[PATCH 1/2] DO NOT MERGE: mmc: dw_mmc: Keep vqmmc-supply enable count in balance

[Kever Yang]

On 2023/7/2 20:41, Jonas Karlman wrote:
> With the series "regulator: implement basic reference counter" [1],
> keeping regulator enablement in balance become more important.
>
> Disable vqmmc-supply before signal voltage is changed to keep regulator
> enable counter in balance.
>
> [1] https://patchwork.ozlabs.org/project/uboot/list/?series=351536
>
> Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Thanks,
- Kever
> ---
>   drivers/mmc/dw_mmc.c | 4 ++++
>   1 file changed, 4 insertions(+)
>
> diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
> index 5085a3b491da..400066fa99a2 100644
> --- a/drivers/mmc/dw_mmc.c
> +++ b/drivers/mmc/dw_mmc.c
> @@ -509,6 +509,10 @@ static int dwmci_set_ios(struct mmc *mmc)
>   	if (mmc->vqmmc_supply) {
>   		int ret;
>   
> +		ret = regulator_set_enable_if_allowed(mmc->vqmmc_supply, false);
> +		if (ret)
> +			return ret;
> +
>   		if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
>   			regulator_set_value(mmc->vqmmc_supply, 1800000);
>   		else