Patch "gpio: tqmx86: Convert to immutable irq_chip" has been added to the 5.10-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    gpio: tqmx86: Convert to immutable irq_chip

to the 5.10-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:
     gpio-tqmx86-convert-to-immutable-irq_chip.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 373d1c7067ad2aad97d5174ed0ed8feb2b6d342a
Author: Linus Walleij <linus.walleij@xxxxxxxxxx>
Date:   Mon Mar 20 10:55:12 2023 +0100

    gpio: tqmx86: Convert to immutable irq_chip
    
    [ Upstream commit 8e43827b6ae727a745ce7a8cc19184b28905a965 ]
    
    Convert the driver to immutable irq-chip with a bit of
    intuition.
    
    Cc: Marc Zyngier <maz@xxxxxxxxxx>
    Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
    Reviewed-by: Marc Zyngier <maz@xxxxxxxxxx>
    Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
    Stable-dep-of: 08af509efdf8 ("gpio: tqmx86: store IRQ trigger type and unmask status separately")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpio/gpio-tqmx86.c b/drivers/gpio/gpio-tqmx86.c
index e8360921ee23a..d58fd82b71a8d 100644
--- a/drivers/gpio/gpio-tqmx86.c
+++ b/drivers/gpio/gpio-tqmx86.c
@@ -16,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/seq_file.h>
 #include <linux/slab.h>
 
 #define TQMX86_NGPIO	8
@@ -35,7 +36,6 @@
 
 struct tqmx86_gpio_data {
 	struct gpio_chip	chip;
-	struct irq_chip		irq_chip;
 	void __iomem		*io_base;
 	int			irq;
 	raw_spinlock_t		spinlock;
@@ -119,6 +119,7 @@ static void tqmx86_gpio_irq_mask(struct irq_data *data)
 	gpiic &= ~mask;
 	tqmx86_gpio_write(gpio, gpiic, TQMX86_GPIIC);
 	raw_spin_unlock_irqrestore(&gpio->spinlock, flags);
+	gpiochip_disable_irq(&gpio->chip, irqd_to_hwirq(data));
 }
 
 static void tqmx86_gpio_irq_unmask(struct irq_data *data)
@@ -131,6 +132,7 @@ static void tqmx86_gpio_irq_unmask(struct irq_data *data)
 
 	mask = TQMX86_GPII_MASK << (offset * TQMX86_GPII_BITS);
 
+	gpiochip_enable_irq(&gpio->chip, irqd_to_hwirq(data));
 	raw_spin_lock_irqsave(&gpio->spinlock, flags);
 	gpiic = tqmx86_gpio_read(gpio, TQMX86_GPIIC);
 	gpiic &= ~mask;
@@ -225,6 +227,22 @@ static void tqmx86_init_irq_valid_mask(struct gpio_chip *chip,
 	clear_bit(3, valid_mask);
 }
 
+static void tqmx86_gpio_irq_print_chip(struct irq_data *d, struct seq_file *p)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+	seq_printf(p, gc->label);
+}
+
+static const struct irq_chip tqmx86_gpio_irq_chip = {
+	.irq_mask = tqmx86_gpio_irq_mask,
+	.irq_unmask = tqmx86_gpio_irq_unmask,
+	.irq_set_type = tqmx86_gpio_irq_set_type,
+	.irq_print_chip = tqmx86_gpio_irq_print_chip,
+	.flags = IRQCHIP_IMMUTABLE,
+	GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
 static int tqmx86_gpio_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -281,14 +299,8 @@ static int tqmx86_gpio_probe(struct platform_device *pdev)
 	pm_runtime_enable(&pdev->dev);
 
 	if (irq > 0) {
-		struct irq_chip *irq_chip = &gpio->irq_chip;
 		u8 irq_status;
 
-		irq_chip->name = chip->label;
-		irq_chip->irq_mask = tqmx86_gpio_irq_mask;
-		irq_chip->irq_unmask = tqmx86_gpio_irq_unmask;
-		irq_chip->irq_set_type = tqmx86_gpio_irq_set_type;
-
 		/* Mask all interrupts */
 		tqmx86_gpio_write(gpio, 0, TQMX86_GPIIC);
 
@@ -297,7 +309,7 @@ static int tqmx86_gpio_probe(struct platform_device *pdev)
 		tqmx86_gpio_write(gpio, irq_status, TQMX86_GPIIS);
 
 		girq = &chip->irq;
-		girq->chip = irq_chip;
+		gpio_irq_chip_set_chip(girq, &tqmx86_gpio_irq_chip);
 		girq->parent_handler = tqmx86_gpio_irq_handler;
 		girq->num_parents = 1;
 		girq->parents = devm_kcalloc(&pdev->dev, 1,