Merge remote-tracking branch 'regmap/topic/field' into regmap-next

7 files changed, 1689 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-st.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-st.txt
new file mode 100644
index 00000000000..05bf82a07df
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-st.txt
@@ -0,0 +1,110 @@
+*ST pin controller.
+
+Each multi-function pin is controlled, driven and routed through the
+PIO multiplexing block. Each pin supports GPIO functionality (ALT0)
+and multiple alternate functions(ALT1 - ALTx) that directly connect
+the pin to different hardware blocks.
+
+When a pin is in GPIO mode, Output Enable (OE), Open Drain(OD), and
+Pull Up (PU) are driven by the related PIO block.
+
+ST pinctrl driver controls PIO multiplexing block and also interacts with
+gpio driver to configure a pin.
+
+Required properties: (PIO multiplexing block)
+- compatible	: should be "st,<SOC>-<pio-block>-pinctrl"
+	like st,stih415-sbc-pinctrl, st,stih415-front-pinctrl and so on.
+- gpio-controller : Indicates this device is a GPIO controller
+- #gpio-cells	  : Should be one. The first cell is the pin number.
+- st,retime-pin-mask	: Should be mask to specify which pins can be retimed.
+	If the property is not present, it is assumed that all the pins in the
+	bank are capable of retiming. Retiming is mainly used to improve the
+	IO timing margins of external synchronous interfaces.
+- st,bank-name		: Should be a name string for this bank as
+			specified in datasheet.
+- st,syscfg		: Should be a phandle of the syscfg node.
+
+Example:
+	pin-controller-sbc {
+		#address-cells	= <1>;
+		#size-cells	= <1>;
+		compatible	= "st,stih415-sbc-pinctrl";
+		st,syscfg	= <&syscfg_sbc>;
+		ranges 		= <0 0xfe610000 0x5000>;
+		PIO0: gpio@fe610000 {
+			gpio-controller;
+			#gpio-cells	= <1>;
+			reg		= <0 0x100>;
+			st,bank-name	= "PIO0";
+		};
+		...
+		pin-functions nodes follow...
+	};
+
+
+Contents of function subnode node:
+----------------------
+Required properties for pin configuration node:
+- st,pins	: Child node with list of pins with configuration.
+
+Below is the format of how each pin conf should look like.
+
+<bank offset mux mode rt_type rt_delay rt_clk>
+
+Every PIO is represented with 4-7 parameters depending on retime configuration.
+Each parameter is explained as below.
+
+-bank		: Should be bank phandle to which this PIO belongs.
+-offset		: Offset in the PIO bank.
+-mux		: Should be alternate function number associated this pin.
+		Use same numbers from datasheet.
+-mode		:pin configuration is selected from one of the below values.
+		IN
+		IN_PU
+		OUT
+		BIDIR
+		BIDIR_PU
+
+-rt_type	Retiming Configuration for the pin.
+		Possible retime configuration are:
+
+		-------		-------------
+		value		args
+		-------		-------------
+		NICLK		<delay> <clk>
+		ICLK_IO		<delay> <clk>
+		BYPASS		<delay>
+		DE_IO		<delay> <clk>
+		SE_ICLK_IO	<delay> <clk>
+		SE_NICLK_IO	<delay> <clk>
+
+- delay	is retime delay in pico seconds as mentioned in data sheet.
+
+- rt_clk	:clk to be use for retime.
+		Possible values are:
+		CLK_A
+		CLK_B
+		CLK_C
+		CLK_D
+
+Example of mmcclk pin which is a bi-direction pull pu with retime config
+as non inverted clock retimed with CLK_B and delay of 0 pico seconds:
+
+pin-controller {
+	...
+	mmc0 {
+		pinctrl_mmc: mmc {
+			st,pins {
+				mmcclk = <&PIO13 4 ALT4 BIDIR_PU NICLK 0 CLK_B>;
+				...
+			};
+		};
+	...
+	};
+};
+
+sdhci0:sdhci@fe810000{
+	...
+	pinctrl-names = "default";
+	pinctrl-0	= <&pinctrl_mmc>;
+};
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index ae23d8391aa..29c83160ca2 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -176,6 +176,14 @@ struct regmap_range_node {
 	unsigned int window_len;
 };
 
+struct regmap_field {
+	struct regmap *regmap;
+	unsigned int mask;
+	/* lsb */
+	unsigned int shift;
+	unsigned int reg;
+};
+
 #ifdef CONFIG_DEBUG_FS
 extern void regmap_debugfs_initcall(void);
 extern void regmap_debugfs_init(struct regmap *map, const char *name);
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index ed152e3d2d8..95920583e31 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -807,6 +807,95 @@ struct regmap *devm_regmap_init(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(devm_regmap_init);
 
+static void regmap_field_init(struct regmap_field *rm_field,
+	struct regmap *regmap, struct reg_field reg_field)
+{
+	int field_bits = reg_field.msb - reg_field.lsb + 1;
+	rm_field->regmap = regmap;
+	rm_field->reg = reg_field.reg;
+	rm_field->shift = reg_field.lsb;
+	rm_field->mask = ((BIT(field_bits) - 1) << reg_field.lsb);
+}
+
+/**
+ * devm_regmap_field_alloc(): Allocate and initialise a register field
+ * in a register map.
