From: Greg Kroah-Hartman <gre...@linuxfoundation.org>
From: Andy Shevchenko <andriy.shevche...@linux.intel.com>
commit eb441337c7147514ab45036cadf09c3a71e4ce31 upstream.
The commit 0ea683931adb ("gpio: dwapb: Convert driver to using the
GPIO-lib-based IRQ-chip") indeliberately made a regression on how
IRQ line from GPIO I²C expander is handled. I.e. it reveals that
the quirk for Intel Galileo Gen 2 misses the part of setting IRQ type
which previously was predefined by gpio-dwapb driver. Now, we have to
reorganize the approach to call necessary parts, which can be done via
ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER quirk.
Without this fix and with above mentioned change the kernel hangs
on the first IRQ event with:
gpio gpiochip3: Persistence not supported for GPIO 1
irq 32, desc: 62f8fb50, depth: 0, count: 0, unhandled: 0
->handle_irq(): 41c7b0ab, handle_bad_irq+0x0/0x40
->irq_data.chip(): e03f1e72, 0xc2539218
->action(): 0ecc7e6f
->action->handler(): 8a3db21e, irq_default_primary_handler+0x0/0x10
IRQ_NOPROBE set
unexpected IRQ trap at vector 20
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.shevche...@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerb...@linux.intel.com>
Reviewed-by: Linus Walleij <linus.wall...@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpio/gpio-pca953x.c | 78 ++++++++++++--------------------------------
1 file changed, 23 insertions(+), 55 deletions(-)
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -112,8 +112,29 @@ MODULE_DEVICE_TABLE(i2c, pca953x_id);
#ifdef CONFIG_GPIO_PCA953X_IRQ
#include <linux/dmi.h>
-#include <linux/gpio.h>
-#include <linux/list.h>
+
+static const struct acpi_gpio_params pca953x_irq_gpios = { 0, 0, true };
+
+static const struct acpi_gpio_mapping pca953x_acpi_irq_gpios[] = {
+ { "irq-gpios", &pca953x_irq_gpios, 1, ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER },
+ { }
+};
+
+static int pca953x_acpi_get_irq(struct device *dev)
+{
+ int ret;
+
+ ret = devm_acpi_dev_add_driver_gpios(dev, pca953x_acpi_irq_gpios);
+ if (ret)
+ dev_warn(dev, "can't add GPIO ACPI mapping\n");
+
+ ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq-gpios", 0);
+ if (ret < 0)
+ return ret;
+
+ dev_info(dev, "ACPI interrupt quirk (IRQ %d)\n", ret);
+ return ret;
+}
static const struct dmi_system_id pca953x_dmi_acpi_irq_info[] = {
{
@@ -132,59 +153,6 @@ static const struct dmi_system_id pca953
},
{}
};
-
-#ifdef CONFIG_ACPI
-static int pca953x_acpi_get_pin(struct acpi_resource *ares, void *data)
-{
- struct acpi_resource_gpio *agpio;
- int *pin = data;
-
- if (acpi_gpio_get_irq_resource(ares, &agpio))
- *pin = agpio->pin_table[0];
- return 1;
-}
-
-static int pca953x_acpi_find_pin(struct device *dev)
-{
- struct acpi_device *adev = ACPI_COMPANION(dev);
- int pin = -ENOENT, ret;
- LIST_HEAD(r);
-
- ret = acpi_dev_get_resources(adev, &r, pca953x_acpi_get_pin, &pin);
- acpi_dev_free_resource_list(&r);
- if (ret < 0)
- return ret;
-
- return pin;
-}
-#else
-static inline int pca953x_acpi_find_pin(struct device *dev) { return -ENXIO; }
-#endif
-
-static int pca953x_acpi_get_irq(struct device *dev)
-{
- int pin, ret;
-
- pin = pca953x_acpi_find_pin(dev);
- if (pin < 0)
- return pin;
-
- dev_info(dev, "Applying ACPI interrupt quirk (GPIO %d)\n", pin);
-
- if (!gpio_is_valid(pin))
- return -EINVAL;
-
- ret = gpio_request(pin, "pca953x interrupt");
- if (ret)
- return ret;
-
- ret = gpio_to_irq(pin);
-
- /* When pin is used as an IRQ, no need to keep it requested */
- gpio_free(pin);
-
- return ret;
-}
#endif
static const struct acpi_device_id pca953x_acpi_ids[] = {
