Merge tag 'drivers_soc_for_5.10' of...

Merge tag 'drivers_soc_for_5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into arm/drivers

ARM: soc: TI driver updates for v5.10

Consist of:
 - Add Ring accelerator support for AM65x
 - Add TI PRUSS platform driver and enable it on available platforms
 - Extend PRUSS driver for CORECLK_MUX/IEPCLK_MUX support
 - UDMA rx ring pair fix
 - Add socinfo entry for J7200

* tag 'drivers_soc_for_5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone:
  Add missing '#' to fix schema errors:
  soc: ti: Convert to DEFINE_SHOW_ATTRIBUTE
  dmaengine: ti: k3-udma-glue: Fix parameters for rx ring pair request
  soc: ti: k3-socinfo: Add entry for J7200
  soc: ti: pruss: support CORECLK_MUX and IEPCLK_MUX
  dt-bindings: soc: ti: Update TI PRUSS bindings regarding clock-muxes
  firmware: ti_sci: allow frequency change for disabled clocks by default
  soc: ti: ti_sci_pm_domains: switch to use multiple genpds instead of one
  soc: ti: pruss: Enable support for ICSSG subsystems on K3 J721E SoCs
  soc: ti: pruss: Enable support for ICSSG subsystems on K3 AM65x SoCs
  soc: ti: pruss: Add support for PRU-ICSS subsystems on 66AK2G SoC
  soc: ti: pruss: Add support for PRU-ICSS subsystems on AM57xx SoCs
  soc: ti: pruss: Add support for PRU-ICSSs on AM437x SoCs
  soc: ti: pruss: Add a platform driver for PRUSS in TI SoCs
  dt-bindings: soc: ti: Add TI PRUSS bindings
  bindings: soc: ti: soc: ringacc: remove ti,dma-ring-reset-quirk
  soc: ti: k3: ringacc: add am65x sr2.0 support

Link: https://lore.kernel.org/r/1600656828-29267-1-git-send-email-santosh.shilimkar@oracle.comSigned-off-by: Olof Johansson <olof@lixom.net>

Documentation/devicetree/bindings/soc/ti/k3-ringacc.yaml

@@ -62,11 +62,6 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: TI-SCI device id of the ring accelerator
 
-  ti,dma-ring-reset-quirk:
-    $ref: /schemas/types.yaml#definitions/flag
-    description: |
-      enable ringacc/udma ring state interoperability issue software w/a
-
 required:
   - compatible
   - reg
@@ -94,7 +89,6 @@ examples:
             reg-names = "rt", "fifos", "proxy_gcfg", "proxy_target";
             ti,num-rings = <818>;
             ti,sci-rm-range-gp-rings = <0x2>; /* GP ring range */
-            ti,dma-ring-reset-quirk;
             ti,sci = <&dmsc>;
             ti,sci-dev-id = <187>;
             msi-parent = <&inta_main_udmass>;

drivers/dma/ti/k3-udma-glue.c

@@ -579,8 +579,8 @@ static int k3_udma_glue_cfg_rx_flow(struct k3_udma_glue_rx_channel *rx_chn,
 
 	/* request and cfg rings */
 	ret =  k3_ringacc_request_rings_pair(rx_chn->common.ringacc,
-					     flow_cfg->ring_rxq_id,
 					     flow_cfg->ring_rxfdq0_id,
+					     flow_cfg->ring_rxq_id,
 					     &flow->ringrxfdq,
 					     &flow->ringrx);
 	if (ret) {

drivers/firmware/ti_sci.c

@@ -1124,7 +1124,8 @@ static int ti_sci_cmd_get_clock(const struct ti_sci_handle *handle, u32 dev_id,
 static int ti_sci_cmd_idle_clock(const struct ti_sci_handle *handle,
 				 u32 dev_id, u32 clk_id)
 {
-	return ti_sci_set_clock_state(handle, dev_id, clk_id, 0,
+	return ti_sci_set_clock_state(handle, dev_id, clk_id,
+				      MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE,
 				      MSG_CLOCK_SW_STATE_UNREQ);
 }
 
@@ -1143,7 +1144,8 @@ static int ti_sci_cmd_idle_clock(const struct ti_sci_handle *handle,
 static int ti_sci_cmd_put_clock(const struct ti_sci_handle *handle,
 				u32 dev_id, u32 clk_id)
 {
-	return ti_sci_set_clock_state(handle, dev_id, clk_id, 0,
+	return ti_sci_set_clock_state(handle, dev_id, clk_id,
+				      MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE,
 				      MSG_CLOCK_SW_STATE_AUTO);
 }
 

drivers/soc/ti/Kconfig

@@ -101,6 +101,17 @@ config TI_K3_SOCINFO
 	  platforms to provide information about the SoC family and
 	  variant to user space.
 
