From: lintao <lintao@rock-chips.com>
Date: Mon, 14 Jul 2014 03:43:27 +0000 (+0800)
Subject: mmc: fix drv_e for sd in ultraHS sw
X-Git-Tag: firefly_0821_release~4978
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=541c41ff1db8ffbe8451c980ddb9624c8646d0b5;p=firefly-linux-kernel-4.4.55.git

mmc: fix drv_e for sd in ultraHS sw
---

diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
index e73b3c052f55..e0691fe975eb 100755
--- a/drivers/mmc/host/dw_mmc-rockchip.c
+++ b/drivers/mmc/host/dw_mmc-rockchip.c
@@ -327,7 +327,7 @@ static int dw_mci_rockchip_execute_tuning(struct dw_mci_slot *slot, u32 opcode,
 	u8 step;
 	u8 candidates_delayline[MAX_DELAY_LINE] = {0};
 	u8 candidates_degree[SDMMC_SHIFT_DEGREE_INVALID] = {4,4,4,4};
-	u8 default_drv = IO_DRV_8MA;
+	u8 default_drv;
 	u8 index = 0;
 	u8 start_degree = 0;
 	u32 start_delayline = 0;
@@ -387,6 +387,11 @@ static int dw_mci_rockchip_execute_tuning(struct dw_mci_slot *slot, u32 opcode,
 
 re_phase:
         /* calcute slew rate & drv strength in timing tuning */
+        if(host->mmc->restrict_caps & RESTRICT_CARD_TYPE_SD)
+                default_drv = IO_DRV_4MA;
+        else
+                default_drv = IO_DRV_8MA;
+
         dw_mci_rockchip_load_signal_integrity(host, SLEW_RATE_SLOW, default_drv);
         /* Loop degree from 0 ~ 270 */
         for(start_degree = SDMMC_SHIFT_DEGREE_0; start_degree < SDMMC_SHIFT_DEGREE_270; start_degree++){