[PATCH] regulator: lp8755: Fix mask for pchip->mphase

[PATCH] regulator: lp8755: Fix mask for pchip->mphase

[Axel Lin]

According to lp8755.h:
enum lp8755_mphase_config {
        MPHASE_CONF0,
        MPHASE_CONF1,
        MPHASE_CONF2,
        MPHASE_CONF3,
        MPHASE_CONF4,
        MPHASE_CONF5,
        MPHASE_CONF6,
        MPHASE_CONF7,
        MPHASE_CONF8,
        MPHASE_CONF_MAX
};

MPHASE_CONF_MAX is 9, the mask for pchip->mphase should be 0x17.
Otherwise, we cannot differentiate MPHASE_CONF0 and MPHASE_CONF8.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
---
Hi Daniel,
I don't have the datasheet, can you check if this patch is correct?

BTW, I'm Axel, not Alex.

Regards,
Axel
 drivers/regulator/lp8755.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/lp8755.c b/drivers/regulator/lp8755.c
index 06a82e2..6d5a11d 100644
--- a/drivers/regulator/lp8755.c
+++ b/drivers/regulator/lp8755.c
@@ -301,7 +301,7 @@ static int lp8755_init_data(struct lp8755_chip *pchip)
 	ret = lp8755_read(pchip, 0x3D, &regval);
 	if (ret < 0)
 		goto out_i2c_error;
-	pchip->mphase = regval & 0x07;
+	pchip->mphase = regval & 0x17;
 
 	/* set default data based on multi-phase config */
 	for (icnt = 0; icnt < mphase_buck[pchip->mphase].nreg; icnt++) {
-- 
1.7.9.5

Re: [PATCH] regulator: lp8755: Fix mask for pchip->mphase

[gshark]

2012년 12월 26일 11:12, Axel Lin 쓴 글:
> According to lp8755.h:
> enum lp8755_mphase_config {
>          MPHASE_CONF0,
>          MPHASE_CONF1,
>          MPHASE_CONF2,
>          MPHASE_CONF3,
>          MPHASE_CONF4,
>          MPHASE_CONF5,
>          MPHASE_CONF6,
>          MPHASE_CONF7,
>          MPHASE_CONF8,
>          MPHASE_CONF_MAX
> };
>
> MPHASE_CONF_MAX is 9, the mask for pchip->mphase should be 0x17.
> Otherwise, we cannot differentiate MPHASE_CONF0 and MPHASE_CONF8.
>
> Signed-off-by: Axel Lin <axel.lin@ingics.com>
> ---
> Hi Daniel,
> I don't have the datasheet, can you check if this patch is correct?
>
> BTW, I'm Axel, not Alex.
>
> Regards,
> Axel
>   drivers/regulator/lp8755.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/regulator/lp8755.c b/drivers/regulator/lp8755.c
> index 06a82e2..6d5a11d 100644
> --- a/drivers/regulator/lp8755.c
> +++ b/drivers/regulator/lp8755.c
> @@ -301,7 +301,7 @@ static int lp8755_init_data(struct lp8755_chip *pchip)
>   	ret = lp8755_read(pchip, 0x3D, &regval);
>   	if (ret < 0)
>   		goto out_i2c_error;
> -	pchip->mphase = regval & 0x07;
> +	pchip->mphase = regval & 0x17;
>   
>   	/* set default data based on multi-phase config */
>   	for (icnt = 0; icnt < mphase_buck[pchip->mphase].nreg; icnt++) {
Hi Axel.


According to the new datasheet, it has 9 multi-phase mode from 0 to 8 
and it takes 4bits in the register.

the mask for pchip->mphase should be 0x0F.

Thank you for your comments Axel.