+config TI_PRUSS
+	tristate "TI PRU-ICSS Subsystem Platform drivers"
+	depends on SOC_AM33XX || SOC_AM43XX || SOC_DRA7XX || ARCH_KEYSTONE || ARCH_K3
+	select MFD_SYSCON
+	help
+	  TI PRU-ICSS Subsystem platform specific support.
+
+	  Say Y or M here to support the Programmable Realtime Unit (PRU)
+	  processors on various TI SoCs. It's safe to say N here if you're
+	  not interested in the PRU or if you are unsure.
+
 endif # SOC_TI
 
 config TI_SCI_INTA_MSI_DOMAIN

drivers/soc/ti/Makefile

@@ -12,3 +12,4 @@ obj-$(CONFIG_TI_SCI_PM_DOMAINS)		+= ti_sci_pm_domains.o
 obj-$(CONFIG_TI_SCI_INTA_MSI_DOMAIN)	+= ti_sci_inta_msi.o
 obj-$(CONFIG_TI_K3_RINGACC)		+= k3-ringacc.o
 obj-$(CONFIG_TI_K3_SOCINFO)		+= k3-socinfo.o
+obj-$(CONFIG_TI_PRUSS)			+= pruss.o

drivers/soc/ti/k3-ringacc.c

@@ -10,6 +10,7 @@
 #include <linux/init.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
+#include <linux/sys_soc.h>
 #include <linux/soc/ti/k3-ringacc.h>
 #include <linux/soc/ti/ti_sci_protocol.h>
 #include <linux/soc/ti/ti_sci_inta_msi.h>
@@ -208,6 +209,15 @@ struct k3_ringacc {
 	const struct k3_ringacc_ops *ops;
 };
 
+/**
+ * struct k3_ringacc - Rings accelerator SoC data
+ *
+ * @dma_ring_reset_quirk:  DMA reset w/a enable
+ */
+struct k3_ringacc_soc_data {
+	unsigned dma_ring_reset_quirk:1;
+};
+
 static long k3_ringacc_ring_get_fifo_pos(struct k3_ring *ring)
 {
 	return K3_RINGACC_FIFO_WINDOW_SIZE_BYTES -
@@ -1051,9 +1061,6 @@ static int k3_ringacc_probe_dt(struct k3_ringacc *ringacc)
 		return ret;
 	}
 
-	ringacc->dma_ring_reset_quirk =
-			of_property_read_bool(node, "ti,dma-ring-reset-quirk");
-
 	ringacc->tisci = ti_sci_get_by_phandle(node, "ti,sci");
 	if (IS_ERR(ringacc->tisci)) {
 		ret = PTR_ERR(ringacc->tisci);
@@ -1084,9 +1091,22 @@ static int k3_ringacc_probe_dt(struct k3_ringacc *ringacc)
 						 ringacc->rm_gp_range);
 }
 
+static const struct k3_ringacc_soc_data k3_ringacc_soc_data_sr1 = {
+	.dma_ring_reset_quirk = 1,
+};
+
+static const struct soc_device_attribute k3_ringacc_socinfo[] = {
+	{ .family = "AM65X",
+	  .revision = "SR1.0",
+	  .data = &k3_ringacc_soc_data_sr1
+	},
+	{/* sentinel */}
+};
+
 static int k3_ringacc_init(struct platform_device *pdev,
 			   struct k3_ringacc *ringacc)
 {
+	const struct soc_device_attribute *soc;
 	void __iomem *base_fifo, *base_rt;
 	struct device *dev = &pdev->dev;
 	struct resource *res;
@@ -1103,6 +1123,13 @@ static int k3_ringacc_init(struct platform_device *pdev,
 	if (ret)
 		return ret;
 
+	soc = soc_device_match(k3_ringacc_socinfo);
+	if (soc && soc->data) {
+		const struct k3_ringacc_soc_data *soc_data = soc->data;
+
+		ringacc->dma_ring_reset_quirk = soc_data->dma_ring_reset_quirk;
+	}
+
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rt");
 	base_rt = devm_ioremap_resource(dev, res);
 	if (IS_ERR(base_rt))

drivers/soc/ti/k3-socinfo.c

@@ -39,6 +39,7 @@ static const struct k3_soc_id {
 } k3_soc_ids[] = {
 	{ 0xBB5A, "AM65X" },
 	{ 0xBB64, "J721E" },
+	{ 0xBB6D, "J7200" },
 };
 
 static int

drivers/soc/ti/knav_dma.c

@@ -355,7 +355,7 @@ static void dma_debug_show_devices(struct seq_file *s,
 	}
 }
 
