i2c: designware: Consider SCL GPIO optional

GPIO library can return -ENOSYS for the failed request. Instead of failing ->probe() in this case override error code to 0. Fixes: ca382f5 ("i2c: designware: add i2c gpio recovery option") Reported-by: Dominik Brodowski <[email protected]> Signed-off-by: Andy Shevchenko <[email protected]> Tested-by: Dominik Brodowski <[email protected]> Signed-off-by: Wolfram Sang <[email protected]>
LoveHeat · Feb 22, 2018 · d1fa745 · d1fa745
1 parent c396b9a
commit d1fa745
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c
@@ -644,7 +644,7 @@ static int i2c_dw_init_recovery_info(struct dw_i2c_dev *dev)
 	gpio = devm_gpiod_get(dev->dev, "scl", GPIOD_OUT_HIGH);
 	if (IS_ERR(gpio)) {
 		r = PTR_ERR(gpio);
-		if (r == -ENOENT)
+		if (r == -ENOENT || r == -ENOSYS)
 			return 0;
 		return r;
 	}