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Subject[PATCH 3/7] mtd: spi-nor: cadence-quadspi: Add runtime PM support
Date
Add pm_runtime* calls to cadence-quadspi driver. This is required to
switch on QSPI power domain on TI 66AK2G SoC during probe.

Signed-off-by: Vignesh R <vigneshr@ti.com>
---
drivers/mtd/spi-nor/cadence-quadspi.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/mtd/spi-nor/cadence-quadspi.c b/drivers/mtd/spi-nor/cadence-quadspi.c
index 297c86a2d4a7..1e432916e00b 100644
--- a/drivers/mtd/spi-nor/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/cadence-quadspi.c
@@ -31,6 +31,7 @@
#include <linux/of_device.h>
#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/sched.h>
#include <linux/spi/spi.h>
#include <linux/timer.h>
@@ -1219,6 +1220,13 @@ static int cqspi_probe(struct platform_device *pdev)
return -ENXIO;
}

+ pm_runtime_enable(&pdev->dev);
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(&pdev->dev);
+ return ret;
+ }
+
ret = clk_prepare_enable(cqspi->clk);
if (ret) {
dev_err(dev, "Cannot enable QSPI clock.\n");
@@ -1269,6 +1277,9 @@ static int cqspi_remove(struct platform_device *pdev)

clk_disable_unprepare(cqspi->clk);

+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
return 0;
}

--
2.13.3
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