-static int dma_debug_show(struct seq_file *s, void *v)
+static int knav_dma_debug_show(struct seq_file *s, void *v)
 {
 	struct knav_dma_device *dma;
 
@@ -370,17 +370,7 @@ static int dma_debug_show(struct seq_file *s, void *v)
 	return 0;
 }
 
-static int knav_dma_debug_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, dma_debug_show, NULL);
-}
-
-static const struct file_operations knav_dma_debug_ops = {
-	.open		= knav_dma_debug_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(knav_dma_debug);
 
 static int of_channel_match_helper(struct device_node *np, const char *name,
 					const char **dma_instance)
@@ -778,7 +768,7 @@ static int knav_dma_probe(struct platform_device *pdev)
 	}
 
 	debugfs_create_file("knav_dma", S_IFREG | S_IRUGO, NULL, NULL,
-			    &knav_dma_debug_ops);
+			    &knav_dma_debug_fops);
 
 	device_ready = true;
 	return ret;

drivers/soc/ti/knav_qmss_queue.c

@@ -478,17 +478,7 @@ static int knav_queue_debug_show(struct seq_file *s, void *v)
 	return 0;
 }
 
-static int knav_queue_debug_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, knav_queue_debug_show, NULL);
-}
-
-static const struct file_operations knav_queue_debug_ops = {
-	.open		= knav_queue_debug_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(knav_queue_debug);
 
 static inline int knav_queue_pdsp_wait(u32 * __iomem addr, unsigned timeout,
 					u32 flags)
@@ -1878,7 +1868,7 @@ static int knav_queue_probe(struct platform_device *pdev)
 	}
 
 	debugfs_create_file("qmss", S_IFREG | S_IRUGO, NULL, NULL,
-			    &knav_queue_debug_ops);
+			    &knav_queue_debug_fops);
 	device_ready = true;
 	return 0;
 

