4780_i2c_irq(int irqno, void *dev_id)
 	}
 
 done:
-	spin_unlock_irqrestore(&i2c->lock, flags);
+	spin_unlock(&i2c->lock);
 	return IRQ_HANDLED;
 }
 

drivers/i2c/busses/i2c-mlxcpld.c

+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
 /*
- * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
- * Copyright (c) 2016 Michael Shych <michaels@mellanox.com>
+ * Mellanox i2c driver
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the names of the copyright holders nor the names of its
- *    contributors may be used to endorse or promote products derived from
- *    this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * Copyright (C) 2016-2020 Mellanox Technologies
  */
 
 #include <linux/delay.h>
@@ -37,7 +11,9 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/platform_data/mlxreg.h>
 #include <linux/platform_device.h>
+#include <linux/regmap.h>
 
 /* General defines */
 #define MLXPLAT_CPLD_LPC_I2C_BASE_ADDR	0x2000
@@ -51,7 +27,7 @@
 #define MLXCPLD_I2C_MAX_ADDR_LEN	4
 #define MLXCPLD_I2C_RETR_NUM		2
 #define MLXCPLD_I2C_XFER_TO		500000 /* usec */
-#define MLXCPLD_I2C_POLL_TIME		2000   /* usec */
+#define MLXCPLD_I2C_POLL_TIME		400   /* usec */
 
 /* LPC I2C registers */
 #define MLXCPLD_LPCI2C_CPBLTY_REG	0x0
@@ -72,6 +48,16 @@
 #define MLXCPLD_LPCI2C_ACK_IND		1
 #define MLXCPLD_LPCI2C_NACK_IND		2
 
+#define MLXCPLD_I2C_FREQ_1000KHZ_SET	0x04
+#define MLXCPLD_I2C_FREQ_400KHZ_SET	0x0f
+#define MLXCPLD_I2C_FREQ_100KHZ_SET	0x42
+
+enum mlxcpld_i2c_frequency {
+	MLXCPLD_I2C_FREQ_1000KHZ = 1,
+	MLXCPLD_I2C_FREQ_400KHZ = 2,
+	MLXCPLD_I2C_FREQ_100KHZ = 3,
+};
+
 struct  mlxcpld_i2c_curr_xfer {
 	u8 cmd;
 	u8 addr_width;
@@ -489,8 +475,45 @@ static struct i2c_adapter mlxcpld_i2c_adapter = {
 	.nr		= MLXCPLD_I2C_BUS_NUM,
 };
 
+static int
+mlxcpld_i2c_set_frequency(struct mlxcpld_i2c_priv *priv,
+			  struct mlxreg_core_hotplug_platform_data *pdata)
+{
+	struct mlxreg_core_item *item = pdata->items;
+	struct mlxreg_core_data *data;
+	u32 regval;
+	u8 freq;
+	int err;
+
+	if (!item)
+		return 0;
+
+	/* Read frequency setting. */
+	data = item->data;
+	err = regmap_read(pdata->regmap, data->reg, &regval);
+	if (err)
+		return err;
+
+	/* Set frequency only if it is not 100KHz, which is default. */
+	switch ((data->reg & data->mask) >> data->bit) {
+	case MLXCPLD_I2C_FREQ_1000KHZ:
+		freq = MLXCPLD_I2C_FREQ_1000KHZ_SET;
+		break;
+	case MLXCPLD_I2C_FREQ_400KHZ:
+		freq = MLXCPLD_I2C_FREQ_400KHZ_SET;
+		break;
+	default:
+		return 0;
+	}
+
+	mlxcpld_i2c_write_comm(priv, MLXCPLD_LPCI2C_HALF_CYC_REG, &freq, 1);
+
+	return 0;
+}
+
 static int mlxcpld_i2c_probe(struct platform_device *pdev)
 {
+	struct mlxreg_core_hotplug_platform_data *pdata;
 	struct mlxcpld_i2c_priv *priv;
 	int err;
 	u8 val;
@@ -505,6 +528,14 @@ static int mlxcpld_i2c_probe(struct platform_device *pdev)
 	priv->dev = &pdev->dev;
 	priv->base_addr = MLXPLAT_CPLD_LPC_I2C_BASE_ADDR;
 
+	/* Set I2C bus frequency if platform data provides this info. */
+	pdata = dev_get_platdata(&pdev->dev);
+	if (pdata) {
+		err = mlxcpld_i2c_set_frequency(priv, pdata);
+		if (err)
+			goto mlxcpld_i2_probe_failed;
+	}
+
 	/* Register with i2c layer */
 	mlxcpld_i2c_adapter.timeout = usecs_to_jiffies(MLXCPLD_I2C_XFER_TO);
 	/* Read capability register */
@@ -523,8 +554,12 @@ static int mlxcpld_i2c_probe(struct platform_device *pdev)
 
 	err = i2c_add_numbered_adapter(&priv->adap);
 	if (err)
-		mutex_destroy(&priv->lock);
+		goto mlxcpld_i2_probe_failed;
 
+	return 0;
+
+mlxcpld_i2_probe_failed:
+	mutex_destroy(&priv->lock);
 	return err;
 }
 

drivers/i2c/busses/i2c-mv64xxx.c

@@ -18,6 +18,7 @@
 #include <linux/mv643xx_i2c.h>
 #include <linux/platform_device.h>
 #include <linux/pinctrl/consumer.h>
+#include <linux/pm_runtime.h>
 #include <linux/reset.h>
 #include <linux/io.h>
 #include <linux/of.h>
@@ -717,6 +718,10 @@ mv64xxx_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
 	struct mv64xxx_i2c_data *drv_data = i2c_get_adapdata(adap);
 	int rc, ret = num;
 
+	rc = pm_runtime_resume_and_get(&adap->dev);
+	if (rc)
+		return rc;
+
 	BUG_ON(drv_data->msgs != NULL);
 	drv_data->msgs = msgs;
 	drv_data->num_msgs = num;
@@ -732,6 +737,9 @@ mv64xxx_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
 	drv_data->num_msgs = 0;
 	drv_data->msgs = NULL;
 
+	pm_runtime_mark_last_busy(&adap->dev);
+	pm_runtime_put_autosuspend(&adap->dev);
+
 	return ret;
 }
 
@@ -805,7 +813,7 @@ mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data,
 	 * need to know tclk in order to calculate bus clock
 	 * factors.
 	 */
-	if (IS_ERR(drv_data->clk)) {
+	if (!drv_data->clk) {
 		rc = -ENODEV;
 		goto out;
 	}
@@ -828,7 +836,6 @@ mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data,
 		rc = PTR_ERR(drv_data->rstc);
 		goto out;
 	}
-	reset_control_deassert(drv_data->rstc);
 
