add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/gpio/gpiolib-sysfs.c
..
..
@@ -1,8 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0
1
2
 #include <linux/idr.h>
2
3
 #include <linux/mutex.h>
3
4
 #include <linux/device.h>
4
5
 #include <linux/sysfs.h>
5
-#include <linux/gpio.h>
6
6
 #include <linux/gpio/consumer.h>
7
7
 #include <linux/gpio/driver.h>
8
8
 #include <linux/interrupt.h>
..
..
@@ -11,6 +11,7 @@
11
11
 #include <linux/ctype.h>
12
12
 
13
13
 #include "gpiolib.h"
14
+#include "gpiolib-sysfs.h"
14
15
 
15
16
 #define GPIO_IRQF_TRIGGER_FALLING	BIT(0)
16
17
 #define GPIO_IRQF_TRIGGER_RISING	BIT(1)
..
..
@@ -80,18 +81,13 @@
80
81
 	struct gpiod_data *data = dev_get_drvdata(dev);
81
82
 	struct gpio_desc *desc = data->desc;
82
83
 	ssize_t			status;
83
-	int offset;
84
84
 
85
85
 	mutex_lock(&data->mutex);
86
86
 
87
-	offset = gpio_chip_hwgpio(desc);
88
87
 	if (sysfs_streq(buf, "high"))
89
88
 		status = gpiod_direction_output_raw(desc, 1);
90
89
 	else if (sysfs_streq(buf, "out") || sysfs_streq(buf, "low"))
91
-		if (( offset == 26 ) || ( offset == 25 ) || ( offset == 27 ))
92
-			status = gpiod_direction_output_raw(desc, 1);
93
-		else
94
-			status = gpiod_direction_output_raw(desc, 0);
90
+		status = gpiod_direction_output_raw(desc, 0);
95
91
 	else if (sysfs_streq(buf, "in"))
96
92
 		status = gpiod_direction_input(desc);
97
93
 	else
..
..
@@ -370,7 +366,7 @@
370
366
 static umode_t gpio_is_visible(struct kobject *kobj, struct attribute *attr,
371
367
 			       int n)
372
368
 {
373
-	struct device *dev = container_of(kobj, struct device, kobj);
369
+	struct device *dev = kobj_to_dev(kobj);
374
370
 	struct gpiod_data *data = dev_get_drvdata(dev);
375
371
 	struct gpio_desc *desc = data->desc;
376
372
 	umode_t mode = attr->mode;
..
..
@@ -449,11 +445,6 @@
449
445
 };
450
446
 ATTRIBUTE_GROUPS(gpiochip);
451
447
 
452
-static struct gpio_desc *gpio_to_valid_desc(int gpio)
453
-{
454
-	return gpio_is_valid(gpio) ? gpio_to_desc(gpio) : NULL;
455
-}
456
-
457
448
 /*
458
449
  * /sys/class/gpio/export ... write-only
459
450
  *	integer N ... number of GPIO to export (full access)
..
..
@@ -474,7 +465,7 @@
474
465
 	if (status < 0)
475
466
 		goto done;
476
467
 
477
-	desc = gpio_to_valid_desc(gpio);
468
+	desc = gpio_to_desc(gpio);
478
469
 	/* reject invalid GPIOs */
479
470
 	if (!desc) {
480
471
 		pr_warn("%s: invalid GPIO %ld\n", __func__, gpio);
..
..
@@ -527,7 +518,7 @@
527
518
 	if (status < 0)
528
519
 		goto done;
529
520
 
530
-	desc = gpio_to_valid_desc(gpio);
521
+	desc = gpio_to_desc(gpio);
531
522
 	/* reject bogus commands (gpio_unexport ignores them) */
532
523
 	if (!desc) {
533
524
 		pr_warn("%s: invalid GPIO %ld\n", __func__, gpio);
..
..
@@ -780,10 +771,9 @@
780
771
 		parent = &gdev->dev;
781
772
 
782
773
 	/* use chip->base for the ID; it's already known to be unique */
783
-	dev = device_create_with_groups(&gpio_class, parent,
784
-					MKDEV(0, 0),
785
-					chip, gpiochip_groups,
786
-					"gpiochip%d", chip->base);
774
+	dev = device_create_with_groups(&gpio_class, parent, MKDEV(0, 0), chip,
775
+					gpiochip_groups, GPIOCHIP_NAME "%d",
776
+					chip->base);
787
777
 	if (IS_ERR(dev))
788
778
 		return PTR_ERR(dev);
789
779