[PATCH v2 12/16] mmc: sdhci-omap: Workaround for Errata i834
From: Kishon Vijay Abraham I <hidden>
Date: 2018-02-05 12:54:48
Also in:
linux-devicetree, linux-mmc, linux-omap, lkml
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, secure digital host controller interface (sdhci) driver, secure digital host controller interface (sdhci) ti omap driver, the rest · Maintainers:
Ulf Hansson, Adrian Hunter, Vignesh Raghavendra, Linus Torvalds
Errata i834 in AM572x Sitara Processors Silicon Revision 2.0, 1.1 (SPRZ429K July 2014?Revised March 2017 [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/sprz429k/sprz429k.pdf Signed-off-by: Kishon Vijay Abraham I <redacted> --- 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 c2570db3f7a2..db487b77fbcc 100644
--- a/drivers/mmc/host/sdhci-omap.c
+++ b/drivers/mmc/host/sdhci-omap.c@@ -714,7 +714,8 @@ 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, };
--
2.11.0