Merge tag 'pef2256-framer' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Linus Walleij says:

====================
Immutable tag for the PEF2256 framer

* tag 'pef2256-framer' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  MAINTAINERS: Add the Lantiq PEF2256 driver entry
  pinctrl: Add support for the Lantic PEF2256 pinmux
  net: wan: framer: Add support for the Lantiq PEF2256 framer
  dt-bindings: net: Add the Lantiq PEF2256 E1/T1/J1 framer
  net: wan: Add framer framework support
====================

Link: https://lore.kernel.org/all/CACRpkdYT1J7noFUhObFgfA60XQAfL4rb=knEmWS__TKKtCMh7Q@mail.gmail.com/Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/lantiq,pef2256.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/lantiq,pef2256.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Lantiq PEF2256
+
+maintainers:
+  - Herve Codina <herve.codina@bootlin.com>
+
+description:
+  The Lantiq PEF2256, also known as Infineon PEF2256 or FALC56, is a framer and
+  line interface component designed to fulfill all required interfacing between
+  an analog E1/T1/J1 line and the digital PCM system highway/H.100 bus.
+
+properties:
+  compatible:
+    items:
+      - const: lantiq,pef2256
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Master Clock
+      - description: System Clock Receive
+      - description: System Clock Transmit
+
+  clock-names:
+    items:
+      - const: mclk
+      - const: sclkr
+      - const: sclkx
+
+  interrupts:
+    maxItems: 1
+
+  reset-gpios:
+    description:
+      GPIO used to reset the device.
+    maxItems: 1
+
+  pinctrl:
+    $ref: /schemas/pinctrl/pinctrl.yaml#
+    additionalProperties: false
+
+    patternProperties:
+      '-pins$':
+        type: object
+        $ref: /schemas/pinctrl/pinmux-node.yaml#
+        additionalProperties: false
+
+        properties:
+          pins:
+            enum: [ RPA, RPB, RPC, RPD, XPA, XPB, XPC, XPD ]
+
+          function:
+            enum: [ SYPR, RFM, RFMB, RSIGM, RSIG, DLR, FREEZE, RFSP, LOS,
+                    SYPX, XFMS, XSIG, TCLK, XMFB, XSIGM, DLX, XCLK, XLT,
+                    GPI, GPOH, GPOL ]
+
+        required:
+          - pins
+          - function
+
+  lantiq,data-rate-bps:
+    enum: [2048000, 4096000, 8192000, 16384000]
+    default: 2048000
+    description:
+      Data rate (bit per seconds) on the system highway.
+
+  lantiq,clock-falling-edge:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      Data is sent on falling edge of the clock (and received on the rising
+      edge). If 'clock-falling-edge' is not present, data is sent on the
+      rising edge (and received on the falling edge).
+
+  lantiq,channel-phase:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2, 3, 4, 5, 6, 7]
+    default: 0
+    description: |
+      The pef2256 delivers a full frame (32 8-bit time-slots in E1 and 24 8-bit
+      time-slots 8 8-bit signaling in E1/J1) every 125us. This lead to a data
+      rate of 2048000 bit/s. When lantiq,data-rate-bps is more than 2048000
+      bit/s, the data (all 32 8-bit) present in the frame are interleave with
+      unused time-slots. The lantiq,channel-phase property allows to set the
+      correct alignment of the interleave mechanism.
+      For instance, suppose lantiq,data-rate-bps = 8192000 (ie 4*2048000), and
+      lantiq,channel-phase = 2, the interleave schema with unused time-slots
+      (nu) and used time-slots (XX) for TSi is
+        nu nu XX nu nu nu XX nu nu nu XX nu
+        <-- TSi --> <- TSi+1 -> <- TSi+2 ->
+      With lantiq,data-rate-bps = 8192000, and lantiq,channel-phase = 1, the
+      interleave schema is
+        nu XX nu nu nu XX nu nu nu XX nu nu
+        <-- TSi --> <- TSi+1 -> <- TSi+2 ->
+      With lantiq,data-rate-bps = 4096000 (ie 2*2048000), and
+      lantiq,channel-phase = 1, the interleave schema is
+        nu    XX    nu    XX    nu    XX
+        <-- TSi --> <- TSi+1 -> <- TSi+2 ->
+
+patternProperties:
+  '^codec(-([0-9]|[1-2][0-9]|3[0-1]))?$':
+    type: object
+    $ref: /schemas/sound/dai-common.yaml
+    unevaluatedProperties: false
+    description:
+      Codec provided by the pef2256. This codec allows to use some of the PCM
+      system highway time-slots as audio channels to transport audio data over
+      the E1/T1/J1 lines.
+      The time-slots used by the codec must be set and so, the properties
+      'dai-tdm-slot-num', 'dai-tdm-slot-width', 'dai-tdm-slot-tx-mask' and
+      'dai-tdm-slot-rx-mask' must be present in the sound card node for
+      sub-nodes that involve the codec. The codec uses 8-bit time-slots.
+      'dai-tdm-tdm-slot-with' must be set to 8.
+      The tx and rx masks define the pef2256 time-slots assigned to the codec.
+
+    properties:
+      compatible:
+        const: lantiq,pef2256-codec
+
+      '#sound-dai-cells':
+        const: 0
+
+    required:
+      - compatible
+      - '#sound-dai-cells'
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    pef2256: framer@2000000 {
+      compatible = "lantiq,pef2256";
+      reg = <0x2000000 0x100>;
+      interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
+      interrupt-parent = <&intc>;
+      clocks = <&clk_mclk>, <&clk_sclkr>, <&clk_sclkx>;
+      clock-names = "mclk", "sclkr", "sclkx";
+      reset-gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+      lantiq,data-rate-bps = <4096000>;
+
+      pinctrl {
+        pef2256_rpa_sypr: rpa-pins {
+          pins = "RPA";
+          function = "SYPR";
+        };
+        pef2256_xpa_sypx: xpa-pins {
+          pins = "XPA";
+          function = "SYPX";
+        };
+      };
+
+      pef2256_codec0: codec-0 {
+        compatible = "lantiq,pef2256-codec";
+        #sound-dai-cells = <0>;
+        sound-name-prefix = "PEF2256_0";
+      };
+
+      pef2256_codec1: codec-1 {
+        compatible = "lantiq,pef2256-codec";
+        #sound-dai-cells = <0>;
+        sound-name-prefix = "PEF2256_1";
+      };
+    };
+
+    sound {
+      compatible = "simple-audio-card";
+      #address-cells = <1>;
+      #size-cells = <0>;
+      simple-audio-card,dai-link@0 { /* CPU DAI1 - pef2256 codec 1 */
+        reg = <0>;
+        cpu {
+          sound-dai = <&cpu_dai1>;
+        };
+        codec {
+          sound-dai = <&pef2256_codec0>;
+          dai-tdm-slot-num = <4>;
+          dai-tdm-slot-width = <8>;
+          /* TS 1, 2, 3, 4 */
+          dai-tdm-slot-tx-mask = <0 1 1 1 1>;
+          dai-tdm-slot-rx-mask = <0 1 1 1 1>;
+        };
+      };
+      simple-audio-card,dai-link@1 { /* CPU DAI2 - pef2256 codec 2 */
+        reg = <1>;
+        cpu {
+          sound-dai = <&cpu_dai2>;
+        };
+        codec {
+          sound-dai = <&pef2256_codec1>;
+          dai-tdm-slot-num = <4>;
+          dai-tdm-slot-width = <8>;
+          /* TS 5, 6, 7, 8 */
+          dai-tdm-slot-tx-mask = <0 0 0 0 0 1 1 1 1>;
+          dai-tdm-slot-rx-mask = <0 0 0 0 0 1 1 1 1>;
+        };
+      };
+    };

