diff options
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-axp209.txt | 49 | ||||
| -rw-r--r-- | drivers/gpio/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/gpio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpio/gpio-axp209.c | 188 | ||||
| -rw-r--r-- | drivers/pinctrl/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/pinctrl/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-axp209.c | 476 |
7 files changed, 534 insertions, 197 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-axp209.txt b/Documentation/devicetree/bindings/gpio/gpio-axp209.txt index a6611304dd3c..fc42b2caa06d 100644 --- a/Documentation/devicetree/bindings/gpio/gpio-axp209.txt +++ b/Documentation/devicetree/bindings/gpio/gpio-axp209.txt @@ -1,10 +1,17 @@ -AXP209 GPIO controller +AXP209 GPIO & pinctrl controller This driver follows the usual GPIO bindings found in Documentation/devicetree/bindings/gpio/gpio.txt +This driver follows the usual pinctrl bindings found in +Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt + +This driver employs the per-pin muxing pattern. + Required properties: -- compatible: Should be "x-powers,axp209-gpio" +- compatible: Should be one of: + - "x-powers,axp209-gpio" + - "x-powers,axp813-gpio" - #gpio-cells: Should be two. The first cell is the pin number and the second is the GPIO flags. - gpio-controller: Marks the device node as a GPIO controller. @@ -28,3 +35,41 @@ axp209: pmic@34 { #gpio-cells = <2>; }; }; + +The GPIOs can be muxed to other functions and therefore, must be a subnode of +axp_gpio. + +Example: + +&axp_gpio { + gpio0_adc: gpio0-adc { + pins = "GPIO0"; + function = "adc"; + }; +}; + +&example_node { + pinctrl-names = "default"; + pinctrl-0 = <&gpio0_adc>; +}; + +GPIOs and their functions +------------------------- + +Each GPIO is independent from the other (i.e. GPIO0 in gpio_in function does +not force GPIO1 and GPIO2 to be in gpio_in function as well). + +axp209 +------ +GPIO | Functions +------------------------ +GPIO0 | gpio_in, gpio_out, ldo, adc +GPIO1 | gpio_in, gpio_out, ldo, adc +GPIO2 | gpio_in, gpio_out + +axp813 +------ +GPIO | Functions +------------------------ +GPIO0 | gpio_in, gpio_out, ldo, adc +GPIO1 | gpio_in, gpio_out, ldo diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index d6a8e851ad13..395669bfcc26 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -122,12 +122,6 @@ config GPIO_ATH79 Select this option to enable GPIO driver for Atheros AR71XX/AR724X/AR913X SoC devices. -config GPIO_AXP209 - tristate "X-Powers AXP209 PMIC GPIO Support" - depends on MFD_AXP20X - help - Say yes to enable GPIO support for the AXP209 PMIC - config GPIO_BCM_KONA bool "Broadcom Kona GPIO" depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST) diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 4bc24febb889..bc5dd673fa11 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -32,7 +32,6 @@ obj-$(CONFIG_GPIO_AMDPT) += gpio-amdpt.o obj-$(CONFIG_GPIO_ARIZONA) += gpio-arizona.o obj-$(CONFIG_GPIO_ATH79) += gpio-ath79.o obj-$(CONFIG_GPIO_ASPEED) += gpio-aspeed.o -obj-$(CONFIG_GPIO_AXP209) += gpio-axp209.o obj-$(CONFIG_GPIO_BCM_KONA) += gpio-bcm-kona.o obj-$(CONFIG_GPIO_BD9571MWV) += gpio-bd9571mwv.o obj-$(CONFIG_GPIO_BRCMSTB) += gpio-brcmstb.o diff --git a/drivers/gpio/gpio-axp209.c b/drivers/gpio/gpio-axp209.c deleted file mode 100644 index 4a346b7b4172..000000000000 --- a/drivers/gpio/gpio-axp209.c +++ /dev/null @@ -1,188 +0,0 @@ -/* - * AXP20x GPIO driver - * - * Copyright (C) 2016 Maxime Ripard <maxime.ripard@free-electrons.