 	/* Its not yet defined how timeouts will be specified in device tree.
 	 * So hard code the value to 1 second.
@@ -893,6 +900,32 @@ static int mv64xxx_i2c_init_recovery_info(struct mv64xxx_i2c_data *drv_data,
 	return 0;
 }
 
+static int
+mv64xxx_i2c_runtime_suspend(struct device *dev)
+{
+	struct mv64xxx_i2c_data *drv_data = dev_get_drvdata(dev);
+
+	reset_control_assert(drv_data->rstc);
+	clk_disable_unprepare(drv_data->reg_clk);
+	clk_disable_unprepare(drv_data->clk);
+
+	return 0;
+}
+
+static int
+mv64xxx_i2c_runtime_resume(struct device *dev)
+{
+	struct mv64xxx_i2c_data *drv_data = dev_get_drvdata(dev);
+
+	clk_prepare_enable(drv_data->clk);
+	clk_prepare_enable(drv_data->reg_clk);
+	reset_control_reset(drv_data->rstc);
+
+	mv64xxx_i2c_hw_init(drv_data);
+
+	return 0;
+}
+
 static int
 mv64xxx_i2c_probe(struct platform_device *pd)
 {
@@ -920,18 +953,22 @@ mv64xxx_i2c_probe(struct platform_device *pd)
 
 	/* Not all platforms have clocks */
 	drv_data->clk = devm_clk_get(&pd->dev, NULL);
+	if (IS_ERR(drv_data->clk)) {
 		if (PTR_ERR(drv_data->clk) == -EPROBE_DEFER)
 			return -EPROBE_DEFER;
-	if (!IS_ERR(drv_data->clk))
-		clk_prepare_enable(drv_data->clk);
+		drv_data->clk = NULL;
+	}
 
 	drv_data->reg_clk = devm_clk_get(&pd->dev, "reg");
+	if (IS_ERR(drv_data->reg_clk)) {
 		if (PTR_ERR(drv_data->reg_clk) == -EPROBE_DEFER)
 			return -EPROBE_DEFER;
-	if (!IS_ERR(drv_data->reg_clk))
-		clk_prepare_enable(drv_data->reg_clk);
+		drv_data->reg_clk = NULL;
+	}
 
 	drv_data->irq = platform_get_irq(pd, 0);
+	if (drv_data->irq < 0)
+		return drv_data->irq;
 
 	if (pdata) {
 		drv_data->freq_m = pdata->freq_m;
@@ -942,16 +979,12 @@ mv64xxx_i2c_probe(struct platform_device *pd)
 	} else if (pd->dev.of_node) {
 		rc = mv64xxx_of_config(drv_data, &pd->dev);
 		if (rc)
-			goto exit_clk;
-	}
-	if (drv_data->irq < 0) {
-		rc = drv_data->irq;
-		goto exit_reset;
+			return rc;
 	}
 
 	rc = mv64xxx_i2c_init_recovery_info(drv_data, &pd->dev);
 	if (rc == -EPROBE_DEFER)
-		goto exit_reset;
+		return rc;
 
 	drv_data->adapter.dev.parent = &pd->dev;
 	drv_data->adapter.algo = &mv64xxx_i2c_algo;
@@ -962,7 +995,14 @@ mv64xxx_i2c_probe(struct platform_device *pd)
 	platform_set_drvdata(pd, drv_data);
 	i2c_set_adapdata(&drv_data->adapter, drv_data);
 
-	mv64xxx_i2c_hw_init(drv_data);
+	pm_runtime_set_autosuspend_delay(&pd->dev, MSEC_PER_SEC);
+	pm_runtime_use_autosuspend(&pd->dev);
+	pm_runtime_enable(&pd->dev);
+	if (!pm_runtime_enabled(&pd->dev)) {
+		rc = mv64xxx_i2c_runtime_resume(&pd->dev);
+		if (rc)
+			goto exit_disable_pm;
+	}
 
 	rc = request_irq(drv_data->irq, mv64xxx_i2c_intr, 0,
 			 MV64XXX_I2C_CTLR_NAME, drv_data);
@@ -970,7 +1010,7 @@ mv64xxx_i2c_probe(struct platform_device *pd)
 		dev_err(&drv_data->adapter.dev,
 			"mv64xxx: Can't register intr handler irq%d: %d\n",
 			drv_data->irq, rc);
-		goto exit_reset;
+		goto exit_disable_pm;
 	} else if ((rc = i2c_add_numbered_adapter(&drv_data->adapter)) != 0) {
 		dev_err(&drv_data->adapter.dev,
 			"mv64xxx: Can't add i2c adapter, rc: %d\n", -rc);
@@ -981,54 +1021,50 @@ mv64xxx_i2c_probe(struct platform_device *pd)
 
 exit_free_irq:
 	free_irq(drv_data->irq, drv_data);
-exit_reset:
-	reset_control_assert(drv_data->rstc);
-exit_clk:
-	clk_disable_unprepare(drv_data->reg_clk);
-	clk_disable_unprepare(drv_data->clk);
+exit_disable_pm:
+	pm_runtime_disable(&pd->dev);
+	if (!pm_runtime_status_suspended(&pd->dev))
+		mv64xxx_i2c_runtime_suspend(&pd->dev);
 
 	return rc;
 }
 
 static int
-mv64xxx_i2c_remove(struct platform_device *dev)
+mv64xxx_i2c_remove(struct platform_device *pd)
 {
-	struct mv64xxx_i2c_data		*drv_data = platform_get_drvdata(dev);
+	struct mv64xxx_i2c_data		*drv_data = platform_get_drvdata(pd);
 
 	i2c_del_adapter(&drv_data->adapter);
 	free_irq(drv_data->irq, drv_data);
-	reset_control_assert(drv_data->rstc);
-	clk_disable_unprepare(drv_data->reg_clk);
-	clk_disable_unprepare(drv_data->clk);
+	pm_runtime_disable(&pd->dev);
+	if (!pm_runtime_status_suspended(&pd->dev))
+		mv64xxx_i2c_runtime_suspend(&pd->dev);
 
 	return 0;
 }
 
-#ifdef CONFIG_PM
-static int mv64xxx_i2c_resume(struct device *dev)
+static void
+mv64xxx_i2c_shutdown(struct platform_device *pd)
 {
-	struct mv64xxx_i2c_data *drv_data = dev_get_drvdata(dev);
-
-	mv64xxx_i2c_hw_init(drv_data);
-
-	return 0;
+	pm_runtime_disable(&pd->dev);
+	if (!pm_runtime_status_suspended(&pd->dev))
+		mv64xxx_i2c_runtime_suspend(&pd->dev);
 }
 