MAINTAINERS

@@ -12013,6 +12013,14 @@ S:	Maintained
 F:	arch/mips/lantiq
 F:	drivers/soc/lantiq
 
+LANTIQ PEF2256 DRIVER
+M:	Herve Codina <herve.codina@bootlin.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/net/lantiq,pef2256.yaml
+F:	drivers/net/wan/framer/pef2256/
+F:	drivers/pinctrl/pinctrl-pef2256.c
+F:	include/linux/framer/pef2256.h
+
 LASI 53c700 driver for PARISC
 M:	"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
 L:	linux-scsi@vger.kernel.org

drivers/net/wan/Kconfig

@@ -95,6 +95,8 @@ config HDLC_X25
 comment "X.25/LAPB support is disabled"
 	depends on HDLC && (LAPB!=m || HDLC!=m) && LAPB!=y
 
+source "drivers/net/wan/framer/Kconfig"
+
 config PCI200SYN
 	tristate "Goramo PCI200SYN support"
 	depends on HDLC && PCI

drivers/net/wan/Makefile

@@ -14,6 +14,8 @@ obj-$(CONFIG_HDLC_FR)		+= hdlc_fr.o
 obj-$(CONFIG_HDLC_PPP)		+= hdlc_ppp.o
 obj-$(CONFIG_HDLC_X25)		+= hdlc_x25.o
 
+obj-y				+= framer/
+
 obj-$(CONFIG_FARSYNC)		+= farsync.o
 
 obj-$(CONFIG_LAPBETHER)		+= lapbether.o

drivers/net/wan/framer/Kconfig

+# SPDX-License-Identifier: GPL-2.0-only
+#
+# FRAMER
+#
+
+menuconfig FRAMER
+	tristate "Framer Subsystem"
+	help
+	  A framer is a component in charge of an E1/T1 line interface.
+	  Connected usually to a TDM bus, it converts TDM frames to/from E1/T1
+	  frames. It also provides information related to the E1/T1 line.
+	  Used with HDLC, the network can be reached through the E1/T1 line.
+
+	  This framework is designed to provide a generic interface for framer
+	  devices present in the kernel. This layer will have the generic
+	  API by which framer drivers can create framer using the framer
+	  framework and framer users can obtain reference to the framer.
+	  All the users of this framework should select this config.
+
+if FRAMER
+
+config GENERIC_FRAMER
+	bool
+
+config FRAMER_PEF2256
+	tristate "Lantiq PEF2256"
+	depends on OF
+	depends on HAS_IOMEM
+	select GENERIC_FRAMER
+	select MFD_CORE
+	select REGMAP_MMIO
+	help
+	  Enable support for the Lantiq PEF2256 (FALC56) framer.
+	  The PEF2256 is a framer and line interface between analog E1/T1/J1
+	  line and a digital PCM bus.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called framer-pef2256.
+
+endif # FRAMER

