Almost all case is selected to 0.
(It's not correct sample-clock value.)
Since it set to wrong value, HS200 mode don't work fine.
If we want to select the correct value, it has to check from 1 to 7.(skip 0)
Signed-off-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
---
drivers/mmc/host/dw_mmc-exynos.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index 0fbc53a..5294035 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -25,6 +25,7 @@
#define NUM_PINS(x) (x + 2)
#define SDMMC_CLKSEL 0x09C
+#define SDMMC_CLKSEL_CCLK_SAMPLE_MASK 0x7
#define SDMMC_CLKSEL_CCLK_SAMPLE(x) (((x) & 7) << 0)
#define SDMMC_CLKSEL_CCLK_DRIVE(x) (((x) & 7) << 16)
#define SDMMC_CLKSEL_CCLK_DIVIDER(x) (((x) & 7) << 24)
@@ -330,6 +331,12 @@ static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot, u32 opcode,
if (!blk_test)
return -ENOMEM;
+ /*
+ * In order to check all selclk_sample clock,
+ * it needs to reset to 0.
+ */
+ dw_mci_exynos_set_clksmpl(host, 0);
+
start_smpl = dw_mci_exynos_get_clksmpl(host);
do {
@@ -372,7 +379,7 @@ static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot, u32 opcode,
"Tuning error: cmd.error:%d, data.error:%d\n",
cmd.error, data.error);
}
- } while (start_smpl != smpl);
+ } while (start_smpl < SDMMC_CLKSEL_CCLK_SAMPLE_MASK);
found = dw_mci_exynos_get_best_clksmpl(candiates);
if (found >= 0)
--
1.7.9.5
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