CONFIG_GPIO_ATH79=y
CONFIG_GPIO_CDEV=y
CONFIG_GPIO_GENERIC=y
-# CONFIG_GPIO_LATCH is not set
+# CONFIG_GPIO_LATCH_MIKROTIK is not set
# CONFIG_GPIO_RB91X_KEY is not set
CONFIG_HARDWARE_WATCHPOINTS=y
CONFIG_HAS_DMA=y
};
gpio_latch: gpio_latch {
- compatible = "gpio-latch";
+ compatible = "gpio-latch-mikrotik";
gpio-controller;
#gpio-cells = <2>;
gpios = <&gpio 0 GPIO_ACTIVE_HIGH>,
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * GPIO latch driver
+ *
+ * Copyright (C) 2014 Gabor Juhos <juhosg@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+#include <linux/platform_device.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
+
+#define GPIO_LATCH_DRIVER_NAME "gpio-latch-mikrotik"
+#define GPIO_LATCH_LINES 9
+
+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;
+ struct gpio_desc *gpios[GPIO_LATCH_LINES];
+};
+
+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 = gpiod_get_raw_value_cansleep(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;
+
+ if (offset == glc->le_gpio) {
+ enable_latch = value ^ glc->le_active_low;
+ disable_latch = !enable_latch;
+ }
+
+ gpio_latch_lock(glc, enable_latch);
+ gpiod_set_raw_value_cansleep(glc->gpios[offset], value);
+ gpio_latch_unlock(glc, disable_latch);
+}
+
+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 ret;
+
+ if (offset == glc->le_gpio) {
+ enable_latch = value ^ glc->le_active_low;
+ disable_latch = !enable_latch;
+ }
+
+ gpio_latch_lock(glc, enable_latch);
+ ret = gpiod_direction_output_raw(glc->gpios[offset], 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_chip *gc;
+ struct device *dev = &pdev->dev;
+ struct fwnode_handle *fwnode = dev->fwnode;
+ int i, n;
+
+ glc = devm_kzalloc(dev, sizeof(*glc), GFP_KERNEL);
+ if (!glc)
+ return -ENOMEM;
+
+ mutex_init(&glc->mutex);
+ mutex_init(&glc->latch_mutex);
+
+ n = gpiod_count(dev, NULL);
+ if (n <= 0) {
+ dev_err(dev, "failed to get gpios: %d\n", n);
+ return n;
+ } else if (n != GPIO_LATCH_LINES) {
+ dev_err(dev, "expected %d gpios\n", GPIO_LATCH_LINES);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < n; i++) {
+ glc->gpios[i] = devm_gpiod_get_index_optional(dev, NULL, i,
+ GPIOD_OUT_LOW);
+ if (IS_ERR(glc->gpios[i])) {
+ if (PTR_ERR(glc->gpios[i]) != -EPROBE_DEFER) {
+ dev_err(dev, "failed to get gpio %d: %ld\n", i,
+ PTR_ERR(glc->gpios[i]));
+ }
+ return PTR_ERR(glc->gpios[i]);
+ }
+ }
+
+ glc->le_gpio = 8;
+ glc->le_active_low = gpiod_is_active_low(glc->gpios[glc->le_gpio]);
+
+ if (!glc->gpios[glc->le_gpio]) {
+ dev_err(dev, "missing required latch-enable gpio %d\n",
+ glc->le_gpio);
+ return -EINVAL;
+ }
+
+ gc = &glc->gc;
+ gc->label = GPIO_LATCH_DRIVER_NAME;
+ gc->can_sleep = true;
+ gc->base = -1;
+ gc->ngpio = GPIO_LATCH_LINES;
+ gc->get = gpio_latch_get;
+ gc->set = gpio_latch_set;
+ gc->direction_output = gpio_latch_direction_output;
+ gc->fwnode = fwnode;
+
+ platform_set_drvdata(pdev, glc);
+
+ i = gpiochip_add(&glc->gc);
+ if (i) {
+ dev_err(dev, "gpiochip_add() failed: %d\n", i);
+ return i;
+ }
+
+ 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 const struct of_device_id gpio_latch_match[] = {
+ { .compatible = GPIO_LATCH_DRIVER_NAME },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, gpio_latch_match);
+
+static struct platform_driver gpio_latch_driver = {
+ .probe = gpio_latch_probe,
+ .remove = gpio_latch_remove,
+ .driver = {
+ .name = GPIO_LATCH_DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = gpio_latch_match,
+ },
+};
+
+module_platform_driver(gpio_latch_driver);
+
+MODULE_DESCRIPTION("GPIO latch driver");
+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
+MODULE_AUTHOR("Denis Kalashnikov <denis281089@gmail.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" GPIO_LATCH_DRIVER_NAME);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * GPIO latch driver
- *
- * Copyright (C) 2014 Gabor Juhos <juhosg@openwrt.org>
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/gpio/consumer.h>
