linux-kernel - [PATCH 3/6] pinctrl: plgpio: Convert to immutable irq

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Message-Id: <20230414-immutable-irqchips-2-v1-3-6b59a5186b00@linaro.org>
Date:   Fri, 14 Apr 2023 16:06:19 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Marc Zyngier <maz@...nel.org>, Viresh Kumar <vireshk@...nel.org>,
        Shiraz Hashim <shiraz.linux.kernel@...il.com>, soc@...nel.org,
        Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 3/6] pinctrl: plgpio: Convert to immutable irq_chip

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

Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
 drivers/pinctrl/spear/pinctrl-plgpio.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/spear/pinctrl-plgpio.c b/drivers/pinctrl/spear/pinctrl-plgpio.c
index ada401ef4342..722681e0b89b 100644
--- a/drivers/pinctrl/spear/pinctrl-plgpio.c
+++ b/drivers/pinctrl/spear/pinctrl-plgpio.c
@@ -301,6 +301,7 @@ static void plgpio_irq_disable(struct irq_data *d)
 	spin_lock_irqsave(&plgpio->lock, flags);
 	plgpio_reg_set(plgpio->regmap, offset, plgpio->regs.ie);
 	spin_unlock_irqrestore(&plgpio->lock, flags);
+	gpiochip_disable_irq(gc, irqd_to_hwirq(d));
 }
 
 static void plgpio_irq_enable(struct irq_data *d)
@@ -317,6 +318,7 @@ static void plgpio_irq_enable(struct irq_data *d)
 			return;
 	}
 
+	gpiochip_enable_irq(gc, irqd_to_hwirq(d));
 	spin_lock_irqsave(&plgpio->lock, flags);
 	plgpio_reg_reset(plgpio->regmap, offset, plgpio->regs.ie);
 	spin_unlock_irqrestore(&plgpio->lock, flags);
@@ -356,11 +358,13 @@ static int plgpio_irq_set_type(struct irq_data *d, unsigned trigger)
 	return 0;
 }
 
-static struct irq_chip plgpio_irqchip = {
+static const struct irq_chip plgpio_irqchip = {
 	.name		= "PLGPIO",
 	.irq_enable	= plgpio_irq_enable,
 	.irq_disable	= plgpio_irq_disable,
 	.irq_set_type	= plgpio_irq_set_type,
+	.flags		= IRQCHIP_IMMUTABLE,
+	GPIOCHIP_IRQ_RESOURCE_HELPERS,
 };
 
 static void plgpio_irq_handler(struct irq_desc *desc)
@@ -595,7 +599,7 @@ static int plgpio_probe(struct platform_device *pdev)
 		struct gpio_irq_chip *girq;
 
 		girq = &plgpio->chip.irq;
-		girq->chip = &plgpio_irqchip;
+		gpio_irq_chip_set_chip(girq, &plgpio_irqchip);
 		girq->parent_handler = plgpio_irq_handler;
 		girq->num_parents = 1;
 		girq->parents = devm_kcalloc(&pdev->dev, 1,

-- 
2.34.1