drivers/soc/ti/pruss.c

+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * PRU-ICSS platform driver for various TI SoCs
+ *
+ * Copyright (C) 2014-2020 Texas Instruments Incorporated - http://www.ti.com/
+ * Author(s):
+ *	Suman Anna <s-anna@ti.com>
+ *	Andrew F. Davis <afd@ti.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/pruss_driver.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+/**
+ * struct pruss_private_data - PRUSS driver private data
+ * @has_no_sharedram: flag to indicate the absence of PRUSS Shared Data RAM
+ * @has_core_mux_clock: flag to indicate the presence of PRUSS core clock
+ */
+struct pruss_private_data {
+	bool has_no_sharedram;
+	bool has_core_mux_clock;
+};
+
+static void pruss_of_free_clk_provider(void *data)
+{
+	struct device_node *clk_mux_np = data;
+
+	of_clk_del_provider(clk_mux_np);
+	of_node_put(clk_mux_np);
+}
+
+static int pruss_clk_mux_setup(struct pruss *pruss, struct clk *clk_mux,
+			       char *mux_name, struct device_node *clks_np)
+{
+	struct device_node *clk_mux_np;
+	struct device *dev = pruss->dev;
+	char *clk_mux_name;
+	unsigned int num_parents;
+	const char **parent_names;
+	void __iomem *reg;
+	u32 reg_offset;
+	int ret;
+
+	clk_mux_np = of_get_child_by_name(clks_np, mux_name);
+	if (!clk_mux_np) {
+		dev_err(dev, "%pOF is missing its '%s' node\n", clks_np,
+			mux_name);
+		return -ENODEV;
+	}
+
+	num_parents = of_clk_get_parent_count(clk_mux_np);
+	if (num_parents < 1) {
+		dev_err(dev, "mux-clock %pOF must have parents\n", clk_mux_np);
+		ret = -EINVAL;
+		goto put_clk_mux_np;
+	}
+
+	parent_names = devm_kcalloc(dev, sizeof(*parent_names), num_parents,
+				    GFP_KERNEL);
+	if (!parent_names) {
+		ret = -ENOMEM;
+		goto put_clk_mux_np;
+	}
+
+	of_clk_parent_fill(clk_mux_np, parent_names, num_parents);
+
+	clk_mux_name = devm_kasprintf(dev, GFP_KERNEL, "%s.%pOFn",
+				      dev_name(dev), clk_mux_np);
+	if (!clk_mux_name) {
+		ret = -ENOMEM;
+		goto put_clk_mux_np;
+	}
+
+	ret = of_property_read_u32(clk_mux_np, "reg", &reg_offset);
+	if (ret)
+		goto put_clk_mux_np;
+
+	reg = pruss->cfg_base + reg_offset;
+
+	clk_mux = clk_register_mux(NULL, clk_mux_name, parent_names,
+				   num_parents, 0, reg, 0, 1, 0, NULL);
+	if (IS_ERR(clk_mux)) {
+		ret = PTR_ERR(clk_mux);
+		goto put_clk_mux_np;
+	}
+
+	ret = devm_add_action_or_reset(dev, (void(*)(void *))clk_unregister_mux,
+				       clk_mux);
+	if (ret) {
+		dev_err(dev, "failed to add clkmux unregister action %d", ret);
+		goto put_clk_mux_np;
+	}
+
+	ret = of_clk_add_provider(clk_mux_np, of_clk_src_simple_get, clk_mux);
+	if (ret)
+		goto put_clk_mux_np;
+
+	ret = devm_add_action_or_reset(dev, pruss_of_free_clk_provider,
+				       clk_mux_np);
+	if (ret) {
+		dev_err(dev, "failed to add clkmux free action %d", ret);
+		goto put_clk_mux_np;
+	}
+
+	return 0;
+
+put_clk_mux_np:
+	of_node_put(clk_mux_np);
+	return ret;
+}
+
+static int pruss_clk_init(struct pruss *pruss, struct device_node *cfg_node)
+{
+	const struct pruss_private_data *data;
+	struct device_node *clks_np;
+	struct device *dev = pruss->dev;
+	int ret = 0;
+
+	data = of_device_get_match_data(dev);
+	if (IS_ERR(data))
+		return -ENODEV;
+
+	clks_np = of_get_child_by_name(cfg_node, "clocks");
+	if (!clks_np) {
+		dev_err(dev, "%pOF is missing its 'clocks' node\n", clks_np);
+		return -ENODEV;
+	}
+
+	if (data && data->has_core_mux_clock) {
+		ret = pruss_clk_mux_setup(pruss, pruss->core_clk_mux,
+					  "coreclk-mux", clks_np);
+		if (ret) {
+			dev_err(dev, "failed to setup coreclk-mux\n");
+			goto put_clks_node;
+		}
+	}
+
+	ret = pruss_clk_mux_setup(pruss, pruss->iep_clk_mux, "iepclk-mux",
+				  clks_np);
+	if (ret) {
+		dev_err(dev, "failed to setup iepclk-mux\n");
+		goto put_clks_node;
+	}
+
+put_clks_node:
+	of_node_put(clks_np);
+
+	return ret;
+}
+
+static struct regmap_config regmap_conf = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+};
+
+static int pruss_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev_of_node(dev);
+	struct device_node *child;
+	struct pruss *pruss;
+	struct resource res;
+	int ret, i, index;
+	const struct pruss_private_data *data;
+	const char *mem_names[PRUSS_MEM_MAX] = { "dram0", "dram1", "shrdram2" };
+
+	data = of_device_get_match_data(&pdev->dev);
+	if (IS_ERR(data)) {
+		dev_err(dev, "missing private data\n");
