aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/ar71xx/files/drivers/gpio/gpio-latch.c
diff options
context:
space:
mode:
authorAdrian Schmutzler <freifunk@adrianschmutzler.de>2020-08-07 15:25:12 +0200
committerAdrian Schmutzler <freifunk@adrianschmutzler.de>2020-08-30 22:18:35 +0200
commit4e4ee4649553ab536225060a27fc320bf54e458c (patch)
tree711fbf5485f94baec8b708edba00c7250b923872 /target/linux/ar71xx/files/drivers/gpio/gpio-latch.c
parent47b2ee2d9a9a1790f9bf8a528640c333af39e4ba (diff)
downloadupstream-4e4ee4649553ab536225060a27fc320bf54e458c.tar.gz
upstream-4e4ee4649553ab536225060a27fc320bf54e458c.tar.bz2
upstream-4e4ee4649553ab536225060a27fc320bf54e458c.zip
ar71xx: drop target
This target has been mostly replaced by ath79 and won't be included in the upcoming release anymore. Finally put it to rest. This also removes all references in packages, tools, etc. as well as the uboot-ar71xx and vsc73x5-ucode packages. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Diffstat (limited to 'target/linux/ar71xx/files/drivers/gpio/gpio-latch.c')
-rw-r--r--target/linux/ar71xx/files/drivers/gpio/gpio-latch.c220
1 files changed, 0 insertions, 220 deletions
diff --git a/target/linux/ar71xx/files/drivers/gpio/gpio-latch.c b/target/linux/ar71xx/files/drivers/gpio/gpio-latch.c
deleted file mode 100644
index d911f6a2cb..0000000000
--- a/target/linux/ar71xx/files/drivers/gpio/gpio-latch.c
+++ /dev/null
@@ -1,220 +0,0 @@
-/*
- * GPIO latch driver
- *
- * Copyright (C) 2014 Gabor Juhos <juhosg@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/gpio.h>
-#include <linux/slab.h>
-#include <linux/platform_device.h>
-
-#include <linux/platform_data/gpio-latch.h>
-
-struct gpio_latch_chip {
- struct gpio_chip gc;
-
- struct mutex mutex;
- struct mutex latch_mutex;
- bool latch_enabled;
- int le_gpio;
- bool le_active_low;
- int *gpios;
-};
-
-static inline struct gpio_latch_chip *to_gpio_latch_chip(struct gpio_chip *gc)
-{
- return container_of(gc, struct gpio_latch_chip, gc);
-}
-
-static void gpio_latch_lock(struct gpio_latch_chip *glc, bool enable)
-{
- mutex_lock(&glc->mutex);
-
- if (enable)
- glc->latch_enabled = true;
-
- if (glc->latch_enabled)
- mutex_lock(&glc->latch_mutex);
-}
-
-static void gpio_latch_unlock(struct gpio_latch_chip *glc, bool disable)
-{
- if (glc->latch_enabled)
- mutex_unlock(&glc->latch_mutex);
-
- if (disable)
- glc->latch_enabled = true;
-
- mutex_unlock(&glc->mutex);
-}
-
-static int
-gpio_latch_get(struct gpio_chip *gc, unsigned offset)
-{
- struct gpio_latch_chip *glc = to_gpio_latch_chip(gc);
- int ret;
-
- gpio_latch_lock(glc, false);
- ret = gpio_get_value(glc->gpios[offset]);
- gpio_latch_unlock(glc, false);
-
- return ret;
-}
-
-static void
-gpio_latch_set(struct gpio_chip *gc, unsigned offset, int value)
-{
- struct gpio_latch_chip *glc = to_gpio_latch_chip(gc);
- bool enable_latch = false;
- bool disable_latch = false;
- int gpio;
-
- gpio = glc->gpios[offset];
-
- if (gpio == glc->le_gpio) {
- enable_latch = value ^ glc->le_active_low;
