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mmc: dw_mmc: exynos: Warn if HS400 is being used on non-Exynos5420 chipset

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Chipsets before Exynos5420 did not support HS400 so if MMC core tries to
configure HS400 timing, this might or might not work.  Warn in such
cases because this is DTB misconfiguration.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Krzysztof Kozlowski 2016-07-14 15:22:27 +02:00 committed by Ulf Hansson
parent 0ed50abb2d
commit 941a659ffd
1 changed files with 5 additions and 1 deletions
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6
drivers/mmc/host/dw_mmc-exynos.c
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@ -225,8 +225,12 @@ static void dw_mci_exynos_config_hs400(struct dw_mci *host, u32 timing)
* Not supported to configure register
* related to HS400
*/
if (priv->ctrl_type < DW_MCI_TYPE_EXYNOS5420)
if (priv->ctrl_type < DW_MCI_TYPE_EXYNOS5420) {
if (timing == MMC_TIMING_MMC_HS400)
dev_warn(host->dev,
"cannot configure HS400, unsupported chipset\n");
return;
}
dqs = priv->saved_dqs_en;
strobe = priv->saved_strobe_ctrl;