Commit 901b277e authored by Esteban Blanc's avatar Esteban Blanc Committed by Linus Walleij
Browse files

pinctrl: tps6594: Add driver for TPS6594 pinctrl and GPIOs 



TI TPS6594 PMIC has 11 GPIOs which can be used
for different functions.

This patch adds a pinctrl and GPIO drivers in
order to use those functions.

Signed-off-by: default avatarEsteban Blanc <eblanc@baylibre.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20231108104124.2818275-1-eblanc@baylibre.com


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 6ea5c72b

drivers/pinctrl/Kconfig

+16 −0
Original line number Diff line number Diff line
@@ -469,6 +469,22 @@ config PINCTRL_TB10X 
	depends on OF && ARC_PLAT_TB10X

	select GPIOLIB



config PINCTRL_TPS6594

	tristate "Pinctrl and GPIO driver for TI TPS6594 PMIC"

	depends on OF && MFD_TPS6594

	default MFD_TPS6594

	select PINMUX

	select GPIOLIB

	select REGMAP

	select GPIO_REGMAP

	select GENERIC_PINCONF

	help

	  Say Y to select the pinmuxing and GPIOs driver for the TPS6594

	  PMICs chip family.



	  This driver can also be built as a module

	  called tps6594-pinctrl.



config PINCTRL_ZYNQ

	bool "Pinctrl driver for Xilinx Zynq"

	depends on ARCH_ZYNQ

drivers/pinctrl/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o 
obj-$(CONFIG_PINCTRL_STMFX) 	+= pinctrl-stmfx.o

obj-$(CONFIG_PINCTRL_SX150X)	+= pinctrl-sx150x.o

obj-$(CONFIG_PINCTRL_TB10X)	+= pinctrl-tb10x.o

obj-$(CONFIG_PINCTRL_TPS6594)	+= pinctrl-tps6594.o

obj-$(CONFIG_PINCTRL_ZYNQMP)	+= pinctrl-zynqmp.o

obj-$(CONFIG_PINCTRL_ZYNQ)	+= pinctrl-zynq.o

drivers/pinctrl/pinctrl-tps6594.c

0 → 100644
+373 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * Pinmux and GPIO driver for tps6594 PMIC

