[PATCH RESEND v7 2/2] mmc: host: sdhci: Add support to disable SDR104/SDR50/DDR50 based on capability register 0.
From: Ulf Hansson <hidden>
Date: 2015-05-26 12:36:49
Also in:
linux-devicetree, linux-mmc, linuxppc-dev
On 21 May 2015 at 10:43, Suman Tripathi [off-list ref] wrote:
quoted hunk
The sdhci framework disables SDR104/SDR50/DDR50 based on only quirk. This patch adds the support to disable SDR104/SDR50/DDR50 based on reading the capability register 0. Signed-off-by: Suman Tripathi <redacted> --- --- drivers/mmc/host/sdhci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 58c1770..a3d9b8a 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c@@ -3118,7 +3118,8 @@ int sdhci_add_host(struct sdhci_host *host) } } - if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V) + if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V || + !(caps[0] & SDHCI_CAN_VDD_180)) caps[1] &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_DDR50); --1.8.2.1
I have no problem with this patch, except that it would be nice to get a few "tested by" to make sure it doesn't break UHS support for some SoCs. Kind regards Uffe