This is a note to let you know that I've just added the patch titled
gpiolib: acpi: Add ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER quirk
to the 5.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
gpiolib-acpi-add-acpi_gpio_quirk_absolute_number-quirk.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 62d5247d239d4b48762192a251c647d7c997616a Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Date: Thu, 25 Feb 2021 18:33:18 +0200
Subject: gpiolib: acpi: Add ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER quirk
From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
commit 62d5247d239d4b48762192a251c647d7c997616a upstream.
On some systems the ACPI tables has wrong pin number and instead of
having a relative one it provides an absolute one in the global GPIO
number space.
Add ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER quirk to cope with such cases.
Fixes: ba8c90c61847 ("gpio: pca953x: Override IRQ for one of the expanders on Galileo Gen 2")
Depends-on: 0ea683931adb ("gpio: dwapb: Convert driver to using the GPIO-lib-based IRQ-chip")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Acked-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpio/gpiolib-acpi.c | 7 ++++++-
include/linux/gpio/consumer.h | 2 ++
2 files changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -677,6 +677,7 @@ static int acpi_populate_gpio_lookup(str
if (!lookup->desc) {
const struct acpi_resource_gpio *agpio = &ares->data.gpio;
bool gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT;
+ struct gpio_desc *desc;
u16 pin_index;
if (lookup->info.quirks & ACPI_GPIO_QUIRK_ONLY_GPIOIO && gpioint)
@@ -689,8 +690,12 @@ static int acpi_populate_gpio_lookup(str
if (pin_index >= agpio->pin_table_length)
return 1;
- lookup->desc = acpi_get_gpiod(agpio->resource_source.string_ptr,
+ if (lookup->info.quirks & ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER)
+ desc = gpio_to_desc(agpio->pin_table[pin_index]);
+ else
+ desc = acpi_get_gpiod(agpio->resource_source.string_ptr,
agpio->pin_table[pin_index]);
+ lookup->desc = desc;
lookup->info.pin_config = agpio->pin_config;
lookup->info.debounce = agpio->debounce_timeout;
lookup->info.gpioint = gpioint;
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -674,6 +674,8 @@ struct acpi_gpio_mapping {
* get GpioIo type explicitly, this quirk may be used.
*/
#define ACPI_GPIO_QUIRK_ONLY_GPIOIO BIT(1)
+/* Use given pin as an absolute GPIO number in the system */
+#define ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER BIT(2)
unsigned int quirks;
};
Patches currently in stable-queue which might be from andriy.shevchenko@xxxxxxxxxxxxxxx are
queue-5.11/gpio-pca953x-set-irq-type-when-handle-intel-galileo-gen-2.patch
queue-5.11/gpiolib-read-gpio-line-names-from-a-firmware-node.patch
queue-5.11/gpiolib-acpi-add-acpi_gpio_quirk_absolute_number-quirk.patch
queue-5.11/gpiolib-acpi-allow-to-find-gpioint-resource-by-name-and-index.patch
