From: Vinod Koul Subject: [PATCH v3 5/6] crypto: qcom: Add support for prng-ee Date: Tue, 3 Jul 2018 11:34:33 +0530 Message-ID: <20180703060434.19293-6-vkoul@kernel.org> References: <20180703060434.19293-1-vkoul@kernel.org> Cc: Bjorn Andersson , Matt Mackall , Herbert Xu , Arnd Bergmann , Greg Kroah-Hartman , linux-arm-msm@vger.kernel.org, Stephen Boyd , Timur Tabi , Vinod Koul To: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Return-path: In-Reply-To: <20180703060434.19293-1-vkoul@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org 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 --- 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 e235a35359d3..fdbbcac7bcb8 100644 --- a/drivers/crypto/qcom-rng.c +++ b/drivers/crypto/qcom-rng.c @@ -30,6 +30,7 @@ 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