+ *
+ * @dev: Device that will be interacted with
+ * @regmap: regmap bank in which this register field is located.
+ * @reg_field: Register field with in the bank.
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct regmap_field. The regmap_field will be automatically freed
+ * by the device management code.
+ */
+struct regmap_field *devm_regmap_field_alloc(struct device *dev,
+		struct regmap *regmap, struct reg_field reg_field)
+{
+	struct regmap_field *rm_field = devm_kzalloc(dev,
+					sizeof(*rm_field), GFP_KERNEL);
+	if (!rm_field)
+		return ERR_PTR(-ENOMEM);
+
+	regmap_field_init(rm_field, regmap, reg_field);
+
+	return rm_field;
+
+}
+EXPORT_SYMBOL_GPL(devm_regmap_field_alloc);
+
+/**
+ * devm_regmap_field_free(): Free register field allocated using
+ * devm_regmap_field_alloc. Usally drivers need not call this function,
+ * as the memory allocated via devm will be freed as per device-driver
+ * life-cyle.
+ *
+ * @dev: Device that will be interacted with
+ * @field: regmap field which should be freed.
+ */
+void devm_regmap_field_free(struct device *dev,
+	struct regmap_field *field)
+{
+	devm_kfree(dev, field);
+}
+EXPORT_SYMBOL_GPL(devm_regmap_field_free);
+
+/**
+ * regmap_field_alloc(): Allocate and initialise a register field
+ * in a register map.
+ *
+ * @regmap: regmap bank in which this register field is located.
+ * @reg_field: Register field with in the bank.
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct regmap_field. The regmap_field should be freed by the
+ * user once its finished working with it using regmap_field_free().
+ */
+struct regmap_field *regmap_field_alloc(struct regmap *regmap,
+		struct reg_field reg_field)
+{
+	struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL);
+
+	if (!rm_field)
+		return ERR_PTR(-ENOMEM);
+
+	regmap_field_init(rm_field, regmap, reg_field);
+
+	return rm_field;
+}
+EXPORT_SYMBOL_GPL(regmap_field_alloc);
+
+/**
+ * regmap_field_free(): Free register field allocated using regmap_field_alloc
+ *
+ * @field: regmap field which should be freed.
+ */
+void regmap_field_free(struct regmap_field *field)
+{
+	kfree(field);
+}
+EXPORT_SYMBOL_GPL(regmap_field_free);
+
 /**
  * regmap_reinit_cache(): Reinitialise the current register cache
  *
@@ -1255,6 +1344,22 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
 }
 EXPORT_SYMBOL_GPL(regmap_raw_write);
 
+/**
+ * regmap_field_write(): Write a value to a single register field
+ *
+ * @field: Register field to write to
+ * @val: Value to be written
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_field_write(struct regmap_field *field, unsigned int val)
+{
+	return regmap_update_bits(field->regmap, field->reg,
+				field->mask, val << field->shift);
+}
+EXPORT_SYMBOL_GPL(regmap_field_write);
+
 /*
  * regmap_bulk_write(): Write multiple registers to the device
  *
@@ -1538,6 +1643,31 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
 EXPORT_SYMBOL_GPL(regmap_raw_read);
 
 /**
+ * regmap_field_read(): Read a value to a single register field
+ *
+ * @field: Register field to read from
+ * @val: Pointer to store read value
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_field_read(struct regmap_field *field, unsigned int *val)
+{
+	int ret;
+	unsigned int reg_val;
+	ret = regmap_read(field->regmap, field->reg, &reg_val);
+	if (ret != 0)
+		return ret;
+
+	reg_val &= field->mask;
+	reg_val >>= field->shift;
+	*val = reg_val;
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_field_read);
+
+/**
  * regmap_bulk_read(): Read multiple registers from the device
  *
  * @map: Register map to write to
