queue-4.4/mmc-sdhci-of-esdhc-add-erratum-esdhc-a001-and-a-0083.patch

   1 From d7735df1090923b5ebdffbb9505d247936446e09 Mon Sep 17 00:00:00 2001
   2 From: Yinbo Zhu <yinbo.zhu@nxp.com>
   3 Date: Mon, 11 Mar 2019 02:16:40 +0000
   4 Subject: mmc: sdhci-of-esdhc: add erratum eSDHC-A001 and A-008358 support
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 [ Upstream commit 05cb6b2a66fa7837211a060878e91be5eb10cb07 ]
  10
  11 eSDHC-A001: The data timeout counter (SYSCTL[DTOCV]) is not
  12 reliable for DTOCV values 0x4(2^17 SD clock), 0x8(2^21 SD clock),
  13 and 0xC(2^25 SD clock). The data timeout counter can count from
  14 2^13–2^27, but for values 2^17, 2^21, and 2^25, the timeout
  15 counter counts for only 2^13 SD clocks.
  16 A-008358: The data timeout counter value loaded into the timeout
  17 counter is less than expected and can result into early timeout
  18 error in case of eSDHC data transactions. The table below shows
  19 the expected vs actual timeout period for different values of
  20 SYSCTL[DTOCV]:
  21 these two erratum has the same quirk to control it, and set
  22 SDHCI_QUIRK_RESET_AFTER_REQUEST to fix above issue.
  23
  24 Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com>
  25 Acked-by: Adrian Hunter <adrian.hunter@intel.com>
  26 Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
  27 Signed-off-by: Sasha Levin <sashal@kernel.org>
  28 ---
  29  drivers/mmc/host/sdhci-of-esdhc.c | 4 +++-
  30  1 file changed, 3 insertions(+), 1 deletion(-)
  31
  32 diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
  33 index a5a11e7ab53b4..356b294c93c9e 100644
  34 --- a/drivers/mmc/host/sdhci-of-esdhc.c
  35 +++ b/drivers/mmc/host/sdhci-of-esdhc.c
  36 @@ -624,8 +624,10 @@ static int sdhci_esdhc_probe(struct platform_device *pdev)
  37         if (esdhc->vendor_ver > VENDOR_V_22)
  38                 host->quirks &= ~SDHCI_QUIRK_NO_BUSY_IRQ;
  39
  40 -       if (of_find_compatible_node(NULL, NULL, "fsl,p2020-esdhc"))
  41 +       if (of_find_compatible_node(NULL, NULL, "fsl,p2020-esdhc")) {
  42                 host->quirks2 |= SDHCI_QUIRK_RESET_AFTER_REQUEST;
  43 +               host->quirks2 |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
  44 +       }
  45
  46         if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
  47             of_device_is_compatible(np, "fsl,p5020-esdhc") ||
  48 --
  49 2.20.1
  50