mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 12:26:41 +07:00
6679185909
Move custom shmobile gpio code to a sh-gpio.h to remove the dependency on mach/gpio.h. shmobile always uses gpiolib, so we can remove __GPIOLIB_COMPLEX define from mach/gpio.h. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Magnus Damm <magnus.damm@gmail.com>
241 lines
5.3 KiB
C
241 lines
5.3 KiB
C
/*
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* SuperH Pin Function Controller GPIO driver.
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*
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* Copyright (C) 2008 Magnus Damm
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* Copyright (C) 2009 - 2012 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#define pr_fmt(fmt) "sh_pfc " KBUILD_MODNAME ": " fmt
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#include <linux/init.h>
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#include <linux/gpio.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/sh_pfc.h>
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struct sh_pfc_chip {
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struct sh_pfc *pfc;
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struct gpio_chip gpio_chip;
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};
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static struct sh_pfc_chip *gpio_to_pfc_chip(struct gpio_chip *gc)
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{
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return container_of(gc, struct sh_pfc_chip, gpio_chip);
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}
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static struct sh_pfc *gpio_to_pfc(struct gpio_chip *gc)
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{
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return gpio_to_pfc_chip(gc)->pfc;
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}
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static int sh_gpio_request(struct gpio_chip *gc, unsigned offset)
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{
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return pinctrl_request_gpio(offset);
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}
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static void sh_gpio_free(struct gpio_chip *gc, unsigned offset)
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{
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pinctrl_free_gpio(offset);
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}
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static void sh_gpio_set_value(struct sh_pfc *pfc, unsigned gpio, int value)
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{
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struct pinmux_data_reg *dr = NULL;
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int bit = 0;
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if (!pfc || sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0)
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BUG();
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else
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sh_pfc_write_bit(dr, bit, value);
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}
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static int sh_gpio_get_value(struct sh_pfc *pfc, unsigned gpio)
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{
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struct pinmux_data_reg *dr = NULL;
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int bit = 0;
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if (!pfc || sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0)
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return -EINVAL;
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return sh_pfc_read_bit(dr, bit);
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}
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static int sh_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
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{
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return pinctrl_gpio_direction_input(offset);
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}
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static int sh_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
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int value)
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{
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sh_gpio_set_value(gpio_to_pfc(gc), offset, value);
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return pinctrl_gpio_direction_output(offset);
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}
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static int sh_gpio_get(struct gpio_chip *gc, unsigned offset)
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{
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return sh_gpio_get_value(gpio_to_pfc(gc), offset);
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}
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static void sh_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
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{
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sh_gpio_set_value(gpio_to_pfc(gc), offset, value);
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}
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static int sh_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
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{
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struct sh_pfc *pfc = gpio_to_pfc(gc);
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pinmux_enum_t enum_id;
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pinmux_enum_t *enum_ids;
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int i, k, pos;
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pos = 0;
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enum_id = 0;
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while (1) {
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pos = sh_pfc_gpio_to_enum(pfc, offset, pos, &enum_id);
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if (pos <= 0 || !enum_id)
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break;
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for (i = 0; i < pfc->gpio_irq_size; i++) {
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enum_ids = pfc->gpio_irq[i].enum_ids;
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for (k = 0; enum_ids[k]; k++) {
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if (enum_ids[k] == enum_id)
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return pfc->gpio_irq[i].irq;
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}
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}
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}
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return -ENOSYS;
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}
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static void sh_pfc_gpio_setup(struct sh_pfc_chip *chip)
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{
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struct sh_pfc *pfc = chip->pfc;
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struct gpio_chip *gc = &chip->gpio_chip;
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gc->request = sh_gpio_request;
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gc->free = sh_gpio_free;
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gc->direction_input = sh_gpio_direction_input;
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gc->get = sh_gpio_get;
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gc->direction_output = sh_gpio_direction_output;
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gc->set = sh_gpio_set;
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gc->to_irq = sh_gpio_to_irq;
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WARN_ON(pfc->first_gpio != 0); /* needs testing */
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gc->label = pfc->name;
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gc->owner = THIS_MODULE;
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gc->base = pfc->first_gpio;
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gc->ngpio = (pfc->last_gpio - pfc->first_gpio) + 1;
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}
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int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
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{
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struct sh_pfc_chip *chip;
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int ret;
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chip = kzalloc(sizeof(struct sh_pfc_chip), GFP_KERNEL);
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if (unlikely(!chip))
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return -ENOMEM;
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chip->pfc = pfc;
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sh_pfc_gpio_setup(chip);
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ret = gpiochip_add(&chip->gpio_chip);
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if (unlikely(ret < 0))
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kfree(chip);
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pr_info("%s handling gpio %d -> %d\n",
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pfc->name, pfc->first_gpio, pfc->last_gpio);
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return ret;
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}
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EXPORT_SYMBOL_GPL(sh_pfc_register_gpiochip);
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static int sh_pfc_gpio_match(struct gpio_chip *gc, void *data)
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{
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return !!strstr(gc->label, data);
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}
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static int __devinit sh_pfc_gpio_probe(struct platform_device *pdev)
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{
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struct sh_pfc_chip *chip;
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struct gpio_chip *gc;
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gc = gpiochip_find("_pfc", sh_pfc_gpio_match);
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if (unlikely(!gc)) {
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pr_err("Cant find gpio chip\n");
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return -ENODEV;
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}
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chip = gpio_to_pfc_chip(gc);
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platform_set_drvdata(pdev, chip);
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pr_info("attaching to GPIO chip %s\n", chip->pfc->name);
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return 0;
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}
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static int __devexit sh_pfc_gpio_remove(struct platform_device *pdev)
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{
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struct sh_pfc_chip *chip = platform_get_drvdata(pdev);
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int ret;
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ret = gpiochip_remove(&chip->gpio_chip);
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if (unlikely(ret < 0))
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return ret;
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kfree(chip);
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return 0;
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}
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static struct platform_driver sh_pfc_gpio_driver = {
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.probe = sh_pfc_gpio_probe,
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.remove = __devexit_p(sh_pfc_gpio_remove),
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.driver = {
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.name = KBUILD_MODNAME,
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.owner = THIS_MODULE,
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},
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};
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static struct platform_device sh_pfc_gpio_device = {
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.name = KBUILD_MODNAME,
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.id = -1,
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};
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static int __init sh_pfc_gpio_init(void)
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{
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int rc;
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rc = platform_driver_register(&sh_pfc_gpio_driver);
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if (likely(!rc)) {
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rc = platform_device_register(&sh_pfc_gpio_device);
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if (unlikely(rc))
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platform_driver_unregister(&sh_pfc_gpio_driver);
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}
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return rc;
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}
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static void __exit sh_pfc_gpio_exit(void)
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{
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platform_device_unregister(&sh_pfc_gpio_device);
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platform_driver_unregister(&sh_pfc_gpio_driver);
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}
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module_init(sh_pfc_gpio_init);
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module_exit(sh_pfc_gpio_exit);
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MODULE_AUTHOR("Magnus Damm, Paul Mundt");
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MODULE_DESCRIPTION("GPIO driver for SuperH pin function controller");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:pfc-gpio");
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