From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Mon, 17 Aug 2020 07:00:05 +0000 (+0200)
Subject: extcon: ptn5150: Make 'vbus-gpios' optional
X-Git-Tag: v5.15~2672^2~35^2~16
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fbaf3b67d4d27648daebf31cccd36eee8e26528b;p=platform%2Fkernel%2Flinux-starfive.git

extcon: ptn5150: Make 'vbus-gpios' optional

The PTN5150 chip can be used in hardware designs with only reporting of
USB Type-C connection, without the VBUS control.  The driver however
unconditionally expected 'vbus-gpios'.

Since all uses of the VBUS GPIO descriptor are NULL safe, the code can
accept missing GPIO and provide only extcon status reporting.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Vijai Kumar K <vijaikumar.kanagarajan@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---

diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c
index 342973726565..008e664d8d56 100644
--- a/drivers/extcon/extcon-ptn5150.c
+++ b/drivers/extcon/extcon-ptn5150.c
@@ -238,8 +238,14 @@ static int ptn5150_i2c_probe(struct i2c_client *i2c,
 	info->i2c = i2c;
 	info->vbus_gpiod = devm_gpiod_get(&i2c->dev, "vbus", GPIOD_OUT_LOW);
 	if (IS_ERR(info->vbus_gpiod)) {
-		dev_err(dev, "failed to get VBUS GPIO\n");
-		return PTR_ERR(info->vbus_gpiod);
+		ret = PTR_ERR(info->vbus_gpiod);
+		if (ret == -ENOENT) {
+			dev_info(dev, "No VBUS GPIO, ignoring VBUS control\n");
+			info->vbus_gpiod = NULL;
+		} else {
+			dev_err(dev, "failed to get VBUS GPIO\n");
+			return ret;
+		}
 	}
 
 	mutex_init(&info->mutex);