 *

 * Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/

 */



#include <linux/gpio/driver.h>

#include <linux/gpio/regmap.h>

#include <linux/module.h>

#include <linux/pinctrl/pinmux.h>

#include <linux/platform_device.h>

#include <linux/mod_devicetable.h>



#include <linux/mfd/tps6594.h>



#define TPS6594_PINCTRL_PINS_NB 11



#define TPS6594_PINCTRL_GPIO_FUNCTION 0

#define TPS6594_PINCTRL_SCL_I2C2_CS_SPI_FUNCTION 1

#define TPS6594_PINCTRL_TRIG_WDOG_FUNCTION 1

#define TPS6594_PINCTRL_CLK32KOUT_FUNCTION 1

#define TPS6594_PINCTRL_SCLK_SPMI_FUNCTION 1

#define TPS6594_PINCTRL_SDATA_SPMI_FUNCTION 1

#define TPS6594_PINCTRL_NERR_MCU_FUNCTION 1

#define TPS6594_PINCTRL_PDOG_FUNCTION 1

#define TPS6594_PINCTRL_SYNCCLKIN_FUNCTION 1

#define TPS6594_PINCTRL_NRSTOUT_SOC_FUNCTION 2

#define TPS6594_PINCTRL_SYNCCLKOUT_FUNCTION 2

#define TPS6594_PINCTRL_SDA_I2C2_SDO_SPI_FUNCTION 2

#define TPS6594_PINCTRL_NERR_SOC_FUNCTION 2

#define TPS6594_PINCTRL_DISABLE_WDOG_FUNCTION 3

#define TPS6594_PINCTRL_NSLEEP1_FUNCTION 4

#define TPS6594_PINCTRL_NSLEEP2_FUNCTION 5

#define TPS6594_PINCTRL_WKUP1_FUNCTION 6

#define TPS6594_PINCTRL_WKUP2_FUNCTION 7



/* Special muxval for recalcitrant pins */

#define TPS6594_PINCTRL_DISABLE_WDOG_FUNCTION_GPIO8 2

#define TPS6594_PINCTRL_SYNCCLKOUT_FUNCTION_GPIO8 3

#define TPS6594_PINCTRL_CLK32KOUT_FUNCTION_GPIO9 3



#define TPS6594_OFFSET_GPIO_SEL 5



#define FUNCTION(fname, v)									\

{											\

	.pinfunction = PINCTRL_PINFUNCTION(#fname,					\

					tps6594_##fname##_func_group_names,		\

					ARRAY_SIZE(tps6594_##fname##_func_group_names)),\

	.muxval = v,									\

}



static const struct pinctrl_pin_desc tps6594_pins[TPS6594_PINCTRL_PINS_NB] = {

	PINCTRL_PIN(0, "GPIO0"),   PINCTRL_PIN(1, "GPIO1"),

	PINCTRL_PIN(2, "GPIO2"),   PINCTRL_PIN(3, "GPIO3"),

	PINCTRL_PIN(4, "GPIO4"),   PINCTRL_PIN(5, "GPIO5"),

	PINCTRL_PIN(6, "GPIO6"),   PINCTRL_PIN(7, "GPIO7"),

	PINCTRL_PIN(8, "GPIO8"),   PINCTRL_PIN(9, "GPIO9"),

	PINCTRL_PIN(10, "GPIO10"),

};



static const char *const tps6594_gpio_func_group_names[] = {

	"GPIO0", "GPIO1", "GPIO2", "GPIO3", "GPIO4", "GPIO5",

	"GPIO6", "GPIO7", "GPIO8", "GPIO9", "GPIO10",

};



static const char *const tps6594_nsleep1_func_group_names[] = {

	"GPIO0", "GPIO1", "GPIO2", "GPIO3", "GPIO4", "GPIO5",

	"GPIO6", "GPIO7", "GPIO8", "GPIO9", "GPIO10",

};



static const char *const tps6594_nsleep2_func_group_names[] = {

	"GPIO0", "GPIO1", "GPIO2", "GPIO3", "GPIO4", "GPIO5",

	"GPIO6", "GPIO7", "GPIO8", "GPIO9", "GPIO10",

};



static const char *const tps6594_wkup1_func_group_names[] = {

	"GPIO0", "GPIO1", "GPIO2", "GPIO3", "GPIO4", "GPIO5",

	"GPIO6", "GPIO7", "GPIO8", "GPIO9", "GPIO10",

};



static const char *const tps6594_wkup2_func_group_names[] = {

	"GPIO0", "GPIO1", "GPIO2", "GPIO3", "GPIO4", "GPIO5",

	"GPIO6", "GPIO7", "GPIO8", "GPIO9", "GPIO10",

};



static const char *const tps6594_scl_i2c2_cs_spi_func_group_names[] = {

	"GPIO0",

	"GPIO1",

};



static const char *const tps6594_nrstout_soc_func_group_names[] = {

	"GPIO0",

	"GPIO10",

};



static const char *const tps6594_trig_wdog_func_group_names[] = {

	"GPIO1",

	"GPIO10",

};



static const char *const tps6594_sda_i2c2_sdo_spi_func_group_names[] = {

	"GPIO1",

};



static const char *const tps6594_clk32kout_func_group_names[] = {

	"GPIO2",

	"GPIO3",

	"GPIO7",

};



static const char *const tps6594_nerr_soc_func_group_names[] = {

	"GPIO2",

};



static const char *const tps6594_sclk_spmi_func_group_names[] = {

	"GPIO4",

};



static const char *const tps6594_sdata_spmi_func_group_names[] = {

	"GPIO5",

};



static const char *const tps6594_nerr_mcu_func_group_names[] = {

	"GPIO6",

};



static const char *const tps6594_syncclkout_func_group_names[] = {

	"GPIO7",

	"GPIO9",

};



static const char *const tps6594_disable_wdog_func_group_names[] = {

	"GPIO7",

	"GPIO8",

};



static const char *const tps6594_pdog_func_group_names[] = {

	"GPIO8",

};



static const char *const tps6594_syncclkin_func_group_names[] = {

	"GPIO9",

};



struct tps6594_pinctrl_function {

	struct pinfunction pinfunction;

	u8 muxval;

};



