diff options
| author | Wenyou Yang <wenyou.yang@atmel.com> | 2014-03-05 09:58:49 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-03-05 11:21:47 +0800 |
| commit | 5bdfd491a01955727a6b2382534ec7760174863e (patch) | |
| tree | 42ee015bf457b62106e1d1fdb1f8de9db7b2670a /drivers/spi | |
| parent | ad6f33d22c25e7340107a330e6de60bba57ecf52 (diff) | |
spi: atmel: adopt pinctrl support
Amend the spi atmel 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 spitransfer
- "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: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-atmel.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index 4804586edd2..c83b0c620fa 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -26,6 +26,7 @@ #include <linux/io.h> #include <linux/gpio.h> +#include <linux/pinctrl/consumer.h> /* SPI register offsets */ #define SPI_CR 0x0000 @@ -1292,6 +1293,9 @@ static int atmel_spi_probe(struct platform_device *pdev) struct spi_master *master; struct atmel_spi *as; + /* Select default pin state */ + pinctrl_pm_select_default_state(&pdev->dev); + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!regs) return -ENXIO; @@ -1446,6 +1450,9 @@ static int atmel_spi_suspend(struct device *dev) struct atmel_spi *as = spi_master_get_devdata(master); clk_disable_unprepare(as->clk); + + pinctrl_pm_select_sleep_state(dev); + return 0; } @@ -1454,6 +1461,8 @@ static int atmel_spi_resume(struct device *dev) struct spi_master *master = dev_get_drvdata(dev); struct atmel_spi *as = spi_master_get_devdata(master); + pinctrl_pm_select_default_state(dev); + clk_prepare_enable(as->clk); return 0; } |