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 8f669243814..1a147cf821f 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -169,6 +169,12 @@ config PINCTRL_SUNXI
 	select PINMUX
 	select GENERIC_PINCONF
 
+config PINCTRL_ST
+	bool
+	depends on OF
+	select PINMUX
+	select PINCONF
+
 config PINCTRL_TEGRA
 	bool
 	select PINMUX
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 9bdaeb8785c..6fc78445d0f 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_PINCTRL_EXYNOS5440)	+= pinctrl-exynos5440.o
 obj-$(CONFIG_PINCTRL_S3C64XX)	+= pinctrl-s3c64xx.o
 obj-$(CONFIG_PINCTRL_XWAY)	+= pinctrl-xway.o
 obj-$(CONFIG_PINCTRL_LANTIQ)	+= pinctrl-lantiq.o
+obj-$(CONFIG_PINCTRL_ST) 	+= pinctrl-st.o
 
 obj-$(CONFIG_PLAT_ORION)        += mvebu/
 obj-$(CONFIG_ARCH_SHMOBILE)	+= sh-pfc/
diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c
new file mode 100644
index 00000000000..04d4506ae18
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-st.c
@@ -0,0 +1,1403 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Authors:
+ *	Srinivas Kandagatla <srinivas.kandagatla@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/of_address.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/platform_device.h>
+#include "core.h"
+
+/* PIO Block registers */
+/* PIO output */
+#define REG_PIO_POUT			0x00
+/* Set bits of POUT */
+#define REG_PIO_SET_POUT		0x04
+/* Clear bits of POUT */
+#define REG_PIO_CLR_POUT		0x08
+/* PIO input */
+#define REG_PIO_PIN			0x10
+/* PIO configuration */
+#define REG_PIO_PC(n)			(0x20 + (n) * 0x10)
+/* Set bits of PC[2:0] */
+#define REG_PIO_SET_PC(n)		(0x24 + (n) * 0x10)
+/* Clear bits of PC[2:0] */
+#define REG_PIO_CLR_PC(n)		(0x28 + (n) * 0x10)
+/* PIO input comparison */
+#define REG_PIO_PCOMP			0x50
+/* Set bits of PCOMP */
+#define REG_PIO_SET_PCOMP		0x54
+/* Clear bits of PCOMP */
+#define REG_PIO_CLR_PCOMP		0x58
+/* PIO input comparison mask */
+#define REG_PIO_PMASK			0x60
+/* Set bits of PMASK */
+#define REG_PIO_SET_PMASK		0x64
+/* Clear bits of PMASK */
+#define REG_PIO_CLR_PMASK		0x68
+
+#define ST_GPIO_DIRECTION_BIDIR	0x1
+#define ST_GPIO_DIRECTION_OUT	0x2
+#define ST_GPIO_DIRECTION_IN	0x4
+
+/**
+ *  Packed style retime configuration.
+ *  There are two registers cfg0 and cfg1 in this style for each bank.
+ *  Each field in this register is 8 bit corresponding to 8 pins in the bank.
+ */
+#define RT_P_CFGS_PER_BANK			2
+#define RT_P_CFG0_CLK1NOTCLK0_FIELD(reg)	REG_FIELD(reg, 0, 7)
+#define RT_P_CFG0_DELAY_0_FIELD(reg)		REG_FIELD(reg, 16, 23)
+#define RT_P_CFG0_DELAY_1_FIELD(reg)		REG_FIELD(reg, 24, 31)
+#define RT_P_CFG1_INVERTCLK_FIELD(reg)		REG_FIELD(reg, 0, 7)
+#define RT_P_CFG1_RETIME_FIELD(reg)		REG_FIELD(reg, 8, 15)
+#define RT_P_CFG1_CLKNOTDATA_FIELD(reg)		REG_FIELD(reg, 16, 23)
+#define RT_P_CFG1_DOUBLE_EDGE_FIELD(reg)	REG_FIELD(reg, 24, 31)
+
+/**
+ * Dedicated style retime Configuration register
+ * each register is dedicated per pin.
+ */
+#define RT_D_CFGS_PER_BANK		8
+#define RT_D_CFG_CLK_SHIFT		0
+#define RT_D_CFG_CLK_MASK		(0x3 << 0)
+#define RT_D_CFG_CLKNOTDATA_SHIFT	2
+#define RT_D_CFG_CLKNOTDATA_MASK	BIT(2)
+#define RT_D_CFG_DELAY_SHIFT		3
+#define RT_D_CFG_DELAY_MASK		(0xf << 3)
+#define RT_D_CFG_DELAY_INNOTOUT_SHIFT	7
+#define RT_D_CFG_DELAY_INNOTOUT_MASK	BIT(7)
+#define RT_D_CFG_DOUBLE_EDGE_SHIFT	8
+#define RT_D_CFG_DOUBLE_EDGE_MASK	BIT(8)
+#define RT_D_CFG_INVERTCLK_SHIFT	9
+#define RT_D_CFG_INVERTCLK_MASK		BIT(9)
+#define RT_D_CFG_RETIME_SHIFT		10
+#define RT_D_CFG_RETIME_MASK		BIT(10)
+
+/*
+ * Pinconf is represented in an opaque unsigned long variable.
+ * Below is the bit allocation details for each possible configuration.