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ - -#include <linux/bitops.h> -#include <linux/device.h> -#include <linux/gpio/driver.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/kernel.h> -#include <linux/mfd/axp20x.h> -#include <linux/module.h> -#include <linux/of.h> -#include <linux/platform_device.h> -#include <linux/regmap.h> -#include <linux/slab.h> - -#define AXP20X_GPIO_FUNCTIONS 0x7 -#define AXP20X_GPIO_FUNCTION_OUT_LOW 0 -#define AXP20X_GPIO_FUNCTION_OUT_HIGH 1 -#define AXP20X_GPIO_FUNCTION_INPUT 2 - -struct axp20x_gpio { - struct gpio_chip chip; - struct regmap *regmap; -}; - -static int axp20x_gpio_get_reg(unsigned offset) -{ - switch (offset) { - case 0: - return AXP20X_GPIO0_CTRL; - case 1: - return AXP20X_GPIO1_CTRL; - case 2: - return AXP20X_GPIO2_CTRL; - } - - return -EINVAL; -} - -static int axp20x_gpio_input(struct gpio_chip *chip, unsigned offset) -{ - struct axp20x_gpio *gpio = gpiochip_get_data(chip); - int reg; - - reg = axp20x_gpio_get_reg(offset); - if (reg < 0) - return reg; - - return regmap_update_bits(gpio->regmap, reg, - AXP20X_GPIO_FUNCTIONS, - AXP20X_GPIO_FUNCTION_INPUT); -} - -static int axp20x_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - struct axp20x_gpio *gpio = gpiochip_get_data(chip); - unsigned int val; - int ret; - - ret = regmap_read(gpio->regmap, AXP20X_GPIO20_SS, &val); - if (ret) - return ret; - - return !!(val & BIT(offset + 4)); -} - -static int axp20x_gpio_get_direction(struct gpio_chip *chip, unsigned offset) -{ - struct axp20x_gpio *gpio = gpiochip_get_data(chip); - unsigned int val; - int reg, ret; - - reg = axp20x_gpio_get_reg(offset); - if (reg < 0) - return reg; - - ret = regmap_read(gpio->regmap, reg, &val); - if (ret) - return ret; - - /* - * This shouldn't really happen if the pin is in use already, - * or if it's not in use yet, it doesn't matter since we're - * going to change the value soon anyway. Default to output. - */ - if ((val & AXP20X_GPIO_FUNCTIONS) > 2) - return 0; - - /* - * The GPIO directions are the three lowest values. - * 2 is input, 0 and 1 are output - */ - return val & 2; -} - -static int axp20x_gpio_output(struct gpio_chip *chip, unsigned offset, - int value) -{ - struct axp20x_gpio *gpio = gpiochip_get_data(chip); - int reg; - - reg = axp20x_gpio_get_reg(offset); - if (reg < 0) - return reg; - - return regmap_update_bits(gpio->regmap, reg, - AXP20X_GPIO_FUNCTIONS, - value ? AXP20X_GPIO_FUNCTION_OUT_HIGH - : AXP20X_GPIO_FUNCTION_OUT_LOW); -} - -static void axp20x_gpio_set(struct gpio_chip *chip, unsigned offset, - int value) -{ - axp20x_gpio_output(chip, offset, value); -} - -static int axp20x_gpio_probe(struct platform_device *pdev) -{ - struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); - struct axp20x_gpio *gpio; - int ret; - - if (!of_device_is_available(pdev->dev.of_node)) - return -ENODEV; - - if (!axp20x) { - dev_err(&pdev->dev, "Parent drvdata not set\n"); - return -EINVAL; - } - - gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); - if (!gpio) - return -ENOMEM; - - gpio->chip.base = -1; - gpio->chip.can_sleep = true; - gpio->chip.parent = &pdev->dev; - gpio->chip.label = dev_name(&pdev->dev); - gpio->chip.owner = THIS_MODULE; - gpio->chip.get = axp20x_gpio_get; - gpio->chip.get_direction = axp20x_gpio_get_direction; - gpio->chip.set = axp20x_gpio_set; - gpio->chip.direction_input = axp20x_gpio_input; - gpio->chip.direction_output = axp20x_gpio_output; - gpio->chip.ngpio = 3; - - gpio->regmap = axp20x->regmap; - - ret = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio); - if (ret) { - dev_err(&pdev->dev, "Failed to register GPIO chip\n"); - return