On 21/08/17 21:02, Zhoujie Wu wrote:
> Xenon sdh controller requests proper SD bus voltage select
> bits programmed even with vmmc power supply. Any reserved
> value(100b-000b) programmed in this field will lead to controller
> ignore SD bus power bit and keep its value at zero.
> Add set_power callback to handle this.
>
> Signed-off-by: Zhoujie Wu <zjwu@xxxxxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> Updated according to Jisheng Zhang's comment.
> drivers/mmc/host/sdhci-xenon.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-xenon.c b/drivers/mmc/host/sdhci-xenon.c
> index edd4d915..a4be2fd 100644
> --- a/drivers/mmc/host/sdhci-xenon.c
> +++ b/drivers/mmc/host/sdhci-xenon.c
> @@ -210,8 +210,27 @@ static void xenon_set_uhs_signaling(struct sdhci_host *host,
> sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
> }
>
> +static void xenon_set_power(struct sdhci_host *host, unsigned char mode,
> + unsigned short vdd)
> +{
> + struct mmc_host *mmc = host->mmc;
> + u8 pwr = host->pwr;
> +
> + sdhci_set_power_noreg(host, mode, vdd);
> +
> + if (host->pwr == pwr)
> + return;
> +
> + if (host->pwr == 0)
> + vdd = 0;
> +
> + if (!IS_ERR(mmc->supply.vmmc))
> + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
> +}
> +
> static const struct sdhci_ops sdhci_xenon_ops = {
> .set_clock = sdhci_set_clock,
> + .set_power = xenon_set_power,
> .set_bus_width = sdhci_set_bus_width,
> .reset = xenon_reset,
> .set_uhs_signaling = xenon_set_uhs_signaling,
>
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