diff options
Diffstat (limited to 'drivers/gpio/gpio-palmas.c')
| -rw-r--r-- | drivers/gpio/gpio-palmas.c | 161 |
1 files changed, 93 insertions, 68 deletions
diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c index e3a4e56f5a42..e377f6dd4ccf 100644 --- a/drivers/gpio/gpio-palmas.c +++ b/drivers/gpio/gpio-palmas.c @@ -1,29 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * TI Palma series PMIC's GPIO driver. * * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. * * Author: Laxman Dewangan <ldewangan@nvidia.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. */ -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/kernel.h> -#include <linux/module.h> +#include <linux/init.h> #include <linux/mfd/palmas.h> #include <linux/of.h> -#include <linux/of_device.h> #include <linux/platform_device.h> struct palmas_gpio { @@ -31,139 +19,177 @@ struct palmas_gpio { struct palmas *palmas; }; -static inline struct palmas_gpio *to_palmas_gpio(struct gpio_chip *chip) -{ - return container_of(chip, struct palmas_gpio, gpio_chip); -} +struct palmas_device_data { + int ngpio; +}; static int palmas_gpio_get(struct gpio_chip *gc, unsigned offset) { - struct palmas_gpio *pg = to_palmas_gpio(gc); + struct palmas_gpio *pg = gpiochip_get_data(gc); struct palmas *palmas = pg->palmas; unsigned int val; int ret; + unsigned int reg; + int gpio16 = (offset/8); + + offset %= 8; + reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR; + + ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val); + if (ret < 0) { + dev_err(gc->parent, "Reg 0x%02x read failed, %d\n", reg, ret); + return ret; + } - ret = palmas_read(palmas, PALMAS_GPIO_BASE, PALMAS_GPIO_DATA_IN, &val); + if (val & BIT(offset)) + reg = (gpio16) ? PALMAS_GPIO_DATA_OUT2 : PALMAS_GPIO_DATA_OUT; + else + reg = (gpio16) ? PALMAS_GPIO_DATA_IN2 : PALMAS_GPIO_DATA_IN; + + ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val); if (ret < 0) { - dev_err(gc->dev, "GPIO_DATA_IN read failed, err = %d\n", ret); + dev_err(gc->parent, "Reg 0x%02x read failed, %d\n", reg, ret); return ret; } return !!(val & BIT(offset)); } -static void palmas_gpio_set(struct gpio_chip *gc, unsigned offset, - int value) +static int palmas_gpio_set(struct gpio_chip *gc, unsigned int offset, + int value) { - struct palmas_gpio *pg = to_palmas_gpio(gc); + struct palmas_gpio *pg = gpiochip_get_data(gc); struct palmas *palmas = pg->palmas; - int ret; + unsigned int reg; + int gpio16 = (offset/8); - if (value) - ret = palmas_write(palmas, PALMAS_GPIO_BASE, - PALMAS_GPIO_SET_DATA_OUT, BIT(offset)); + offset %= 8; + if (gpio16) + reg = (value) ? + PALMAS_GPIO_SET_DATA_OUT2 : PALMAS_GPIO_CLEAR_DATA_OUT2; else - ret = palmas_write(palmas, PALMAS_GPIO_BASE, - PALMAS_GPIO_CLEAR_DATA_OUT, BIT(offset)); - if (ret < 0) - dev_err(gc->dev, "%s write failed, err = %d\n", - (value) ? "GPIO_SET_DATA_OUT" : "GPIO_CLEAR_DATA_OUT", - ret); + reg = (value) ? + PALMAS_GPIO_SET_DATA_OUT : PALMAS_GPIO_CLEAR_DATA_OUT; + + return palmas_write(palmas, PALMAS_GPIO_BASE, reg, BIT(offset)); } static int palmas_gpio_output(struct gpio_chip *gc, unsigned offset, int value) { - struct palmas_gpio *pg = to_palmas_gpio(gc); + struct palmas_gpio *pg = gpiochip_get_data(gc); struct palmas *palmas = pg->palmas; int ret; + unsigned int reg; + int gpio16 = (offset/8); + + offset %= 8; + reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR; /* Set the initial value */ - palmas_gpio_set(gc, offset, value); + ret = palmas_gpio_set(gc, offset, value); + if (ret) + return ret; - ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, - PALMAS_GPIO_DATA_DIR, BIT(offset), BIT(offset)); + ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg, + BIT(offset), BIT(offset)); if (ret < 0) - dev_err(gc->dev, "GPIO_DATA_DIR write failed, err = %d\n", ret); + dev_err(gc->parent, "Reg 0x%02x update failed, %d\n", reg, + ret); return ret; } static int palmas_gpio_input(struct gpio_chip *gc, unsigned offset) { - struct palmas_gpio *pg = to_palmas_gpio(gc); + struct palmas_gpio *pg = gpiochip_get_data(gc); struct palmas *palmas = pg->palmas; int ret; + unsigned int reg; + int gpio16 = (offset/8); + + offset %= 8; + reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR; - ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, - PALMAS_GPIO_DATA_DIR, BIT(offset), 0); + ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg, BIT(offset), 0); if (ret < 0) - dev_err(gc->dev, "GPIO_DATA_DIR write failed, err = %d\n", ret); + dev_err(gc->parent, "Reg 0x%02x update failed, %d\n", reg, + ret); return ret; } static int palmas_gpio_to_irq(struct gpio_chip *gc, unsigned offset) { - struct palmas_gpio *pg = to_palmas_gpio(gc); + struct palmas_gpio *pg = gpiochip_get_data(gc); struct palmas *palmas = pg->palmas; return palmas_irq_get_virq(palmas, PALMAS_GPIO_0_IRQ + offset); } +static const struct palmas_device_data palmas_dev_data = { + .ngpio = 8, +}; + +static const struct palmas_device_data tps80036_dev_data = { + .ngpio = 16, +}; + +static const struct of_device_id of_palmas_gpio_match[] = { + { .compatible = "ti,palmas-gpio", .data = &palmas_dev_data,}, + { .compatible = "ti,tps65913-gpio", .data = &palmas_dev_data,}, + { .compatible = "ti,tps65914-gpio", .data = &palmas_dev_data,}, + { .compatible = "ti,tps80036-gpio", .data = &tps80036_dev_data,}, + { }, +}; +MODULE_DEVICE_TABLE(of, of_palmas_gpio_match); + static int palmas_gpio_probe(struct platform_device *pdev) { struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); struct palmas_platform_data *palmas_pdata; struct palmas_gpio *palmas_gpio; int ret; + const struct palmas_device_data *dev_data; + + dev_data = of_device_get_match_data(&pdev->dev); + if (!dev_data) + dev_data = &palmas_dev_data; palmas_gpio = devm_kzalloc(&pdev->dev, sizeof(*palmas_gpio), GFP_KERNEL); - if (!palmas_gpio) { - dev_err(&pdev->dev, "Could not allocate palmas_gpio\n"); + if (!palmas_gpio) return -ENOMEM; - } palmas_gpio->palmas = palmas; palmas_gpio->gpio_chip.owner = THIS_MODULE; palmas_gpio->gpio_chip.label = dev_name(&pdev->dev); - palmas_gpio->gpio_chip.ngpio = 8; - palmas_gpio->gpio_chip.can_sleep = 1; + palmas_gpio->gpio_chip.ngpio = dev_data->ngpio; + palmas_gpio->gpio_chip.can_sleep = true; palmas_gpio->gpio_chip.direction_input = palmas_gpio_input; palmas_gpio->gpio_chip.direction_output = palmas_gpio_output; palmas_gpio->gpio_chip.to_irq = palmas_gpio_to_irq; palmas_gpio->gpio_chip.set = palmas_gpio_set; palmas_gpio->gpio_chip.get = palmas_gpio_get; - palmas_gpio->gpio_chip.dev = &pdev->dev; -#ifdef CONFIG_OF_GPIO - palmas_gpio->gpio_chip.of_node = palmas->dev->of_node; -#endif + palmas_gpio->gpio_chip.parent = &pdev->dev; + palmas_pdata = dev_get_platdata(palmas->dev); if (palmas_pdata && palmas_pdata->gpio_base) palmas_gpio->gpio_chip.base = palmas_pdata->gpio_base; else palmas_gpio->gpio_chip.base = -1; - ret = gpiochip_add(&palmas_gpio->gpio_chip); + ret = devm_gpiochip_add_data(&pdev->dev, &palmas_gpio->gpio_chip, + palmas_gpio); if (ret < 0) { dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); return ret; } - platform_set_drvdata(pdev, palmas_gpio); return ret; } -static int palmas_gpio_remove(struct platform_device *pdev) -{ - struct palmas_gpio *palmas_gpio = platform_get_drvdata(pdev); - - return gpiochip_remove(&palmas_gpio->gpio_chip); -} - static struct platform_driver palmas_gpio_driver = { .driver.name = "palmas-gpio", - .driver.owner = THIS_MODULE, + .driver.of_match_table = of_palmas_gpio_match, .probe = palmas_gpio_probe, - .remove = palmas_gpio_remove, }; static int __init palmas_gpio_init(void) @@ -178,7 +204,6 @@ static void __exit palmas_gpio_exit(void) } module_exit(palmas_gpio_exit); -MODULE_ALIAS("platform:palmas-gpio"); +MODULE_DESCRIPTION("TI PALMAS series GPIO driver"); MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); -MODULE_DESCRIPTION("GPIO driver for TI Palmas series PMICs"); -MODULE_LICENSE("GPL v2"); +MODULE_LICENSE("GPL"); |