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Commit 23e291c2 authored by Brian Norris's avatar Brian Norris Committed by Mark Brown
Browse files

spi: rockchip: support "sleep" pin configuration 



In the pattern of many other devices, support a system-sleep pin
configuration.

Signed-off-by: default avatarBrian Norris <briannorris@chromium.org>
Reviewed-by: default avatarDouglas Anderson <dianders@chromium.org>
Tested-by: default avatarCaesar Wang <wxt@rock-chips.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent fafd6794

Documentation/devicetree/bindings/spi/spi-rockchip.txt

+7 −0
Original line number Diff line number Diff line
@@ -31,6 +31,10 @@ Optional Properties: 
- rx-sample-delay-ns: nanoseconds to delay after the SCLK edge before sampling

		Rx data (may need to be fine tuned for high capacitance lines).

		No delay (0) by default.

- pinctrl-names: Names for the pin configuration(s); may be "default" or

		"sleep", where the "sleep" configuration may describe the state

		the pins should be in during system suspend. See also

		pinctrl/pinctrl-bindings.txt.





Example:
@@ -46,4 +50,7 @@ Example: 
		interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;

		clocks = <&cru SCLK_SPI0>, <&cru PCLK_SPI0>;

		clock-names = "spiclk", "apb_pclk";

		pinctrl-0 = <&spi1_pins>;

		pinctrl-1 = <&spi1_sleep>;

		pinctrl-names = "default", "sleep";

	};

drivers/spi/spi-rockchip.c

+5 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/dmaengine.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/pinctrl/consumer.h>

#include <linux/platform_device.h>

#include <linux/spi/spi.h>

#include <linux/pm_runtime.h>
@@ -843,6 +844,8 @@ static int rockchip_spi_suspend(struct device *dev) 
		clk_disable_unprepare(rs->apb_pclk);

	}



	pinctrl_pm_select_sleep_state(dev);



	return ret;

}
@@ -852,6 +855,8 @@ static int rockchip_spi_resume(struct device *dev) 
	struct spi_master *master = dev_get_drvdata(dev);

	struct rockchip_spi *rs = spi_master_get_devdata(master);



	pinctrl_pm_select_default_state(dev);



	if (!pm_runtime_suspended(dev)) {

		ret = clk_prepare_enable(rs->apb_pclk);

		if (ret < 0)