add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/gpio/gpiolib-sysfs.c
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@@ -1,8 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0
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 #include <linux/idr.h>
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 #include <linux/mutex.h>
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 #include <linux/device.h>
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 #include <linux/sysfs.h>
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-#include <linux/gpio.h>
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 #include <linux/gpio/consumer.h>
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 #include <linux/gpio/driver.h>
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 #include <linux/interrupt.h>
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@@ -11,6 +11,7 @@
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 #include <linux/ctype.h>
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 #include "gpiolib.h"
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+#include "gpiolib-sysfs.h"
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 #define GPIO_IRQF_TRIGGER_FALLING	BIT(0)
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 #define GPIO_IRQF_TRIGGER_RISING	BIT(1)
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@@ -365,7 +366,7 @@
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 static umode_t gpio_is_visible(struct kobject *kobj, struct attribute *attr,
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 			       int n)
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 {
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-	struct device *dev = container_of(kobj, struct device, kobj);
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+	struct device *dev = kobj_to_dev(kobj);
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 	struct gpiod_data *data = dev_get_drvdata(dev);
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 	struct gpio_desc *desc = data->desc;
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 	umode_t mode = attr->mode;
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@@ -444,11 +445,6 @@
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 };
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 ATTRIBUTE_GROUPS(gpiochip);
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-static struct gpio_desc *gpio_to_valid_desc(int gpio)
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-{
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-	return gpio_is_valid(gpio) ? gpio_to_desc(gpio) : NULL;
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-}
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-
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 /*
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  * /sys/class/gpio/export ... write-only
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  *	integer N ... number of GPIO to export (full access)
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@@ -469,7 +465,7 @@
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 	if (status < 0)
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 		goto done;
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-	desc = gpio_to_valid_desc(gpio);
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+	desc = gpio_to_desc(gpio);
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 	/* reject invalid GPIOs */
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 	if (!desc) {
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 		pr_warn("%s: invalid GPIO %ld\n", __func__, gpio);
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@@ -522,7 +518,7 @@
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 	if (status < 0)
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 		goto done;
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-	desc = gpio_to_valid_desc(gpio);
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+	desc = gpio_to_desc(gpio);
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 	/* reject bogus commands (gpio_unexport ignores them) */
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 	if (!desc) {
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 		pr_warn("%s: invalid GPIO %ld\n", __func__, gpio);
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@@ -775,10 +771,9 @@
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 		parent = &gdev->dev;
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 	/* use chip->base for the ID; it's already known to be unique */
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-	dev = device_create_with_groups(&gpio_class, parent,
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-					MKDEV(0, 0),
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-					chip, gpiochip_groups,
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-					"gpiochip%d", chip->base);
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+	dev = device_create_with_groups(&gpio_class, parent, MKDEV(0, 0), chip,
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+					gpiochip_groups, GPIOCHIP_NAME "%d",
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+					chip->base);
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 	if (IS_ERR(dev))
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 		return PTR_ERR(dev);
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