-static const struct dev_pm_ops mv64xxx_i2c_pm = {
-	.resume = mv64xxx_i2c_resume,
+static const struct dev_pm_ops mv64xxx_i2c_pm_ops = {
+	SET_RUNTIME_PM_OPS(mv64xxx_i2c_runtime_suspend,
+			   mv64xxx_i2c_runtime_resume, NULL)
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				      pm_runtime_force_resume)
 };
 
-#define mv64xxx_i2c_pm_ops (&mv64xxx_i2c_pm)
-#else
-#define mv64xxx_i2c_pm_ops NULL
-#endif
-
 static struct platform_driver mv64xxx_i2c_driver = {
 	.probe	= mv64xxx_i2c_probe,
 	.remove	= mv64xxx_i2c_remove,
+	.shutdown = mv64xxx_i2c_shutdown,
 	.driver	= {
 		.name	= MV64XXX_I2C_CTLR_NAME,
-		.pm     = mv64xxx_i2c_pm_ops,
+		.pm     = &mv64xxx_i2c_pm_ops,
 		.of_match_table = mv64xxx_i2c_of_match_table,
 	},
 };

drivers/i2c/busses/i2c-qcom-geni.c

@@ -86,6 +86,9 @@ struct geni_i2c_dev {
 	u32 clk_freq_out;
 	const struct geni_i2c_clk_fld *clk_fld;
 	int suspended;
+	void *dma_buf;
+	size_t xfer_len;
+	dma_addr_t dma_addr;
 };
 
 struct geni_i2c_err_log {
@@ -348,14 +351,65 @@ static void geni_i2c_tx_fsm_rst(struct geni_i2c_dev *gi2c)
 		dev_err(gi2c->se.dev, "Timeout resetting TX_FSM\n");
 }
 
+static void geni_i2c_rx_msg_cleanup(struct geni_i2c_dev *gi2c,
+				     struct i2c_msg *cur)
+{
+	gi2c->cur_rd = 0;
+	if (gi2c->dma_buf) {
+		if (gi2c->err)
+			geni_i2c_rx_fsm_rst(gi2c);
+		geni_se_rx_dma_unprep(&gi2c->se, gi2c->dma_addr, gi2c->xfer_len);
+		i2c_put_dma_safe_msg_buf(gi2c->dma_buf, cur, !gi2c->err);
+	}
+}
+
+static void geni_i2c_tx_msg_cleanup(struct geni_i2c_dev *gi2c,
+				     struct i2c_msg *cur)
+{
+	gi2c->cur_wr = 0;
+	if (gi2c->dma_buf) {
+		if (gi2c->err)
+			geni_i2c_tx_fsm_rst(gi2c);
+		geni_se_tx_dma_unprep(&gi2c->se, gi2c->dma_addr, gi2c->xfer_len);
+		i2c_put_dma_safe_msg_buf(gi2c->dma_buf, cur, !gi2c->err);
+	}
+}
+
+static void geni_i2c_stop_xfer(struct geni_i2c_dev *gi2c)
+{
+	int ret;
+	u32 geni_status;
+	struct i2c_msg *cur;
+
+	/* Resume device, as runtime suspend can happen anytime during transfer */
+	ret = pm_runtime_get_sync(gi2c->se.dev);
+	if (ret < 0) {
+		dev_err(gi2c->se.dev, "Failed to resume device: %d\n", ret);
+		return;
+	}
+
+	geni_status = readl_relaxed(gi2c->se.base + SE_GENI_STATUS);
+	if (geni_status & M_GENI_CMD_ACTIVE) {
+		cur = gi2c->cur;
+		geni_i2c_abort_xfer(gi2c);
+		if (cur->flags & I2C_M_RD)
+			geni_i2c_rx_msg_cleanup(gi2c, cur);
+		else
+			geni_i2c_tx_msg_cleanup(gi2c, cur);
+	}
+
+	pm_runtime_put_sync_suspend(gi2c->se.dev);
+}
+
 static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
 				u32 m_param)
 {
-	dma_addr_t rx_dma;
+	dma_addr_t rx_dma = 0;
 	unsigned long time_left;
 	void *dma_buf;
 	struct geni_se *se = &gi2c->se;
 	size_t len = msg->len;
+	struct i2c_msg *cur;
 
 	dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
 	if (dma_buf)
@@ -370,19 +424,18 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
 		geni_se_select_mode(se, GENI_SE_FIFO);
 		i2c_put_dma_safe_msg_buf(dma_buf, msg, false);
 		dma_buf = NULL;
+	} else {
+		gi2c->xfer_len = len;
+		gi2c->dma_addr = rx_dma;
+		gi2c->dma_buf = dma_buf;
 	}
 
+	cur = gi2c->cur;
 	time_left = wait_for_completion_timeout(&gi2c->done, XFER_TIMEOUT);
 	if (!time_left)
 		geni_i2c_abort_xfer(gi2c);
 
-	gi2c->cur_rd = 0;
-	if (dma_buf) {
-		if (gi2c->err)
-			geni_i2c_rx_fsm_rst(gi2c);
-		geni_se_rx_dma_unprep(se, rx_dma, len);
-		i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err);
-	}
+	geni_i2c_rx_msg_cleanup(gi2c, cur);
 
 	return gi2c->err;
 }
@@ -390,11 +443,12 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
 static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
 				u32 m_param)
 {
-	dma_addr_t tx_dma;
+	dma_addr_t tx_dma = 0;
 	unsigned long time_left;
 	void *dma_buf;
 	struct geni_se *se = &gi2c->se;
 	size_t len = msg->len;
+	struct i2c_msg *cur;
 
 	dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
 	if (dma_buf)
@@ -409,22 +463,21 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
 		geni_se_select_mode(se, GENI_SE_FIFO);
 		i2c_put_dma_safe_msg_buf(dma_buf, msg, false);
 		dma_buf = NULL;
+	} else {
+		gi2c->xfer_len = len;
+		gi2c->dma_addr = tx_dma;
+		gi2c->dma_buf = dma_buf;
 	}
 
 	if (!dma_buf) /* Get FIFO IRQ */
 		writel_relaxed(1, se->base + SE_GENI_TX_WATERMARK_REG);
 
+	cur = gi2c->cur;
 	time_left = wait_for_completion_timeout(&gi2c->done, XFER_TIMEOUT);
 	if (!time_left)
 		geni_i2c_abort_xfer(gi2c);
 
