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

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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: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Vinod Koul 2018-07-16 11:20:26 +05:30 committed by Herbert Xu
parent 3be36ce13c
commit ba3ab6371c
1 changed files with 9 additions and 2 deletions
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11
drivers/crypto/qcom-rng.c
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@ -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;
return qcom_rng_enable(ctx->rng);
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);