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SubjectRe: [PATCH RFT v2] regulator: ab8500: Update info->update_val only when successfully update register
On 03/28/2013 10:23 AM, Axel Lin wrote:
> Don't update info->update_val if write to the register fails.
>
> Signed-off-by: Axel Lin <axel.lin@ingics.com>
> ---
> v2:
> On the second thought, I think it's ok to update info->update_val when
> regulator is disabled, the mode will change when the regulator is enabled.
That is better of course. I did not notice before.
> Hi Bengt,
> I just got your Ack for v1.
> Can you review this v2 again, and let Mark know which version do you prefer.
>
> Thanks.
> Axel
I prefer this v2, thanks.

Acked-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
> drivers/regulator/ab8500.c | 27 +++++++++++++++++++--------
> 1 file changed, 19 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c
> index 12e2740..7814ac3 100644
> --- a/drivers/regulator/ab8500.c
> +++ b/drivers/regulator/ab8500.c
> @@ -182,8 +182,8 @@ static unsigned int ab8500_regulator_get_optimum_mode(
> static int ab8500_regulator_set_mode(struct regulator_dev *rdev,
> unsigned int mode)
> {
> - int ret = 0;
> -
> + int ret;
> + u8 update_val;
> struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
>
> if (info == NULL) {
> @@ -193,31 +193,42 @@ static int ab8500_regulator_set_mode(struct regulator_dev *rdev,
>
> switch (mode) {
> case REGULATOR_MODE_NORMAL:
> - info->update_val = info->update_val_normal;
> + update_val = info->update_val_normal;
> break;
> case REGULATOR_MODE_IDLE:
> - info->update_val = info->update_val_idle;
> + update_val = info->update_val_idle;
> break;
> default:
> return -EINVAL;
> }
>
> + /* ab8500 regulators share mode and enable in the same register bits.
> + off = 0b00
> + low power mode= 0b11
> + full powermode = 0b01
> + (HW control mode = 0b10)
> + Thus we don't write to the register when regulator is disabled.
> + */
> if (info->is_enabled) {
> ret = abx500_mask_and_set_register_interruptible(info->dev,
> info->update_bank, info->update_reg,
> - info->update_mask, info->update_val);
> - if (ret < 0)
> + info->update_mask, update_val);
> + if (ret < 0) {
> dev_err(rdev_get_dev(rdev),
> "couldn't set regulator mode\n");
> + return ret;
> + }
>
> dev_vdbg(rdev_get_dev(rdev),
> "%s-set_mode (bank, reg, mask, value): "
> "0x%x, 0x%x, 0x%x, 0x%x\n",
> info->desc.name, info->update_bank, info->update_reg,
> - info->update_mask, info->update_val);
> + info->update_mask, update_val);
> }
>
> - return ret;
> + info->update_val = update_val;
> +
> + return 0;
> }
>
> static unsigned int ab8500_regulator_get_mode(struct regulator_dev *rdev)



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