drivers/net/wan/framer/Makefile

+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the framer drivers.
+#
+
+obj-$(CONFIG_GENERIC_FRAMER)			+= framer-core.o
+obj-$(CONFIG_FRAMER_PEF2256)			+= pef2256/

drivers/net/wan/framer/pef2256/Makefile

+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the pef2256 driver.
+#
+
+obj-$(CONFIG_FRAMER_PEF2256)		+= framer-pef2256.o
+
+framer-pef2256-objs	:= pef2256.o

drivers/net/wan/framer/pef2256/pef2256-regs.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * PEF2256 registers definition
+ *
+ * Copyright 2023 CS GROUP France
+ *
+ * Author: Herve Codina <herve.codina@bootlin.com>
+ */
+#ifndef __PEF2256_REGS_H__
+#define __PEF2256_REGS_H__
+
+#include "linux/bitfield.h"
+
+/* Command Register */
+#define PEF2256_CMDR		0x02
+#define PEF2256_CMDR_RRES	BIT(6)
+#define PEF2256_CMDR_XRES	BIT(4)
+#define PEF2256_CMDR_SRES	BIT(0)
+
+/* Interrupt Mask Register 0..5 */
+#define PEF2256_IMR0	        0x14
+#define PEF2256_IMR1	        0x15
+#define PEF2256_IMR2	        0x16
+#define PEF2256_IMR3	        0x17
+#define PEF2256_IMR4	        0x18
+#define PEF2256_IMR5	        0x19
+
+/* Framer Mode Register 0 */
+#define PEF2256_FMR0		0x1C
+#define PEF2256_FMR0_XC_MASK	GENMASK(7, 6)
+#define PEF2256_FMR0_XC_NRZ	FIELD_PREP_CONST(PEF2256_FMR0_XC_MASK, 0x0)
+#define PEF2256_FMR0_XC_CMI	FIELD_PREP_CONST(PEF2256_FMR0_XC_MASK, 0x1)
+#define PEF2256_FMR0_XC_AMI	FIELD_PREP_CONST(PEF2256_FMR0_XC_MASK, 0x2)
+#define PEF2256_FMR0_XC_HDB3	FIELD_PREP_CONST(PEF2256_FMR0_XC_MASK, 0x3)
+#define PEF2256_FMR0_RC_MASK	GENMASK(5, 4)
+#define PEF2256_FMR0_RC_NRZ	FIELD_PREP_CONST(PEF2256_FMR0_RC_MASK, 0x0)
+#define PEF2256_FMR0_RC_CMI	FIELD_PREP_CONST(PEF2256_FMR0_RC_MASK, 0x1)
+#define PEF2256_FMR0_RC_AMI	FIELD_PREP_CONST(PEF2256_FMR0_RC_MASK, 0x2)
+#define PEF2256_FMR0_RC_HDB3	FIELD_PREP_CONST(PEF2256_FMR0_RC_MASK, 0x3)
+
+/* Framer Mode Register 1 */
+#define PEF2256_FMR1		0x1D
+#define PEF2256_FMR1_XFS	BIT(3)
+#define PEF2256_FMR1_ECM	BIT(2)
+/* SSD is defined on 2 bits. The other bit is on SIC1 register */
+#define PEF2256_FMR1_SSD_MASK	GENMASK(1, 1)
+#define PEF2256_FMR1_SSD_2048	FIELD_PREP_CONST(PEF2256_FMR1_SSD_MASK, 0x0)
+#define PEF2256_FMR1_SSD_4096	FIELD_PREP_CONST(PEF2256_FMR1_SSD_MASK, 0x1)
+#define PEF2256_FMR1_SSD_8192	FIELD_PREP_CONST(PEF2256_FMR1_SSD_MASK, 0x0)
+#define PEF2256_FMR1_SSD_16384	FIELD_PREP_CONST(PEF2256_FMR1_SSD_MASK, 0x1)
+
+/* Framer Mode Register 2 */
+#define PEF2256_FMR2			  0x1E
+#define PEF2256_FMR2_RFS_MASK		  GENMASK(7, 6)
+#define PEF2256_FMR2_RFS_DOUBLEFRAME	  FIELD_PREP_CONST(PEF2256_FMR2_RFS_MASK, 0x0)
+#define PEF2256_FMR2_RFS_CRC4_MULTIFRAME  FIELD_PREP_CONST(PEF2256_FMR2_RFS_MASK, 0x2)
+#define PEF2256_FMR2_RFS_AUTO_MULTIFRAME  FIELD_PREP_CONST(PEF2256_FMR2_RFS_MASK, 0x3)
+#define PEF2256_FMR2_AXRA		  BIT(1)
+
+/* Transmit Service Word */
+#define PEF2256_XSW		0x20
+#define PEF2256_XSW_XSIS	BIT(7)
+#define PEF2256_XSW_XTM		BIT(6)
+#define PEF2256_XSW_XY_MASK	GENMASK(5, 0)
+#define PEF2256_XSW_XY(_v)	FIELD_PREP(PEF2256_XSW_XY_MASK, _v)
+
+/* Transmit Spare Bits */
+#define PEF2256_XSP	        0x21
+#define PEF2256_XSP_XSIF	BIT(2)
+
+/* Transmit Control 0..1 */
+#define PEF2256_XC0		0x22
+#define PEF2256_XC1		0x23
+
+/* Receive Control 0 */
+#define PEF2256_RC0		0x24
+#define PEF2256_RC0_SWD		BIT(7)
+#define PEF2256_RC0_ASY4	BIT(6)
+
+/* Receive Control 1 */
+#define PEF2256_RC1		0x25
+
+/* Transmit Pulse Mask 0..1 */
+#define PEF2256_XPM0		0x26
+#define PEF2256_XPM1		0x27
+
