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| author | Haibo Chen <haibo.chen@nxp.com> | 2016-08-15 16:31:33 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-09-26 21:31:11 +0200 |
| commit | 2fb0b02b79d1c5ca88e223750a2eb9b0a3679bb0 (patch) | |
| tree | ce867af194711f587d94e68c121c14e57584ca8d /drivers/mmc | |
| parent | a215186d7f057a5ff159824b9f869f835c69e952 (diff) | |
| download | lwn-2fb0b02b79d1c5ca88e223750a2eb9b0a3679bb0.tar.gz lwn-2fb0b02b79d1c5ca88e223750a2eb9b0a3679bb0.zip | |
mmc: sdhci-esdhc-imx: correct the max timeout count
i.MX USDHC Reference Manual has a mistake, for the register SYS_CTRL,
the DTOCV(bit 19~16) means the data timeout counter value. When DTOCV
is set to 0xF, it means SDCLK << 29, not SDCLK << 28.
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Acked-by: Dong Aisheng <aisheng.dong@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-esdhc-imx.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index 437c44887fe7..1f54fd8755c8 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -929,7 +929,8 @@ static unsigned int esdhc_get_max_timeout_count(struct sdhci_host *host) struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); - return esdhc_is_usdhc(imx_data) ? 1 << 28 : 1 << 27; + /* Doc Errata: the uSDHC actual maximum timeout count is 1 << 29 */ + return esdhc_is_usdhc(imx_data) ? 1 << 29 : 1 << 27; } static void esdhc_set_timeout(struct sdhci_host *host, struct mmc_command *cmd) |