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FAILED: patch "[PATCH] gpio: pca953x: Set IRQ type when handle Intel Galileo Gen 2" failed to apply to 5.4-stable tree

PATCH [email protected] 2 participants 2 messages Mar 12, 2021

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#0 lore raw

The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From eb441337c7147514ab45036cadf09c3a71e4ce31 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <[email protected]>
Date: Thu, 25 Feb 2021 18:33:20 +0200
Subject: [PATCH] gpio: pca953x: Set IRQ type when handle Intel Galileo Gen 2
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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 <[email protected]>
Acked-by Mika Westerberg <[email protected]>
Reviewed-by Linus Walleij <[email protected]>
drivers/gpio/gpio-pca953x.c +23 -55
index 5ea09fd01544..c91d05651596 100644
@@ -113,8 +113,29 @@ 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[] = {
 	{

@@ -133,59 +154,6 @@ static const struct dmi_system_id pca953x_dmi_acpi_irq_info[] = {
 	},
 	{}
 };
-
-#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[] = {
#1 lore raw
Quoted 5 lines · On Fri, Mar 12, 2021 at 01:27:06PM +0100, [email protected] wrote:

The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

Same here, it applies clean, compilation requires patch in the middle [1].

[1]: https://lore.kernel.org/stable/[email protected]/T/#u

Signature · 2 lines
With Best Regards,
Andy Shevchenko