mfd: Fix checking bit_mask for adp5520_set_bits

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

---
Hi Samuel,
I found this serial of patches are not merged yet.
( although you replied that you applied all 3 patches in the mail ) It was post on https://lkml.org/lkml/2011/10/30/137
So I resend it again.

Thanks,
Axel

 drivers/mfd/adp5520.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

index f1d8848..8d816cc 100644
@@ -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);
 	}

1.7.5.4

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.

---
 drivers/mfd/da903x.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

index 62ce685..1924b85 100644
@@ -182,7 +182,7 @@ int da903x_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 = __da903x_write(chip->client, reg, reg_val);
 	}

1.7.5.4

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.

---
 drivers/mfd/tps6586x.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

index bba26d9..a5ddf31 100644
@@ -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);
 	}

1.7.5.4

2011/12/19 Axel Lin <[email protected]>:

Hi Samuel,
I found these patches already in your for-linus branch.
But it is strange that these patches are not exist in linux-next tree.

Regards,
Axel

Hi Axel,

Strange as in I forgot to cherry pick them. It should be fixed now, sorry.

Cheers,
Samuel.

Intel Open Source Technology Centre
http://oss.intel.com/