| Message ID | 20190614082954.39648-1-yinbo.zhu@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v1] mmc: sdhci-of-esdhc: set the sd clock divisor value above 3 | expand |
On Fri, 14 Jun 2019 at 10:28, Yinbo Zhu <yinbo.zhu@nxp.com> wrote: > > From: Yangbo Lu <yangbo.lu@nxp.com> > > This patch is to set the sd clock divisor value above 3 in tuning mode > > Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com> > Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Applied for next, thanks! Kind regards Uffe > --- > drivers/mmc/host/sdhci-of-esdhc.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c > index d4ec0a959a75..c4af026c3fba 100644 > --- a/drivers/mmc/host/sdhci-of-esdhc.c > +++ b/drivers/mmc/host/sdhci-of-esdhc.c > @@ -824,9 +824,17 @@ static int esdhc_execute_tuning(struct mmc_host *mmc, u32 opcode) > struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); > struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host); > bool hs400_tuning; > + unsigned int clk; > u32 val; > int ret; > > + /* For tuning mode, the sd clock divisor value > + * must be larger than 3 according to reference manual. > + */ > + clk = esdhc->peripheral_clock / 3; > + if (host->clock > clk) > + esdhc_of_set_clock(host, clk); > + > if (esdhc->quirk_limited_clk_division && > host->flags & SDHCI_HS400_TUNING) > esdhc_of_set_clock(host, host->clock); > -- > 2.17.1 >
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index d4ec0a959a75..c4af026c3fba 100644 --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -824,9 +824,17 @@ static int esdhc_execute_tuning(struct mmc_host *mmc, u32 opcode) struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host); bool hs400_tuning; + unsigned int clk; u32 val; int ret; + /* For tuning mode, the sd clock divisor value + * must be larger than 3 according to reference manual. + */ + clk = esdhc->peripheral_clock / 3; + if (host->clock > clk) + esdhc_of_set_clock(host, clk); + if (esdhc->quirk_limited_clk_division && host->flags & SDHCI_HS400_TUNING) esdhc_of_set_clock(host, host->clock);