LOCAL / mmc: dw_mmc: exynos: skip the specific sample value

When card is tuning, skip the specific value(0x4).
This patch is workaround.
Until find the optimal solution and root problem, use this workaround.

Change-Id: I60881de6294eab9ba4a2cbf363c3a082987350a3
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>

diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index a84aa3f..d48df8b 100644 (file)
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -456,6 +456,10 @@ static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot, u32 opcode)
                mci_writel(host, TMOUT, ~0);
                smpl = dw_mci_exynos_move_next_clksmpl(host);
 
+               /* Workaround */
+               if (smpl == 4)
+                       continue;
+
                if (!mmc_send_tuning(mmc, opcode, NULL))
                        candiates |= (1 << smpl);