linux-kernel - [PATCH] pinctrl: renesas: rzg2l: Always call rzg2l_gpio

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Message-ID: <20241003131642.472298-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Thu,  3 Oct 2024 14:16:41 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Linus Walleij <linus.walleij@...aro.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>
Cc: linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH] pinctrl: renesas: rzg2l: Always call rzg2l_gpio_request() for interrupt pins

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Ensure that rzg2l_gpio_request() is called for GPIO pins configured as
interrupts, regardless of whether they are muxed in u-boot. This
guarantees that the pinctrl core is aware of the GPIO pin usage via
pinctrl_gpio_request(), which is invoked through rzg2l_gpio_request().

Fixes: 2fd4fe19d0150 ("pinctrl: renesas: rzg2l: Configure interrupt input mode")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
Output before this patch on G2L/SMARC:
root@...rc-rzg2l:~# cat /sys/kernel/debug/pinctrl/11030000.pinctrl-pinctrl-rzg2l/pinmux-pins | grep P2_1
pin 17 (P2_1): UNCLAIMED

Output after this patch G2L/SMARC:
root@...rc-rzg2l:~# cat /sys/kernel/debug/pinctrl/11030000.pinctrl-pinctrl-rzg2l/pinmux-pins | grep P2_1
pin 17 (P2_1): GPIO 11030000.pinctrl:529
---
 drivers/pinctrl/renesas/pinctrl-rzg2l.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 60ef20ca3ccf..1dceaf8290ea 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -2368,20 +2368,11 @@ static const struct irq_chip rzg2l_gpio_irqchip = {
 
 static int rzg2l_gpio_interrupt_input_mode(struct gpio_chip *chip, unsigned int offset)
 {
-	struct rzg2l_pinctrl *pctrl = gpiochip_get_data(chip);
-	const struct pinctrl_pin_desc *pin_desc = &pctrl->desc.pins[offset];
-	u64 *pin_data = pin_desc->drv_data;
-	u32 off = RZG2L_PIN_CFG_TO_PORT_OFFSET(*pin_data);
-	u8 bit = RZG2L_PIN_ID_TO_PIN(offset);
-	u8 reg8;
 	int ret;
 
-	reg8 = readb(pctrl->base + PMC(off));
-	if (reg8 & BIT(bit)) {
-		ret = rzg2l_gpio_request(chip, offset);
-		if (ret)
-			return ret;
-	}
+	ret = rzg2l_gpio_request(chip, offset);
+	if (ret)
+		return ret;
 
 	return rzg2l_gpio_direction_input(chip, offset);
 }
-- 
2.43.0