+ * All the bit fields can be encapsulated into four variables
+ * (direction, retime-type, retime-clk, retime-delay)
+ *
+ *	 +----------------+
+ *[31:28]| reserved-3     |
+ *	 +----------------+-------------
+ *[27]   |	oe	  |		|
+ *	 +----------------+		v
+ *[26]   |	pu	  |	[Direction	]
+ *	 +----------------+		^
+ *[25]   |	od	  |		|
+ *	 +----------------+-------------
+ *[24]   | reserved-2     |
+ *	 +----------------+-------------
+ *[23]   |    retime      |		|
+ *	 +----------------+		|
+ *[22]   | retime-invclk  |		|
+ *	 +----------------+		v
+ *[21]   |retime-clknotdat|	[Retime-type	]
+ *	 +----------------+		^
+ *[20]   | retime-de      |		|
+ *	 +----------------+-------------
+ *[19:18]| retime-clk     |------>[Retime-Clk	]
+ *	 +----------------+
+ *[17:16]|  reserved-1    |
+ *	 +----------------+
+ *[15..0]| retime-delay   |------>[Retime Delay]
+ *	 +----------------+
+ */
+
+#define ST_PINCONF_UNPACK(conf, param)\
+				((conf >> ST_PINCONF_ ##param ##_SHIFT) \
+				& ST_PINCONF_ ##param ##_MASK)
+
+#define ST_PINCONF_PACK(conf, val, param)	(conf |=\
+				((val & ST_PINCONF_ ##param ##_MASK) << \
+					ST_PINCONF_ ##param ##_SHIFT))
+
+/* Output enable */
+#define ST_PINCONF_OE_MASK		0x1
+#define ST_PINCONF_OE_SHIFT		27
+#define ST_PINCONF_OE			BIT(27)
+#define ST_PINCONF_UNPACK_OE(conf)	ST_PINCONF_UNPACK(conf, OE)
+#define ST_PINCONF_PACK_OE(conf)	ST_PINCONF_PACK(conf, 1, OE)
+
+/* Pull Up */
+#define ST_PINCONF_PU_MASK		0x1
+#define ST_PINCONF_PU_SHIFT		26
+#define ST_PINCONF_PU			BIT(26)
+#define ST_PINCONF_UNPACK_PU(conf)	ST_PINCONF_UNPACK(conf, PU)
+#define ST_PINCONF_PACK_PU(conf)	ST_PINCONF_PACK(conf, 1, PU)
+
+/* Open Drain */
+#define ST_PINCONF_OD_MASK		0x1
+#define ST_PINCONF_OD_SHIFT		25
+#define ST_PINCONF_OD			BIT(25)
+#define ST_PINCONF_UNPACK_OD(conf)	ST_PINCONF_UNPACK(conf, OD)
+#define ST_PINCONF_PACK_OD(conf)	ST_PINCONF_PACK(conf, 1, OD)
+
+#define ST_PINCONF_RT_MASK		0x1
+#define ST_PINCONF_RT_SHIFT		23
+#define ST_PINCONF_RT			BIT(23)
+#define ST_PINCONF_UNPACK_RT(conf)	ST_PINCONF_UNPACK(conf, RT)
+#define ST_PINCONF_PACK_RT(conf)	ST_PINCONF_PACK(conf, 1, RT)
+
+#define ST_PINCONF_RT_INVERTCLK_MASK	0x1
+#define ST_PINCONF_RT_INVERTCLK_SHIFT	22
+#define ST_PINCONF_RT_INVERTCLK		BIT(22)
+#define ST_PINCONF_UNPACK_RT_INVERTCLK(conf) \
+			ST_PINCONF_UNPACK(conf, RT_INVERTCLK)
+#define ST_PINCONF_PACK_RT_INVERTCLK(conf) \
+			ST_PINCONF_PACK(conf, 1, RT_INVERTCLK)
+
+#define ST_PINCONF_RT_CLKNOTDATA_MASK	0x1
+#define ST_PINCONF_RT_CLKNOTDATA_SHIFT	21
+#define ST_PINCONF_RT_CLKNOTDATA	BIT(21)
+#define ST_PINCONF_UNPACK_RT_CLKNOTDATA(conf)	\
+				ST_PINCONF_UNPACK(conf, RT_CLKNOTDATA)
+#define ST_PINCONF_PACK_RT_CLKNOTDATA(conf) \
+				ST_PINCONF_PACK(conf, 1, RT_CLKNOTDATA)
+
+#define ST_PINCONF_RT_DOUBLE_EDGE_MASK	0x1
+#define ST_PINCONF_RT_DOUBLE_EDGE_SHIFT	20
+#define ST_PINCONF_RT_DOUBLE_EDGE	BIT(20)
+#define ST_PINCONF_UNPACK_RT_DOUBLE_EDGE(conf) \
+				ST_PINCONF_UNPACK(conf, RT_DOUBLE_EDGE)
+#define ST_PINCONF_PACK_RT_DOUBLE_EDGE(conf) \
+				ST_PINCONF_PACK(conf, 1, RT_DOUBLE_EDGE)
+
+#define ST_PINCONF_RT_CLK_MASK		0x3
+#define ST_PINCONF_RT_CLK_SHIFT		18
+#define ST_PINCONF_RT_CLK		BIT(18)
+#define ST_PINCONF_UNPACK_RT_CLK(conf)	ST_PINCONF_UNPACK(conf, RT_CLK)
+#define ST_PINCONF_PACK_RT_CLK(conf, val) ST_PINCONF_PACK(conf, val, RT_CLK)
+
+/* RETIME_DELAY in Pico Secs */
+#define ST_PINCONF_RT_DELAY_MASK	0xffff
+#define ST_PINCONF_RT_DELAY_SHIFT	0
+#define ST_PINCONF_UNPACK_RT_DELAY(conf) ST_PINCONF_UNPACK(conf, RT_DELAY)
+#define ST_PINCONF_PACK_RT_DELAY(conf, val) \
+				ST_PINCONF_PACK(conf, val, RT_DELAY)
+
+#define ST_GPIO_PINS_PER_BANK	(8)
+#define OF_GPIO_ARGS_MIN	(4)
+#define OF_RT_ARGS_MIN		(2)
