From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Sat, 17 Feb 2018 22:58:43 +0200
Subject: i2c: designware: Consider SCL GPIO optional
Git-commit: d1fa74520dcdbeae891b30035e6c51aafa35306d
Patch-mainline: v4.16-rc3
References: fate#326530,fate#326531,fate#326535,fate#326538,fate#326539
GPIO library can return -ENOSYS for the failed request.
Instead of failing ->probe() in this case override error code to 0.
Fixes: ca382f5b38f3 ("i2c: designware: add i2c gpio recovery option")
Reported-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
drivers/i2c/busses/i2c-designware-master.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c
index 55926ef41ef1..05732531829f 100644
--- 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;
}
--
2.11.0