// SPDX-License-Identifier: GPL-2.0 /* * Pinmux and GPIO driver for tps6594 PMIC * * Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/ */ #include #include #include #include #include #include #include #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 "); MODULE_DESCRIPTION("TPS6594 pinctrl and GPIO driver"); MODULE_LICENSE("GPL");