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i2c: at91: adopt pinctrl support
Amend the at91 i2c pin controller to set the state of the pins to: - "default" on resume. - "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: Wolfram Sang <wsa@the-dreams.de>
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@ -32,6 +32,7 @@
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#include <linux/slab.h>
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#include <linux/platform_data/dma-atmel.h>
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#include <linux/pm_runtime.h>
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#include <linux/pinctrl/consumer.h>
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#define DEFAULT_TWI_CLK_HZ 100000 /* max 400 Kbits/s */
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#define AT91_I2C_TIMEOUT msecs_to_jiffies(100) /* transfer timeout */
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@ -851,6 +852,8 @@ static int at91_twi_runtime_suspend(struct device *dev)
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clk_disable_unprepare(twi_dev->clk);
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pinctrl_pm_select_sleep_state(dev);
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return 0;
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}
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@ -858,6 +861,8 @@ static int at91_twi_runtime_resume(struct device *dev)
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{
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struct at91_twi_dev *twi_dev = dev_get_drvdata(dev);
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pinctrl_pm_select_default_state(dev);
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return clk_prepare_enable(twi_dev->clk);
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}
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