+/* Transmit Pulse Mask 2 */
+#define PEF2256_XPM2		0x28
+#define PEF2256_XPM2_XLT	BIT(6)
+
+/* Transparent Service Word Mask */
+#define PEF2256_TSWM		0x29
+
+/* Line Interface Mode 0 */
+#define PEF2256_LIM0		0x36
+#define PEF2256_2X_LIM0_BIT3	BIT(3) /* v2.x, described as a forced '1' bit */
+#define PEF2256_LIM0_MAS	BIT(0)
+
+/* Line Interface Mode 1 */
+#define PEF2256_LIM1		  0x37
+#define PEF2256_12_LIM1_RIL_MASK  GENMASK(6, 4)
+#define PEF2256_12_LIM1_RIL_910	  FIELD_PREP_CONST(PEF2256_12_LIM1_RIL_MASK, 0x0)
+#define PEF2256_12_LIM1_RIL_740	  FIELD_PREP_CONST(PEF2256_12_LIM1_RIL_MASK, 0x1)
+#define PEF2256_12_LIM1_RIL_590	  FIELD_PREP_CONST(PEF2256_12_LIM1_RIL_MASK, 0x2)
+#define PEF2256_12_LIM1_RIL_420	  FIELD_PREP_CONST(PEF2256_12_LIM1_RIL_MASK, 0x3)
+#define PEF2256_12_LIM1_RIL_320	  FIELD_PREP_CONST(PEF2256_12_LIM1_RIL_MASK, 0x4)
+#define PEF2256_12_LIM1_RIL_210	  FIELD_PREP_CONST(PEF2256_12_LIM1_RIL_MASK, 0x5)
+#define PEF2256_12_LIM1_RIL_160	  FIELD_PREP_CONST(PEF2256_12_LIM1_RIL_MASK, 0x6)
+#define PEF2256_12_LIM1_RIL_100	  FIELD_PREP_CONST(PEF2256_12_LIM1_RIL_MASK, 0x7)
+#define PEF2256_2X_LIM1_RIL_MASK  GENMASK(6, 4)
+#define PEF2256_2X_LIM1_RIL_2250  FIELD_PREP_CONST(PEF2256_2X_LIM1_RIL_MASK, 0x0)
+#define PEF2256_2X_LIM1_RIL_1100  FIELD_PREP_CONST(PEF2256_2X_LIM1_RIL_MASK, 0x1)
+#define PEF2256_2X_LIM1_RIL_600	  FIELD_PREP_CONST(PEF2256_2X_LIM1_RIL_MASK, 0x2)
+#define PEF2256_2X_LIM1_RIL_350	  FIELD_PREP_CONST(PEF2256_2X_LIM1_RIL_MASK, 0x3)
+#define PEF2256_2X_LIM1_RIL_210	  FIELD_PREP_CONST(PEF2256_2X_LIM1_RIL_MASK, 0x4)
+#define PEF2256_2X_LIM1_RIL_140	  FIELD_PREP_CONST(PEF2256_2X_LIM1_RIL_MASK, 0x5)
+#define PEF2256_2X_LIM1_RIL_100	  FIELD_PREP_CONST(PEF2256_2X_LIM1_RIL_MASK, 0x6)
+#define PEF2256_2X_LIM1_RIL_50	  FIELD_PREP_CONST(PEF2256_2X_LIM1_RIL_MASK, 0x7)
+
+/* Pulse Count Detection */
+#define PEF2256_PCD		0x38
+
+ /* Pulse Count Recovery */
+#define PEF2256_PCR		0x39
+
+ /* Line Interface Mode 2 */
+#define PEF2256_LIM2		0x3A
+#define PEF2256_LIM2_SLT_MASK	GENMASK(5, 4)
+#define PEF2256_LIM2_SLT_THR55	FIELD_PREP_CONST(PEF2256_LIM2_SLT_MASK, 0x0)
+#define PEF2256_LIM2_SLT_THR67	FIELD_PREP_CONST(PEF2256_LIM2_SLT_MASK, 0x1)
+#define PEF2256_LIM2_SLT_THR50	FIELD_PREP_CONST(PEF2256_LIM2_SLT_MASK, 0x2)
+#define PEF2256_LIM2_SLT_THR45	FIELD_PREP_CONST(PEF2256_LIM2_SLT_MASK, 0x3)
+#define PEF2256_LIM2_ELT	BIT(2)
+
+/* System Interface Control 1 */
+#define PEF2256_SIC1	          0x3E
+#define PEF2256_SIC1_SSC_MASK	  (BIT(7) |  BIT(3))
+#define PEF2256_SIC1_SSC_2048	  (0)
+#define PEF2256_SIC1_SSC_4096	  BIT(3)
+#define PEF2256_SIC1_SSC_8192	  BIT(7)
+#define PEF2256_SIC1_SSC_16384	  (BIT(7) |  BIT(3))
+/* SSD is defined on 2 bits. The other bit is on FMR1 register */
+#define PEF2256_SIC1_SSD_MASK	  GENMASK(6, 6)
+#define PEF2256_SIC1_SSD_2048	  FIELD_PREP_CONST(PEF2256_SIC1_SSD_MASK, 0x0)
+#define PEF2256_SIC1_SSD_4096	  FIELD_PREP_CONST(PEF2256_SIC1_SSD_MASK, 0x0)
+#define PEF2256_SIC1_SSD_8192	  FIELD_PREP_CONST(PEF2256_SIC1_SSD_MASK, 0x1)
+#define PEF2256_SIC1_SSD_16384	  FIELD_PREP_CONST(PEF2256_SIC1_SSD_MASK, 0x1)
+#define PEF2256_SIC1_RBS_MASK	  GENMASK(5, 4)
+#define PEF2256_SIC1_RBS_2FRAMES  FIELD_PREP_CONST(PEF2256_SIC1_RBS_MASK, 0x0)
+#define PEF2256_SIC1_RBS_1FRAME	  FIELD_PREP_CONST(PEF2256_SIC1_RBS_MASK, 0x1)
+#define PEF2256_SIC1_RBS_96BITS	  FIELD_PREP_CONST(PEF2256_SIC1_RBS_MASK, 0x2)
+#define PEF2256_SIC1_RBS_BYPASS	  FIELD_PREP_CONST(PEF2256_SIC1_RBS_MASK, 0x3)
+#define PEF2256_SIC1_XBS_MASK	  GENMASK(1, 0)
