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Merge tag 'gpio-fixes-for-v6.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

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Pull gpio fix from Bartosz Golaszewski:

 - add the shutdown() callback to gpio-mlxbf3 in order to disable
   interrupts during graceful reboot

* tag 'gpio-fixes-for-v6.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: mlxbf3: Support shutdown() function
This commit is contained in:
Linus Torvalds
2024-08-16 08:47:50 -07:00
parent d58c542a33 aad4183232
commit 9bd40f824a
1 changed files with 14 additions and 0 deletions
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14
drivers/gpio/gpio-mlxbf3.c
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@@ -39,6 +39,8 @@
#define MLXBF_GPIO_CAUSE_OR_EVTEN0 0x14
#define MLXBF_GPIO_CAUSE_OR_CLRCAUSE 0x18
#define MLXBF_GPIO_CLR_ALL_INTS GENMASK(31, 0)
struct mlxbf3_gpio_context {
struct gpio_chip gc;
@@ -82,6 +84,8 @@ static void mlxbf3_gpio_irq_disable(struct irq_data *irqd)
val = readl(gs->gpio_cause_io + MLXBF_GPIO_CAUSE_OR_EVTEN0);
val &= ~BIT(offset);
writel(val, gs->gpio_cause_io + MLXBF_GPIO_CAUSE_OR_EVTEN0);
writel(BIT(offset), gs->gpio_cause_io + MLXBF_GPIO_CAUSE_OR_CLRCAUSE);
raw_spin_unlock_irqrestore(&gs->gc.bgpio_lock, flags);
gpiochip_disable_irq(gc, offset);
@@ -253,6 +257,15 @@ static int mlxbf3_gpio_probe(struct platform_device *pdev)
return 0;
}
static void mlxbf3_gpio_shutdown(struct platform_device *pdev)
{
struct mlxbf3_gpio_context *gs = platform_get_drvdata(pdev);
/* Disable and clear all interrupts */
writel(0, gs->gpio_cause_io + MLXBF_GPIO_CAUSE_OR_EVTEN0);
writel(MLXBF_GPIO_CLR_ALL_INTS, gs->gpio_cause_io + MLXBF_GPIO_CAUSE_OR_CLRCAUSE);
}
static const struct acpi_device_id mlxbf3_gpio_acpi_match[] = {
{ "MLNXBF33", 0 },
{}
@@ -265,6 +278,7 @@ static struct platform_driver mlxbf3_gpio_driver = {
.acpi_match_table = mlxbf3_gpio_acpi_match,
},
.probe = mlxbf3_gpio_probe,
.shutdown = mlxbf3_gpio_shutdown,
};
module_platform_driver(mlxbf3_gpio_driver);