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mfd: Set adp5520 bits if new value is different from the old one

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Current code checks if all the bit_mask bits are all zero is wrong.
We need to write new value if the bit mask fields of new value is
not equal to old value.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Axel Lin 2011-10-31 11:00:06 +08:00 committed by Samuel Ortiz
parent 9ad33ba51a
commit 890c98e374
1 changed files with 1 additions and 1 deletions
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2
drivers/mfd/adp5520.c
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@ -109,7 +109,7 @@ int adp5520_set_bits(struct device *dev, int reg, uint8_t bit_mask)
ret = __adp5520_read(chip->client, reg, &reg_val);
if (!ret && ((reg_val & bit_mask) == 0)) {
if (!ret && ((reg_val & bit_mask) != bit_mask)) {
reg_val |= bit_mask;
ret = __adp5520_write(chip->client, reg, reg_val);
}