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mfd: Set tps6586x bits if new value is different from the old one

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It does not make sense to write new value only when all the bit_mask
bits are zero.
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>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Axel Lin 2011-10-31 14:24:30 +08:00 committed by Samuel Ortiz
parent af65e6cef4
commit 26bc4e0cc5
1 changed files with 1 additions and 1 deletions
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2
drivers/mfd/tps6586x.c
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@ -197,7 +197,7 @@ int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
if (ret)
goto out;
if ((reg_val & bit_mask) == 0) {
if ((reg_val & bit_mask) != bit_mask) {
reg_val |= bit_mask;
ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
}