+		return -ENODEV;
+	}
+
+	ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+	if (ret) {
+		dev_err(dev, "failed to set the DMA coherent mask");
+		return ret;
+	}
+
+	pruss = devm_kzalloc(dev, sizeof(*pruss), GFP_KERNEL);
+	if (!pruss)
+		return -ENOMEM;
+
+	pruss->dev = dev;
+
+	child = of_get_child_by_name(np, "memories");
+	if (!child) {
+		dev_err(dev, "%pOF is missing its 'memories' node\n", child);
+		return -ENODEV;
+	}
+
+	for (i = 0; i < PRUSS_MEM_MAX; i++) {
+		/*
+		 * On AM437x one of two PRUSS units don't contain Shared RAM,
+		 * skip it
+		 */
+		if (data && data->has_no_sharedram && i == PRUSS_MEM_SHRD_RAM2)
+			continue;
+
+		index = of_property_match_string(child, "reg-names",
+						 mem_names[i]);
+		if (index < 0) {
+			of_node_put(child);
+			return index;
+		}
+
+		if (of_address_to_resource(child, index, &res)) {
+			of_node_put(child);
+			return -EINVAL;
+		}
+
+		pruss->mem_regions[i].va = devm_ioremap(dev, res.start,
+							resource_size(&res));
+		if (!pruss->mem_regions[i].va) {
+			dev_err(dev, "failed to parse and map memory resource %d %s\n",
+				i, mem_names[i]);
+			of_node_put(child);
+			return -ENOMEM;
+		}
+		pruss->mem_regions[i].pa = res.start;
+		pruss->mem_regions[i].size = resource_size(&res);
+
+		dev_dbg(dev, "memory %8s: pa %pa size 0x%zx va %pK\n",
+			mem_names[i], &pruss->mem_regions[i].pa,
+			pruss->mem_regions[i].size, pruss->mem_regions[i].va);
+	}
+	of_node_put(child);
+
+	platform_set_drvdata(pdev, pruss);
+
+	pm_runtime_enable(dev);
+	ret = pm_runtime_get_sync(dev);
+	if (ret < 0) {
+		dev_err(dev, "couldn't enable module\n");
+		pm_runtime_put_noidle(dev);
+		goto rpm_disable;
+	}
+
+	child = of_get_child_by_name(np, "cfg");
+	if (!child) {
+		dev_err(dev, "%pOF is missing its 'cfg' node\n", child);
+		ret = -ENODEV;
+		goto rpm_put;
+	}
+
+	if (of_address_to_resource(child, 0, &res)) {
+		ret = -ENOMEM;
+		goto node_put;
+	}
+
+	pruss->cfg_base = devm_ioremap(dev, res.start, resource_size(&res));
+	if (!pruss->cfg_base) {
+		ret = -ENOMEM;
+		goto node_put;
+	}
+
+	regmap_conf.name = kasprintf(GFP_KERNEL, "%pOFn@%llx", child,
+				     (u64)res.start);
+	regmap_conf.max_register = resource_size(&res) - 4;
+
+	pruss->cfg_regmap = devm_regmap_init_mmio(dev, pruss->cfg_base,
+						  &regmap_conf);
+	kfree(regmap_conf.name);
+	if (IS_ERR(pruss->cfg_regmap)) {
+		dev_err(dev, "regmap_init_mmio failed for cfg, ret = %ld\n",
+			PTR_ERR(pruss->cfg_regmap));
+		ret = PTR_ERR(pruss->cfg_regmap);
+		goto node_put;
+	}
+
+	ret = pruss_clk_init(pruss, child);
+	if (ret) {
+		dev_err(dev, "failed to setup coreclk-mux\n");
+		goto node_put;
+	}
+
+	ret = devm_of_platform_populate(dev);
+	if (ret) {
+		dev_err(dev, "failed to register child devices\n");
+		goto node_put;
+	}
+
+	of_node_put(child);
+
+	return 0;
+
+node_put:
+	of_node_put(child);
+rpm_put:
+	pm_runtime_put_sync(dev);
+rpm_disable:
+	pm_runtime_disable(dev);
+	return ret;
+}
+
+static int pruss_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+
+	devm_of_platform_depopulate(dev);
+
+	pm_runtime_put_sync(dev);
+	pm_runtime_disable(dev);
+
+	return 0;
+}
+
+/* instance-specific driver private data */
+static const struct pruss_private_data am437x_pruss1_data = {
+	.has_no_sharedram = false,
+};
+
+static const struct pruss_private_data am437x_pruss0_data = {
+	.has_no_sharedram = true,
+};
+
+static const struct pruss_private_data am65x_j721e_pruss_data = {
+	.has_core_mux_clock = true,
+};
+
+static const struct of_device_id pruss_of_match[] = {
+	{ .compatible = "ti,am3356-pruss" },
+	{ .compatible = "ti,am4376-pruss0", .data = &am437x_pruss0_data, },
+	{ .compatible = "ti,am4376-pruss1", .data = &am437x_pruss1_data, },
+	{ .compatible = "ti,am5728-pruss" },
+	{ .compatible = "ti,k2g-pruss" },
+	{ .compatible = "ti,am654-icssg", .data = &am65x_j721e_pruss_data, },
+	{ .compatible = "ti,j721e-icssg", .data = &am65x_j721e_pruss_data, },
+	{},
+};
+MODULE_DEVICE_TABLE(of, pruss_of_match);
+
+static struct platform_driver pruss_driver = {
+	.driver = {
+		.name = "pruss",
+		.of_match_table = pruss_of_match,
+	},
+	.probe  = pruss_probe,
+	.remove = pruss_remove,
+};
+module_platform_driver(pruss_driver);
+
+MODULE_AUTHOR("Suman Anna <s-anna@ti.com>");
+MODULE_DESCRIPTION("PRU-ICSS Subsystem Driver");
+MODULE_LICENSE("GPL v2");

