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authorVignesh R <vigneshr@ti.com>2017-10-03 10:49:25 +0530
committerCyrille Pitchen <cyrille.pitchen@wedev4u.fr>2017-10-17 20:42:10 +0200
commit4892b374c9b79729da33bf94612588a6556709be (patch)
tree041174638f1ba17e9331ffb78cb82e0b5435b3ad /drivers/mtd
parent329864d35a7f49bed78bc3302fc56317c325f31f (diff)
downloadlinux-4892b374c9b79729da33bf94612588a6556709be.tar.bz2
mtd: spi-nor: cadence-quadspi: Add runtime PM support
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> Acked-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/spi-nor/cadence-quadspi.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/mtd/spi-nor/cadence-quadspi.c b/drivers/mtd/spi-nor/cadence-quadspi.c
index 60b557e00cfb..75a2bc447a99 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>
@@ -1224,10 +1225,17 @@ static int cqspi_probe(struct platform_device *pdev)
return -ENXIO;
}
+ pm_runtime_enable(dev);
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(dev);
+ return ret;
+ }
+
ret = clk_prepare_enable(cqspi->clk);
if (ret) {
dev_err(dev, "Cannot enable QSPI clock.\n");
- return ret;
+ goto probe_clk_failed;
}
cqspi->master_ref_clk_hz = clk_get_rate(cqspi->clk);
@@ -1259,6 +1267,9 @@ probe_setup_failed:
cqspi_controller_enable(cqspi, 0);
probe_irq_failed:
clk_disable_unprepare(cqspi->clk);
+probe_clk_failed:
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
return ret;
}
@@ -1275,6 +1286,9 @@ 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;
}