diff options
| author | Vignesh R <vigneshr@ti.com> | 2017-10-03 10:49:25 +0530 |
|---|---|---|
| committer | Cyrille Pitchen <cyrille.pitchen@wedev4u.fr> | 2017-10-17 20:42:10 +0200 |
| commit | 4892b374c9b79729da33bf94612588a6556709be (patch) | |
| tree | 041174638f1ba17e9331ffb78cb82e0b5435b3ad /drivers/mtd | |
| parent | 329864d35a7f49bed78bc3302fc56317c325f31f (diff) | |
| download | linux-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.c | 16 |
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; } |