| Message ID | 1492671509-22044-1-git-send-email-yangbo.lu@nxp.com (mailing list archive) |
|---|---|
| State | Accepted, archived |
| Headers | show |
On 20/04/17 09:58, Yangbo Lu wrote: > The ls1046a datasheet specified that the max SD clock frequency > for eSDHC SDR104/HS200 was 167MHz, and the ls1012a datasheet > specified it's 125MHz for ls1012a. So this patch is to add the > limitation. > > Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> > --- > drivers/mmc/host/sdhci-of-esdhc.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c > index 49ac197..57966ef 100644 > --- a/drivers/mmc/host/sdhci-of-esdhc.c > +++ b/drivers/mmc/host/sdhci-of-esdhc.c > @@ -456,6 +456,20 @@ static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock) > if (esdhc->vendor_ver < VENDOR_V_23) > pre_div = 2; > > + /* > + * Limit SD clock to 167MHz for ls1046a according to its datasheet > + */ > + if (clock > 167000000 && > + of_find_compatible_node(NULL, NULL, "fsl,ls1046a-esdhc")) > + clock = 167000000; > + > + /* > + * Limit SD clock to 125MHz for ls1012a according to its datasheet > + */ > + if (clock > 125000000 && > + of_find_compatible_node(NULL, NULL, "fsl,ls1012a-esdhc")) > + clock = 125000000; > + > /* Workaround to reduce the clock frequency for p1010 esdhc */ > if (of_find_compatible_node(NULL, NULL, "fsl,p1010-esdhc")) { > if (clock > 20000000) > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 20 April 2017 at 08:58, Yangbo Lu <yangbo.lu@nxp.com> wrote: > The ls1046a datasheet specified that the max SD clock frequency > for eSDHC SDR104/HS200 was 167MHz, and the ls1012a datasheet > specified it's 125MHz for ls1012a. So this patch is to add the > limitation. > > Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Thanks, applied for next! Kind regards Uffe > --- > drivers/mmc/host/sdhci-of-esdhc.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c > index 49ac197..57966ef 100644 > --- a/drivers/mmc/host/sdhci-of-esdhc.c > +++ b/drivers/mmc/host/sdhci-of-esdhc.c > @@ -456,6 +456,20 @@ static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock) > if (esdhc->vendor_ver < VENDOR_V_23) > pre_div = 2; > > + /* > + * Limit SD clock to 167MHz for ls1046a according to its datasheet > + */ > + if (clock > 167000000 && > + of_find_compatible_node(NULL, NULL, "fsl,ls1046a-esdhc")) > + clock = 167000000; > + > + /* > + * Limit SD clock to 125MHz for ls1012a according to its datasheet > + */ > + if (clock > 125000000 && > + of_find_compatible_node(NULL, NULL, "fsl,ls1012a-esdhc")) > + clock = 125000000; > + > /* Workaround to reduce the clock frequency for p1010 esdhc */ > if (of_find_compatible_node(NULL, NULL, "fsl,p1010-esdhc")) { > if (clock > 20000000) > -- > 2.1.0.27.g96db324 > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index 49ac197..57966ef 100644 --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -456,6 +456,20 @@ static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock) if (esdhc->vendor_ver < VENDOR_V_23) pre_div = 2; + /* + * Limit SD clock to 167MHz for ls1046a according to its datasheet + */ + if (clock > 167000000 && + of_find_compatible_node(NULL, NULL, "fsl,ls1046a-esdhc")) + clock = 167000000; + + /* + * Limit SD clock to 125MHz for ls1012a according to its datasheet + */ + if (clock > 125000000 && + of_find_compatible_node(NULL, NULL, "fsl,ls1012a-esdhc")) + clock = 125000000; + /* Workaround to reduce the clock frequency for p1010 esdhc */ if (of_find_compatible_node(NULL, NULL, "fsl,p1010-esdhc")) { if (clock > 20000000)
The ls1046a datasheet specified that the max SD clock frequency for eSDHC SDR104/HS200 was 167MHz, and the ls1012a datasheet specified it's 125MHz for ls1012a. So this patch is to add the limitation. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> --- drivers/mmc/host/sdhci-of-esdhc.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)