drivers/soc/ti/ti_sci_pm_domains.c

@@ -9,7 +9,6 @@
 
 #include <linux/err.h>
 #include <linux/module.h>
-#include <linux/mutex.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
@@ -18,150 +17,95 @@
 #include <dt-bindings/soc/ti,sci_pm_domain.h>
 
 /**
- * struct ti_sci_genpd_dev_data: holds data needed for every device attached
- *				 to this genpd
- * @idx: index of the device that identifies it with the system
- *	 control processor.
- * @exclusive: Permissions for exclusive request or shared request of the
- *	       device.
+ * struct ti_sci_genpd_provider: holds common TI SCI genpd provider data
+ * @ti_sci: handle to TI SCI protocol driver that provides ops to
+ *	    communicate with system control processor.
+ * @dev: pointer to dev for the driver for devm allocs
+ * @pd_list: list of all the power domains on the device
+ * @data: onecell data for genpd core
  */
-struct ti_sci_genpd_dev_data {
-	int idx;
-	u8 exclusive;
+struct ti_sci_genpd_provider {
+	const struct ti_sci_handle *ti_sci;
+	struct device *dev;
+	struct list_head pd_list;
+	struct genpd_onecell_data data;
 };
 
 /**
  * struct ti_sci_pm_domain: TI specific data needed for power domain
- * @ti_sci: handle to TI SCI protocol driver that provides ops to
- *	    communicate with system control processor.
- * @dev: pointer to dev for the driver for devm allocs
+ * @idx: index of the device that identifies it with the system
+ *	 control processor.
+ * @exclusive: Permissions for exclusive request or shared request of the
+ *	       device.
  * @pd: generic_pm_domain for use with the genpd framework
+ * @node: link for the genpd list
+ * @parent: link to the parent TI SCI genpd provider
  */
 struct ti_sci_pm_domain {
-	const struct ti_sci_handle *ti_sci;
-	struct device *dev;
+	int idx;
+	u8 exclusive;
 	struct generic_pm_domain pd;
+	struct list_head node;
+	struct ti_sci_genpd_provider *parent;
 };
 
 #define genpd_to_ti_sci_pd(gpd) container_of(gpd, struct ti_sci_pm_domain, pd)
 
-/**
- * ti_sci_dev_id(): get prepopulated ti_sci id from struct dev
- * @dev: pointer to device associated with this genpd
- *
- * Returns device_id stored from ti,sci_id property
- */
-static int ti_sci_dev_id(struct device *dev)
-{
-	struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev);
-	struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data;
-
-	return sci_dev_data->idx;
-}
-
-static u8 is_ti_sci_dev_exclusive(struct device *dev)
-{
-	struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev);
-	struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data;
-
-	return sci_dev_data->exclusive;
-}
-
-/**
- * ti_sci_dev_to_sci_handle(): get pointer to ti_sci_handle
- * @dev: pointer to device associated with this genpd
- *
- * Returns ti_sci_handle to be used to communicate with system
- *	   control processor.
+/*
+ * ti_sci_pd_power_off(): genpd power down hook
+ * @domain: pointer to the powerdomain to power off
  */
-static const struct ti_sci_handle *ti_sci_dev_to_sci_handle(struct device *dev)
+static int ti_sci_pd_power_off(struct generic_pm_domain *domain)
 {
-	struct generic_pm_domain *pd = pd_to_genpd(dev->pm_domain);
-	struct ti_sci_pm_domain *ti_sci_genpd = genpd_to_ti_sci_pd(pd);
+	struct ti_sci_pm_domain *pd = genpd_to_ti_sci_pd(domain);
+	const struct ti_sci_handle *ti_sci = pd->parent->ti_sci;
 
-	return ti_sci_genpd->ti_sci;
+	return ti_sci->ops.dev_ops.put_device(ti_sci, pd->idx);
 }
 
-/**
- * ti_sci_dev_start(): genpd device start hook called to turn device on
- * @dev: pointer to device associated with this genpd to be powered on
+/*
+ * ti_sci_pd_power_on(): genpd power up hook
+ * @domain: pointer to the powerdomain to power on
  */
-static int ti_sci_dev_start(struct device *dev)
+static int ti_sci_pd_power_on(struct generic_pm_domain *domain)
 {
-	const struct ti_sci_handle *ti_sci = ti_sci_dev_to_sci_handle(dev);
-	int idx = ti_sci_dev_id(dev);
+	struct ti_sci_pm_domain *pd = genpd_to_ti_sci_pd(domain);
+	const struct ti_sci_handle *ti_sci = pd->parent->ti_sci;
 
-	if (is_ti_sci_dev_exclusive(dev))
-		return ti_sci->ops.dev_ops.get_device_exclusive(ti_sci, idx);
+	if (pd->exclusive)
+		return ti_sci->ops.dev_ops.get_device_exclusive(ti_sci,
+								pd->idx);
 	else
-		return ti_sci->ops.dev_ops.get_device(ti_sci, idx);
+		return ti_sci->ops.dev_ops.get_device(ti_sci, pd->idx);
 }
 