ret; - } - - dev_info(&pdev->dev, "AXP209 GPIO driver loaded\n"); - - return 0; -} - -static const struct of_device_id axp20x_gpio_match[] = { - { .compatible = "x-powers,axp209-gpio" }, - { } -}; -MODULE_DEVICE_TABLE(of, axp20x_gpio_match); - -static struct platform_driver axp20x_gpio_driver = { - .probe = axp20x_gpio_probe, - .driver = { - .name = "axp20x-gpio", - .of_match_table = axp20x_gpio_match, - }, -}; - -module_platform_driver(axp20x_gpio_driver); - -MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); -MODULE_DESCRIPTION("AXP20x PMIC GPIO driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 4571cc098b76..ce126955212c 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -63,6 +63,16 @@ config PINCTRL_AS3722 open drain configuration for the GPIO pins of AS3722 devices. It also supports the GPIO functionality through gpiolib. +config PINCTRL_AXP209 + tristate "X-Powers AXP209 PMIC pinctrl and GPIO Support" + depends on MFD_AXP20X + help + AXP PMICs provides multiple GPIOs that can be muxed for different + functions. This driver bundles a pinctrl driver to select the function + muxing and a GPIO driver to handle the GPIO when the GPIO function is + selected. + Say yes to enable pinctrl and GPIO support for the AXP209 PMIC + config PINCTRL_BF54x def_bool y if BF54x select PINCTRL_ADI2 diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index d0d4844f8022..4777f1595ce2 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_GENERIC_PINCONF) += pinconf-generic.o obj-$(CONFIG_PINCTRL_ADI2) += pinctrl-adi2.o obj-$(CONFIG_PINCTRL_ARTPEC6) += pinctrl-artpec6.o obj-$(CONFIG_PINCTRL_AS3722) += pinctrl-as3722.o +obj-$(CONFIG_PINCTRL_AXP209) += pinctrl-axp209.o obj-$(CONFIG_PINCTRL_BF54x) += pinctrl-adi2-bf54x.o obj-$(CONFIG_PINCTRL_BF60x) += pinctrl-adi2-bf60x.o obj-$(CONFIG_PINCTRL_AT91) += pinctrl-at91.o diff --git a/drivers/pinctrl/pinctrl-axp209.c b/drivers/pinctrl/pinctrl-axp209.c new file mode 100644 index 000000000000..22d3bb0bf927 --- /dev/null +++ b/drivers/pinctrl/pinctrl-axp209.c @@ -0,0 +1,476 @@ +/* + * AXP20x pinctrl and GPIO driver + * + * Copyright (C) 2016 Maxime Ripard <maxime.ripard@free-electrons.com> + * Copyright (C) 2017 Quentin Schulz <quentin.schulz@free-electrons.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/bitops.h> +#include <linux/device.h> +#include <linux/gpio/driver.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mfd/axp20x.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/pinctrl/pinconf-generic.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#define AXP20X_GPIO_FUNCTIONS 0x7 +#define AXP20X_GPIO_FUNCTION_OUT_LOW 0 +#define AXP20X_GPIO_FUNCTION_OUT_HIGH 1 +#define AXP20X_GPIO_FUNCTION_INPUT 2 + +#define AXP20X_FUNC_GPIO_OUT 0 +#define AXP20X_FUNC_GPIO_IN 1 +#define AXP20X_FUNC_LDO 2 +#define AXP20X_FUNC_ADC 3 +#define AXP20X_FUNCS_NB 4 + +#define AXP20X_MUX_GPIO_OUT 0 +#define AXP20X_MUX_GPIO_IN BIT(1) +#define AXP20X_MUX_ADC BIT(2) + +#define AXP813_MUX_ADC (BIT(2) | BIT(0)) + +struct axp20x_pctrl_desc { + const struct pinctrl_pin_desc *pins; + unsigned int npins; + /* Stores the pins supporting LDO function. Bit offset is pin number. */ + u8 ldo_mask; + /* Stores the pins supporting ADC function. Bit offset is pin number. */ + u8 adc_mask; + u8 gpio_status_offset; + u8 adc_mux; +}; + +struct axp20x_pinctrl_function { + const char *name; + unsigned int muxval; + const char **groups; + unsigned int ngroups; +}; + +struct axp20x_pctl { + struct gpio_chip chip; + struct regmap *regmap; + struct pinctrl_dev *pctl_dev; + struct device *dev; + const struct axp20x_pctrl_desc *desc; + struct