diff options
| author | Corentin Labbe <clabbe.montjoie@gmail.com> | 2019-09-24 11:08:32 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-10-04 18:06:21 +0300 |
| commit | 554c42b4efd486c322a46420f9cf0f6c767ac02c (patch) | |
| tree | 4661f0436751c31f17198a50e5325958674710ab /drivers/crypto/sunxi-ss/sun4i-ss-prng.c | |
| parent | 70dd444ad0a023d853b5d84e68226a792bb17a82 (diff) | |
| download | linux-554c42b4efd486c322a46420f9cf0f6c767ac02c.tar.xz | |
crypto: sun4i-ss - enable pm_runtime
This patch enables power management on the Security System.
sun4i-ss now depends on PM because it simplify code and prevent some ifdef.
But this is not a problem since arch maintainer want ARCH_SUNXI to
depend on PM in the future.
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/sunxi-ss/sun4i-ss-prng.c')
| -rw-r--r-- | drivers/crypto/sunxi-ss/sun4i-ss-prng.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-prng.c b/drivers/crypto/sunxi-ss/sun4i-ss-prng.c index 63d636424161..729aafdbea84 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-prng.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-prng.c @@ -17,7 +17,7 @@ int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, { struct sun4i_ss_alg_template *algt; struct rng_alg *alg = crypto_rng_alg(tfm); - int i; + int i, err; u32 v; u32 *data = (u32 *)dst; const u32 mode = SS_OP_PRNG | SS_PRNG_CONTINUE | SS_ENABLED; @@ -28,6 +28,10 @@ int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, algt = container_of(alg, struct sun4i_ss_alg_template, alg.rng); ss = algt->ss; + err = pm_runtime_get_sync(ss->dev); + if (err < 0) + return err; + spin_lock_bh(&ss->slock); writel(mode, ss->base + SS_CTL); @@ -52,5 +56,8 @@ int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, writel(0, ss->base + SS_CTL); spin_unlock_bh(&ss->slock); + + pm_runtime_put(ss->dev); + return 0; } |