From: Govindraj Raja <Govindraj.Raja@xxxxxxxxxx> Current img hash claims sys and periph gate clocks and this can be gated in system suspend scenarios. Add support for Device pm ops for img hash to gate the clocks claimed by img hash. Signed-off-by: Govindraj Raja <Govindraj.Raja@xxxxxxxxxx> Reviewed-by: Will Thomas <will.thomas@xxxxxxxxxx> --- drivers/crypto/img-hash.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c index fbed47a..ed4408a 100644 --- a/drivers/crypto/img-hash.c +++ b/drivers/crypto/img-hash.c @@ -1016,11 +1016,38 @@ static int img_hash_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int img_hash_suspend(struct device *dev) +{ + struct img_hash_dev *hdev = dev_get_drvdata(dev); + + clk_disable_unprepare(hdev->hash_clk); + clk_disable_unprepare(hdev->sys_clk); + + return 0; +} + +static int img_hash_resume(struct device *dev) +{ + struct img_hash_dev *hdev = dev_get_drvdata(dev); + + clk_prepare_enable(hdev->hash_clk); + clk_prepare_enable(hdev->sys_clk); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops img_hash_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(img_hash_suspend, img_hash_resume) +}; + static struct platform_driver img_hash_driver = { .probe = img_hash_probe, .remove = img_hash_remove, .driver = { .name = "img-hash-accelerator", + .pm = &img_hash_pm_ops, .of_match_table = of_match_ptr(img_hash_match), } }; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html