axp20x_pinctrl_function funcs[AXP20X_FUNCS_NB]; +}; + +static const struct pinctrl_pin_desc axp209_pins[] = { + PINCTRL_PIN(0, "GPIO0"), + PINCTRL_PIN(1, "GPIO1"), + PINCTRL_PIN(2, "GPIO2"), +}; + +static const struct pinctrl_pin_desc axp813_pins[] = { + PINCTRL_PIN(0, "GPIO0"), + PINCTRL_PIN(1, "GPIO1"), +}; + +static const struct axp20x_pctrl_desc axp20x_data = { + .pins = axp209_pins, + .npins = ARRAY_SIZE(axp209_pins), + .ldo_mask = BIT(0) | BIT(1), + .adc_mask = BIT(0) | BIT(1), + .gpio_status_offset = 4, + .adc_mux = AXP20X_MUX_ADC, +}; + +static const struct axp20x_pctrl_desc axp813_data = { + .pins = axp813_pins, + .npins = ARRAY_SIZE(axp813_pins), + .ldo_mask = BIT(0) | BIT(1), + .adc_mask = BIT(0), + .gpio_status_offset = 0, + .adc_mux = AXP813_MUX_ADC, +}; + +static int axp20x_gpio_get_reg(unsigned int offset) +{ + switch (offset) { + case 0: + return AXP20X_GPIO0_CTRL; + case 1: + return AXP20X_GPIO1_CTRL; + case 2: + return AXP20X_GPIO2_CTRL; + } + + return -EINVAL; +} + +static int axp20x_gpio_input(struct gpio_chip *chip, unsigned int offset) +{ + return pinctrl_gpio_direction_input(chip->base + offset); +} + +static int axp20x_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + struct axp20x_pctl *pctl = gpiochip_get_data(chip); + unsigned int val; + int ret; + + ret = regmap_read(pctl->regmap, AXP20X_GPIO20_SS, &val); + if (ret) + return ret; + + return !!(val & BIT(offset + pctl->desc->gpio_status_offset)); +} + +static int axp20x_gpio_get_direction(struct gpio_chip *chip, + unsigned int offset) +{ + struct axp20x_pctl *pctl = gpiochip_get_data(chip); + unsigned int val; + int reg, ret; + + reg = axp20x_gpio_get_reg(offset); + if (reg < 0) + return reg; + + ret = regmap_read(pctl->regmap, reg, &val); + if (ret) + return ret; + + /* + * This shouldn't really happen if the pin is in use already, + * or if it's not in use yet, it doesn't matter since we're + * going to change the value soon anyway. Default to output. + */ + if ((val & AXP20X_GPIO_FUNCTIONS) > 2) + return 0; + + /* + * The GPIO directions are the three lowest values. + * 2 is input, 0 and 1 are output + */ + return val & 2; +} + +static int axp20x_gpio_output(struct gpio_chip *chip, unsigned int offset, + int value) +{ + chip->set(chip, offset, value); + + return 0; +} + +static void axp20x_gpio_set(struct gpio_chip *chip, unsigned int offset, + int value) +{ + struct axp20x_pctl *pctl = gpiochip_get_data(chip); + int reg; + + reg = axp20x_gpio_get_reg(offset); + if (reg < 0) + return; + + regmap_update_bits(pctl->regmap, reg, + AXP20X_GPIO_FUNCTIONS, + value ? AXP20X_GPIO_FUNCTION_OUT_HIGH : + AXP20X_GPIO_FUNCTION_OUT_LOW); +} + +static int axp20x_pmx_set(struct pinctrl_dev *pctldev, unsigned int offset, + u8 config) +{ + struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev); + int reg; + + reg = axp20x_gpio_get_reg(offset); + if (reg < 0) + return reg; + + return regmap_update_bits(pctl->regmap, reg, AXP20X_GPIO_FUNCTIONS, + config); +} + +static int axp20x_pmx_func_cnt(struct pinctrl_dev *pctldev) +{ + struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev); + + return ARRAY_SIZE(pctl->funcs); +} + +static const char *axp20x_pmx_func_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev); + + return pctl->funcs[selector].name; +} + +static int axp20x_pmx_func_groups(struct pinctrl_dev *pctldev, + unsigned int selector, + const char * const **groups, + unsigned int *num_groups) +{ + struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev); + + *groups = pctl->funcs[selector].groups; + *num_groups = pctl->funcs[selector].ngroups; + + return 0; +} + +static int axp20x_pmx_set_mux(struct pinctrl_dev *pctldev, + unsigned int function, unsigned int group) +{ + struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev); + unsigned int mask; + + /* Every pin supports GPIO_OUT and GPIO_IN functions */ + if (function <= AXP20X_FUNC_GPIO_IN) + return axp20x_pmx_set(pctldev, group, + pctl->funcs[function].muxval); + + if (function == AXP20X_FUNC_LDO) + mask = pctl->desc->ldo_mask; + else + mask = pctl->desc->adc_mask; + + if (!