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    Subject[PATCH v5 5/6] crypto: qcom: Add support for prng-ee
    Date
    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>
    ---
    drivers/crypto/qcom-rng.c | 11 +++++++++--
    1 file changed, 9 insertions(+), 2 deletions(-)

    diff --git a/drivers/crypto/qcom-rng.c b/drivers/crypto/qcom-rng.c
    index 53e1d276e05e..f1bd86acaf9d 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)of_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);
    --
    2.14.4
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