-#include <linux/gpio/driver.h>
-#include <linux/platform_device.h>
-#include <linux/of_platform.h>
-#include <linux/of_gpio.h>
-
-#define GPIO_LATCH_DRIVER_NAME "gpio-latch"
-#define GPIO_LATCH_LINES 9
-
-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;
- struct gpio_desc *gpios[GPIO_LATCH_LINES];
-};
-
-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 = gpiod_get_raw_value_cansleep(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;
-
- if (offset == glc->le_gpio) {
- enable_latch = value ^ glc->le_active_low;
- disable_latch = !enable_latch;
- }
-
- gpio_latch_lock(glc, enable_latch);
- gpiod_set_raw_value_cansleep(glc->gpios[offset], value);
- gpio_latch_unlock(glc, disable_latch);
-}
-
-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 ret;
-
- if (offset == glc->le_gpio) {
- enable_latch = value ^ glc->le_active_low;
- disable_latch = !enable_latch;
- }
-
- gpio_latch_lock(glc, enable_latch);
- ret = gpiod_direction_output_raw(glc->gpios[offset], 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_chip *gc;
- struct device *dev = &pdev->dev;
- struct fwnode_handle *fwnode = dev->fwnode;
- int i, n;
-
- glc = devm_kzalloc(dev, sizeof(*glc), GFP_KERNEL);
- if (!glc)
- return -ENOMEM;
-
- mutex_init(&glc->mutex);
- mutex_init(&glc->latch_mutex);
-
- n = gpiod_count(dev, NULL);
- if (n <= 0) {
- dev_err(dev, "failed to get gpios: %d\n", n);
- return n;
- } else if (n != GPIO_LATCH_LINES) {
- dev_err(dev, "expected %d gpios\n", GPIO_LATCH_LINES);
- return -EINVAL;
- }
-
- for (i = 0; i < n; i++) {
- glc->gpios[i] = devm_gpiod_get_index_optional(dev, NULL, i,
- GPIOD_OUT_LOW);
- if (IS_ERR(glc->gpios[i])) {
- if (PTR_ERR(glc->gpios[i]) != -EPROBE_DEFER) {
- dev_err(dev, "failed to get gpio %d: %ld\n", i,
- PTR_ERR(glc->gpios[i]));
- }
- return PTR_ERR(glc->gpios[i]);
- }
- }
-
- glc->le_gpio = 8;
- glc->le_active_low = gpiod_is_active_low(glc->gpios[glc->le_gpio]);
-
- if (!glc->gpios[glc->le_gpio]) {
- dev_err(dev, "missing required latch-enable gpio %d\n",
- glc->le_gpio);
- return -EINVAL;
- }
-
- gc = &glc->gc;
- gc->label = GPIO_LATCH_DRIVER_NAME;
- gc->can_sleep = true;
- gc->base = -1;
- gc->ngpio = GPIO_LATCH_LINES;
- gc->get = gpio_latch_get;
- gc->set = gpio_latch_set;
- gc->direction_output = gpio_latch_direction_output;
- gc->fwnode = fwnode;
-
- platform_set_drvdata(pdev, glc);
-
- i = gpiochip_add(&glc->gc);
- if (i) {
- dev_err(dev, "gpiochip_add() failed: %d\n", i);
- return i;
- }
-
- 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 const struct of_device_id gpio_latch_match[] = {
- { .compatible = GPIO_LATCH_DRIVER_NAME },
- {},
-};
-
-MODULE_DEVICE_TABLE(of, gpio_latch_match);
-
-static struct platform_driver gpio_latch_driver = {
- .probe = gpio_latch_probe,
- .remove = gpio_latch_remove,
- .driver = {
- .name = GPIO_LATCH_DRIVER_NAME,
- .owner = THIS_MODULE,
- .of_match_table = gpio_latch_match,
- },
-};
-
-module_platform_driver(gpio_latch_driver);
-
-MODULE_DESCRIPTION("GPIO latch driver");
-MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
-MODULE_AUTHOR("Denis Kalashnikov <denis281089@gmail.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" GPIO_LATCH_DRIVER_NAME);
CONFIG_CRYPTO_HASH_INFO=y
CONFIG_CRYPTO_LZO=y
CONFIG_CRYPTO_ZSTD=y
-CONFIG_GPIO_LATCH=y
+CONFIG_GPIO_LATCH_MIKROTIK=y
CONFIG_GPIO_RB4XX=y
CONFIG_GPIO_RB91X_KEY=y
CONFIG_GPIO_WATCHDOG=y
If unsure, say N.
-+config GPIO_LATCH
++config GPIO_LATCH_MIKROTIK
+ tristate "MikroTik RouterBOARD GPIO latch support"
+ depends on ATH79
+ help
obj-$(CONFIG_GPIO_IXP4XX) += gpio-ixp4xx.o
obj-$(CONFIG_GPIO_JANZ_TTL) += gpio-janz-ttl.o
obj-$(CONFIG_GPIO_KEMPLD) += gpio-kempld.o
-+obj-$(CONFIG_GPIO_LATCH) += gpio-latch.o
++obj-$(CONFIG_GPIO_LATCH_MIKROTIK) += gpio-latch-mikrotik.o
obj-$(CONFIG_GPIO_LOGICVC) += gpio-logicvc.o
obj-$(CONFIG_GPIO_LOONGSON1) += gpio-loongson1.o
obj-$(CONFIG_GPIO_LOONGSON) += gpio-loongson.o
projects / openwrt / openwrt.git / commitdiff