[05/14] spi: spi-qcom-qspi: Support pinctrl sleep states

Commit Message

Doug Anderson March 23, 2023, 5:30 p.m. UTC

It's fairly common practice for drivers to switch to a "sleep" pinctrl
state at the end of its runtime_suspend function and then back to
"default" at the beginning of runtime_resume. Let's do that for
spi-qcom-qspi.

Signed-off-by: Douglas Anderson <[e-mail]>
---

 drivers/spi/spi-qcom-qspi.c | 5 +++++
 1 file changed, 5 insertions(+)

Patch

diff --git a/drivers/spi/spi-qcom-qspi.c b/drivers/spi/spi-qcom-qspi.c
index c334dfec4117..7851cf1986cc 100644
--- a/drivers/spi/spi-qcom-qspi.c
+++ b/drivers/spi/spi-qcom-qspi.c
@@ -8,6 +8,7 @@ 
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
+#include <linux/pinctrl/consumer.h>
 #include <linux/pm_runtime.h>
 #include <linux/pm_opp.h>
 #include <linux/spi/spi.h>
@@ -581,6 +582,8 @@  static int __maybe_unused qcom_qspi_runtime_suspend(struct device *dev)
 		return ret;
 	}
 
+	pinctrl_pm_select_sleep_state(dev);
+
 	return 0;
 }
 
@@ -590,6 +593,8 @@  static int __maybe_unused qcom_qspi_runtime_resume(struct device *dev)
 	struct qcom_qspi *ctrl = spi_master_get_devdata(master);
 	int ret;
 
+	pinctrl_pm_select_default_state(dev);
+
 	ret = icc_enable(ctrl->icc_path_cpu_to_qspi);
 	if (ret) {
 		dev_err_ratelimited(ctrl->dev, "%s: ICC enable failed for cpu: %d\n",