+#define PEF2256_SIC1_XBS_BYPASS	  FIELD_PREP_CONST(PEF2256_SIC1_XBS_MASK, 0x0)
+#define PEF2256_SIC1_XBS_1FRAME	  FIELD_PREP_CONST(PEF2256_SIC1_XBS_MASK, 0x1)
+#define PEF2256_SIC1_XBS_2FRAMES  FIELD_PREP_CONST(PEF2256_SIC1_XBS_MASK, 0x2)
+#define PEF2256_SIC1_XBS_96BITS	  FIELD_PREP_CONST(PEF2256_SIC1_XBS_MASK, 0x3)
+
+/* System Interface Control 2 */
+#define PEF2256_SIC2		0x3F
+#define PEF2256_SIC2_SICS_MASK	GENMASK(3, 1)
+#define PEF2256_SIC2_SICS(_v)	FIELD_PREP(PEF2256_SIC2_SICS_MASK, _v)
+
+/* System Interface Control 3 */
+#define PEF2256_SIC3		0x40
+#define PEF2256_SIC3_RTRI	BIT(5)
+#define PEF2256_SIC3_RESX	BIT(3)
+#define PEF2256_SIC3_RESR	BIT(2)
+
+/* Clock Mode Register 1 */
+#define PEF2256_CMR1			0x44
+#define PEF2256_CMR1_RS_MASK		GENMASK(5, 4)
+#define PEF2256_CMR1_RS_DPLL		FIELD_PREP_CONST(PEF2256_CMR1_RS_MASK, 0x0)
+#define PEF2256_CMR1_RS_DPLL_LOS_HIGH	FIELD_PREP_CONST(PEF2256_CMR1_RS_MASK, 0x1)
+#define PEF2256_CMR1_RS_DCOR_2048	FIELD_PREP_CONST(PEF2256_CMR1_RS_MASK, 0x2)
+#define PEF2256_CMR1_RS_DCOR_8192	FIELD_PREP_CONST(PEF2256_CMR1_RS_MASK, 0x3)
+#define PEF2256_CMR1_DCS		BIT(3)
+
+/* Clock Mode Register 2 */
+#define PEF2256_CMR2		0x45
+#define PEF2256_CMR2_DCOXC	BIT(5)
+
+/* Global Configuration Register */
+#define PEF2256_GCR		0x46
+#define PEF2256_GCR_SCI		BIT(6)
+#define PEF2256_GCR_ECMC	BIT(4)
+
+/* Port Configuration 5 */
+#define PEF2256_PC5		0x84
+#define PEF2256_PC5_CRP         BIT(0)
+
+/* Global Port Configuration 1 */
+#define PEF2256_GPC1			0x85
+#define PEF2256_GPC1_CSFP_MASK		GENMASK(7, 5)
+#define PEF2256_GPC1_CSFP_SEC_IN_HIGH	FIELD_PREP_CONST(PEF2256_GPC1_CSFP_MASK, 0x0)
+#define PEF2256_GPC1_CSFP_SEC_OUT_HIGH	FIELD_PREP_CONST(PEF2256_GPC1_CSFP_MASK, 0x1)
+#define PEF2256_GPC1_CSFP_FSC_OUT_HIGH	FIELD_PREP_CONST(PEF2256_GPC1_CSFP_MASK, 0x2)
+#define PEF2256_GPC1_CSFP_FSC_OUT_LOW	FIELD_PREP_CONST(PEF2256_GPC1_CSFP_MASK, 0x3)
+
+/* Port Configuration 6 */
+#define PEF2256_PC6		0x86
+
+/* Global Counter Mode n=1..8 */
+#define PEF2256_GCM(_n)         (0x92 + (_n) - 1)
+#define PEF2256_GCM1	        0x92
+#define PEF2256_GCM2	        0x93
+#define PEF2256_GCM3	        0x94
+#define PEF2256_GCM4	        0x95
+#define PEF2256_GCM5	        0x96
+#define PEF2256_GCM6	        0x97
+#define PEF2256_GCM7	        0x98
+#define PEF2256_GCM8	        0x99
+
+/* Version Status Register */
+#define PEF2256_VSTR		 0x4A
+#define PEF2256_VSTR_VERSION_12	 0x00
+#define PEF2256_VSTR_VERSION_21	 0x10
+#define PEF2256_VSTR_VERSION_2x	 0x05
+
+/* Framer Receive Status 0 */
+#define PEF2256_FRS0		0x4C
+#define PEF2256_FRS0_LOS	BIT(7)
+#define PEF2256_FRS0_AIS	BIT(6)
+
+/* Interrupt Status Register 0..5 */
+#define PEF2256_ISR(_n)		(0x68 + (_n))
+#define PEF2256_ISR0		0x68
+#define PEF2256_ISR1		0x69
+#define PEF2256_ISR2		0x6A
+#define PEF2256_ISR3		0x6B
+#define PEF2256_ISR4		0x6C
+#define PEF2256_ISR5		0x6D
+
+/* Global Interrupt Status */
+#define PEF2256_GIS		0x6E
+#define PEF2256_GIS_ISR(_n)	BIT(_n)
+
+/* Wafer Identification Register */
+#define PEF2256_WID		   0xEC
+#define PEF2256_12_WID_MASK	   GENMASK(1, 0)
+#define PEF2256_12_WID_VERSION_12  FIELD_PREP_CONST(PEF2256_12_WID_MASK, 0x3)
+#define PEF2256_2X_WID_MASK	   GENMASK(7, 6)
+#define PEF2256_2X_WID_VERSION_21  FIELD_PREP_CONST(PEF2256_2X_WID_MASK, 0x0)
+#define PEF2256_2X_WID_VERSION_22  FIELD_PREP_CONST(PEF2256_2X_WID_MASK, 0x1)
+
+/* IMR2/ISR2 Interrupts common bits */
+#define PEF2256_INT2_AIS	BIT(3)
+#define PEF2256_INT2_LOS	BIT(2)
+
+#endif /* __PEF2256_REGS_H__ */

