This patch adds the functions to gate the xp70 clock on suspend and resume.
Signed-off-by: Ludovic Barre <[email protected]> Signed-off-by: Peter Griffin <[email protected]> --- drivers/dma/st_fdma.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/drivers/dma/st_fdma.c b/drivers/dma/st_fdma.c index 5fcaf10..48a66c9 100644 --- a/drivers/dma/st_fdma.c +++ b/drivers/dma/st_fdma.c @@ -1132,10 +1132,51 @@ static int st_fdma_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int st_fdma_pm_suspend(struct device *dev) +{ + struct st_fdma_dev *fdev = dev_get_drvdata(dev); + int ret; + + if (atomic_read(&fdev->fw_loaded)) { + ret = st_fdma_disable(fdev); + if (ret & FDMA_EN_RUN) { + dev_warn(fdev->dev, "Failed to disable channels"); + return -EBUSY; + } + } + + st_fdma_clk_disable(fdev); + + return 0; +} + +static int st_fdma_pm_resume(struct device *dev) +{ + struct st_fdma_dev *fdev = dev_get_drvdata(dev); + int ret; + + ret = st_fdma_clk_enable(fdev); + if (ret) { + dev_err(fdev->dev, "Failed to enable clocks\n"); + goto out; + } + + ret = st_fdma_get_fw(fdev); +out: + return ret; +} +#endif + +static const struct dev_pm_ops st_fdma_pm = { + SET_RUNTIME_PM_OPS(st_fdma_pm_suspend, st_fdma_pm_resume, NULL) +}; + static struct platform_driver st_fdma_platform_driver = { .driver = { .name = "st-fdma", .of_match_table = st_fdma_match, + .pm = &st_fdma_pm, }, .probe = st_fdma_probe, .remove = st_fdma_remove, -- 1.9.1