-/**
- * ti_sci_dev_stop(): genpd device stop hook called to turn device off
- * @dev: pointer to device associated with this genpd to be powered off
+/*
+ * ti_sci_pd_xlate(): translation service for TI SCI genpds
+ * @genpdspec: DT identification data for the genpd
+ * @data: genpd core data for all the powerdomains on the device
  */
-static int ti_sci_dev_stop(struct device *dev)
+static struct generic_pm_domain *ti_sci_pd_xlate(
+					struct of_phandle_args *genpdspec,
+					void *data)
 {
-	const struct ti_sci_handle *ti_sci = ti_sci_dev_to_sci_handle(dev);
-	int idx = ti_sci_dev_id(dev);
-
-	return ti_sci->ops.dev_ops.put_device(ti_sci, idx);
-}
-
-static int ti_sci_pd_attach_dev(struct generic_pm_domain *domain,
-				struct device *dev)
-{
-	struct device_node *np = dev->of_node;
-	struct of_phandle_args pd_args;
-	struct ti_sci_pm_domain *ti_sci_genpd = genpd_to_ti_sci_pd(domain);
-	const struct ti_sci_handle *ti_sci = ti_sci_genpd->ti_sci;
-	struct ti_sci_genpd_dev_data *sci_dev_data;
-	struct generic_pm_domain_data *genpd_data;
-	int idx, ret = 0;
-
-	ret = of_parse_phandle_with_args(np, "power-domains",
-					 "#power-domain-cells", 0, &pd_args);
-	if (ret < 0)
-		return ret;
-
-	if (pd_args.args_count != 1 && pd_args.args_count != 2)
-		return -EINVAL;
-
-	idx = pd_args.args[0];
-
-	/*
-	 * Check the validity of the requested idx, if the index is not valid
-	 * the PMMC will return a NAK here and we will not allocate it.
-	 */
-	ret = ti_sci->ops.dev_ops.is_valid(ti_sci, idx);
-	if (ret)
-		return -EINVAL;
+	struct genpd_onecell_data *genpd_data = data;
+	unsigned int idx = genpdspec->args[0];
 
-	sci_dev_data = kzalloc(sizeof(*sci_dev_data), GFP_KERNEL);
-	if (!sci_dev_data)
-		return -ENOMEM;
+	if (genpdspec->args_count < 2)
+		return ERR_PTR(-EINVAL);
 
-	sci_dev_data->idx = idx;
-	/* Enable the exclusive permissions by default */
-	sci_dev_data->exclusive = TI_SCI_PD_EXCLUSIVE;
-	if (pd_args.args_count == 2)
-		sci_dev_data->exclusive = pd_args.args[1] & 0x1;
+	if (idx >= genpd_data->num_domains) {
+		pr_err("%s: invalid domain index %u\n", __func__, idx);
+		return ERR_PTR(-EINVAL);
+	}
 
-	genpd_data = dev_gpd_data(dev);
-	genpd_data->data = sci_dev_data;
+	if (!genpd_data->domains[idx])
+		return ERR_PTR(-ENOENT);
 
-	return 0;
-}
-
-static void ti_sci_pd_detach_dev(struct generic_pm_domain *domain,
-				 struct device *dev)
-{
-	struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev);
-	struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data;
+	genpd_to_ti_sci_pd(genpd_data->domains[idx])->exclusive =
+		genpdspec->args[1];
 
-	kfree(sci_dev_data);
-	genpd_data->data = NULL;
+	return genpd_data->domains[idx];
 }
 
 static const struct of_device_id ti_sci_pm_domain_matches[] = {
@@ -173,33 +117,80 @@ MODULE_DEVICE_TABLE(of, ti_sci_pm_domain_matches);
 static int ti_sci_pm_domain_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	struct ti_sci_pm_domain *ti_sci_pd;
+	struct ti_sci_genpd_provider *pd_provider;
+	struct ti_sci_pm_domain *pd;
+	struct device_node *np = NULL;
+	struct of_phandle_args args;
 	int ret;
+	u32 max_id = 0;
+	int index;
 
-	ti_sci_pd = devm_kzalloc(dev, sizeof(*ti_sci_pd), GFP_KERNEL);
-	if (!ti_sci_pd)
+	pd_provider = devm_kzalloc(dev, sizeof(*pd_provider), GFP_KERNEL);
+	if (!pd_provider)
 		return -ENOMEM;
 
