From: BOUGH CHEN Date: Fri, 28 Dec 2018 08:35:49 +0000 (+0000) Subject: mmc: sdhci: add delay after the last tuning command X-Git-Tag: v5.1-rc1~184^2~62 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2b06e1597ac200de8e5cffc3b2a3e287f62258a1;p=thirdparty%2Fkernel%2Flinux.git mmc: sdhci: add delay after the last tuning command When host set the host->tuning_delay, even the last tuning command need a delay, otherwise the first command after the tuning will meet issue. Take i.MX7D as an example, there will be the following log: mmc2: switch to high-speed from hs200 failed, err:-110 mmc2: error -110 whilst initialising MMC card Signed-off-by: Haibo Chen Acked-by: Adrian Hunter Signed-off-by: Ulf Hansson --- diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index eba9bcc92ad3c..283dab5fc8d44 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2376,6 +2376,10 @@ static int __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode) return -ETIMEDOUT; } + /* Spec does not require a delay between tuning cycles */ + if (host->tuning_delay > 0) + mdelay(host->tuning_delay); + ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); if (!(ctrl & SDHCI_CTRL_EXEC_TUNING)) { if (ctrl & SDHCI_CTRL_TUNED_CLK) @@ -2383,9 +2387,6 @@ static int __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode) break; } - /* Spec does not require a delay between tuning cycles */ - if (host->tuning_delay > 0) - mdelay(host->tuning_delay); } pr_info("%s: Tuning failed, falling back to fixed sampling clock\n",