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[v4,09/12] mmc: sdhci-omap: Workaround for Errata i834

Message ID 20180425120937.29867-10-kishon@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Kishon Vijay Abraham I April 25, 2018, 12:09 p.m. UTC 
Errata i834 in AM572x Sitara Processors Silicon Revision 2.0, 1.1
(SPRZ429L July 2014–Revised April 2018 [1]) mentions the maximum
obtainable timeout through MMC host controller is 700ms. And for
commands taking longer than 700ms, hardware timeout should be
disabled and software timeout should be used.

The workaround for Errata i834 can be achieved by adding
SDHCI_QUIRK2_DISABLE_HW_TIMEOUT quirk in sdhci-omap.

[1] -> http://www.ti.com/lit/er/sprz429l/sprz429l.pdf

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
---
 drivers/mmc/host/sdhci-omap.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Adrian Hunter April 26, 2018, 7:53 a.m. UTC | #1 
On 25/04/18 15:09, Kishon Vijay Abraham I wrote:
> Errata i834 in AM572x Sitara Processors Silicon Revision 2.0, 1.1
> (SPRZ429L July 2014–Revised April 2018 [1]) mentions the maximum
> obtainable timeout through MMC host controller is 700ms. And for
> commands taking longer than 700ms, hardware timeout should be
> disabled and software timeout should be used.
> 
> The workaround for Errata i834 can be achieved by adding
> SDHCI_QUIRK2_DISABLE_HW_TIMEOUT quirk in sdhci-omap.
> 
> [1] -> http://www.ti.com/lit/er/sprz429l/sprz429l.pdf
> 
> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
> Acked-by: Tony Lindgren <tony@atomide.com>

Acked-by: Adrian Hunter <adrian.hunter@intel.com>

> ---
>  drivers/mmc/host/sdhci-omap.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
> index 2d9ea23610d5..b2c54940d032 100644
> --- a/drivers/mmc/host/sdhci-omap.c
> +++ b/drivers/mmc/host/sdhci-omap.c
> @@ -715,7 +715,8 @@ static const struct sdhci_pltfm_data sdhci_omap_pdata = {
>  		  SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC,
>  	.quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN |
>  		   SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
> -		   SDHCI_QUIRK2_RSP_136_HAS_CRC,
> +		   SDHCI_QUIRK2_RSP_136_HAS_CRC |
> +		   SDHCI_QUIRK2_DISABLE_HW_TIMEOUT,
>  	.ops = &sdhci_omap_ops,
>  };
>  
> 

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diff mbox

Patch

diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
index 2d9ea23610d5..b2c54940d032 100644
--- a/drivers/mmc/host/sdhci-omap.c
+++ b/drivers/mmc/host/sdhci-omap.c
@@ -715,7 +715,8 @@  static const struct sdhci_pltfm_data sdhci_omap_pdata = {
 		  SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC,
 	.quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN |
 		   SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
-		   SDHCI_QUIRK2_RSP_136_HAS_CRC,
+		   SDHCI_QUIRK2_RSP_136_HAS_CRC |
+		   SDHCI_QUIRK2_DISABLE_HW_TIMEOUT,
 	.ops = &sdhci_omap_ops,
 };