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Fix gryphon LED module crash.

Browse source 
Update gryphon LED module to work with Linux 4.1
and not to crash when 'gpiod_get_index()' fails.

Change-Id: I27fcbe3ad9dbc755eabdd3f2120544b171b07885
This commit is contained in:
Markus Gothe 2020-08-05 11:14:37 +02:00 • committed by Sukru Senli
parent 7978a656a7
commit 6e35356954
1 changed files with 16 additions and 2 deletions
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18
gryphon-led-module/src/main.c
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@ -129,6 +129,8 @@ static int canyon_led_probe(struct platform_device *pdev)
if (ret < 0) { if (ret < 0) {
dev_warn(&pdev->dev, "Could not read led-count property\n"); dev_warn(&pdev->dev, "Could not read led-count property\n");
leds->led_count = SK9822_DEFAULT_NUM_LEDS; leds->led_count = SK9822_DEFAULT_NUM_LEDS;
} else {
printk(KERN_INFO "Got led count: %u\n", leds->led_count);
} }
leds->led_colors = devm_kzalloc(&pdev->dev, leds->led_colors = devm_kzalloc(&pdev->dev,
@ -140,7 +142,7 @@ static int canyon_led_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, leds); platform_set_drvdata(pdev, leds);
#if LINUX_VERSION_CODE <= KERNEL_VERSION(3, 16, 0) #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
leds->clock_gpio = gpiod_get_index(&pdev->dev, "led", 0); leds->clock_gpio = gpiod_get_index(&pdev->dev, "led", 0);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0) #elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)
leds->clock_gpio = gpiod_get_index(&pdev->dev, "led", 0, GPIOD_OUT_HIGH); leds->clock_gpio = gpiod_get_index(&pdev->dev, "led", 0, GPIOD_OUT_HIGH);
@ -148,6 +150,12 @@ static int canyon_led_probe(struct platform_device *pdev)
dev_warn(&pdev->dev, "Kernel version Not supported\n"); dev_warn(&pdev->dev, "Kernel version Not supported\n");
exit(1); exit(1);
#endif #endif
if (IS_ERR(leds->clock_gpio)) {
dev_err(&pdev->dev, "Failed to acquire clock GPIO %ld\n",
PTR_ERR(leds->clock_gpio));
leds->clock_gpio = NULL;
return PTR_ERR(leds->clock_gpio);
}
gpiod_direction_output(leds->clock_gpio, 1); gpiod_direction_output(leds->clock_gpio, 1);
if (IS_ERR(leds->clock_gpio)) { if (IS_ERR(leds->clock_gpio)) {
@ -160,7 +168,7 @@ static int canyon_led_probe(struct platform_device *pdev)
gpiod_set_value(leds->clock_gpio, 0); gpiod_set_value(leds->clock_gpio, 0);
} }
#if LINUX_VERSION_CODE <= KERNEL_VERSION(3, 16, 0) #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
leds->data_gpio = gpiod_get_index(&pdev->dev, "led", 1); leds->data_gpio = gpiod_get_index(&pdev->dev, "led", 1);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0) #elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)
leds->data_gpio = gpiod_get_index(&pdev->dev, "led", 1, GPIOD_OUT_HIGH); leds->data_gpio = gpiod_get_index(&pdev->dev, "led", 1, GPIOD_OUT_HIGH);
@ -168,6 +176,12 @@ static int canyon_led_probe(struct platform_device *pdev)
dev_warn(&pdev->dev, "Kernel version Not supported\n"); dev_warn(&pdev->dev, "Kernel version Not supported\n");
exit(1); exit(1);
#endif #endif
if (IS_ERR(leds->data_gpio)) {
dev_err(&pdev->dev, "Failed to acquire data GPIO %ld\n",
PTR_ERR(leds->data_gpio));
leds->data_gpio = NULL;
return PTR_ERR(leds->data_gpio);
}
gpiod_direction_output(leds->data_gpio, 1); gpiod_direction_output(leds->data_gpio, 1);
if (IS_ERR(leds->data_gpio)) { if (IS_ERR(leds->data_gpio)) {