> -----Original Message----- > From: Ulf Hansson [mailto:ulf.hansson@xxxxxxxxxx] > Sent: Monday, August 18, 2014 5:39 PM > To: Dong, Chuanxiao > Cc: linux-mmc; chris@xxxxxxxxxx > Subject: Re: [PATCH] mmc: sdhci: check 1.2v IO capability for SDHC host > > On 14 August 2014 12:05, Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx> > wrote: > > Right now enable 1.2v IO voltage for SDHC is by using vqmmc. > > Thus for the host which doesn't have vqmmc, or its vqmmc does not > > support 1.2v, directly use MMC_CAP2_HS200 may cause HS200 failure. > > > > So needs to check if vqmmc is able to support 1.2v. If it does not > > support, disable 1.2v IO for HS200. > > > > Signed-off-by: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx> > > --- > > drivers/mmc/host/sdhci.c | 6 +++++- > > 1 file changed, 5 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index > > c026ec8..6b701e1 100644 > > --- a/drivers/mmc/host/sdhci.c > > +++ b/drivers/mmc/host/sdhci.c > > @@ -2999,8 +2999,12 @@ int sdhci_add_host(struct sdhci_host *host) > > /* SD3.0: SDR104 is supported so (for eMMC) the caps2 > > * field can be promoted to support HS200. > > */ > > - if (!(host->quirks2 & SDHCI_QUIRK2_BROKEN_HS200)) > > + if (!(host->quirks2 & SDHCI_QUIRK2_BROKEN_HS200)) { > > mmc->caps2 |= MMC_CAP2_HS200; > > + if (!host->vqmmc || > > + !regulator_is_supported_voltage > > This needs a rebase and please use IS_ERR. > > (!IS_ERR(mmc->supply.vqmmc) ... Oh, I still use the old mmc-next tree. Will do the rebase; Thanks Chuanxiao > > Kind regards > Uffe > > > > + (host->vqmmc, 1100000, > 1300000)) > > + mmc->caps2 &= > ~MMC_CAP2_HS200_1_2V_SDR; > > + } > > } else if (caps[1] & SDHCI_SUPPORT_SDR50) > > mmc->caps |= MMC_CAP_UHS_SDR50; > > > > -- > > 1.7.10.4 > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-mmc" > > in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo > > info at http://vger.kernel.org/majordomo-info.html ��.n��������+%������w��{.n�����{��i��)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
