diff options
| author | Eric Biggers <ebiggers@kernel.org> | 2026-06-08 17:58:45 +0000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2026-07-05 13:19:52 +0800 |
| commit | 0fd97bbda2842d7dcccee599ac2c0e9554bdddbc (patch) | |
| tree | ca3e795e6dcabd9fdd84bacaeb9e9f88efed33f3 | |
| parent | d41a9fcfb7f9ee36e4a4aaf5e7996bca6be1e7a9 (diff) | |
crypto: qcom-rng - Enable clock in hwrng case
Fix qcom-rng.c to enable the clock before accessing the hardware.
Fixes: f29cd5bb64c2 ("crypto: qcom-rng - Add hw_random interface support")
Cc: stable@vger.kernel.org
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/qcom-rng.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/crypto/qcom-rng.c b/drivers/crypto/qcom-rng.c index 150e5802e351..f31a7fe07ba7 100644 --- a/drivers/crypto/qcom-rng.c +++ b/drivers/crypto/qcom-rng.c @@ -113,6 +113,13 @@ static int qcom_rng_seed(struct crypto_rng *tfm, const u8 *seed, return 0; } +static int qcom_hwrng_init(struct hwrng *hwrng) +{ + struct qcom_rng *qrng = container_of(hwrng, struct qcom_rng, hwrng); + + return clk_prepare_enable(qrng->clk); +} + static int qcom_hwrng_read(struct hwrng *hwrng, void *data, size_t max, bool wait) { struct qcom_rng *qrng = container_of(hwrng, struct qcom_rng, hwrng); @@ -120,6 +127,13 @@ static int qcom_hwrng_read(struct hwrng *hwrng, void *data, size_t max, bool wai return qcom_rng_read(qrng, data, max); } +static void qcom_hwrng_cleanup(struct hwrng *hwrng) +{ + struct qcom_rng *qrng = container_of(hwrng, struct qcom_rng, hwrng); + + clk_disable_unprepare(qrng->clk); +} + static int qcom_rng_enable(struct qcom_rng *rng) { u32 val; @@ -208,7 +222,9 @@ static int qcom_rng_probe(struct platform_device *pdev) if (rng->match_data->hwrng_support) { rng->hwrng.name = "qcom_hwrng"; + rng->hwrng.init = qcom_hwrng_init; rng->hwrng.read = qcom_hwrng_read; + rng->hwrng.cleanup = qcom_hwrng_cleanup; rng->hwrng.quality = QCOM_TRNG_QUALITY; ret = devm_hwrng_register(&pdev->dev, &rng->hwrng); if (ret) { |