drivers/pinctrl/Kconfig

@@ -366,6 +366,21 @@ config PINCTRL_PALMAS
 	  open drain configuration for the Palmas series devices like
 	  TPS65913, TPS80036 etc.
 
+config PINCTRL_PEF2256
+	tristate "Lantiq PEF2256 (FALC56) pin controller driver"
+	depends on OF && FRAMER_PEF2256
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+	help
+	  This option enables the pin controller support for the Lantiq PEF2256
+	  framer, also known as FALC56.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called pinctrl-pef2256.
+
 config PINCTRL_PIC32
 	bool "Microchip PIC32 pin controller driver"
 	depends on OF

drivers/pinctrl/Makefile

@@ -39,6 +39,7 @@ obj-$(CONFIG_PINCTRL_MICROCHIP_SGPIO)	+= pinctrl-microchip-sgpio.o
 obj-$(CONFIG_PINCTRL_MLXBF3)	+= pinctrl-mlxbf3.o
 obj-$(CONFIG_PINCTRL_OCELOT)	+= pinctrl-ocelot.o
 obj-$(CONFIG_PINCTRL_PALMAS)	+= pinctrl-palmas.o
+obj-$(CONFIG_PINCTRL_PEF2256)	+= pinctrl-pef2256.o
 obj-$(CONFIG_PINCTRL_PIC32)	+= pinctrl-pic32.o
 obj-$(CONFIG_PINCTRL_PISTACHIO)	+= pinctrl-pistachio.o
 obj-$(CONFIG_PINCTRL_RK805)	+= pinctrl-rk805.o