-	gi2c->cur_wr = 0;
-	if (dma_buf) {
-		if (gi2c->err)
-			geni_i2c_tx_fsm_rst(gi2c);
-		geni_se_tx_dma_unprep(se, tx_dma, len);
-		i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err);
-	}
+	geni_i2c_tx_msg_cleanup(gi2c, cur);
 
 	return gi2c->err;
 }
@@ -623,6 +676,13 @@ static int geni_i2c_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static void  geni_i2c_shutdown(struct platform_device *pdev)
+{
+	struct geni_i2c_dev *gi2c = platform_get_drvdata(pdev);
+
+	geni_i2c_stop_xfer(gi2c);
+}
+
 static int __maybe_unused geni_i2c_runtime_suspend(struct device *dev)
 {
 	int ret;
@@ -687,6 +747,7 @@ MODULE_DEVICE_TABLE(of, geni_i2c_dt_match);
 static struct platform_driver geni_i2c_driver = {
 	.probe  = geni_i2c_probe,
 	.remove = geni_i2c_remove,
+	.shutdown = geni_i2c_shutdown,
 	.driver = {
 		.name = "geni_i2c",
 		.pm = &geni_i2c_pm_ops,

drivers/i2c/busses/i2c-qup.c

@@ -1603,7 +1603,7 @@ static int qup_i2c_xfer_v2(struct i2c_adapter *adap,
 
 static u32 qup_i2c_func(struct i2c_adapter *adap)
 {
-	return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK);
+	return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL_ALL & ~I2C_FUNC_SMBUS_QUICK);
 }
 
 static const struct i2c_algorithm qup_i2c_algo = {

drivers/i2c/busses/i2c-rcar.c

@@ -91,7 +91,6 @@
 
 #define RCAR_BUS_PHASE_START	(MDBS | MIE | ESG)
 #define RCAR_BUS_PHASE_DATA	(MDBS | MIE)
-#define RCAR_BUS_MASK_DATA	(~(ESG | FSB) & 0xFF)
 #define RCAR_BUS_PHASE_STOP	(MDBS | MIE | FSB)
 
 #define RCAR_IRQ_SEND	(MNR | MAL | MST | MAT | MDE)
@@ -120,6 +119,7 @@ enum rcar_i2c_type {
 };
 
 struct rcar_i2c_priv {
+	u32 flags;
 	void __iomem *io;
 	struct i2c_adapter adap;
 	struct i2c_msg *msg;
@@ -130,7 +130,6 @@ struct rcar_i2c_priv {
 
 	int pos;
 	u32 icccr;
-	u32 flags;
 	u8 recovery_icmcr;	/* protected by adapter lock */
 	enum rcar_i2c_type devtype;
 	struct i2c_client *slave;
@@ -621,27 +620,16 @@ static bool rcar_i2c_slave_irq(struct rcar_i2c_priv *priv)
 /*
  * This driver has a lock-free design because there are IP cores (at least
  * R-Car Gen2) which have an inherent race condition in their hardware design.
- * There, we need to clear RCAR_BUS_MASK_DATA bits as soon as possible after
+ * There, we need to switch to RCAR_BUS_PHASE_DATA as soon as possible after
  * the interrupt was generated, otherwise an unwanted repeated message gets
  * generated. It turned out that taking a spinlock at the beginning of the ISR
  * was already causing repeated messages. Thus, this driver was converted to
  * the now lockless behaviour. Please keep this in mind when hacking the driver.
+ * R-Car Gen3 seems to have this fixed but earlier versions than R-Car Gen2 are
+ * likely affected. Therefore, we have different interrupt handler entries.
  */
-static irqreturn_t rcar_i2c_irq(int irq, void *ptr)
+static irqreturn_t rcar_i2c_irq(int irq, struct rcar_i2c_priv *priv, u32 msr)
 {
-	struct rcar_i2c_priv *priv = ptr;
-	u32 msr, val;
-
-	/* Clear START or STOP immediately, except for REPSTART after read */
-	if (likely(!(priv->flags & ID_P_REP_AFTER_RD))) {
-		val = rcar_i2c_read(priv, ICMCR);
-		rcar_i2c_write(priv, ICMCR, val & RCAR_BUS_MASK_DATA);
-	}
-
-	msr = rcar_i2c_read(priv, ICMSR);
-
-	/* Only handle interrupts that are currently enabled */
-	msr &= rcar_i2c_read(priv, ICMIER);
 	if (!msr) {
 		if (rcar_i2c_slave_irq(priv))
 			return IRQ_HANDLED;
@@ -685,6 +673,41 @@ static irqreturn_t rcar_i2c_irq(int irq, void *ptr)
 	return IRQ_HANDLED;
 }
 
+static irqreturn_t rcar_i2c_gen2_irq(int irq, void *ptr)
+{
+	struct rcar_i2c_priv *priv = ptr;
+	u32 msr;
+
+	/* Clear START or STOP immediately, except for REPSTART after read */
+	if (likely(!(priv->flags & ID_P_REP_AFTER_RD)))
+		rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_DATA);
+
+	/* Only handle interrupts that are currently enabled */
+	msr = rcar_i2c_read(priv, ICMSR);
+	msr &= rcar_i2c_read(priv, ICMIER);
+
+	return rcar_i2c_irq(irq, priv, msr);
+}
+
+static irqreturn_t rcar_i2c_gen3_irq(int irq, void *ptr)
+{
+	struct rcar_i2c_priv *priv = ptr;
+	u32 msr;
+
+	/* Only handle interrupts that are currently enabled */
+	msr = rcar_i2c_read(priv, ICMSR);
+	msr &= rcar_i2c_read(priv, ICMIER);
+
+	/*
+	 * Clear START or STOP immediately, except for REPSTART after read or
+	 * if a spurious interrupt was detected.
+	 */
+	if (likely(!(priv->flags & ID_P_REP_AFTER_RD) && msr))
+		rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_DATA);
+
+	return rcar_i2c_irq(irq, priv, msr);
+}
+
 static struct dma_chan *rcar_i2c_request_dma_chan(struct device *dev,
 					enum dma_transfer_direction dir,
 					dma_addr_t port_addr)
@@ -931,6 +954,8 @@ static int rcar_i2c_probe(struct platform_device *pdev)
 	struct rcar_i2c_priv *priv;
 	struct i2c_adapter *adap;
 	struct device *dev = &pdev->dev;
+	unsigned long irqflags = 0;
+	irqreturn_t (*irqhandler)(int irq, void *ptr) = rcar_i2c_gen3_irq;
 	int ret;
 
