diff options
| author | BOUGH CHEN <haibo.chen@nxp.com> | 2018-12-28 08:35:49 +0000 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2019-02-25 08:40:58 +0100 |
| commit | 2b06e1597ac200de8e5cffc3b2a3e287f62258a1 (patch) | |
| tree | 231e7e0f38d35282af6cbe2d87851574dc995c36 /drivers/mmc | |
| parent | mmc: sdhci-esdhc-imx: add delay between tuning cycles (diff) | |
| download | linux-2b06e1597ac200de8e5cffc3b2a3e287f62258a1.tar.gz linux-2b06e1597ac200de8e5cffc3b2a3e287f62258a1.zip | |
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 <haibo.chen@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index eba9bcc92ad3..283dab5fc8d4 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", |