linux-kernel - [PATCH] gpio: zynq: restore zynq_gpio_irq_reqres/zynq_gpio_irq

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Message-ID: <20230901122424.247070-1-daniel@zonque.org>
Date:   Fri,  1 Sep 2023 14:24:24 +0200
From:   Daniel Mack <daniel@...que.org>
To:     linux-gpio@...r.kernel.org, manikanta.guntupalli@....com
Cc:     linux-kernel@...r.kernel.org, Daniel Mack <daniel@...que.org>,
        stable@...nel.org
Subject: [PATCH] gpio: zynq: restore zynq_gpio_irq_reqres/zynq_gpio_irq_relres callbacks

Commit f56914393537 ("gpio: zynq: fix zynqmp_gpio not an immutable chip
warning") ditched the open-coded resource allocation handlers in favor
of the generic ones. These generic handlers don't maintain the PM
runtime anymore, which causes a regression in that level IRQs are no
longer reported.

Restore the original handlers to fix this.

Signed-off-by: Daniel Mack <daniel@...que.org>
Fixes: f56914393537 ("gpio: zynq: fix zynqmp_gpio not an immutable chip warning")
Cc: stable@...nel.org
---
 drivers/gpio/gpio-zynq.c | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c
index 0a7264aabe48..324e942c0650 100644
--- a/drivers/gpio/gpio-zynq.c
+++ b/drivers/gpio/gpio-zynq.c
@@ -575,6 +575,26 @@ static int zynq_gpio_set_wake(struct irq_data *data, unsigned int on)
 	return 0;
 }
 
+static int zynq_gpio_irq_reqres(struct irq_data *d)
+{
+	struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
+	int ret;
+
+	ret = pm_runtime_resume_and_get(chip->parent);
+	if (ret < 0)
+		return ret;
+
+	return gpiochip_reqres_irq(chip, d->hwirq);
+}
+
+static void zynq_gpio_irq_relres(struct irq_data *d)
+{
+	struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
+
+	gpiochip_relres_irq(chip, d->hwirq);
+	pm_runtime_put(chip->parent);
+}
+
 /* irq chip descriptor */
 static const struct irq_chip zynq_gpio_level_irqchip = {
 	.name		= DRIVER_NAME,
@@ -584,9 +604,10 @@ static const struct irq_chip zynq_gpio_level_irqchip = {
 	.irq_unmask	= zynq_gpio_irq_unmask,
 	.irq_set_type	= zynq_gpio_set_irq_type,
 	.irq_set_wake	= zynq_gpio_set_wake,
+	.irq_request_resources = zynq_gpio_irq_reqres,
+	.irq_release_resources = zynq_gpio_irq_relres,
 	.flags		= IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED |
 			  IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_IMMUTABLE,
-	GPIOCHIP_IRQ_RESOURCE_HELPERS,
 };
 
 static const struct irq_chip zynq_gpio_edge_irqchip = {
@@ -597,8 +618,9 @@ static const struct irq_chip zynq_gpio_edge_irqchip = {
 	.irq_unmask	= zynq_gpio_irq_unmask,
 	.irq_set_type	= zynq_gpio_set_irq_type,
 	.irq_set_wake	= zynq_gpio_set_wake,
+	.irq_request_resources = zynq_gpio_irq_reqres,
+	.irq_release_resources = zynq_gpio_irq_relres,
 	.flags		= IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_IMMUTABLE,
-	GPIOCHIP_IRQ_RESOURCE_HELPERS,
 };
 
 static void zynq_gpio_handle_bank_irq(struct zynq_gpio *gpio,
-- 
2.41.0