diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/901-fix_irq_type_of_pca953x.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/901-fix_irq_type_of_pca953x.patch | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/901-fix_irq_type_of_pca953x.patch b/target/linux/layerscape/patches-5.4/901-fix_irq_type_of_pca953x.patch new file mode 100644 index 0000000000..a00a240135 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/901-fix_irq_type_of_pca953x.patch @@ -0,0 +1,28 @@ +From 12de4b5e7cbcd193d5abb753ca511fe8f2236846 Mon Sep 17 00:00:00 2001 +From: Pawel Dembicki <paweldembicki@gmail.com> +Date: Fri, 13 Nov 2020 07:30:03 +0100 +Subject: [PATCH 1/1] gpio-pca953x: hack: Allow to use falling trigger + +Gpio-mpc8xxx driver of Layerscape gpio support only edge interrupts. +Gpio-pca953x allow only low state trigger. This hack fix the problem. + +Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com> +--- + +--- a/drivers/gpio/gpio-pca953x.c ++++ b/drivers/gpio/gpio-pca953x.c +@@ -879,10 +879,12 @@ static int pca953x_irq_setup(struct pca9 + for (i = 0; i < NBANK(chip); i++) + chip->irq_stat[i] &= reg_direction[i]; + mutex_init(&chip->irq_lock); +- ++ /* gpio-mpc8xxx driver of Layerscape gpio support only edge interrupts. ++ * This hack fix the problem. ++ */ + ret = devm_request_threaded_irq(&client->dev, client->irq, + NULL, pca953x_irq_handler, +- IRQF_TRIGGER_LOW | IRQF_ONESHOT | ++ IRQF_TRIGGER_FALLING | IRQF_ONESHOT | + IRQF_SHARED, + dev_name(&client->dev), chip); + if (ret) { |