Messages in this thread Patch in this message | | | From | Kishon Vijay Abraham I <> | Subject | [PATCH v4 09/12] mmc: sdhci-omap: Workaround for Errata i834 | Date | Wed, 25 Apr 2018 17:39:34 +0530 |
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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(-)
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, }; -- 2.17.0
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