spi: spi-qcom-qspi: Support pinctrl sleep states

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 <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230323102605.5.I79544b9486033bd7b27f2be55adda6d36f62a366@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-qcom-qspi.c b/drivers/spi/spi-qcom-qspi.c
index aa91a6c..fab1553 100644 (file)
--- 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>
@@ -579,6 +580,8 @@ static int __maybe_unused qcom_qspi_runtime_suspend(struct device *dev)
                return ret;
        }
 
+       pinctrl_pm_select_sleep_state(dev);
+
        return 0;
 }
 
@@ -588,6 +591,8 @@ 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",