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Date: Fri, 27 Apr 2018 17:17:18 +0530 From: Kishon Vijay Abraham I <kishon@...com> To: Ulf Hansson <ulf.hansson@...aro.org>, Adrian Hunter <adrian.hunter@...el.com> CC: Rob Herring <robh+dt@...nel.org>, Mark Rutland <mark.rutland@....com>, <linux-mmc@...r.kernel.org>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>, <kishon@...com> Subject: [PATCH v5 09/14] mmc: sdhci-omap: Workaround for Errata i834 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 <kishon@...com> Acked-by: Tony Lindgren <tony@...mide.com> Acked-by: Adrian Hunter <adrian.hunter@...el.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 d5c1a9c71f95..2232a9974b21 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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