linux-kernel - [PATCH AUTOSEL 6.1 05/26] gpiolib: of: add a quirk for reset line for Marvell NFC controller

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Date:   Fri, 23 Dec 2022 20:29:09 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Sasha Levin <sashal@...nel.org>, linus.walleij@...aro.org,
        brgl@...ev.pl, linux-gpio@...r.kernel.org
Subject: [PATCH AUTOSEL 6.1 05/26] gpiolib: of: add a quirk for reset line for Marvell NFC controller

From: Dmitry Torokhov <dmitry.torokhov@...il.com>

[ Upstream commit 9c2cc7171e08eef52110d272fdf2225d6dcd81b6 ]

The controller is using non-standard "reset-n-io" name for its reset
gpio property, whereas gpiod API expects "<name>-gpios". Add a quirk
so that gpiod API will still work on unmodified DTSes.

Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpio/gpiolib-of.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 2b5d1b3095c7..a9cedc39a245 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -390,6 +390,16 @@ static struct gpio_desc *of_find_gpio_rename(struct device_node *np,
 #if IS_ENABLED(CONFIG_MFD_ARIZONA)
 		{ "wlf,reset",	NULL,		NULL },
 #endif
+#if IS_ENABLED(CONFIG_NFC_MRVL_I2C)
+		{ "reset",	"reset-n-io",	"marvell,nfc-i2c" },
+#endif
+#if IS_ENABLED(CONFIG_NFC_MRVL_SPI)
+		{ "reset",	"reset-n-io",	"marvell,nfc-spi" },
+#endif
+#if IS_ENABLED(CONFIG_NFC_MRVL_UART)
+		{ "reset",	"reset-n-io",	"marvell,nfc-uart" },
+		{ "reset",	"reset-n-io",	"mrvl,nfc-uart" },
+#endif
 #if !IS_ENABLED(CONFIG_PCI_LANTIQ)
 		/* MIPS Lantiq PCI */
 		{ "reset",	"gpios-reset",	"lantiq,pci-xway" },
-- 
2.35.1