Re: [PATCH] phy: qualcomm: phy-qcom-eusb2-repeater: Fix SMB Power leakage issue

[Krishna Kurapati <krishna.kurapati@oss.qualcomm.com>]

On 10/12/2026 9:20 PM, Manivannan Sadhasivam wrote:
> On Thu, Sep 17, 2026 at 03:10:09PM +0530, Krishna Kurapati wrote:
>> On Glymur, it is observed that although the exit call is done, there is a
>> power leakage seen on SMB2370 charger (which embeds the eUSB2 module as
>> well). As per recommendation of HW team, disable the repeater during the
>> exit call to prevent this power leakage.
>>
>> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
>> Signed-off-by: Krishna Kurapati <krishna.kurapati@oss.qualcomm.com>
>> ---
>> RB tag from Konrad received on an internal reivew.
>> ---
>>   drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c | 3 +++
>>   1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
>> index efeec4709a15..7db2fbff6163 100644
>> --- a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
>> +++ b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
>> @@ -229,7 +229,10 @@ static int eusb2_repeater_set_mode(struct phy *phy,
>>   static int eusb2_repeater_exit(struct phy *phy)
>>   {
>>   	struct eusb2_repeater *rptr = phy_get_drvdata(phy);
>> +	struct regmap *regmap = rptr->regmap;
>> +	u32 base = rptr->base;
>>   
>> +	regmap_write(regmap, base + EUSB2_EN_CTL1, 0);
> 
> Can you safely write 0 to this register? Since init() just sets EUSB2_RPTR_EN,
> wondering if you need to clear that bit only.
> 
As per the HW spec, only one bit is exposed and the reset value of this 
register is 0x00. So writing 0x00 to this register is valid.

Regards,
Krishna,