 	/* Otherwise logic will break because some bytes must always use PIO */
@@ -979,6 +1004,11 @@ static int rcar_i2c_probe(struct platform_device *pdev)
 
 	rcar_i2c_write(priv, ICSAR, 0); /* Gen2: must be 0 if not using slave */
 
+	if (priv->devtype < I2C_RCAR_GEN3) {
+		irqflags |= IRQF_NO_THREAD;
+		irqhandler = rcar_i2c_gen2_irq;
+	}
+
 	if (priv->devtype == I2C_RCAR_GEN3) {
 		priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 		if (!IS_ERR(priv->rstc)) {
@@ -998,7 +1028,7 @@ static int rcar_i2c_probe(struct platform_device *pdev)
 		priv->flags |= ID_P_HOST_NOTIFY;
 
 	priv->irq = platform_get_irq(pdev, 0);
-	ret = devm_request_irq(dev, priv->irq, rcar_i2c_irq, 0, dev_name(dev), priv);
+	ret = devm_request_irq(dev, priv->irq, irqhandler, irqflags, dev_name(dev), priv);
 	if (ret < 0) {
 		dev_err(dev, "cannot get irq %d\n", priv->irq);
 		goto out_pm_disable;

drivers/i2c/busses/i2c-s3c2410.c

@@ -781,7 +781,7 @@ static int s3c24xx_i2c_xfer(struct i2c_adapter *adap,
 /* declare our i2c functionality */
 static u32 s3c24xx_i2c_func(struct i2c_adapter *adap)
 {
-	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_NOSTART |
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL_ALL | I2C_FUNC_NOSTART |
 		I2C_FUNC_PROTOCOL_MANGLING;
 }
 

drivers/i2c/busses/i2c-stm32f7.c

@@ -2035,12 +2035,8 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
 	}
 
 	irq_error = platform_get_irq(pdev, 1);
-	if (irq_error <= 0) {
-		if (irq_error != -EPROBE_DEFER)
-			dev_err(&pdev->dev, "Failed to get IRQ error: %d\n",
-				irq_error);
+	if (irq_error <= 0)
 		return irq_error ? : -ENOENT;
-	}
 
 	i2c_dev->wakeup_src = of_property_read_bool(pdev->dev.of_node,
 						    "wakeup-source");

drivers/i2c/busses/i2c-tegra.c

@@ -550,7 +550,7 @@ static int tegra_i2c_poll_register(struct tegra_i2c_dev *i2c_dev,
 	void __iomem *addr = i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg);
 	u32 val;
 
-	if (!i2c_dev->atomic_mode && !in_irq())
+	if (!i2c_dev->atomic_mode)
 		return readl_relaxed_poll_timeout(addr, val, !(val & mask),
 						  delay_us, timeout_us);
 
@@ -1739,9 +1739,10 @@ static int tegra_i2c_probe(struct platform_device *pdev)
 	/* interrupt will be enabled during of transfer time */
 	irq_set_status_flags(i2c_dev->irq, IRQ_NOAUTOEN);
 
-	err = devm_request_irq(i2c_dev->dev, i2c_dev->irq, tegra_i2c_isr,
-			       IRQF_NO_SUSPEND, dev_name(i2c_dev->dev),
-			       i2c_dev);
+	err = devm_request_threaded_irq(i2c_dev->dev, i2c_dev->irq,
+					NULL, tegra_i2c_isr,
+					IRQF_NO_SUSPEND | IRQF_ONESHOT,
+					dev_name(i2c_dev->dev), i2c_dev);
 	if (err)
 		return err;
 

drivers/i2c/i2c-core-acpi.c

@@ -225,12 +225,8 @@ static void i2c_acpi_register_device(struct i2c_adapter *adapter,
 	adev->power.flags.ignore_parent = true;
 	acpi_device_set_enumerated(adev);
 
-	if (IS_ERR(i2c_new_client_device(adapter, info))) {
+	if (IS_ERR(i2c_new_client_device(adapter, info)))
 		adev->power.flags.ignore_parent = false;
-		dev_err(&adapter->dev,
-			"failed to add I2C device %s from ACPI\n",
-			dev_name(&adev->dev));
-	}
 }
 
 static acpi_status i2c_acpi_add_device(acpi_handle handle, u32 level,

drivers/i2c/i2c-core-smbus.c

@@ -323,8 +323,7 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr,
 	 */
 	unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX+3];
 	unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX+2];
-	int num = read_write == I2C_SMBUS_READ ? 2 : 1;
-	int i;
+	int nmsgs = read_write == I2C_SMBUS_READ ? 2 : 1;
 	u8 partial_pec = 0;
 	int status;
 	struct i2c_msg msg[2] = {
@@ -340,6 +339,8 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr,
 			.buf = msgbuf1,
 		},
 	};
+	bool wants_pec = ((flags & I2C_CLIENT_PEC) && size != I2C_SMBUS_QUICK
+			  && size != I2C_SMBUS_I2C_BLOCK_DATA);
 
 	msgbuf0[0] = command;
 	switch (size) {
@@ -348,13 +349,13 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr,
 		/* Special case: The read/write field is used as data */
 		msg[0].flags = flags | (read_write == I2C_SMBUS_READ ?
 					I2C_M_RD : 0);
-		num = 1;
+		nmsgs = 1;
 		break;
 	case I2C_SMBUS_BYTE:
 		if (read_write == I2C_SMBUS_READ) {
 			/* Special case: only a read! */
 			msg[0].flags = I2C_M_RD | flags;
-			num = 1;
+			nmsgs = 1;
 		}
 		break;
 	case I2C_SMBUS_BYTE_DATA:
@@ -375,7 +376,7 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr,
 		}
 		break;
 	case I2C_SMBUS_PROC_CALL:
-		num = 2; /* Special case */
+		nmsgs = 2; /* Special case */
 		read_write = I2C_SMBUS_READ;
 		msg[0].len = 3;
 		msg[1].len = 2;
@@ -398,12 +399,11 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr,
 			}
 
 			i2c_smbus_try_get_dmabuf(&msg[0], command);
-			for (i = 1; i < msg[0].len; i++)
-				msg[0].buf[i] = data->block[i - 1];
+			memcpy(msg[0].buf + 1, data->block, msg[0].len - 1);
 		}
 		break;
 	case I2C_SMBUS_BLOCK_PROC_CALL:
-		num = 2; /* Another special case */
+		nmsgs = 2; /* Another special case */
 		read_write = I2C_SMBUS_READ;
 		if (data->block[0] > I2C_SMBUS_BLOCK_MAX) {
 			dev_err(&adapter->dev,
@@ -414,8 +414,7 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr,
 
 		msg[0].len = data->block[0] + 2;
 		i2c_smbus_try_get_dmabuf(&msg[0], command);
-		for (i = 1; i < msg[0].len; i++)
-			msg[0].buf[i] = data->block[i - 1];
+		memcpy(msg[0].buf + 1, data->block, msg[0].len - 1);
 
 		msg[1].flags |= I2C_M_RECV_LEN;
 		msg[1].len = 1; /* block length will be added by
@@ -437,8 +436,7 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr,
 			msg[0].len = data->block[0] + 1;
 
 			i2c_smbus_try_get_dmabuf(&msg[0], command);
-			for (i = 1; i <= data->block[0]; i++)
-				msg[0].buf[i] = data->block[i];
+			memcpy(msg[0].buf + 1, data->block + 1, data->block[0]);
 		}
 		break;
 	default:
@@ -446,33 +444,31 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr,
 		return -EOPNOTSUPP;
 	}
 
