From df9bcc2bc0a1f8d2963bd916698268fb2470713b Mon Sep 17 00:00:00 2001
From: Joonyoung Shim <jy0922.shim@samsung.com>
Date: Fri, 25 Nov 2016 12:47:15 +0900
Subject: [PATCH] mmc: dw_mmc: add missing codes for runtime resume
The commit 64997de4fd17 ("mmc: dw_mmc: remove system PM callback") is
missing to call dw_mci_ctrl_reset(). This adds to call
dw_mci_ctrl_reset() and to handle error of clocks.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
drivers/mmc/host/dw_mmc.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index d400afc74719..0aa4bcd85bb7 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -3296,7 +3296,13 @@ int dw_mci_runtime_resume(struct device *dev)
ret = clk_prepare_enable(host->ciu_clk);
if (ret)
- return ret;
+ goto err;
+
+ if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) {
+ clk_disable_unprepare(host->ciu_clk);
+ ret = -ENODEV;
+ goto err;
+ }
if (host->use_dma && host->dma_ops->init)
host->dma_ops->init(host);
@@ -3331,6 +3337,14 @@ int dw_mci_runtime_resume(struct device *dev)
/* Now that slots are all setup, we can enable card detect */
dw_mci_enable_cd(host);
+ return 0;
+
+err:
+ if (host->cur_slot &&
+ (mmc_can_gpio_cd(host->cur_slot->mmc) ||
+ !mmc_card_is_removable(host->cur_slot->mmc)))
+ clk_disable_unprepare(host->biu_clk);
+
return ret;
}
EXPORT_SYMBOL(dw_mci_runtime_resume);
--
2.30.9