(BIT(group) & mask)) + return -EINVAL; + + /* + * We let the regulator framework handle the LDO muxing as muxing bits + * are basically also regulators on/off bits. It's better not to enforce + * any state of the regulator when selecting LDO mux so that we don't + * interfere with the regulator driver. + */ + if (function == AXP20X_FUNC_LDO) + return 0; + + return axp20x_pmx_set(pctldev, group, pctl->funcs[function].muxval); +} + +static int axp20x_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset, bool input) +{ + struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev); + + if (input) + return axp20x_pmx_set(pctldev, offset, + pctl->funcs[AXP20X_FUNC_GPIO_IN].muxval); + + return axp20x_pmx_set(pctldev, offset, + pctl->funcs[AXP20X_FUNC_GPIO_OUT].muxval); +} + +static const struct pinmux_ops axp20x_pmx_ops = { + .get_functions_count = axp20x_pmx_func_cnt, + .get_function_name = axp20x_pmx_func_name, + .get_function_groups = axp20x_pmx_func_groups, + .set_mux = axp20x_pmx_set_mux, + .gpio_set_direction = axp20x_pmx_gpio_set_direction, + .strict = true, +}; + +static int axp20x_groups_cnt(struct pinctrl_dev *pctldev) +{ + struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev); + + return pctl->desc->npins; +} + +static int axp20x_group_pins(struct pinctrl_dev *pctldev, unsigned int selector, + const unsigned int **pins, unsigned int *num_pins) +{ + struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev); + + *pins = (unsigned int *)&pctl->desc->pins[selector]; + *num_pins = 1; + + return 0; +} + +static const char *axp20x_group_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev); + + return pctl->desc->pins[selector].name; +} + +static const struct pinctrl_ops axp20x_pctrl_ops = { + .dt_node_to_map = pinconf_generic_dt_node_to_map_group, + .dt_free_map = pinconf_generic_dt_free_map, + .get_groups_count = axp20x_groups_cnt, + .get_group_name = axp20x_group_name, + .get_group_pins = axp20x_group_pins, +}; + +static void axp20x_funcs_groups_from_mask(struct device *dev, unsigned int mask, + unsigned int mask_len, + struct axp20x_pinctrl_function *func, + const struct pinctrl_pin_desc *pins) +{ + unsigned long int mask_cpy = mask; + const char **group; + unsigned int ngroups = hweight8(mask); + int bit; + + func->ngroups = ngroups; + if (func->ngroups > 0) { + func->groups = devm_kzalloc(dev, ngroups * sizeof(const char *), + GFP_KERNEL); + group = func->groups; + for_each_set_bit(bit, &mask_cpy, mask_len) { + *group = pins[bit].name; + group++; + } + } +} + +static void axp20x_build_funcs_groups(struct platform_device *pdev) +{ + struct axp20x_pctl *pctl = platform_get_drvdata(pdev); + int i, pin, npins = pctl->desc->npins; + + pctl->funcs[AXP20X_FUNC_GPIO_OUT].name = "gpio_out"; + pctl->funcs[AXP20X_FUNC_GPIO_OUT].muxval = AXP20X_MUX_GPIO_OUT; + pctl->funcs[AXP20X_FUNC_GPIO_IN].name = "gpio_in"; + pctl->funcs[AXP20X_FUNC_GPIO_IN].muxval = AXP20X_MUX_GPIO_IN; + pctl->funcs[AXP20X_FUNC_LDO].name = "ldo"; + /* + * Muxval for LDO is useless as we won't use it. + * See comment in axp20x_pmx_set_mux. + */ + pctl->funcs[AXP20X_FUNC_ADC].name = "adc"; + pctl->funcs[AXP20X_FUNC_ADC].muxval = pctl->desc->adc_mux; + + /* Every pin supports GPIO_OUT and GPIO_IN functions */ + for (i = 0; i <= AXP20X_FUNC_GPIO_IN; i++) { + pctl->funcs[i].ngroups = npins; + pctl->funcs[i].groups = devm_kzalloc(&pdev->dev, + npins * sizeof(char *), + GFP_KERNEL); + for (pin = 0; pin < npins; pin++) + pctl->funcs[i].groups[pin] = pctl->desc->pins[pin].name; + } + + axp20x_funcs_groups_from_mask(&pdev->dev, pctl->desc->ldo_mask, + npins, &pctl->funcs[AXP20X_FUNC_LDO], + pctl->desc->pins); + + axp20x_funcs_groups_from_mask(&pdev->dev, pctl->desc->adc_mask, + npins, &pctl->funcs[AXP20X_FUNC_ADC], + pctl->desc->pins); +} + +static const struct of_device_id axp20x_pctl_match[] = { + { .compatible = "x-powers,axp209-gpio", .data = &axp20x_data, }, + { .compatible = "x-powers,axp813-gpio", .data = &axp813_data, }, + { } +}; +MODULE_DEVICE_TABLE(of, axp20x_pctl_match); + +static int axp20x_pctl_probe(struct platform_device *pdev) +{ + struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); + struct axp20x_pctl *pctl; + struct device *dev = &pdev->dev; + struct pinctrl_desc *pctrl_desc; + int ret; + + if (!of_device_is_available(pdev->dev.of_node)) + return -ENODEV; + + if (!axp20x) { + dev_err(&pdev->dev, "Parent drvdata not set\n"); + return -EINVAL; + } + + pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL); + if (!pctl) + return -ENOMEM; + + pctl->chip.base = -1; + pctl->chip.can_sleep = true; + pctl->chip.request = gpiochip_generic_request; + pctl->chip.free = gpiochip_generic_free; + pctl->chip.parent = &pdev->dev; + pctl->chip.label = dev_name(&pdev->dev); + pctl->chip.owner = THIS_MODULE; + pctl->chip.get = axp20x_gpio_get; + pctl->chip.get_direction = axp20x_gpio_get_direction; + pctl->chip.set = axp20x_gpio_set; + pctl->chip.direction_input = axp20x_gpio_input; + pctl->chip.direction_output = axp20x_gpio_output; + pctl->chip.ngpio = pctl->desc->npins; + + pctl->desc = (struct axp20x_pctrl_desc *)of_device_get_match_data(dev); + pctl->regmap = axp20x->regmap; + pctl->dev = &pdev->dev; + + platform_set_drvdata(pdev, pctl); + + axp20x_build_funcs_groups(pdev); + + pctrl_desc = devm_kzalloc(&pdev->dev, sizeof(*pctrl_desc), GFP_KERNEL); + if (!pctrl_desc) + return -ENOMEM; + + pctrl_desc->name = dev_name(&pdev->dev); + pctrl_desc->owner = THIS_MODULE; + pctrl_desc->pins = pctl->desc->pins; + pctrl_desc->npins = pctl->desc->npins; + pctrl_desc->pctlops = &axp20x_pctrl_ops; + pctrl_desc->pmxops = &axp20x_pmx_ops; + + pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, pctrl_desc, pctl); + if (IS_ERR(pctl->pctl_dev)) { + dev_err(&pdev->dev, "couldn't register pinctrl driver\n"); + return PTR_ERR(pctl->pctl_dev); + } + + ret = devm_gpiochip_add_data(&pdev->dev, &pctl->chip, pctl); + if (ret) { + dev_err(&pdev->dev, "Failed to register GPIO chip\n"); + return ret; + } + + ret = gpiochip_add_pin_range(&pctl->chip, dev_name(&pdev->dev), + pctl->desc->pins->number, + pctl->desc->pins->number, + pctl->desc->npins); + if (ret) { + dev_err(&pdev->dev, "failed to add pin range\n"); + return ret; + } + + dev_info(&pdev->dev, "AXP209 pinctrl and GPIO driver loaded\n"); + + return 0; +} + +static struct platform_driver axp20x_pctl_driver = { + .probe = axp20x_pctl_probe, + .driver = { + .name = "axp20x-gpio", + .of_match_table = axp20x_pctl_match, + }, +}; + +module_platform_driver(axp20x_pctl_driver); + +MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); +MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>"); +MODULE_DESCRIPTION("AXP20x PMIC pinctrl and GPIO driver"); +MODULE_LICENSE("GPL"); |