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authorFlorian Vaussard <florian.vaussard@epfl.ch>2014-02-25 14:28:19 +0100
committerLee Jones <lee.jones@linaro.org>2014-03-19 08:58:27 +0000
commit89d68998308e16c49ce18b402d5f702d5a1767e5 (patch)
treeefac6e0183b12c6c9bac78755eae15746a9496e5 /drivers/mfd
parentf8935e1cfcccd4904ee1bd1420aa781d43175479 (diff)
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op-kernel-dev-89d68998308e16c49ce18b402d5f702d5a1767e5.tar.gz
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>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/twl6040.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
index f15114f..6e88f25 100644
--- a/drivers/mfd/twl6040.c
+++ b/drivers/mfd/twl6040.c
@@ -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)
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