+
+#define gpio_range_to_bank(chip) \
+		container_of(chip, struct st_gpio_bank, range)
+
+#define gpio_chip_to_bank(chip) \
+		container_of(chip, struct st_gpio_bank, gpio_chip)
+
+
+enum st_retime_style {
+	st_retime_style_none,
+	st_retime_style_packed,
+	st_retime_style_dedicated,
+};
+
+struct st_retime_dedicated {
+	struct regmap_field *rt[ST_GPIO_PINS_PER_BANK];
+};
+
+struct st_retime_packed {
+	struct regmap_field *clk1notclk0;
+	struct regmap_field *delay_0;
+	struct regmap_field *delay_1;
+	struct regmap_field *invertclk;
+	struct regmap_field *retime;
+	struct regmap_field *clknotdata;
+	struct regmap_field *double_edge;
+};
+
+struct st_pio_control {
+	u32 rt_pin_mask;
+	struct regmap_field *alt, *oe, *pu, *od;
+	/* retiming */
+	union {
+		struct st_retime_packed		rt_p;
+		struct st_retime_dedicated	rt_d;
+	} rt;
+};
+
+struct st_pctl_data {
+	enum st_retime_style rt_style;
+	unsigned int	*input_delays;
+	int		ninput_delays;
+	unsigned int	*output_delays;
+	int		noutput_delays;
+	/* register offset information */
+	int alt, oe, pu, od, rt;
+};
+
+struct st_pinconf {
+	int		pin;
+	const char	*name;
+	unsigned long	config;
+	int		altfunc;
+};
+
+struct st_pmx_func {
+	const char	*name;
+	const char	**groups;
+	unsigned	ngroups;
+};
+
+struct st_pctl_group {
+	const char		*name;
+	unsigned int		*pins;
+	unsigned		npins;
+	struct st_pinconf	*pin_conf;
+};
+
+struct st_gpio_bank {
+	struct gpio_chip		gpio_chip;
+	struct pinctrl_gpio_range	range;
+	void __iomem			*base;
+	struct st_pio_control		pc;
+};
+
+struct st_pinctrl {
+	struct device			*dev;
+	struct pinctrl_dev		*pctl;
+	struct st_gpio_bank		*banks;
+	int				nbanks;
+	struct st_pmx_func		*functions;
+	int				nfunctions;
+	struct st_pctl_group		*groups;
+	int				ngroups;
+	struct regmap			*regmap;
+	const struct st_pctl_data	*data;
+};
+
+/* SOC specific data */
+/* STiH415 data */
+unsigned int stih415_input_delays[] = {0, 500, 1000, 1500};
+unsigned int stih415_output_delays[] = {0, 1000, 2000, 3000};
+
+#define STIH415_PCTRL_COMMON_DATA				\
+	.rt_style	= st_retime_style_packed,		\
+	.input_delays	= stih415_input_delays,			\
+	.ninput_delays	= 4,					\
+	.output_delays = stih415_output_delays,			\
+	.noutput_delays = 4
+
+static const struct st_pctl_data  stih415_sbc_data = {
+	STIH415_PCTRL_COMMON_DATA,
+	.alt = 0, .oe = 5, .pu = 7, .od = 9, .rt = 16,
+};
+
+static const struct st_pctl_data  stih415_front_data = {
+	STIH415_PCTRL_COMMON_DATA,
+	.alt = 0, .oe = 8, .pu = 10, .od = 12, .rt = 16,
+};
+
+static const struct st_pctl_data  stih415_rear_data = {
+	STIH415_PCTRL_COMMON_DATA,
+	.alt = 0, .oe = 6, .pu = 8, .od = 10, .rt = 38,
+};
+
+static const struct st_pctl_data  stih415_left_data = {
+	STIH415_PCTRL_COMMON_DATA,
+	.alt = 0, .oe = 3, .pu = 4, .od = 5, .rt = 6,
+};
+
+static const struct st_pctl_data  stih415_right_data = {
+	STIH415_PCTRL_COMMON_DATA,
+	.alt = 0, .oe = 5, .pu = 7, .od = 9, .rt = 11,
+};
+
+/* STiH416 data */
+unsigned int stih416_delays[] = {0, 300, 500, 750, 1000, 1250, 1500,
+			1750, 2000, 2250, 2500, 2750, 3000, 3250 };
+
+static const struct st_pctl_data  stih416_data = {
+	.rt_style	= st_retime_style_dedicated,
+	.input_delays	= stih416_delays,
+	.ninput_delays	= 14,
+	.output_delays	= stih416_delays,
+	.noutput_delays = 14,
+	.alt = 0, .oe = 40, .pu = 50, .od = 60, .rt = 100,
+};
+
+/* Low level functions.. */
+static inline int st_gpio_bank(int gpio)
+{
+	return gpio/ST_GPIO_PINS_PER_BANK;
+}
+
+static inline int st_gpio_pin(int gpio)
+{
+	return gpio%ST_GPIO_PINS_PER_BANK;
+}
+
+static void st_pinconf_set_config(struct st_pio_control *pc,
+				int pin, unsigned long config)
+{
+	struct regmap_field *output_enable = pc->oe;
+	struct regmap_field *pull_up = pc->pu;
