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Commit ba3ab637 authored by Vinod Koul's avatar Vinod Koul Committed by Herbert Xu
Browse files

crypto: qcom-rng - Add support for prng-ee 



Qcom 8996 and later chips features multiple Execution Environments
(EE) and secure world is typically responsible for configuring the
prng.

Add driver data for qcom,prng as 0 and qcom,prng-ee as 1 and use
that to skip initialization routine.

Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 3be36ce1

drivers/crypto/qcom-rng.c

+9 −2
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ struct qcom_rng { 
	struct mutex lock;

	void __iomem *base;

	struct clk *clk;

	unsigned int skip_init;

};



struct qcom_rng_ctx {
@@ -128,7 +129,10 @@ static int qcom_rng_init(struct crypto_tfm *tfm) 


	ctx->rng = qcom_rng_dev;



	if (!ctx->rng->skip_init)

		return qcom_rng_enable(ctx->rng);



	return 0;

}



static struct rng_alg qcom_rng_alg = {
@@ -168,6 +172,8 @@ static int qcom_rng_probe(struct platform_device *pdev) 
	if (IS_ERR(rng->clk))

		return PTR_ERR(rng->clk);



	rng->skip_init = (unsigned long)device_get_match_data(&pdev->dev);



	qcom_rng_dev = rng;

	ret = crypto_register_rng(&qcom_rng_alg);

	if (ret) {
@@ -188,7 +194,8 @@ static int qcom_rng_remove(struct platform_device *pdev) 
}



static const struct of_device_id qcom_rng_of_match[] = {

	{ .compatible = "qcom,prng" },

	{ .compatible = "qcom,prng", .data = (void *)0},

	{ .compatible = "qcom,prng-ee", .data = (void *)1},

	{}

};

MODULE_DEVICE_TABLE(of, qcom_rng_of_match);