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-rw-r--r--target/mips/mikrotik-rb4xx/patches/4.1.10/0008-gpio-add-GPIO-latch-driver.patch290
1 files changed, 0 insertions, 290 deletions
diff --git a/target/mips/mikrotik-rb4xx/patches/4.1.10/0008-gpio-add-GPIO-latch-driver.patch b/target/mips/mikrotik-rb4xx/patches/4.1.10/0008-gpio-add-GPIO-latch-driver.patch
deleted file mode 100644
index 188cec3b2..000000000
--- a/target/mips/mikrotik-rb4xx/patches/4.1.10/0008-gpio-add-GPIO-latch-driver.patch
+++ /dev/null
@@ -1,290 +0,0 @@
-From dd93d7e5b6530f1574860776fe6f960c4fd2661d Mon Sep 17 00:00:00 2001
-From: Phil Sutter <phil@nwl.cc>
-Date: Tue, 13 May 2014 00:21:54 +0200
-Subject: [PATCH] gpio: add GPIO latch driver
-
----
- drivers/gpio/Kconfig | 7 +
- drivers/gpio/Makefile | 1 +
- drivers/gpio/gpio-latch.c | 219 +++++++++++++++++++++++++++++++
- include/linux/platform_data/gpio-latch.h | 14 ++
- 4 files changed, 241 insertions(+)
- create mode 100644 drivers/gpio/gpio-latch.c
- create mode 100644 include/linux/platform_data/gpio-latch.h
-
-diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
-index 903f24d..905730b 100644
---- a/drivers/gpio/Kconfig
-+++ b/drivers/gpio/Kconfig
-@@ -834,4 +834,11 @@ config GPIO_VIPERBOARD
- River Tech's viperboard.h for detailed meaning
- of the module parameters.
-
-+comment "Other GPIO expanders"
-+
-+config GPIO_LATCH
-+ tristate "GPIO latch driver"
-+ help
-+ Say yes here to enable a GPIO latch driver.
-+
- endif
-diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
-index 5d50179..7d03524 100644
---- a/drivers/gpio/Makefile
-+++ b/drivers/gpio/Makefile
-@@ -36,6 +36,7 @@ obj-$(CONFIG_GPIO_KEMPLD) += gpio-kempld.o
- obj-$(CONFIG_ARCH_KS8695) += gpio-ks8695.o
- obj-$(CONFIG_GPIO_INTEL_MID) += gpio-intel-mid.o
- obj-$(CONFIG_GPIO_LP3943) += gpio-lp3943.o
-+obj-$(CONFIG_GPIO_LATCH) += gpio-latch.o
- obj-$(CONFIG_ARCH_LPC32XX) += gpio-lpc32xx.o
- obj-$(CONFIG_GPIO_LYNXPOINT) += gpio-lynxpoint.o
- obj-$(CONFIG_GPIO_MAX730X) += gpio-max730x.o
-diff --git a/drivers/gpio/gpio-latch.c b/drivers/gpio/gpio-latch.c
-new file mode 100644
-index 0000000..1efa1a1
---- /dev/null
-+++ b/drivers/gpio/gpio-latch.c
-@@ -0,0 +1,219 @@
-+/*
-+ * 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);
-+
-+ return gpiochip_remove(&glc->gc);;
-+}
-+
-+
-+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);
-diff --git a/include/linux/platform_data/gpio-latch.h b/include/linux/platform_data/gpio-latch.h
-new file mode 100644
-index 0000000..0450e67
---- /dev/null
-+++ b/include/linux/platform_data/gpio-latch.h
-@@ -0,0 +1,14 @@
-+#ifndef _GPIO_LATCH_H_
-+#define _GPIO_LATCH_H_
-+
-+#define GPIO_LATCH_DRIVER_NAME "gpio-latch"
-+
-+struct gpio_latch_platform_data {
-+ int base;
-+ int num_gpios;
-+ int *gpios;
-+ int le_gpio_index;
-+ bool le_active_low;
-+};
-+
-+#endif /* _GPIO_LATCH_H_ */
---
-1.8.5.3
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-20 20:41:27 +0000