From:   Linus Walleij <linus.walleij@linaro.org>
Date:   Thu, 16 Feb 2023 10:37:07 +0100
Subject: [PATCH 06/17] gpio: cadence: Convert to immutable irq_chip
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Message-Id: <20230215-immutable-chips-v1-6-51a8f224a5d0@linaro.org>
References: <20230215-immutable-chips-v1-0-51a8f224a5d0@linaro.org>
In-Reply-To: <20230215-immutable-chips-v1-0-51a8f224a5d0@linaro.org>
To:     Mun Yew Tham <mun.yew.tham@intel.com>,
        Bartosz Golaszewski <brgl@bgdev.pl>,
        Joel Stanley <joel@jms.id.au>,
        Andrew Jeffery <andrew@aj.id.au>, Alban Bedel <albeu@free.fr>,
        Orson Zhai <orsonzhai@gmail.com>,
        Baolin Wang <baolin.wang@linux.alibaba.com>,
        Chunyan Zhang <zhang.lyra@gmail.com>,
        Jay Fang <f.fangjian@huawei.com>,
        Daniel Palmer <daniel@thingy.jp>,
        Romain Perier <romain.perier@gmail.com>,
        Grygorii Strashko <grygorii.strashko@ti.com>,
        Santosh Shilimkar <ssantosh@kernel.org>,
        Kevin Hilman <khilman@kernel.org>,
        William Breathitt Gray <william.gray@linaro.org>
Cc:     linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-aspeed@lists.ozlabs.org, linux-omap@vger.kernel.org,
        Linus Walleij <linus.walleij@linaro.org>,
        Marc Zyngier <maz@kernel.org>
Precedence: bulk

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

Cc: Marc Zyngier <maz@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/gpio/gpio-cadence.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpio-cadence.c b/drivers/gpio/gpio-cadence.c
index 137aea49ba02..3720b90cad10 100644
--- a/drivers/gpio/gpio-cadence.c
+++ b/drivers/gpio/gpio-cadence.c
@@ -70,6 +70,7 @@ static void cdns_gpio_irq_mask(struct irq_data *d)
 	struct cdns_gpio_chip *cgpio = gpiochip_get_data(chip);
 
 	iowrite32(BIT(d->hwirq), cgpio->regs + CDNS_GPIO_IRQ_DIS);
+	gpiochip_disable_irq(chip, irqd_to_hwirq(d));
 }
 
 static void cdns_gpio_irq_unmask(struct irq_data *d)
@@ -77,6 +78,7 @@ static void cdns_gpio_irq_unmask(struct irq_data *d)
 	struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
 	struct cdns_gpio_chip *cgpio = gpiochip_get_data(chip);
 
+	gpiochip_enable_irq(chip, irqd_to_hwirq(d));
 	iowrite32(BIT(d->hwirq), cgpio->regs + CDNS_GPIO_IRQ_EN);
 }
 
@@ -138,11 +140,13 @@ static void cdns_gpio_irq_handler(struct irq_desc *desc)
 	chained_irq_exit(irqchip, desc);
 }
 
-static struct irq_chip cdns_gpio_irqchip = {
+static const struct irq_chip cdns_gpio_irqchip = {
 	.name		= "cdns-gpio",
 	.irq_mask	= cdns_gpio_irq_mask,
 	.irq_unmask	= cdns_gpio_irq_unmask,
-	.irq_set_type	= cdns_gpio_irq_set_type
+	.irq_set_type	= cdns_gpio_irq_set_type,
+	.flags		= IRQCHIP_IMMUTABLE,
+	GPIOCHIP_IRQ_RESOURCE_HELPERS,
 };
 
 static int cdns_gpio_probe(struct platform_device *pdev)
@@ -222,7 +226,7 @@ static int cdns_gpio_probe(struct platform_device *pdev)
 		struct gpio_irq_chip *girq;
 
 		girq = &cgpio->gc.irq;
-		girq->chip = &cdns_gpio_irqchip;
+		gpio_irq_chip_set_chip(girq, &cdns_gpio_irqchip);
 		girq->parent_handler = cdns_gpio_irq_handler;
 		girq->num_parents = 1;
 		girq->parents = devm_kcalloc(&pdev->dev, 1,

-- 
2.34.1