diff options
Diffstat (limited to 'drivers/char/hw_random/msm-rng.c')
| -rw-r--r-- | drivers/char/hw_random/msm-rng.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/char/hw_random/msm-rng.c b/drivers/char/hw_random/msm-rng.c index 841fee845ec9..48f2ef138d4a 100644 --- a/drivers/char/hw_random/msm-rng.c +++ b/drivers/char/hw_random/msm-rng.c @@ -14,6 +14,7 @@ #include <linux/clk.h> #include <linux/err.h> #include <linux/hw_random.h> +#include <linux/interconnect.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> @@ -39,6 +40,7 @@ struct msm_rng { void __iomem *base; struct clk *clk; struct hwrng hwrng; + struct icc_path *path; }; #define to_msm_rng(p) container_of(p, struct msm_rng, hwrng) @@ -94,6 +96,8 @@ static int msm_rng_read(struct hwrng *hwrng, void *data, size_t max, bool wait) if (ret) return ret; + icc_set(rng->path, 0, 800); + /* read random data from hardware */ do { val = readl_relaxed(rng->base + PRNG_STATUS); @@ -112,6 +116,8 @@ static int msm_rng_read(struct hwrng *hwrng, void *data, size_t max, bool wait) break; } while (currsize < maxsize); + icc_set(rng->path, 0, 0); + clk_disable_unprepare(rng->clk); return currsize; @@ -148,6 +154,10 @@ static int msm_rng_probe(struct platform_device *pdev) if (IS_ERR(rng->clk)) return PTR_ERR(rng->clk); + rng->path = of_icc_get(&pdev->dev, "cpu"); + if (IS_ERR(rng->path)) + return PTR_ERR(rng->path); + rng->hwrng.name = KBUILD_MODNAME, rng->hwrng.init = msm_rng_init, rng->hwrng.cleanup = msm_rng_cleanup, |