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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: ca382f5b38 ("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>
This commit is contained in:
Andy Shevchenko 2018-02-17 22:58:43 +02:00 committed by Wolfram Sang
parent c396b9a03e
commit d1fa74520d
1 changed files with 1 additions and 1 deletions
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2
drivers/i2c/busses/i2c-designware-master.c
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@ -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;
}