static const struct tps6594_pinctrl_function pinctrl_functions[] = {

	FUNCTION(gpio, TPS6594_PINCTRL_GPIO_FUNCTION),

	FUNCTION(nsleep1, TPS6594_PINCTRL_NSLEEP1_FUNCTION),

	FUNCTION(nsleep2, TPS6594_PINCTRL_NSLEEP2_FUNCTION),

	FUNCTION(wkup1, TPS6594_PINCTRL_WKUP1_FUNCTION),

	FUNCTION(wkup2, TPS6594_PINCTRL_WKUP2_FUNCTION),

	FUNCTION(scl_i2c2_cs_spi, TPS6594_PINCTRL_SCL_I2C2_CS_SPI_FUNCTION),

	FUNCTION(nrstout_soc, TPS6594_PINCTRL_NRSTOUT_SOC_FUNCTION),

	FUNCTION(trig_wdog, TPS6594_PINCTRL_TRIG_WDOG_FUNCTION),

	FUNCTION(sda_i2c2_sdo_spi, TPS6594_PINCTRL_SDA_I2C2_SDO_SPI_FUNCTION),

	FUNCTION(clk32kout, TPS6594_PINCTRL_CLK32KOUT_FUNCTION),

	FUNCTION(nerr_soc, TPS6594_PINCTRL_NERR_SOC_FUNCTION),

	FUNCTION(sclk_spmi, TPS6594_PINCTRL_SCLK_SPMI_FUNCTION),

	FUNCTION(sdata_spmi, TPS6594_PINCTRL_SDATA_SPMI_FUNCTION),

	FUNCTION(nerr_mcu, TPS6594_PINCTRL_NERR_MCU_FUNCTION),

	FUNCTION(syncclkout, TPS6594_PINCTRL_SYNCCLKOUT_FUNCTION),

	FUNCTION(disable_wdog, TPS6594_PINCTRL_DISABLE_WDOG_FUNCTION),

	FUNCTION(pdog, TPS6594_PINCTRL_PDOG_FUNCTION),

	FUNCTION(syncclkin, TPS6594_PINCTRL_SYNCCLKIN_FUNCTION),

};



struct tps6594_pinctrl {

	struct tps6594 *tps;

	struct gpio_regmap *gpio_regmap;

	struct pinctrl_dev *pctl_dev;

	const struct tps6594_pinctrl_function *funcs;

	const struct pinctrl_pin_desc *pins;

};



static int tps6594_gpio_regmap_xlate(struct gpio_regmap *gpio,

				     unsigned int base, unsigned int offset,

				     unsigned int *reg, unsigned int *mask)

{

	unsigned int line = offset % 8;

	unsigned int stride = offset / 8;



	switch (base) {

	case TPS6594_REG_GPIOX_CONF(0):

		*reg = TPS6594_REG_GPIOX_CONF(offset);

		*mask = TPS6594_BIT_GPIO_DIR;

		return 0;

	case TPS6594_REG_GPIO_IN_1:

	case TPS6594_REG_GPIO_OUT_1:

		*reg = base + stride;

		*mask = BIT(line);

		return 0;

	default:

		return -EINVAL;

	}

}



static int tps6594_pmx_func_cnt(struct pinctrl_dev *pctldev)

{

	return ARRAY_SIZE(pinctrl_functions);

}



static const char *tps6594_pmx_func_name(struct pinctrl_dev *pctldev,

					 unsigned int selector)

{

	struct tps6594_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);



	return pinctrl->funcs[selector].pinfunction.name;

}



static int tps6594_pmx_func_groups(struct pinctrl_dev *pctldev,

				   unsigned int selector,

				   const char *const **groups,

				   unsigned int *num_groups)

{

	struct tps6594_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);



	*groups = pinctrl->funcs[selector].pinfunction.groups;

	*num_groups = pinctrl->funcs[selector].pinfunction.ngroups;



	return 0;

}



static int tps6594_pmx_set(struct tps6594_pinctrl *pinctrl, unsigned int pin,

			   u8 muxval)

{

	u8 mux_sel_val = muxval << TPS6594_OFFSET_GPIO_SEL;



	return regmap_update_bits(pinctrl->tps->regmap,

				  TPS6594_REG_GPIOX_CONF(pin),

				  TPS6594_MASK_GPIO_SEL, mux_sel_val);

}



static int tps6594_pmx_set_mux(struct pinctrl_dev *pctldev,

			       unsigned int function, unsigned int group)

{

	struct tps6594_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);

	u8 muxval = pinctrl->funcs[function].muxval;



	/* Some pins don't have the same muxval for the same function... */

	if (group == 8) {

		if (muxval == TPS6594_PINCTRL_DISABLE_WDOG_FUNCTION)

			muxval = TPS6594_PINCTRL_DISABLE_WDOG_FUNCTION_GPIO8;

		else if (muxval == TPS6594_PINCTRL_SYNCCLKOUT_FUNCTION)

			muxval = TPS6594_PINCTRL_SYNCCLKOUT_FUNCTION_GPIO8;

	} else if (group == 9) {

		if (muxval == TPS6594_PINCTRL_CLK32KOUT_FUNCTION)

			muxval = TPS6594_PINCTRL_CLK32KOUT_FUNCTION_GPIO9;

	}



	return tps6594_pmx_set(pinctrl, group, muxval);

}



static int tps6594_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,

					  struct pinctrl_gpio_range *range,

					  unsigned int offset, bool input)

