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| author | Yangbo Lu | 2019-06-14 10:29:53 +0200 |
|---|---|---|
| committer | Ulf Hansson | 2019-06-17 13:33:44 +0200 |
| commit | 04509d77097914ae1bd351f4cec751d011844ca3 (patch) | |
| tree | 40144b9b425c00f5759e1dfe8c7d938708c9376a /drivers/mmc | |
| parent | mmc: host: s3cmci: no need to check return value of debugfs_create functions (diff) | |
| download | kernel-qcow2-linux-04509d77097914ae1bd351f4cec751d011844ca3.tar.gz kernel-qcow2-linux-04509d77097914ae1bd351f4cec751d011844ca3.tar.xz kernel-qcow2-linux-04509d77097914ae1bd351f4cec751d011844ca3.zip | |
mmc: sdhci-of-esdhc: set the sd clock divisor value above 3
This patch is to set the sd clock divisor value above 3 in tuning mode
Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-of-esdhc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index 68c5866f5c85..c56c7d413a09 100644 --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -830,9 +830,17 @@ static int esdhc_execute_tuning(struct mmc_host *mmc, u32 opcode) struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host); bool hs400_tuning; + unsigned int clk; u32 val; int ret; + /* For tuning mode, the sd clock divisor value + * must be larger than 3 according to reference manual. + */ + clk = esdhc->peripheral_clock / 3; + if (host->clock > clk) + esdhc_of_set_clock(host, clk); + if (esdhc->quirk_limited_clk_division && host->flags & SDHCI_HS400_TUNING) esdhc_of_set_clock(host, host->clock); |