-	i = ((flags & I2C_CLIENT_PEC) && size != I2C_SMBUS_QUICK
-				      && size != I2C_SMBUS_I2C_BLOCK_DATA);
-	if (i) {
+	if (wants_pec) {
 		/* Compute PEC if first message is a write */
 		if (!(msg[0].flags & I2C_M_RD)) {
-			if (num == 1) /* Write only */
+			if (nmsgs == 1) /* Write only */
 				i2c_smbus_add_pec(&msg[0]);
 			else /* Write followed by read */
 				partial_pec = i2c_smbus_msg_pec(0, &msg[0]);
 		}
 		/* Ask for PEC if last message is a read */
-		if (msg[num-1].flags & I2C_M_RD)
-			msg[num-1].len++;
+		if (msg[nmsgs - 1].flags & I2C_M_RD)
+			msg[nmsgs - 1].len++;
 	}
 
-	status = __i2c_transfer(adapter, msg, num);
+	status = __i2c_transfer(adapter, msg, nmsgs);
 	if (status < 0)
 		goto cleanup;
-	if (status != num) {
+	if (status != nmsgs) {
 		status = -EIO;
 		goto cleanup;
 	}
 	status = 0;
 
 	/* Check PEC if last message is a read */
-	if (i && (msg[num-1].flags & I2C_M_RD)) {
-		status = i2c_smbus_check_pec(partial_pec, &msg[num-1]);
+	if (wants_pec && (msg[nmsgs - 1].flags & I2C_M_RD)) {
+		status = i2c_smbus_check_pec(partial_pec, &msg[nmsgs - 1]);
 		if (status < 0)
 			goto cleanup;
 	}
@@ -490,8 +486,7 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr,
 			data->word = msgbuf1[0] | (msgbuf1[1] << 8);
 			break;
 		case I2C_SMBUS_I2C_BLOCK_DATA:
-			for (i = 0; i < data->block[0]; i++)
-				data->block[i + 1] = msg[1].buf[i];
+			memcpy(data->block + 1, msg[1].buf, data->block[0]);
 			break;
 		case I2C_SMBUS_BLOCK_DATA:
 		case I2C_SMBUS_BLOCK_PROC_CALL:
@@ -502,8 +497,7 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr,
 				status = -EPROTO;
 				goto cleanup;
 			}
-			for (i = 0; i < msg[1].buf[0] + 1; i++)
-				data->block[i] = msg[1].buf[i];
+			memcpy(data->block, msg[1].buf, msg[1].buf[0] + 1);
 			break;
 		}
 

drivers/i2c/i2c-slave-testunit.c

@@ -19,6 +19,7 @@
 enum testunit_cmds {
 	TU_CMD_READ_BYTES = 1,	/* save 0 for ABORT, RESET or similar */
 	TU_CMD_HOST_NOTIFY,
+	TU_CMD_SMBUS_BLOCK_PROC_CALL,
 	TU_NUM_CMDS
 };
 
@@ -88,6 +89,8 @@ static int i2c_slave_testunit_slave_cb(struct i2c_client *client,
 				     enum i2c_slave_event event, u8 *val)
 {
 	struct testunit_data *tu = i2c_get_clientdata(client);
+	bool is_proc_call = tu->reg_idx == 3 && tu->regs[TU_REG_DATAL] == 1 &&
+			    tu->regs[TU_REG_CMD] == TU_CMD_SMBUS_BLOCK_PROC_CALL;
 	int ret = 0;
 
 	switch (event) {
@@ -118,12 +121,17 @@ static int i2c_slave_testunit_slave_cb(struct i2c_client *client,
 		fallthrough;
 
 	case I2C_SLAVE_WRITE_REQUESTED:
+		memset(tu->regs, 0, TU_NUM_REGS);
 		tu->reg_idx = 0;
 		break;
 
-	case I2C_SLAVE_READ_REQUESTED:
 	case I2C_SLAVE_READ_PROCESSED:
-		*val = TU_CUR_VERSION;
+		if (is_proc_call && tu->regs[TU_REG_DATAH])
+			tu->regs[TU_REG_DATAH]--;
+		fallthrough;
+
+	case I2C_SLAVE_READ_REQUESTED:
+		*val = is_proc_call ? tu->regs[TU_REG_DATAH] : TU_CUR_VERSION;
 		break;
 	}
 

drivers/i2c/i2c-stub.c

@@ -7,7 +7,6 @@
 
 */
 
-#define DEBUG 1
 #define pr_fmt(fmt) "i2c-stub: " fmt
 
 #include <linux/errno.h>

drivers/i2c/muxes/i2c-mux-gpio.c

@@ -49,16 +49,57 @@ static int i2c_mux_gpio_deselect(struct i2c_mux_core *muxc, u32 chan)
 	return 0;
 }
 
-#ifdef CONFIG_OF
-static int i2c_mux_gpio_probe_dt(struct gpiomux *mux,
+#ifdef CONFIG_ACPI
+
+static int i2c_mux_gpio_get_acpi_adr(struct device *dev,
+				     struct fwnode_handle *fwdev,
+				     unsigned int *adr)
+
+{
+	unsigned long long adr64;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(ACPI_HANDLE_FWNODE(fwdev),
+				       METHOD_NAME__ADR,
+				       NULL, &adr64);
+
+	if (!ACPI_SUCCESS(status)) {
+		dev_err(dev, "Cannot get address\n");
+		return -EINVAL;
+	}
+
+	*adr = adr64;
+	if (*adr != adr64) {
+		dev_err(dev, "Address out of range\n");
+		return -ERANGE;
+	}
+
+	return 0;
+}
+
+#else
+
+static int i2c_mux_gpio_get_acpi_adr(struct device *dev,
+				     struct fwnode_handle *fwdev,
+				     unsigned int *adr)
+{
+	return -EINVAL;
+}
+
+#endif
+
+static int i2c_mux_gpio_probe_fw(struct gpiomux *mux,
 				 struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
-	struct device_node *adapter_np, *child;
-	struct i2c_adapter *adapter;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct device_node *adapter_np;
+	struct i2c_adapter *adapter = NULL;
+	struct fwnode_handle *child;
 	unsigned *values;
-	int i = 0;
+	int rc, i = 0;
 
+	if (is_of_node(dev->fwnode)) {
 		if (!np)
 			return -ENODEV;
 
