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Commit d084e13a authored by Govindraj Raja's avatar Govindraj Raja Committed by Herbert Xu
Browse files

crypto: img-hash - Add suspend resume hooks for img hash 



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: default avatarGovindraj Raja <Govindraj.Raja@imgtec.com>
Reviewed-by: default avatarWill Thomas <will.thomas@imgtec.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 302a1bee

drivers/crypto/img-hash.c

+27 −0
Original line number Diff line number Diff line
@@ -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),

	}

};