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i2c: uniphier-f: correct error recovery

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The uniphier i2c block can recognize some handshake errors.
But driver handles all error detections as no error if no timeout.
So this makes unrecoverable state.

This replaces the return values with the right ones to tell the i2c
framework the errors:
- EDEADLK for arbitration lost error
- ENODATA for no answer error

Signed-off-by: Dai Okamura <okamura.dai@socionext.com>
Acked-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Dai Okamura 2022-12-09 20:38:27 +09:00 committed by Tom Rini
parent f8548ce0e0
commit 4671435c54
1 changed files with 2 additions and 2 deletions
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4
drivers/i2c/i2c-uniphier-f.c
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@ -130,12 +130,12 @@ static int wait_for_irq(struct uniphier_fi2c_priv *priv, u32 flags,
if (irq & I2C_INT_AL) { if (irq & I2C_INT_AL) {
dev_dbg(priv->dev, "error: arbitration lost\n"); dev_dbg(priv->dev, "error: arbitration lost\n");
*stop = false; *stop = false;
return ret; return -EDEADLK;
} }
if (irq & I2C_INT_NA) { if (irq & I2C_INT_NA) {
dev_dbg(priv->dev, "error: no answer\n"); dev_dbg(priv->dev, "error: no answer\n");
return ret; return -ENODATA;
} }
return 0; return 0;