+	struct regmap_field *open_drain = pc->od;
+	unsigned int oe_value, pu_value, od_value;
+	unsigned long mask = BIT(pin);
+
+	regmap_field_read(output_enable, &oe_value);
+	regmap_field_read(pull_up, &pu_value);
+	regmap_field_read(open_drain, &od_value);
+
+	/* Clear old values */
+	oe_value &= ~mask;
+	pu_value &= ~mask;
+	od_value &= ~mask;
+
+	if (config & ST_PINCONF_OE)
+		oe_value |= mask;
+	if (config & ST_PINCONF_PU)
+		pu_value |= mask;
+	if (config & ST_PINCONF_OD)
+		od_value |= mask;
+
+	regmap_field_write(output_enable, oe_value);
+	regmap_field_write(pull_up, pu_value);
+	regmap_field_write(open_drain, od_value);
+}
+
+static void st_pctl_set_function(struct st_pio_control *pc,
+				int pin_id, int function)
+{
+	struct regmap_field *alt = pc->alt;
+	unsigned int val;
+	int pin = st_gpio_pin(pin_id);
+	int offset = pin * 4;
+
+	regmap_field_read(alt, &val);
+	val &= ~(0xf << offset);
+	val |= function << offset;
+	regmap_field_write(alt, val);
+}
+
+static unsigned long st_pinconf_delay_to_bit(unsigned int delay,
+	const struct st_pctl_data *data, unsigned long config)
+{
+	unsigned int *delay_times;
+	int num_delay_times, i, closest_index = -1;
+	unsigned int closest_divergence = UINT_MAX;
+
+	if (ST_PINCONF_UNPACK_OE(config)) {
+		delay_times = data->output_delays;
+		num_delay_times = data->noutput_delays;
+	} else {
+		delay_times = data->input_delays;
+		num_delay_times = data->ninput_delays;
+	}
+
+	for (i = 0; i < num_delay_times; i++) {
+		unsigned int divergence = abs(delay - delay_times[i]);
+
+		if (divergence == 0)
+			return i;
+
+		if (divergence < closest_divergence) {
+			closest_divergence = divergence;
+			closest_index = i;
+		}
+	}
+
+	pr_warn("Attempt to set delay %d, closest available %d\n",
+	     delay, delay_times[closest_index]);
+
+	return closest_index;
+}
+
+static unsigned long st_pinconf_bit_to_delay(unsigned int index,
+	const struct st_pctl_data *data, unsigned long output)
+{
+	unsigned int *delay_times;
+	int num_delay_times;
+
+	if (output) {
+		delay_times = data->output_delays;
+		num_delay_times = data->noutput_delays;
+	} else {
+		delay_times = data->input_delays;
+		num_delay_times = data->ninput_delays;
+	}
+
+	if (index < num_delay_times) {
+		return delay_times[index];
+	} else {
+		pr_warn("Delay not found in/out delay list\n");
+		return 0;
+	}
+}
+
+static void st_regmap_field_bit_set_clear_pin(struct regmap_field *field,
+	int enable, int pin)
+{
+	unsigned int val = 0;
+
+	regmap_field_read(field, &val);
+	if (enable)
+		val |= BIT(pin);
+	else
+		val &= ~BIT(pin);
+	regmap_field_write(field, val);
+}
+
+static void st_pinconf_set_retime_packed(struct st_pinctrl *info,
+	struct st_pio_control *pc,	unsigned long config, int pin)
+{
+	const struct st_pctl_data *data = info->data;
+	struct st_retime_packed *rt_p = &pc->rt.rt_p;
+	unsigned int delay;
+
+	st_regmap_field_bit_set_clear_pin(rt_p->clk1notclk0,
+				ST_PINCONF_UNPACK_RT_CLK(config), pin);
+
+	st_regmap_field_bit_set_clear_pin(rt_p->clknotdata,
+				ST_PINCONF_UNPACK_RT_CLKNOTDATA(config), pin);
+
+	st_regmap_field_bit_set_clear_pin(rt_p->double_edge,
+				ST_PINCONF_UNPACK_RT_DOUBLE_EDGE(config), pin);
+
+	st_regmap_field_bit_set_clear_pin(rt_p->invertclk,
+				ST_PINCONF_UNPACK_RT_INVERTCLK(config), pin);
+
+	st_regmap_field_bit_set_clear_pin(rt_p->retime,
+				ST_PINCONF_UNPACK_RT(config), pin);
+
+	delay = st_pinconf_delay_to_bit(ST_PINCONF_UNPACK_RT_DELAY(config),
+					data, config);
+	/* 2 bit delay, lsb */
+	st_regmap_field_bit_set_clear_pin(rt_p->delay_0, delay & 0x1, pin);
+	/* 2 bit delay, msb */
+	st_regmap_field_bit_set_clear_pin(rt_p->delay_1, delay & 0x2, pin);
+
+}
+
