[PATCH v3 5/5] mtd: spi-nor: cadence-quadspi: Add runtime PM support
From: marek.vasut@gmail.com (Marek Vasut)
Date: 2017-09-24 12:11:58
Also in:
linux-devicetree, lkml
On 09/24/2017 12:59 PM, Vignesh R wrote:
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>
Are you planning to add some more fine-grained PM control later?
quoted hunk ↗ jump to hunk
--- 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 d9629e8f4798..2c8e6226d267 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>@@ -1224,6 +1225,13 @@ 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");@@ -1275,6 +1283,9 @@ 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; }
-- Best regards, Marek Vasut