[PATCH v7 2/2] mmc: host: sdhci: Add support to disable SDR104/SDR50/DDR50 based on capability register 0.

Subsystems: multimedia card (mmc), secure digital (sd) and sdio subsystem, secure digital host controller interface (sdhci) driver, the rest

STALE4103d

2 messages, 2 authors, 2015-05-18 · open the first message on its own page

[PATCH v7 2/2] mmc: host: sdhci: Add support to disable SDR104/SDR50/DDR50 based on capability register 0.

From: Suman Tripathi <hidden>
Date: 2015-05-13 11:51:52 

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

Re: [PATCH v7 2/2] mmc: host: sdhci: Add support to disable SDR104/SDR50/DDR50 based on capability register 0.

From: Suman Tripathi <hidden>
Date: 2015-05-18 07:06:07 

On Wed, May 13, 2015 at 5:21 PM, 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 didn't get any comments on this patch . Can anyone review it
(Michal , Ulf , Arnd etc ...)?


-- 
Thanks,
with regards,
Suman Tripathi
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