{

	struct tps6594_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);

	u8 muxval = pinctrl->funcs[TPS6594_PINCTRL_GPIO_FUNCTION].muxval;



	return tps6594_pmx_set(pinctrl, offset, muxval);

}



static const struct pinmux_ops tps6594_pmx_ops = {

	.get_functions_count = tps6594_pmx_func_cnt,

	.get_function_name = tps6594_pmx_func_name,

	.get_function_groups = tps6594_pmx_func_groups,

	.set_mux = tps6594_pmx_set_mux,

	.gpio_set_direction = tps6594_pmx_gpio_set_direction,

	.strict = true,

};



static int tps6594_groups_cnt(struct pinctrl_dev *pctldev)

{

	return ARRAY_SIZE(tps6594_pins);

}



static int tps6594_group_pins(struct pinctrl_dev *pctldev,

			      unsigned int selector, const unsigned int **pins,

			      unsigned int *num_pins)

{

	struct tps6594_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);



	*pins = &pinctrl->pins[selector].number;

	*num_pins = 1;



	return 0;

}



static const char *tps6594_group_name(struct pinctrl_dev *pctldev,

				      unsigned int selector)

{

	struct tps6594_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctldev);



	return pinctrl->pins[selector].name;

}



static const struct pinctrl_ops tps6594_pctrl_ops = {

	.dt_node_to_map = pinconf_generic_dt_node_to_map_group,

	.dt_free_map = pinconf_generic_dt_free_map,

	.get_groups_count = tps6594_groups_cnt,

	.get_group_name = tps6594_group_name,

	.get_group_pins = tps6594_group_pins,

};



static int tps6594_pinctrl_probe(struct platform_device *pdev)

{

	struct tps6594 *tps = dev_get_drvdata(pdev->dev.parent);

	struct device *dev = &pdev->dev;

	struct tps6594_pinctrl *pinctrl;

	struct pinctrl_desc *pctrl_desc;

	struct gpio_regmap_config config = {};



	pctrl_desc = devm_kzalloc(dev, sizeof(*pctrl_desc), GFP_KERNEL);

	if (!pctrl_desc)

		return -ENOMEM;

	pctrl_desc->name = dev_name(dev);

	pctrl_desc->owner = THIS_MODULE;

	pctrl_desc->pins = tps6594_pins;

	pctrl_desc->npins = ARRAY_SIZE(tps6594_pins);

	pctrl_desc->pctlops = &tps6594_pctrl_ops;

	pctrl_desc->pmxops = &tps6594_pmx_ops;



	pinctrl = devm_kzalloc(dev, sizeof(*pinctrl), GFP_KERNEL);

	if (!pinctrl)

		return -ENOMEM;

	pinctrl->tps = dev_get_drvdata(dev->parent);

	pinctrl->funcs = pinctrl_functions;

	pinctrl->pins = tps6594_pins;

	pinctrl->pctl_dev = devm_pinctrl_register(dev, pctrl_desc, pinctrl);

	if (IS_ERR(pinctrl->pctl_dev))

		return dev_err_probe(dev, PTR_ERR(pinctrl->pctl_dev),

				     "Couldn't register pinctrl driver\n");



	config.parent = tps->dev;

	config.regmap = tps->regmap;

	config.ngpio = TPS6594_PINCTRL_PINS_NB;

	config.ngpio_per_reg = 8;

	config.reg_dat_base = TPS6594_REG_GPIO_IN_1;

	config.reg_set_base = TPS6594_REG_GPIO_OUT_1;

	config.reg_dir_out_base = TPS6594_REG_GPIOX_CONF(0);

	config.reg_mask_xlate = tps6594_gpio_regmap_xlate;



	pinctrl->gpio_regmap = devm_gpio_regmap_register(dev, &config);

	if (IS_ERR(pinctrl->gpio_regmap))

		return dev_err_probe(dev, PTR_ERR(pinctrl->gpio_regmap),

				     "Couldn't register gpio_regmap driver\n");



	return 0;

}



static const struct platform_device_id tps6594_pinctrl_id_table[] = {

	{ "tps6594-pinctrl", },

	{}

};

MODULE_DEVICE_TABLE(platform, tps6594_pinctrl_id_table);



static struct platform_driver tps6594_pinctrl_driver = {

	.probe = tps6594_pinctrl_probe,

	.driver = {

		.name = "tps6594-pinctrl",

	},

	.id_table = tps6594_pinctrl_id_table,

};

module_platform_driver(tps6594_pinctrl_driver);



MODULE_AUTHOR("Esteban Blanc <eblanc@baylibre.com>");

MODULE_DESCRIPTION("TPS6594 pinctrl and GPIO driver");

MODULE_LICENSE("GPL");