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@xxxxxxxxx>
---
drivers/mmc/host/atmel-mci.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 4df1599..eb4bfbc 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -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>
@@ -2385,6 +2386,8 @@ static int __init atmci_probe(struct platform_device *pdev)
int irq;
int ret, i;
+ pinctrl_pm_select_default_state(&pdev->dev);
+
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs)
return -ENXIO;
@@ -2568,6 +2571,8 @@ static int atmci_runtime_suspend(struct device *dev)
clk_disable_unprepare(host->mck);
+ pinctrl_pm_select_sleep_state(dev);
+
return 0;
}
@@ -2575,6 +2580,8 @@ 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
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
