在 2016年12月17日 08:59, Brian Norris 写道:
In the pattern of many other devices, support a system-sleep pin
configuration.
Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>
Tested-by: Caesar Wang <wxt@xxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/spi/spi-rockchip.txt | 7 +++++++
drivers/spi/spi-rockchip.c | 5 +++++
2 files changed, 12 insertions(+)
diff --git a/Documentation/devicetree/bindings/spi/spi-rockchip.txt b/Documentation/devicetree/bindings/spi/spi-rockchip.txt
index d2ca153614f9..83da4931d832 100644
--- a/Documentation/devicetree/bindings/spi/spi-rockchip.txt
+++ b/Documentation/devicetree/bindings/spi/spi-rockchip.txt
@@ -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";
};
diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index 0f89c2169c24..acf31f36b898 100644
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -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)
--
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