From 26bc4e0cc5426e86398d6780d160f02c0a347087 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Mon, 31 Oct 2011 14:24:30 +0800 Subject: [PATCH] mfd: Set tps6586x bits if new value is different from the old one 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 Signed-off-by: Samuel Ortiz --- drivers/mfd/tps6586x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c index bba26d96c240..a5ddf31b60ca 100644 --- a/drivers/mfd/tps6586x.c +++ b/drivers/mfd/tps6586x.c @@ -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); }