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mfd: twl6040: Check for error when reading revision register 

We may have an error when reading the revision register, so check for
the returned value.

Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Florian Vaussard 2014-02-25 14:28:19 +01:00 committed by Lee Jones
parent f8935e1cfc
commit 89d6899830
1 changed files with 5 additions and 0 deletions
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5
drivers/mfd/twl6040.c
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@ -661,6 +661,11 @@ static int twl6040_probe(struct i2c_client *client,
init_completion(&twl6040->ready);
twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
if (twl6040->rev < 0) {
dev_err(&client->dev, "Failed to read revision register: %d\n",
twl6040->rev);
goto gpio_err;
}
/* ERRATA: Automatic power-up is not possible in ES1.0 */
if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)