@@ -69,40 +110,51 @@ static int i2c_mux_gpio_probe_dt(struct gpiomux *mux,
 		}
 		adapter = of_find_i2c_adapter_by_node(adapter_np);
 		of_node_put(adapter_np);
+
+	} else if (is_acpi_node(dev->fwnode)) {
+		/*
+		 * In ACPI land the mux should be a direct child of the i2c
+		 * bus it muxes.
+		 */
+		acpi_handle dev_handle = ACPI_HANDLE(dev->parent);
+
+		adapter = i2c_acpi_find_adapter_by_handle(dev_handle);
+	}
+
 	if (!adapter)
 		return -EPROBE_DEFER;
 
 	mux->data.parent = i2c_adapter_id(adapter);
 	put_device(&adapter->dev);
 
-	mux->data.n_values = of_get_child_count(np);
-
-	values = devm_kcalloc(&pdev->dev,
+	mux->data.n_values = device_get_child_node_count(dev);
+	values = devm_kcalloc(dev,
 			      mux->data.n_values, sizeof(*mux->data.values),
 			      GFP_KERNEL);
 	if (!values) {
-		dev_err(&pdev->dev, "Cannot allocate values array");
+		dev_err(dev, "Cannot allocate values array");
 		return -ENOMEM;
 	}
 
-	for_each_child_of_node(np, child) {
-		of_property_read_u32(child, "reg", values + i);
+	device_for_each_child_node(dev, child) {
+		if (is_of_node(child)) {
+			fwnode_property_read_u32(child, "reg", values + i);
+
+		} else if (is_acpi_node(child)) {
+			rc = i2c_mux_gpio_get_acpi_adr(dev, child, values + i);
+			if (rc)
+				return rc;
+		}
+
 		i++;
 	}
 	mux->data.values = values;
 
-	if (of_property_read_u32(np, "idle-state", &mux->data.idle))
+	if (fwnode_property_read_u32(dev->fwnode, "idle-state", &mux->data.idle))
 		mux->data.idle = I2C_MUX_GPIO_NO_IDLE;
 
 	return 0;
 }
-#else
-static int i2c_mux_gpio_probe_dt(struct gpiomux *mux,
-					struct platform_device *pdev)
-{
-	return 0;
-}
-#endif
 
 static int i2c_mux_gpio_probe(struct platform_device *pdev)
 {
@@ -118,7 +170,7 @@ static int i2c_mux_gpio_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	if (!dev_get_platdata(&pdev->dev)) {
-		ret = i2c_mux_gpio_probe_dt(mux, pdev);
+		ret = i2c_mux_gpio_probe_fw(mux, pdev);
 		if (ret < 0)
 			return ret;
 	} else {

drivers/i2c/muxes/i2c-mux-mlxcpld.c

+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
 /*
- * drivers/i2c/muxes/i2c-mux-mlxcpld.c
- * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
- * Copyright (c) 2016 Michael Shych <michaels@mellanox.com>
+ * Mellanox i2c mux driver
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the names of the copyright holders nor the names of its
- *    contributors may be used to endorse or promote products derived from
- *    this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * Copyright (C) 2016-2020 Mellanox Technologies
  */
 
 #include <linux/device.h>
@@ -38,19 +11,19 @@
 #include <linux/io.h>
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/platform_data/x86/mlxcpld.h>
+#include <linux/platform_data/mlxcpld.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 
-#define CPLD_MUX_MAX_NCHANS	8
-
 /* mlxcpld_mux - mux control structure:
- * @last_chan - last register value
+ * @last_val - last selected register value or -1 if mux deselected
  * @client - I2C device client
+ * @pdata: platform data
  */
 struct mlxcpld_mux {
-	u8 last_chan;
+	int last_val;
 	struct i2c_client *client;
+	struct mlxcpld_mux_plat_data pdata;
 };
 
 /* MUX logic description.
@@ -81,37 +54,50 @@ struct mlxcpld_mux {
  *
  */
 
-static const struct i2c_device_id mlxcpld_mux_id[] = {
-	{ "mlxcpld_mux_module", 0 },
-	{ }
-};
-MODULE_DEVICE_TABLE(i2c, mlxcpld_mux_id);
-
 /* Write to mux register. Don't use i2c_transfer() and i2c_smbus_xfer()
  * for this as they will try to lock adapter a second time.
  */
 static int mlxcpld_mux_reg_write(struct i2c_adapter *adap,
-				 struct i2c_client *client, u8 val)
+				 struct mlxcpld_mux *mux, u32 val)
 {
-	struct mlxcpld_mux_plat_data *pdata = dev_get_platdata(&client->dev);
-	union i2c_smbus_data data = { .byte = val };
-
+	struct i2c_client *client = mux->client;
+	union i2c_smbus_data data;
+	struct i2c_msg msg;
+	u8 buf[3];
+
+	switch (mux->pdata.reg_size) {
+	case 1:
+		data.byte = val;
 		return __i2c_smbus_xfer(adap, client->addr, client->flags,
-				I2C_SMBUS_WRITE, pdata->sel_reg_addr,
+					I2C_SMBUS_WRITE, mux->pdata.sel_reg_addr,
 					I2C_SMBUS_BYTE_DATA, &data);
+	case 2:
+		buf[0] = mux->pdata.sel_reg_addr >> 8;
+		buf[1] = mux->pdata.sel_reg_addr;
+		buf[2] = val;
+		msg.addr = client->addr;
+		msg.buf = buf;
+		msg.len = mux->pdata.reg_size + 1;
+		msg.flags = 0;
+		return __i2c_transfer(adap, &msg, 1);
+	default:
+		return -EINVAL;
+	}
 }
 
 static int mlxcpld_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
 {
-	struct mlxcpld_mux *data = i2c_mux_priv(muxc);
-	struct i2c_client *client = data->client;
-	u8 regval = chan + 1;
+	struct mlxcpld_mux *mux = i2c_mux_priv(muxc);
+	u32 regval = chan;
 	int err = 0;
 
+	if (mux->pdata.reg_size == 1)
+		regval += 1;
+
 	/* Only select the channel if its different from the last channel */
-	if (data->last_chan != regval) {
-		err = mlxcpld_mux_reg_write(muxc->parent, client, regval);
-		data->last_chan = err < 0 ? 0 : regval;
+	if (mux->last_val != regval) {
+		err = mlxcpld_mux_reg_write(muxc->parent, mux, regval);
+		mux->last_val = err < 0 ? -1 : regval;
 	}
 
 	return err;
@@ -119,56 +105,64 @@ static int mlxcpld_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
 
 static int mlxcpld_mux_deselect(struct i2c_mux_core *muxc, u32 chan)
 {
-	struct mlxcpld_mux *data = i2c_mux_priv(muxc);
-	struct i2c_client *client = data->client;
+	struct mlxcpld_mux *mux = i2c_mux_priv(muxc);
 
 	/* Deselect active channel */
-	data->last_chan = 0;
+	mux->last_val = -1;
 
