[PATCH 4/9] gpio: thunderx: Convert to immutable irq_chip

From: Linus Walleij <linus.walleij@linaro.org>
To: linux-gpio@vger.kernel.org, "Bartosz Golaszewski" <brgl@bgdev.pl>,
	"Manivannan Sadhasivam" <mani@kernel.org>,
	"Thorsten Scherer" <t.scherer@eckelmann.de>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Pengutronix Kernel Team" <kernel@pengutronix.de>,
	"Maxime Coquelin" <mcoquelin.stm32@gmail.com>,
	"Alexandre Torgue" <alexandre.torgue@foss.st.com>,
	"Robert Richter" <rric@kernel.org>,
	"Nobuhiro Iwamatsu" <nobuhiro1.iwamatsu@toshiba.co.jp>,
	"Ray Jui" <rjui@broadcom.com>,
	"Scott Branden" <sbranden@broadcom.com>,
	"Broadcom internal kernel review list"
	<bcm-kernel-feedback-list@broadcom.com>,
	"Shubhrajyoti Datta" <shubhrajyoti.datta@xilinx.com>,
	"Srinivas Neeli" <srinivas.neeli@xilinx.com>,
	"Michal Simek" <michal.simek@xilinx.com>
Cc: linux-arm-kernel@lists.infradead.org,
	linux-unisoc@lists.infradead.org, linux-kernel@vger.kernel.org,
	linux-stm32@st-md-mailman.stormreply.com,
	Linus Walleij <linus.walleij@linaro.org>,
	Marc Zyngier <maz@kernel.org>
Subject: [PATCH 4/9] gpio: thunderx: Convert to immutable irq_chip
Date: Mon, 20 Mar 2023 10:55:11 +0100	[thread overview]
Message-ID: <20230316-immutable-chips-2-v1-4-053d6ede831b@linaro.org> (raw)
In-Reply-To: <20230316-immutable-chips-2-v1-0-053d6ede831b@linaro.org>

Convert the driver to immutable irq-chip with a bit of
intuition.

Whereas in most cases we put the gpiochip_[enable|disable]_irq()
calls in the .irq_mask() and .irq_unmask() callbacks, here
we need to put them in the .irq_enable() and .irq_disable()
callbacks, as this driver uses both .irq_mask() and
.irq_mask_ack().

Cc: Marc Zyngier <maz@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/gpio/gpio-thunderx.c | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/drivers/gpio/gpio-thunderx.c b/drivers/gpio/gpio-thunderx.c
index cc62c6e64103..8521c6aacace 100644
--- a/drivers/gpio/gpio-thunderx.c
+++ b/drivers/gpio/gpio-thunderx.c
@@ -354,16 +354,22 @@ static int thunderx_gpio_irq_set_type(struct irq_data *d,
 	return IRQ_SET_MASK_OK;
 }
 
-static void thunderx_gpio_irq_enable(struct irq_data *data)
+static void thunderx_gpio_irq_enable(struct irq_data *d)
 {
-	irq_chip_enable_parent(data);
-	thunderx_gpio_irq_unmask(data);
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+	gpiochip_enable_irq(gc, irqd_to_hwirq(d));
+	irq_chip_enable_parent(d);
+	thunderx_gpio_irq_unmask(d);
 }
 
-static void thunderx_gpio_irq_disable(struct irq_data *data)
+static void thunderx_gpio_irq_disable(struct irq_data *d)
 {
-	thunderx_gpio_irq_mask(data);
-	irq_chip_disable_parent(data);
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+	thunderx_gpio_irq_mask(d);
+	irq_chip_disable_parent(d);
+	gpiochip_disable_irq(gc, irqd_to_hwirq(d));
 }
 
 /*
@@ -372,7 +378,7 @@ static void thunderx_gpio_irq_disable(struct irq_data *data)
  * semantics and other acknowledgment tasks associated with the GPIO
  * mechanism.
  */
-static struct irq_chip thunderx_gpio_irq_chip = {
+static const struct irq_chip thunderx_gpio_irq_chip = {
 	.name			= "GPIO",
 	.irq_enable		= thunderx_gpio_irq_enable,
 	.irq_disable		= thunderx_gpio_irq_disable,
@@ -383,8 +389,8 @@ static struct irq_chip thunderx_gpio_irq_chip = {
 	.irq_eoi		= irq_chip_eoi_parent,
 	.irq_set_affinity	= irq_chip_set_affinity_parent,
 	.irq_set_type		= thunderx_gpio_irq_set_type,
-
-	.flags			= IRQCHIP_SET_TYPE_MASKED
+	.flags			= IRQCHIP_SET_TYPE_MASKED | IRQCHIP_IMMUTABLE,
+	GPIOCHIP_IRQ_RESOURCE_HELPERS,
 };
 
 static int thunderx_gpio_child_to_parent_hwirq(struct gpio_chip *gc,
@@ -526,7 +532,7 @@ static int thunderx_gpio_probe(struct pci_dev *pdev,
 	chip->set_multiple = thunderx_gpio_set_multiple;
 	chip->set_config = thunderx_gpio_set_config;
 	girq = &chip->irq;
-	girq->chip = &thunderx_gpio_irq_chip;
+	gpio_irq_chip_set_chip(girq, &thunderx_gpio_irq_chip);
 	girq->fwnode = of_node_to_fwnode(dev->of_node);
 	girq->parent_domain =
 		irq_get_irq_data(txgpio->msix_entries[0].vector)->domain;

-- 
2.34.1

