diff options
| author | Mario Limonciello <mario.limonciello@amd.com> | 2022-08-02 23:24:59 -0500 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2022-09-05 13:15:56 +0300 |
| commit | 6b6af7bd5718f4e45a9b930533aec1158387d552 (patch) | |
| tree | 8cc2000f90b99af9e427082cc0b66334f5edd00d /drivers/gpio | |
| parent | 568035b01cfb107af8d2e4bd2fb9aea22cf5b868 (diff) | |
| download | linux-6b6af7bd5718f4e45a9b930533aec1158387d552.tar.bz2 | |
gpiolib: acpi: Add support to ignore programming an interrupt
gpiolib-acpi already had support for ignoring a pin for wakeup, but
if an OEM configures a floating pin as an interrupt source then
stopping it from being a wakeup won't do much good to stop the
interrupt storm.
Add support for a module parameter and quirk infrastructure to
ignore interrupts as well.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib-acpi.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 9be1376f9a62..116faf8bda64 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -32,9 +32,16 @@ MODULE_PARM_DESC(ignore_wake, "controller@pin combos on which to ignore the ACPI wake flag " "ignore_wake=controller@pin[,controller@pin[,...]]"); +static char *ignore_interrupt; +module_param(ignore_interrupt, charp, 0444); +MODULE_PARM_DESC(ignore_interrupt, + "controller@pin combos on which to ignore interrupt " + "ignore_interrupt=controller@pin[,controller@pin[,...]]"); + struct acpi_gpiolib_dmi_quirk { bool no_edge_events_on_boot; char *ignore_wake; + char *ignore_interrupt; }; /** @@ -317,14 +324,15 @@ static struct gpio_desc *acpi_request_own_gpiod(struct gpio_chip *chip, return desc; } -static bool acpi_gpio_in_ignore_list(const char *controller_in, unsigned int pin_in) +static bool acpi_gpio_in_ignore_list(const char *ignore_list, const char *controller_in, + unsigned int pin_in) { const char *controller, *pin_str; unsigned int pin; char *endp; int len; - controller = ignore_wake; + controller = ignore_list; while (controller) { pin_str = strchr(controller, '@'); if (!pin_str) @@ -348,7 +356,7 @@ static bool acpi_gpio_in_ignore_list(const char *controller_in, unsigned int pin return false; err: - pr_err_once("Error: Invalid value for gpiolib_acpi.ignore_wake: %s\n", ignore_wake); + pr_err_once("Error: Invalid value for gpiolib_acpi.ignore_...: %s\n", ignore_list); return false; } @@ -360,7 +368,7 @@ static bool acpi_gpio_irq_is_wake(struct device *parent, if (agpio->wake_capable != ACPI_WAKE_CAPABLE) return false; - if (acpi_gpio_in_ignore_list(dev_name(parent), pin)) { + if (acpi_gpio_in_ignore_list(ignore_wake, dev_name(parent), pin)) { dev_info(parent, "Ignoring wakeup on pin %u\n", pin); return false; } @@ -427,6 +435,11 @@ static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares, goto fail_unlock_irq; } + if (acpi_gpio_in_ignore_list(ignore_interrupt, dev_name(chip->parent), pin)) { + dev_info(chip->parent, "Ignoring interrupt on pin %u\n", pin); + return AE_OK; + } + event = kzalloc(sizeof(*event), GFP_KERNEL); if (!event) goto fail_unlock_irq; @@ -1585,6 +1598,9 @@ static int __init acpi_gpio_setup_params(void) if (ignore_wake == NULL && quirk && quirk->ignore_wake) ignore_wake = quirk->ignore_wake; + if (ignore_interrupt == NULL && quirk && quirk->ignore_interrupt) + ignore_interrupt = quirk->ignore_interrupt; + return 0; } |