include/linux/framer/framer-provider.h

+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Generic framer profider header file
+ *
+ * Copyright 2023 CS GROUP France
+ *
+ * Author: Herve Codina <herve.codina@bootlin.com>
+ */
+
+#ifndef __DRIVERS_PROVIDER_FRAMER_H
+#define __DRIVERS_PROVIDER_FRAMER_H
+
+#include <linux/export.h>
+#include <linux/framer/framer.h>
+#include <linux/types.h>
+
+#define FRAMER_FLAG_POLL_STATUS  BIT(0)
+
+/**
+ * struct framer_ops - set of function pointers for performing framer operations
+ * @init: operation to be performed for initializing the framer
+ * @exit: operation to be performed while exiting
+ * @power_on: powering on the framer
+ * @power_off: powering off the framer
+ * @flags: OR-ed flags (FRAMER_FLAG_*) to ask for core functionality
+ *          - @FRAMER_FLAG_POLL_STATUS:
+ *            Ask the core to perform a polling to get the framer status and
+ *            notify consumers on change.
+ *            The framer should call @framer_notify_status_change() when it
+ *            detects a status change. This is usually done using interrupts.
+ *            If the framer cannot detect this change, it can ask the core for
+ *            a status polling. The core will call @get_status() periodically
+ *            and, on change detected, it will notify the consumer.
+ *            the @get_status()
+ * @owner: the module owner containing the ops
+ */
+struct framer_ops {
+	int	(*init)(struct framer *framer);
+	void	(*exit)(struct framer *framer);
+	int	(*power_on)(struct framer *framer);
+	int	(*power_off)(struct framer *framer);
+
+	/**
+	 * @get_status:
+	 *
+	 * Optional.
+	 *
+	 * Used to get the framer status. framer_init() must have
+	 * been called on the framer.
+	 *
+	 * Returns: 0 if successful, an negative error code otherwise
+	 */
+	int	(*get_status)(struct framer *framer, struct framer_status *status);
+
+	/**
+	 * @set_config:
+	 *
+	 * Optional.
+	 *
+	 * Used to set the framer configuration. framer_init() must have
+	 * been called on the framer.
+	 *
+	 * Returns: 0 if successful, an negative error code otherwise
+	 */
+	int	(*set_config)(struct framer *framer, const struct framer_config *config);
+
+	/**
+	 * @get_config:
+	 *
+	 * Optional.
+	 *
+	 * Used to get the framer configuration. framer_init() must have
+	 * been called on the framer.
+	 *
+	 * Returns: 0 if successful, an negative error code otherwise
+	 */
+	int	(*get_config)(struct framer *framer, struct framer_config *config);
+
+	u32 flags;
+	struct module *owner;
+};
+
+/**
+ * struct framer_provider - represents the framer provider
+ * @dev: framer provider device
+ * @children: can be used to override the default (dev->of_node) child node
+ * @owner: the module owner having of_xlate
+ * @list: to maintain a linked list of framer providers
+ * @of_xlate: function pointer to obtain framer instance from framer pointer
+ */
+struct framer_provider {
+	struct device		*dev;
+	struct module		*owner;
+	struct list_head	list;
+	struct framer * (*of_xlate)(struct device *dev,
+				    struct of_phandle_args *args);
+};
+
+static inline void framer_set_drvdata(struct framer *framer, void *data)
+{
+	dev_set_drvdata(&framer->dev, data);
+}
+
+static inline void *framer_get_drvdata(struct framer *framer)
+{
+	return dev_get_drvdata(&framer->dev);
+}
+
+#if IS_ENABLED(CONFIG_GENERIC_FRAMER)
+
+/* Create and destroy a framer */
+struct framer *framer_create(struct device *dev, struct device_node *node,
+			     const struct framer_ops *ops);
+void framer_destroy(struct framer *framer);
+
+/* devm version */
+struct framer *devm_framer_create(struct device *dev, struct device_node *node,
+				  const struct framer_ops *ops);
+
+struct framer *framer_provider_simple_of_xlate(struct device *dev,
+					       struct of_phandle_args *args);
+
+struct framer_provider *
+__framer_provider_of_register(struct device *dev, struct module *owner,
+			      struct framer *(*of_xlate)(struct device *dev,
+							 struct of_phandle_args *args));
+
+void framer_provider_of_unregister(struct framer_provider *framer_provider);
+
+struct framer_provider *
+__devm_framer_provider_of_register(struct device *dev, struct module *owner,
+				   struct framer *(*of_xlate)(struct device *dev,
+							      struct of_phandle_args *args));
+
+void framer_notify_status_change(struct framer *framer);
+
+#else /* IS_ENABLED(CONFIG_GENERIC_FRAMER) */
+
+static inline struct framer *framer_create(struct device *dev, struct device_node *node,
+					   const struct framer_ops *ops)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline void framer_destroy(struct framer *framer)
+{
+}
+
+/* devm version */
+static inline struct framer *devm_framer_create(struct device *dev, struct device_node *node,
+						const struct framer_ops *ops)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline struct framer *framer_provider_simple_of_xlate(struct device *dev,
+							     struct of_phandle_args *args)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline struct framer_provider *
+__framer_provider_of_register(struct device *dev, struct module *owner,
+			      struct framer *(*of_xlate)(struct device *dev,
+							 struct of_phandle_args *args))
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+void framer_provider_of_unregister(struct framer_provider *framer_provider)
+{
+}
+
+static inline struct framer_provider *
+__devm_framer_provider_of_register(struct device *dev, struct module *owner,
+				   struct framer *(*of_xlate)(struct device *dev,
+							      struct of_phandle_args *args))
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+void framer_notify_status_change(struct framer *framer)
+{
+}
+
+#endif /* IS_ENABLED(CONFIG_GENERIC_FRAMER) */
+
+#define framer_provider_of_register(dev, xlate)		\
+	__framer_provider_of_register((dev), THIS_MODULE, (xlate))
+
+#define devm_framer_provider_of_register(dev, xlate)	\
+	__devm_framer_provider_of_register((dev), THIS_MODULE, (xlate))
+
+#endif /* __DRIVERS_PROVIDER_FRAMER_H */

