Patch "gpiolib: of: add a quirk for legacy names in Mediatek mt2701-cs42448" has been added to the 6.1-stable tree

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This is a note to let you know that I've just added the patch titled

    gpiolib: of: add a quirk for legacy names in Mediatek mt2701-cs42448

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     gpiolib-of-add-a-quirk-for-legacy-names-in-mediatek-.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit c98cd1a155be79deff08d6d3cb364a6ad9a95a19
Author: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Date:   Mon Oct 17 22:41:02 2022 -0700

    gpiolib: of: add a quirk for legacy names in Mediatek mt2701-cs42448
    
    [ Upstream commit 326c3753a6358ffab607749ea0aa95d1d0ad79b0 ]
    
    The driver is using non-standard "i2s1-in-sel-gpio1" and
    "i2s1-in-sel-gpio2" names to describe its gpios. In preparation to
    converting to the standard naming (i2s1-in-sel-gpios) and switching the
    driver to gpiod API add a quirk to gpiolib to keep compatibility with
    existing DTSes.
    
    Reviewed-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
    Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
    Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
    Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
    Stable-dep-of: f8d76c2c313c ("gpiolib: of: add polarity quirk for TSC2005")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 0e4e1291604d6..cef4f66341256 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -488,6 +488,38 @@ static struct gpio_desc *of_find_usb_gpio(struct device_node *np,
 	return of_get_named_gpiod_flags(np, con_id, idx, of_flags);
 }
 
+static struct gpio_desc *of_find_mt2701_gpio(struct device_node *np,
+					     const char *con_id,
+					     unsigned int idx,
+					     enum of_gpio_flags *of_flags)
+{
+	struct gpio_desc *desc;
+	const char *legacy_id;
+
+	if (!IS_ENABLED(CONFIG_SND_SOC_MT2701_CS42448))
+		return ERR_PTR(-ENOENT);
+
+	if (!of_device_is_compatible(np, "mediatek,mt2701-cs42448-machine"))
+		return ERR_PTR(-ENOENT);
+
+	if (!con_id || strcmp(con_id, "i2s1-in-sel"))
+		return ERR_PTR(-ENOENT);
+
+	if (idx == 0)
+		legacy_id = "i2s1-in-sel-gpio1";
+	else if (idx == 1)
+		legacy_id = "i2s1-in-sel-gpio2";
+	else
+		return ERR_PTR(-ENOENT);
+
+	desc = of_get_named_gpiod_flags(np, legacy_id, 0, of_flags);
+	if (!gpiod_not_found(desc))
+		pr_info("%s is using legacy gpio name '%s' instead of '%s-gpios'\n",
+			of_node_full_name(np), legacy_id, con_id);
+
+	return desc;
+}
+
 typedef struct gpio_desc *(*of_find_gpio_quirk)(struct device_node *np,
 						const char *con_id,
 						unsigned int idx,
@@ -498,6 +530,7 @@ static const of_find_gpio_quirk of_find_gpio_quirks[] = {
 	of_find_regulator_gpio,
 	of_find_arizona_gpio,
 	of_find_usb_gpio,
+	of_find_mt2701_gpio,
 	NULL
 };
 




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