diff options
author | Grant Likely <grant.likely@secretlab.ca> | 2011-06-04 18:38:28 -0600 |
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committer | Grant Likely <grant.likely@secretlab.ca> | 2011-06-06 10:10:11 -0600 |
commit | c103de240439dfee24ac50eb99c8be3a30d13323 (patch) | |
tree | 014eeda779510d7d3dfabd1183ce7f1a288d367b /drivers/gpio/wm8994-gpio.c | |
parent | 8c31b1635b91e48f867e010cd7bcd06393e5858a (diff) |
gpio: reorganize drivers
Sort the gpio makefile and enforce the naming convention gpio-*.c for
gpio drivers.
v2: cleaned up filenames in Kconfig and comment blocks
v3: fixup use of BASIC_MMIO to GENERIC_GPIO for mxc
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/gpio/wm8994-gpio.c')
-rw-r--r-- | drivers/gpio/wm8994-gpio.c | 242 |
1 files changed, 0 insertions, 242 deletions
diff --git a/drivers/gpio/wm8994-gpio.c b/drivers/gpio/wm8994-gpio.c deleted file mode 100644 index c822baacd8fc..000000000000 --- a/drivers/gpio/wm8994-gpio.c +++ /dev/null @@ -1,242 +0,0 @@ -/* - * wm8994-gpio.c -- gpiolib support for Wolfson WM8994 - * - * Copyright 2009 Wolfson Microelectronics PLC. - * - * Author: Mark Brown <broonie@opensource.wolfsonmicro.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/kernel.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/gpio.h> -#include <linux/mfd/core.h> -#include <linux/platform_device.h> -#include <linux/seq_file.h> - -#include <linux/mfd/wm8994/core.h> -#include <linux/mfd/wm8994/pdata.h> -#include <linux/mfd/wm8994/gpio.h> -#include <linux/mfd/wm8994/registers.h> - -struct wm8994_gpio { - struct wm8994 *wm8994; - struct gpio_chip gpio_chip; -}; - -static inline struct wm8994_gpio *to_wm8994_gpio(struct gpio_chip *chip) -{ - return container_of(chip, struct wm8994_gpio, gpio_chip); -} - -static int wm8994_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip); - struct wm8994 *wm8994 = wm8994_gpio->wm8994; - - switch (wm8994->type) { - case WM8958: - switch (offset) { - case 1: - case 2: - case 3: - case 4: - case 6: - return -EINVAL; - } - break; - default: - break; - } - - return 0; -} - -static int wm8994_gpio_direction_in(struct gpio_chip *chip, unsigned offset) -{ - struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip); - struct wm8994 *wm8994 = wm8994_gpio->wm8994; - - return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset, - WM8994_GPN_DIR, WM8994_GPN_DIR); -} - -static int wm8994_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip); - struct wm8994 *wm8994 = wm8994_gpio->wm8994; - int ret; - - ret = wm8994_reg_read(wm8994, WM8994_GPIO_1 + offset); - if (ret < 0) - return ret; - - if (ret & WM8994_GPN_LVL) - return 1; - else - return 0; -} - -static int wm8994_gpio_direction_out(struct gpio_chip *chip, - unsigned offset, int value) -{ - struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip); - struct wm8994 *wm8994 = wm8994_gpio->wm8994; - - return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset, - WM8994_GPN_DIR, 0); -} - -static void wm8994_gpio_set(struct gpio_chip *chip, unsigned offset, int value) -{ - struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip); - struct wm8994 *wm8994 = wm8994_gpio->wm8994; - - if (value) - value = WM8994_GPN_LVL; - - wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset, WM8994_GPN_LVL, value); -} - -static int wm8994_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -{ - struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip); - struct wm8994 *wm8994 = wm8994_gpio->wm8994; - - if (!wm8994->irq_base) - return -EINVAL; - - return wm8994->irq_base + offset; -} - - -#ifdef CONFIG_DEBUG_FS -static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) -{ - struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip); - struct wm8994 *wm8994 = wm8994_gpio->wm8994; - int i; - - for (i = 0; i < chip->ngpio; i++) { - int gpio = i + chip->base; - int reg; - const char *label; - - /* We report the GPIO even if it's not requested since - * we're also reporting things like alternate - * functions which apply even when the GPIO is not in - * use as a GPIO. - */ - label = gpiochip_is_requested(chip, i); - if (!label) - label = "Unrequested"; - - seq_printf(s, " gpio-%-3d (%-20.20s) ", gpio, label); - - reg = wm8994_reg_read(wm8994, WM8994_GPIO_1 + i); - if (reg < 0) { - dev_err(wm8994->dev, - "GPIO control %d read failed: %d\n", - gpio, reg); - seq_printf(s, "\n"); - continue; - } - - /* No decode yet; note that GPIO2 is special */ - seq_printf(s, "(%x)\n", reg); - } -} -#else -#define wm8994_gpio_dbg_show NULL -#endif - -static struct gpio_chip template_chip = { - .label = "wm8994", - .owner = THIS_MODULE, - .request = wm8994_gpio_request, - .direction_input = wm8994_gpio_direction_in, - .get = wm8994_gpio_get, - .direction_output = wm8994_gpio_direction_out, - .set = wm8994_gpio_set, - .to_irq = wm8994_gpio_to_irq, - .dbg_show = wm8994_gpio_dbg_show, - .can_sleep = 1, -}; - -static int __devinit wm8994_gpio_probe(struct platform_device *pdev) -{ - struct wm8994 *wm8994 = dev_get_drvdata(pdev->dev.parent); - struct wm8994_pdata *pdata = wm8994->dev->platform_data; - struct wm8994_gpio *wm8994_gpio; - int ret; - - wm8994_gpio = kzalloc(sizeof(*wm8994_gpio), GFP_KERNEL); - if (wm8994_gpio == NULL) - return -ENOMEM; - - wm8994_gpio->wm8994 = wm8994; - wm8994_gpio->gpio_chip = template_chip; - wm8994_gpio->gpio_chip.ngpio = WM8994_GPIO_MAX; - wm8994_gpio->gpio_chip.dev = &pdev->dev; - if (pdata && pdata->gpio_base) - wm8994_gpio->gpio_chip.base = pdata->gpio_base; - else - wm8994_gpio->gpio_chip.base = -1; - - ret = gpiochip_add(&wm8994_gpio->gpio_chip); - if (ret < 0) { - dev_err(&pdev->dev, "Could not register gpiochip, %d\n", - ret); - goto err; - } - - platform_set_drvdata(pdev, wm8994_gpio); - - return ret; - -err: - kfree(wm8994_gpio); - return ret; -} - -static int __devexit wm8994_gpio_remove(struct platform_device *pdev) -{ - struct wm8994_gpio *wm8994_gpio = platform_get_drvdata(pdev); - int ret; - - ret = gpiochip_remove(&wm8994_gpio->gpio_chip); - if (ret == 0) - kfree(wm8994_gpio); - - return ret; -} - -static struct platform_driver wm8994_gpio_driver = { - .driver.name = "wm8994-gpio", - .driver.owner = THIS_MODULE, - .probe = wm8994_gpio_probe, - .remove = __devexit_p(wm8994_gpio_remove), -}; - -static int __init wm8994_gpio_init(void) -{ - return platform_driver_register(&wm8994_gpio_driver); -} -subsys_initcall(wm8994_gpio_init); - -static void __exit wm8994_gpio_exit(void) -{ - platform_driver_unregister(&wm8994_gpio_driver); -} -module_exit(wm8994_gpio_exit); - -MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); -MODULE_DESCRIPTION("GPIO interface for WM8994"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:wm8994-gpio"); |