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leds: bcm63138: Use scopes and guards

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Use scoped helpers and guards to handle DT node iterations
and spinlocks. This cuts some lines of code and eliminates
common mistakes (such as the missing of_node_put()).

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/20241010-bcm63138-leds-v4-2-cdb80780a555@linaro.org
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Linus Walleij 2024-10-10 16:10:51 +02:00 committed by Lee Jones
parent d19261ffd0
commit 61574073e1
1 changed files with 4 additions and 10 deletions
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14
drivers/leds/blink/leds-bcm63138.c
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@ -2,6 +2,7 @@
/*
* Copyright (C) 2021 Rafał Miłecki <rafal@milecki.pl>
*/
#include <linux/cleanup.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/leds.h>
@ -125,17 +126,14 @@ static void bcm63138_leds_brightness_set(struct led_classdev *led_cdev,
{
struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev);
struct bcm63138_leds *leds = led->leds;
unsigned long flags;
spin_lock_irqsave(&leds->lock, flags);
guard(spinlock_irqsave)(&leds->lock);
bcm63138_leds_enable_led(leds, led, value);
if (!value)
bcm63138_leds_set_flash_rate(leds, led, 0);
else
bcm63138_leds_set_bright(leds, led, value);
spin_unlock_irqrestore(&leds->lock, flags);
}
static int bcm63138_leds_blink_set(struct led_classdev *led_cdev,
@ -144,7 +142,6 @@ static int bcm63138_leds_blink_set(struct led_classdev *led_cdev,
{
struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev);
struct bcm63138_leds *leds = led->leds;
unsigned long flags;
u8 value;
if (!*delay_on && !*delay_off) {
@ -179,13 +176,11 @@ static int bcm63138_leds_blink_set(struct led_classdev *led_cdev,
return -EINVAL;
}
spin_lock_irqsave(&leds->lock, flags);
guard(spinlock_irqsave)(&leds->lock);
bcm63138_leds_enable_led(leds, led, BCM63138_MAX_BRIGHTNESS);
bcm63138_leds_set_flash_rate(leds, led, value);
spin_unlock_irqrestore(&leds->lock, flags);
return 0;
}
@ -259,7 +254,6 @@ static int bcm63138_leds_probe(struct platform_device *pdev)
struct device_node *np = dev_of_node(&pdev->dev);
struct device *dev = &pdev->dev;
struct bcm63138_leds *leds;
struct device_node *child;
leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
if (!leds)
@ -280,7 +274,7 @@ static int bcm63138_leds_probe(struct platform_device *pdev)
bcm63138_leds_write(leds, BCM63138_SERIAL_LED_POLARITY, 0);
bcm63138_leds_write(leds, BCM63138_PARALLEL_LED_POLARITY, 0);
for_each_available_child_of_node(np, child) {
for_each_available_child_of_node_scoped(np, child) {
bcm63138_leds_create_led(leds, child);
}