- disable_latch = !enable_latch;
- }
-
- gpio_latch_lock(glc, enable_latch);
- gpio_set_value(gpio, value);
- gpio_latch_unlock(glc, disable_latch);
-}
-
-static int
-gpio_latch_direction_input(struct gpio_chip *gc, unsigned offset)
-{
- struct gpio_latch_chip *glc = to_gpio_latch_chip(gc);
- int ret;
-
- gpio_latch_lock(glc, false);
- ret = gpio_direction_input(glc->gpios[offset]);
- gpio_latch_unlock(glc, false);
-
- return ret;
-}
-
-static int
-gpio_latch_direction_output(struct gpio_chip *gc, unsigned offset, int value)
-{
- struct gpio_latch_chip *glc = to_gpio_latch_chip(gc);
- bool enable_latch = false;
- bool disable_latch = false;
- int gpio;
- int ret;
-
- gpio = glc->gpios[offset];
-
- if (gpio == glc->le_gpio) {
- enable_latch = value ^ glc->le_active_low;
- disable_latch = !enable_latch;
- }
-
- gpio_latch_lock(glc, enable_latch);
- ret = gpio_direction_output(gpio, value);
- gpio_latch_unlock(glc, disable_latch);
-
- return ret;
-}
-
-static int gpio_latch_probe(struct platform_device *pdev)
-{
- struct gpio_latch_chip *glc;
- struct gpio_latch_platform_data *pdata;
- struct gpio_chip *gc;
- int size;
- int ret;
- int i;
-
- pdata = dev_get_platdata(&pdev->dev);
- if (!pdata)
- return -EINVAL;
-
- if (pdata->le_gpio_index >= pdata->num_gpios ||
- !pdata->num_gpios ||
- !pdata->gpios)
- return -EINVAL;
-
- for (i = 0; i < pdata->num_gpios; i++) {
- int gpio = pdata->gpios[i];
-
- ret = devm_gpio_request(&pdev->dev, gpio,
- GPIO_LATCH_DRIVER_NAME);
- if (ret)
- return ret;
- }
-
- glc = devm_kzalloc(&pdev->dev, sizeof(*glc), GFP_KERNEL);
- if (!glc)
- return -ENOMEM;
-
- mutex_init(&glc->mutex);
- mutex_init(&glc->latch_mutex);
-
- size = pdata->num_gpios * sizeof(glc->gpios[0]);
- glc->gpios = devm_kzalloc(&pdev->dev, size , GFP_KERNEL);
- if (!glc->gpios)
- return -ENOMEM;
-
- memcpy(glc->gpios, pdata->gpios, size);
-
- glc->le_gpio = glc->gpios[pdata->le_gpio_index];
- glc->le_active_low = pdata->le_active_low;
-
- gc = &glc->gc;
-
- gc->label = GPIO_LATCH_DRIVER_NAME;
- gc->base = pdata->base;
- gc->can_sleep = true;
- gc->ngpio = pdata->num_gpios;
- gc->get = gpio_latch_get;
- gc->set = gpio_latch_set;
- gc->direction_input = gpio_latch_direction_input,
- gc->direction_output = gpio_latch_direction_output;
-
- platform_set_drvdata(pdev, glc);
-
- ret = gpiochip_add(&glc->gc);
- if (ret)
- return ret;
-
- return 0;
-}
-
-static int gpio_latch_remove(struct platform_device *pdev)
-{
- struct gpio_latch_chip *glc = platform_get_drvdata(pdev);
-
- gpiochip_remove(&glc->gc);
- return 0;
-}
-
-
-static struct platform_driver gpio_latch_driver = {
- .probe = gpio_latch_probe,
- .remove = gpio_latch_remove,
- .driver = {
- .name = GPIO_LATCH_DRIVER_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-static int __init gpio_latch_init(void)
-{
- return platform_driver_register(&gpio_latch_driver);
-}
-
-postcore_initcall(gpio_latch_init);
-
-MODULE_DESCRIPTION("GPIO latch driver");
-MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" GPIO_LATCH_DRIVER_NAME);