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mmc: atmel-mci: adopt pinctrl support 

Amend the atmel mci pin controller to optionally take a pin control
handle and set the state of the pins to:
- "default" on boot, resume and before performing an transfer.
- "sleep" on suspend().

This should make it possible to optimize energy usage for the pins
both for the suspend/resume cycle.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wenyou Yang 2014-11-07 08:48:13 +08:00 committed by Ulf Hansson
parent e9fb05d5bc
commit b5b64fa6cd
1 changed files with 5 additions and 0 deletions
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5
drivers/mmc/host/atmel-mci.c
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@ -39,6 +39,7 @@
#include <linux/atmel_pdc.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/pinctrl/consumer.h>
#include <asm/cacheflush.h>
#include <asm/io.h>
@ -2568,6 +2569,8 @@ static int atmci_runtime_suspend(struct device *dev)
clk_disable_unprepare(host->mck);
pinctrl_pm_select_sleep_state(dev);
return 0;
}
@ -2575,6 +2578,8 @@ static int atmci_runtime_resume(struct device *dev)
{
struct atmel_mci *host = dev_get_drvdata(dev);
pinctrl_pm_select_default_state(dev);
return clk_prepare_enable(host->mck);
}
#endif