include/linux/framer/framer.h

+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Generic framer header file
+ *
+ * Copyright 2023 CS GROUP France
+ *
+ * Author: Herve Codina <herve.codina@bootlin.com>
+ */
+
+#ifndef __DRIVERS_FRAMER_H
+#define __DRIVERS_FRAMER_H
+
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/notifier.h>
+#include <linux/of.h>
+#include <linux/device.h>
+#include <linux/workqueue.h>
+
+/**
+ * enum framer_iface - Framer interface
+ * @FRAMER_IFACE_E1: E1 interface
+ * @FRAMER_IFACE_T1: T1 interface
+ */
+enum framer_iface {
+	FRAMER_IFACE_E1,
+	FRAMER_IFACE_T1,
+};
+
+/**
+ * enum framer_clock_type - Framer clock type
+ * @FRAMER_CLOCK_EXT: External clock
+ * @FRAMER_CLOCK_INT: Internal clock
+ */
+enum framer_clock_type {
+	FRAMER_CLOCK_EXT,
+	FRAMER_CLOCK_INT,
+};
+
+/**
+ * struct framer_config - Framer configuration
+ * @iface: Framer line interface
+ * @clock_type: Framer clock type
+ * @line_clock_rate: Framer line clock rate
+ */
+struct framer_config {
+	enum framer_iface iface;
+	enum framer_clock_type clock_type;
+	unsigned long line_clock_rate;
+};
+
+/**
+ * struct framer_status - Framer status
+ * @link_is_on: Framer link state. true, the link is on, false, the link is off.
+ */
+struct framer_status {
+	bool link_is_on;
+};
+
+/**
+ * enum framer_event - Event available for notification
+ * @FRAMER_EVENT_STATUS: Event notified on framer_status changes
+ */
+enum framer_event {
+	FRAMER_EVENT_STATUS,
+};
+
+/**
+ * struct framer - represents the framer device
+ * @dev: framer device
+ * @id: id of the framer device
+ * @ops: function pointers for performing framer operations
+ * @mutex: mutex to protect framer_ops
+ * @init_count: used to protect when the framer is used by multiple consumers
+ * @power_count: used to protect when the framer is used by multiple consumers
+ * @pwr: power regulator associated with the framer
+ * @notify_status_work: work structure used for status notifications
+ * @notifier_list: notifier list used for notifications
+ * @polling_work: delayed work structure used for the polling task
+ * @prev_status: previous read status used by the polling task to detect changes
+ */
+struct framer {
+	struct device			dev;
+	int				id;
+	const struct framer_ops		*ops;
+	struct mutex			mutex;	/* Protect framer */
+	int				init_count;
+	int				power_count;
+	struct regulator		*pwr;
+	struct work_struct		notify_status_work;
+	struct blocking_notifier_head	notifier_list;
+	struct delayed_work		polling_work;
+	struct framer_status		prev_status;
+};
+
+#if IS_ENABLED(CONFIG_GENERIC_FRAMER)
+int framer_pm_runtime_get(struct framer *framer);
+int framer_pm_runtime_get_sync(struct framer *framer);
+int framer_pm_runtime_put(struct framer *framer);
+int framer_pm_runtime_put_sync(struct framer *framer);
+int framer_init(struct framer *framer);
+int framer_exit(struct framer *framer);
+int framer_power_on(struct framer *framer);
+int framer_power_off(struct framer *framer);
+int framer_get_status(struct framer *framer, struct framer_status *status);
+int framer_get_config(struct framer *framer, struct framer_config *config);
+int framer_set_config(struct framer *framer, const struct framer_config *config);
+int framer_notifier_register(struct framer *framer, struct notifier_block *nb);
+int framer_notifier_unregister(struct framer *framer, struct notifier_block *nb);
+
+struct framer *framer_get(struct device *dev, const char *con_id);
+void framer_put(struct device *dev, struct framer *framer);
+
+struct framer *devm_framer_get(struct device *dev, const char *con_id);
+struct framer *devm_framer_optional_get(struct device *dev, const char *con_id);
+#else
+static inline int framer_pm_runtime_get(struct framer *framer)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_pm_runtime_get_sync(struct framer *framer)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_pm_runtime_put(struct framer *framer)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_pm_runtime_put_sync(struct framer *framer)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_init(struct framer *framer)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_exit(struct framer *framer)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_power_on(struct framer *framer)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_power_off(struct framer *framer)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_get_status(struct framer *framer, struct framer_status *status)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_get_config(struct framer *framer, struct framer_config *config)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_set_config(struct framer *framer, const struct framer_config *config)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_notifier_register(struct framer *framer,
+					   struct notifier_block *nb)
+{
+	return -ENOSYS;
+}
+
+static inline int framer_notifier_unregister(struct framer *framer,
+					     struct notifier_block *nb)
+{
+	return -ENOSYS;
+}
+
+struct framer *framer_get(struct device *dev, const char *con_id)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+void framer_put(struct device *dev, struct framer *framer)
+{
+}
+
+static inline struct framer *devm_framer_get(struct device *dev, const char *con_id)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline struct framer *devm_framer_optional_get(struct device *dev, const char *con_id)
+{
+	return NULL;
+}
+
+#endif
+
+#endif /* __DRIVERS_FRAMER_H */

include/linux/framer/pef2256.h

+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * PEF2256 consumer API
+ *
+ * Copyright 2023 CS GROUP France
+ *
+ * Author: Herve Codina <herve.codina@bootlin.com>
+ */
+#ifndef __PEF2256_H__
+#define __PEF2256_H__
+
+#include <linux/types.h>
+
+struct pef2256;
+struct regmap;
+
+/* Retrieve the PEF2256 regmap */
+struct regmap *pef2256_get_regmap(struct pef2256 *pef2256);
+
+/* PEF2256 hardware versions */
+enum pef2256_version {
+	PEF2256_VERSION_UNKNOWN,
+	PEF2256_VERSION_1_2,
+	PEF2256_VERSION_2_1,
+	PEF2256_VERSION_2_2,
+};
+
+/* Get the PEF2256 hardware version */
+enum pef2256_version pef2256_get_version(struct pef2256 *pef2256);
+
+#endif /* __PEF2256_H__ */