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authorVinod Koul <vkoul@kernel.org>2018-07-16 11:20:26 +0530
committerHerbert Xu <herbert@gondor.apana.org.au>2018-07-27 19:04:32 +0800
commitba3ab6371cdda214bf3d416edae62809a68d0b73 (patch)
tree123857687df48554858f7747e8ee3ffca0d3ab0e /drivers/crypto/qcom-rng.c
parent3be36ce13c9276eb045a55184ff5c08511adb30b (diff)
downloadlinux-ba3ab6371cdda214bf3d416edae62809a68d0b73.tar.bz2
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: Vinod Koul <vkoul@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/qcom-rng.c')
-rw-r--r--drivers/crypto/qcom-rng.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/crypto/qcom-rng.c b/drivers/crypto/qcom-rng.c
index e921382099d7..80544326e310 100644
--- a/drivers/crypto/qcom-rng.c
+++ b/drivers/crypto/qcom-rng.c
@@ -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);