-	return mlxcpld_mux_reg_write(muxc->parent, client, data->last_chan);
+	return mlxcpld_mux_reg_write(muxc->parent, mux, 0);
 }
 
 /* Probe/reomove functions */
-static int mlxcpld_mux_probe(struct i2c_client *client,
-			     const struct i2c_device_id *id)
+static int mlxcpld_mux_probe(struct platform_device *pdev)
 {
-	struct i2c_adapter *adap = client->adapter;
-	struct mlxcpld_mux_plat_data *pdata = dev_get_platdata(&client->dev);
+	struct mlxcpld_mux_plat_data *pdata = dev_get_platdata(&pdev->dev);
+	struct i2c_client *client = to_i2c_client(pdev->dev.parent);
 	struct i2c_mux_core *muxc;
-	int num, force;
 	struct mlxcpld_mux *data;
-	int err;
+	int num, err;
+	u32 func;
 
 	if (!pdata)
 		return -EINVAL;
 
-	if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
+	switch (pdata->reg_size) {
+	case 1:
+		func = I2C_FUNC_SMBUS_WRITE_BYTE_DATA;
+		break;
+	case 2:
+		func = I2C_FUNC_I2C;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (!i2c_check_functionality(client->adapter, func))
 		return -ENODEV;
 
-	muxc = i2c_mux_alloc(adap, &client->dev, CPLD_MUX_MAX_NCHANS,
+	muxc = i2c_mux_alloc(client->adapter, &pdev->dev, pdata->num_adaps,
 			     sizeof(*data), 0, mlxcpld_mux_select_chan,
 			     mlxcpld_mux_deselect);
 	if (!muxc)
 		return -ENOMEM;
 
+	platform_set_drvdata(pdev, muxc);
 	data = i2c_mux_priv(muxc);
-	i2c_set_clientdata(client, muxc);
 	data->client = client;
-	data->last_chan = 0; /* force the first selection */
+	memcpy(&data->pdata, pdata, sizeof(*pdata));
+	data->last_val = -1; /* force the first selection */
 
 	/* Create an adapter for each channel. */
-	for (num = 0; num < CPLD_MUX_MAX_NCHANS; num++) {
-		if (num >= pdata->num_adaps)
-			/* discard unconfigured channels */
-			break;
-
-		force = pdata->adap_ids[num];
-
-		err = i2c_mux_add_adapter(muxc, force, num, 0);
+	for (num = 0; num < pdata->num_adaps; num++) {
+		err = i2c_mux_add_adapter(muxc, 0, pdata->chan_ids[num], 0);
 		if (err)
 			goto virt_reg_failed;
 	}
 
+	/* Notify caller when all channels' adapters are created. */
+	if (pdata->completion_notify)
+		pdata->completion_notify(pdata->handle, muxc->parent, muxc->adapter);
+
 	return 0;
 
 virt_reg_failed:
@@ -176,24 +170,23 @@ static int mlxcpld_mux_probe(struct i2c_client *client,
 	return err;
 }
 
-static int mlxcpld_mux_remove(struct i2c_client *client)
+static int mlxcpld_mux_remove(struct platform_device *pdev)
 {
-	struct i2c_mux_core *muxc = i2c_get_clientdata(client);
+	struct i2c_mux_core *muxc = platform_get_drvdata(pdev);
 
 	i2c_mux_del_adapters(muxc);
 	return 0;
 }
 
-static struct i2c_driver mlxcpld_mux_driver = {
+static struct platform_driver mlxcpld_mux_driver = {
 	.driver = {
-		.name	= "mlxcpld-mux",
+		.name = "i2c-mux-mlxcpld",
 	},
 	.probe = mlxcpld_mux_probe,
 	.remove = mlxcpld_mux_remove,
-	.id_table	= mlxcpld_mux_id,
 };
 
-module_i2c_driver(mlxcpld_mux_driver);
+module_platform_driver(mlxcpld_mux_driver);
 
 MODULE_AUTHOR("Michael Shych (michaels@mellanox.com)");
 MODULE_DESCRIPTION("Mellanox I2C-CPLD-MUX driver");

include/linux/platform_data/mlxcpld.h

+/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
+/*
+ * Mellanox I2C multiplexer support in CPLD
+ *
+ * Copyright (C) 2016-2020 Mellanox Technologies
+ */
+
+#ifndef _LINUX_I2C_MLXCPLD_H
+#define _LINUX_I2C_MLXCPLD_H
+
+/* Platform data for the CPLD I2C multiplexers */
+
+/* mlxcpld_mux_plat_data - per mux data, used with i2c_register_board_info
+ * @chan_ids - channels array
+ * @num_adaps - number of adapters
+ * @sel_reg_addr - mux select register offset in CPLD space
+ * @reg_size: register size in bytes
+ * @handle: handle to be passed by callback
+ * @completion_notify: callback to notify when all the adapters are created
+ */
+struct mlxcpld_mux_plat_data {
+	int *chan_ids;
+	int num_adaps;
+	int sel_reg_addr;
+	u8 reg_size;
+	void *handle;
+	int (*completion_notify)(void *handle, struct i2c_adapter *parent,
+				 struct i2c_adapter *adapters[]);
+};
+
+#endif /* _LINUX_I2C_MLXCPLD_H */

include/linux/platform_data/x86/mlxcpld.h

-/*
- * mlxcpld.h - Mellanox I2C multiplexer support in CPLD
- *
- * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
- * Copyright (c) 2016 Michael Shych <michaels@mellanox.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the names of the copyright holders nor the names of its
- *    contributors may be used to endorse or promote products derived from
- *    this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _LINUX_I2C_MLXCPLD_H
-#define _LINUX_I2C_MLXCPLD_H
-
-/* Platform data for the CPLD I2C multiplexers */
-
-/* mlxcpld_mux_plat_data - per mux data, used with i2c_register_board_info
- * @adap_ids - adapter array
- * @num_adaps - number of adapters
- * @sel_reg_addr - mux select register offset in CPLD space
- */
-struct mlxcpld_mux_plat_data {
-	int *adap_ids;
-	int num_adaps;
-	int sel_reg_addr;
-};
-
-#endif /* _LINUX_I2C_MLXCPLD_H */

include/uapi/linux/i2c-dev.h

 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
-    i2c-dev.h - i2c-bus driver, char device interface
-
-    Copyright (C) 1995-97 Simon G. Vogl
-    Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
-    MA 02110-1301 USA.
-*/
+ * i2c-dev.h - I2C bus char device interface
+ *
+ * Copyright (C) 1995-97 Simon G. Vogl
+ * Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
+ */
 
 #ifndef _UAPI_LINUX_I2C_DEV_H
 #define _UAPI_LINUX_I2C_DEV_H