Add support for TPS6594X PMICs GPIO interface that has 11 that can be configured as input or outputs. Signed-off-by: Matt Ranostay <mranostay@xxxxxx> --- drivers/gpio/Kconfig | 9 +++++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-tps6594x.c | 78 ++++++++++++++++++++++++++++++++++++ include/linux/mfd/tps6594x.h | 4 ++ 4 files changed, 92 insertions(+) create mode 100644 drivers/gpio/gpio-tps6594x.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index ec7cfd4f52b1..6b65c790efe7 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -1405,6 +1405,15 @@ config GPIO_TPS65912 help This driver supports TPS65912 GPIO chip. +config GPIO_TPS6594X + tristate "TI TPS6594X GPIO driver" + depends on MFD_TPS6594X || COMPILE_TEST + select REGMAP + select GPIO_REGMAP + help + Select this option to enable GPIO driver for the TPS6954X + PMIC chip family. There are 11 GPIOs that can be configured. + config GPIO_TPS68470 tristate "TPS68470 GPIO" depends on INTEL_SKL_INT3472 diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 010587025fc8..9892f9adc5b5 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -159,6 +159,7 @@ obj-$(CONFIG_GPIO_TPS65218) += gpio-tps65218.o obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o +obj-$(CONFIG_GPIO_TPS6594X) += gpio-tps6594x.o obj-$(CONFIG_GPIO_TPS68470) += gpio-tps68470.o obj-$(CONFIG_GPIO_TQMX86) += gpio-tqmx86.o obj-$(CONFIG_GPIO_TS4800) += gpio-ts4800.o diff --git a/drivers/gpio/gpio-tps6594x.c b/drivers/gpio/gpio-tps6594x.c new file mode 100644 index 000000000000..733fedba70cb --- /dev/null +++ b/drivers/gpio/gpio-tps6594x.c @@ -0,0 +1,78 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * GPIO driver for TI TPS6594x PMICs + * + * Copyright (C) 2022 Texas Instruments Incorporated - http://www.ti.com/ + */ + +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#include <linux/gpio/regmap.h> +#include <linux/gpio/driver.h> +#include <linux/mfd/tps6594x.h> + +#define GPIO_BANK_SIZE 8 +#define GPIO_CFG_MASK BIT(0) + +static int tps6594x_regmap_xlate(struct gpio_regmap *gpio, + unsigned int base, unsigned int offset, + unsigned int *reg, unsigned int *mask) +{ + if (base == TPS6594X_GPIO_CONF) { + *reg = base + offset; + *mask = GPIO_CFG_MASK; + } else { + unsigned int line = offset % GPIO_BANK_SIZE; + unsigned int stride = offset / GPIO_BANK_SIZE; + + *reg = base + stride; + *mask = BIT(line); + } + + return 0; +} + +static int tps6594x_gpio_probe(struct platform_device *pdev) +{ + struct gpio_regmap_config config = {0}; + struct regmap *regmap; + + regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!regmap) + return -ENODEV; + + config.regmap = regmap; + config.parent = &pdev->dev; + config.ngpio = 11; + config.ngpio_per_reg = GPIO_BANK_SIZE; + + config.reg_dat_base = TPS6594X_GPIO_IN; + config.reg_set_base = TPS6594X_GPIO_OUT; + config.reg_dir_out_base = TPS6594X_GPIO_CONF; + config.reg_mask_xlate = tps6594x_regmap_xlate; + + return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(&pdev->dev, &config)); +} + +static const struct of_device_id of_tps6594x_gpio_match[] = { + { .compatible = "ti,tps6594-gpio", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_tps6594x_gpio_match); + +static struct platform_driver tps6594x_gpio_driver = { + .driver = { + .name = "tps6594-gpio", + .of_match_table = of_tps6594x_gpio_match, + }, + .probe = tps6594x_gpio_probe, +}; +module_platform_driver(tps6594x_gpio_driver); + +MODULE_ALIAS("platform:tps6594-gpio"); +MODULE_AUTHOR("Matt Ranostay <mranostay@xxxxxx>"); +MODULE_DESCRIPTION("TPS6594X GPIO driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/tps6594x.h b/include/linux/mfd/tps6594x.h index 5a6af0da9223..155618e4d5d0 100644 --- a/include/linux/mfd/tps6594x.h +++ b/include/linux/mfd/tps6594x.h @@ -21,6 +21,10 @@ #define TPS6594X_FSM_I2C_TRIGGERS 0x85 #define TPS6594X_FSM_NSLEEP_TRIGGERS 0x86 +#define TPS6594X_GPIO_CONF 0x31 +#define TPS6594X_GPIO_OUT 0x3d +#define TPS6594X_GPIO_IN 0x3f + #define TPS6594X_RTC_SECONDS 0xb5 #define TPS6594X_RTC_MINUTES 0xb6 #define TPS6594X_RTC_HOURS 0xb7 -- 2.38.GIT
