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authorKrzysztof Kozlowski <k.kozlowski@samsung.com>2016-07-14 16:22:27 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2016-09-26 22:31:17 +0300
commit941a659ffdefe31af8222451ca2a74ebab8d98dd (patch)
treea4598db051afae0eef0785e5d70d211e41919155 /drivers/mmc
parent0ed50abb2d8fc81570b53af25621dad560cd49b3 (diff)
downloadlinux-941a659ffdefe31af8222451ca2a74ebab8d98dd.tar.xz
mmc: dw_mmc: exynos: Warn if HS400 is being used on non-Exynos5420 chipset
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>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/dw_mmc-exynos.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index da0ef1765735..7ab3d749b5ae 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -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;