+static void st_pinconf_set_retime_dedicated(struct st_pinctrl *info,
+	struct st_pio_control *pc, unsigned long config, int pin)
+{
+	int input	= ST_PINCONF_UNPACK_OE(config) ? 0 : 1;
+	int clk		= ST_PINCONF_UNPACK_RT_CLK(config);
+	int clknotdata	= ST_PINCONF_UNPACK_RT_CLKNOTDATA(config);
+	int double_edge	= ST_PINCONF_UNPACK_RT_DOUBLE_EDGE(config);
+	int invertclk	= ST_PINCONF_UNPACK_RT_INVERTCLK(config);
+	int retime	= ST_PINCONF_UNPACK_RT(config);
+
+	unsigned long delay = st_pinconf_delay_to_bit(
+			ST_PINCONF_UNPACK_RT_DELAY(config),
+			info->data, config);
+	struct st_retime_dedicated *rt_d = &pc->rt.rt_d;
+
+	unsigned long retime_config =
+		((clk) << RT_D_CFG_CLK_SHIFT) |
+		((delay) << RT_D_CFG_DELAY_SHIFT) |
+		((input) << RT_D_CFG_DELAY_INNOTOUT_SHIFT) |
+		((retime) << RT_D_CFG_RETIME_SHIFT) |
+		((clknotdata) << RT_D_CFG_CLKNOTDATA_SHIFT) |
+		((invertclk) << RT_D_CFG_INVERTCLK_SHIFT) |
+		((double_edge) << RT_D_CFG_DOUBLE_EDGE_SHIFT);
+
+	regmap_field_write(rt_d->rt[pin], retime_config);
+}
+
+static void st_pinconf_get_direction(struct st_pio_control *pc,
+	int pin, unsigned long *config)
+{
+	unsigned int oe_value, pu_value, od_value;
+
+	regmap_field_read(pc->oe, &oe_value);
+	regmap_field_read(pc->pu, &pu_value);
+	regmap_field_read(pc->od, &od_value);
+
+	if (oe_value & BIT(pin))
+		ST_PINCONF_PACK_OE(*config);
+	if (pu_value & BIT(pin))
+		ST_PINCONF_PACK_PU(*config);
+	if (od_value & BIT(pin))
+		ST_PINCONF_PACK_OD(*config);
+
+}
+
+static int st_pinconf_get_retime_packed(struct st_pinctrl *info,
+	struct st_pio_control *pc,	int pin, unsigned long *config)
+{
+	const struct st_pctl_data *data = info->data;
+	struct st_retime_packed *rt_p = &pc->rt.rt_p;
+	unsigned int delay_bits, delay, delay0, delay1, val;
+	int output = ST_PINCONF_UNPACK_OE(*config);
+
+	if (!regmap_field_read(rt_p->retime, &val) && (val & BIT(pin)))
+		ST_PINCONF_PACK_RT(*config);
+
+	if (!regmap_field_read(rt_p->clk1notclk0, &val) && (val & BIT(pin)))
+		ST_PINCONF_PACK_RT_CLK(*config, 1);
+
+	if (!regmap_field_read(rt_p->clknotdata, &val) && (val & BIT(pin)))
+		ST_PINCONF_PACK_RT_CLKNOTDATA(*config);
+
+	if (!regmap_field_read(rt_p->double_edge, &val) && (val & BIT(pin)))
+		ST_PINCONF_PACK_RT_DOUBLE_EDGE(*config);
+
+	if (!regmap_field_read(rt_p->invertclk, &val) && (val & BIT(pin)))
+		ST_PINCONF_PACK_RT_INVERTCLK(*config);
+
+	regmap_field_read(rt_p->delay_0, &delay0);
+	regmap_field_read(rt_p->delay_1, &delay1);
+	delay_bits = (((delay1 & BIT(pin)) ? 1 : 0) << 1) |
+			(((delay0 & BIT(pin)) ? 1 : 0));
+	delay =  st_pinconf_bit_to_delay(delay_bits, data, output);
+	ST_PINCONF_PACK_RT_DELAY(*config, delay);
+
+	return 0;
+}
+
+static int st_pinconf_get_retime_dedicated(struct st_pinctrl *info,
+	struct st_pio_control *pc,	int pin, unsigned long *config)
+{
+	unsigned int value;
+	unsigned long delay_bits, delay, rt_clk;
+	int output = ST_PINCONF_UNPACK_OE(*config);
+	struct st_retime_dedicated *rt_d = &pc->rt.rt_d;
+
+	regmap_field_read(rt_d->rt[pin], &value);
+
+	rt_clk = (value & RT_D_CFG_CLK_MASK) >> RT_D_CFG_CLK_SHIFT;
+	ST_PINCONF_PACK_RT_CLK(*config, rt_clk);
+
+	delay_bits = (value & RT_D_CFG_DELAY_MASK) >> RT_D_CFG_DELAY_SHIFT;
+	delay =  st_pinconf_bit_to_delay(delay_bits, info->data, output);
+	ST_PINCONF_PACK_RT_DELAY(*config, delay);
+
+	if (value & RT_D_CFG_CLKNOTDATA_MASK)
+		ST_PINCONF_PACK_RT_CLKNOTDATA(*config);
+
+	if (value & RT_D_CFG_DOUBLE_EDGE_MASK)
+		ST_PINCONF_PACK_RT_DOUBLE_EDGE(*config);
+
+	if (value & RT_D_CFG_INVERTCLK_MASK)
+		ST_PINCONF_PACK_RT_INVERTCLK(*config);
+
+	if (value & RT_D_CFG_RETIME_MASK)
+		ST_PINCONF_PACK_RT(*config);
+
+	return 0;
+}
+
+/* GPIO related functions */
+
+static inline void __st_gpio_set(struct st_gpio_bank *bank,
