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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>
This commit is contained in:
Joonyoung Shim 2016-11-25 12:47:15 +09:00 committed by Ulf Hansson
parent 9b93d392fd
commit df9bcc2bc0
1 changed files with 15 additions and 1 deletions
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16
drivers/mmc/host/dw_mmc.c
View File

@ -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);