-	ti_sci_pd->ti_sci = devm_ti_sci_get_handle(dev);
-	if (IS_ERR(ti_sci_pd->ti_sci))
-		return PTR_ERR(ti_sci_pd->ti_sci);
+	pd_provider->ti_sci = devm_ti_sci_get_handle(dev);
+	if (IS_ERR(pd_provider->ti_sci))
+		return PTR_ERR(pd_provider->ti_sci);
+
+	pd_provider->dev = dev;
+
+	INIT_LIST_HEAD(&pd_provider->pd_list);
+
+	/* Find highest device ID used for power domains */
+	while (1) {
+		np = of_find_node_with_property(np, "power-domains");
+		if (!np)
+			break;
+
+		index = 0;
+
+		while (1) {
+			ret = of_parse_phandle_with_args(np, "power-domains",
+							 "#power-domain-cells",
+							 index, &args);
+			if (ret)
+				break;
+
+			if (args.args_count >= 1 && args.np == dev->of_node) {
+				if (args.args[0] > max_id)
+					max_id = args.args[0];
+
+				pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
+				if (!pd)
+					return -ENOMEM;
+
+				pd->pd.name = devm_kasprintf(dev, GFP_KERNEL,
+							     "pd:%d",
+							     args.args[0]);
+				if (!pd->pd.name)
+					return -ENOMEM;
 
-	ti_sci_pd->dev = dev;
+				pd->pd.power_off = ti_sci_pd_power_off;
+				pd->pd.power_on = ti_sci_pd_power_on;
+				pd->idx = args.args[0];
+				pd->parent = pd_provider;
 
-	ti_sci_pd->pd.name = "ti_sci_pd";
+				pm_genpd_init(&pd->pd, NULL, true);
 
-	ti_sci_pd->pd.attach_dev = ti_sci_pd_attach_dev;
-	ti_sci_pd->pd.detach_dev = ti_sci_pd_detach_dev;
+				list_add(&pd->node, &pd_provider->pd_list);
+			}
+			index++;
+		}
+	}
 
-	ti_sci_pd->pd.dev_ops.start = ti_sci_dev_start;
-	ti_sci_pd->pd.dev_ops.stop = ti_sci_dev_stop;
+	pd_provider->data.domains =
+		devm_kcalloc(dev, max_id + 1,
+			     sizeof(*pd_provider->data.domains),
+			     GFP_KERNEL);
 
-	pm_genpd_init(&ti_sci_pd->pd, NULL, true);
+	pd_provider->data.num_domains = max_id + 1;
+	pd_provider->data.xlate = ti_sci_pd_xlate;
 
-	ret = of_genpd_add_provider_simple(np, &ti_sci_pd->pd);
+	list_for_each_entry(pd, &pd_provider->pd_list, node)
+		pd_provider->data.domains[pd->idx] = &pd->pd;
 
-	return ret;
+	return of_genpd_add_provider_onecell(dev->of_node, &pd_provider->data);
 }
 
 static struct platform_driver ti_sci_pm_domains_driver = {

include/linux/pruss_driver.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * PRU-ICSS sub-system specific definitions
+ *
+ * Copyright (C) 2014-2020 Texas Instruments Incorporated - http://www.ti.com/
+ *	Suman Anna <s-anna@ti.com>
+ */
+
+#ifndef _PRUSS_DRIVER_H_
+#define _PRUSS_DRIVER_H_
+
+#include <linux/types.h>
+
+/*
+ * enum pruss_mem - PRUSS memory range identifiers
+ */
+enum pruss_mem {
+	PRUSS_MEM_DRAM0 = 0,
+	PRUSS_MEM_DRAM1,
+	PRUSS_MEM_SHRD_RAM2,
+	PRUSS_MEM_MAX,
+};
+
+/**
+ * struct pruss_mem_region - PRUSS memory region structure
+ * @va: kernel virtual address of the PRUSS memory region
+ * @pa: physical (bus) address of the PRUSS memory region
+ * @size: size of the PRUSS memory region
+ */
+struct pruss_mem_region {
+	void __iomem *va;
+	phys_addr_t pa;
+	size_t size;
+};
+
+/**
+ * struct pruss - PRUSS parent structure
+ * @dev: pruss device pointer
+ * @cfg_base: base iomap for CFG region
+ * @cfg_regmap: regmap for config region
+ * @mem_regions: data for each of the PRUSS memory regions
+ * @core_clk_mux: clk handle for PRUSS CORE_CLK_MUX
+ * @iep_clk_mux: clk handle for PRUSS IEP_CLK_MUX
+ */
+struct pruss {
+	struct device *dev;
+	void __iomem *cfg_base;
+	struct regmap *cfg_regmap;
+	struct pruss_mem_region mem_regions[PRUSS_MEM_MAX];
+	struct clk *core_clk_mux;
+	struct clk *iep_clk_mux;
+};
+
+#endif	/* _PRUSS_DRIVER_H_ */