+	unsigned offset, int value)
+{
+	if (value)
+		writel(BIT(offset), bank->base + REG_PIO_SET_POUT);
+	else
+		writel(BIT(offset), bank->base + REG_PIO_CLR_POUT);
+}
+
+static void st_gpio_direction(struct st_gpio_bank *bank,
+		unsigned int gpio, unsigned int direction)
+{
+	int offset = st_gpio_pin(gpio);
+	int i = 0;
+	/**
+	 * There are three configuration registers (PIOn_PC0, PIOn_PC1
+	 * and PIOn_PC2) for each port. These are used to configure the
+	 * PIO port pins. Each pin can be configured as an input, output,
+	 * bidirectional, or alternative function pin. Three bits, one bit
+	 * from each of the three registers, configure the corresponding bit of
+	 * the port. Valid bit settings is:
+	 *
+	 * PC2		PC1		PC0	Direction.
+	 * 0		0		0	[Input Weak pull-up]
+	 * 0		0 or 1		1	[Bidirection]
+	 * 0		1		0	[Output]
+	 * 1		0		0	[Input]
+	 *
+	 * PIOn_SET_PC and PIOn_CLR_PC registers are used to set and clear bits
+	 * individually.
+	 */
+	for (i = 0; i <= 2; i++) {
+		if (direction & BIT(i))
+			writel(BIT(offset), bank->base + REG_PIO_SET_PC(i));
+		else
+			writel(BIT(offset), bank->base + REG_PIO_CLR_PC(i));
+	}
+}
+
+static int st_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+	return pinctrl_request_gpio(chip->base + offset);
+}
+
+static void st_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+	pinctrl_free_gpio(chip->base + offset);
+}
+
+static int st_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+	struct st_gpio_bank *bank = gpio_chip_to_bank(chip);
+
+	return !!(readl(bank->base + REG_PIO_PIN) & BIT(offset));
+}
+
+static void st_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+	struct st_gpio_bank *bank = gpio_chip_to_bank(chip);
+	__st_gpio_set(bank, offset, value);
+}
+
+static int st_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+	pinctrl_gpio_direction_input(chip->base + offset);
+
+	return 0;
+}
+
+static int st_gpio_direction_output(struct gpio_chip *chip,
+	unsigned offset, int value)
+{
+	struct st_gpio_bank *bank = gpio_chip_to_bank(chip);
+
+	__st_gpio_set(bank, offset, value);
+	pinctrl_gpio_direction_output(chip->base + offset);
+
+	return 0;
+}
+
+static int st_gpio_xlate(struct gpio_chip *gc,
+			const struct of_phandle_args *gpiospec, u32 *flags)
+{
+	if (WARN_ON(gc->of_gpio_n_cells < 1))
+		return -EINVAL;
+
+	if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
+		return -EINVAL;
+
+	if (gpiospec->args[0] > gc->ngpio)
+		return -EINVAL;
+
+	return gpiospec->args[0];
+}
+
+/* Pinctrl Groups */
+static int st_pctl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+	return info->ngroups;
+}
+
+static const char *st_pctl_get_group_name(struct pinctrl_dev *pctldev,
+				       unsigned selector)
+{
+	struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+	return info->groups[selector].name;
+}
+
+static int st_pctl_get_group_pins(struct pinctrl_dev *pctldev,
+	unsigned selector, const unsigned **pins, unsigned *npins)
+{
+	struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+	if (selector >= info->ngroups)
+		return -EINVAL;
+
+	*pins = info->groups[selector].pins;
+	*npins = info->groups[selector].npins;
+
+	return 0;
+}
+
+static const inline struct st_pctl_group *st_pctl_find_group_by_name(
+	const struct st_pinctrl *info, const char *name)
+{
+	int i;
+
+	for (i = 0; i < info->ngroups; i++) {
+		if (!strcmp(info->groups[i].name, name))
+			return &info->groups[i];
+	}
+
+	return NULL;
+}
+
+static int st_pctl_dt_node_to_map(struct pinctrl_dev *pctldev,
+	struct device_node *np, struct pinctrl_map **map, unsigned *num_maps)
+{
+	struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+	const struct st_pctl_group *grp;
+	struct pinctrl_map *new_map;
+	struct device_node *parent;