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: Esteban Blanc <eblanc@xxxxxxxxxxxx> --- drivers/pinctrl/Kconfig | 15 ++ drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-tps6594.c | 368 ++++++++++++++++++++++++++++++ include/linux/mfd/tps6594.h | 1 + 4 files changed, 385 insertions(+) create mode 100644 drivers/pinctrl/pinctrl-tps6594.c diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 5787c579dcf6..d3cff8d27e5d 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -480,6 +480,21 @@ 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 MFD_TPS6594 + default MFD_TPS6594 + select PINMUX + select GPIOLIB + select REGMAP + select GPIO_REGMAP + 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 diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index e196c6e324ad..28271a8d5275 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -49,6 +49,7 @@ 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 diff --git a/drivers/pinctrl/pinctrl-tps6594.c b/drivers/pinctrl/pinctrl-tps6594.c new file mode 100644 index 000000000000..a1fcb9fd793b --- /dev/null +++ b/drivers/pinctrl/pinctrl-tps6594.c @@ -0,0 +1,368 @@ +// 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/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; + } + + return 0; +} + +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 struct platform_driver tps6594_pinctrl_driver = { + .probe = tps6594_pinctrl_probe, + .driver = { + .name = "tps6594-pinctrl", + }, +}; +module_platform_driver(tps6594_pinctrl_driver); + +MODULE_ALIAS("platform:tps6594-pinctrl"); +MODULE_AUTHOR("Esteban Blanc <eblanc@xxxxxxxxxxxx>"); +MODULE_DESCRIPTION("TPS6594 pinctrl and GPIO driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/tps6594.h b/include/linux/mfd/tps6594.h index 3f7c5e23cd4c..55a5701e6f7f 100644 --- a/include/linux/mfd/tps6594.h +++ b/include/linux/mfd/tps6594.h @@ -47,6 +47,7 @@ enum pmic_id { #define TPS6594_REG_VMON2_PG_WINDOW 0x2f #define TPS6594_REG_VMON2_PG_LEVEL 0x30 +// Used to compute the register address of GPIO1_CONF to GPIO11_CONF #define TPS6594_REG_GPIOX_CONF(gpio_inst) (0x31 + (gpio_inst)) #define TPS6594_REG_NPWRON_CONF 0x3c #define TPS6594_REG_GPIO_OUT_1 0x3d -- 2.40.1
