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authorChen-Yu Tsai <wens@csie.org>2019-04-13 11:32:49 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-25 19:43:11 +0200
commit9c4adfb5dc1326f94d3e212a8b5dfb238839b9ae (patch)
treec3070ab54583aa7ea61c366800c926604a4a8a66 /drivers/nvmem
parentdd4c1047b1d6e05f28a1318aa1c4df627f2e91d4 (diff)
downloadlinux-9c4adfb5dc1326f94d3e212a8b5dfb238839b9ae.tar.bz2
nvmem: sunxi_sid: Read out SID for randomness without looping
Since the reg_read callbacks already support arbitrary, but 4-byte aligned. offsets and lengths into the SID, there is no need for another for loop just to use it to read 1 byte at a time. Read out the whole SID block in one go. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem')
-rw-r--r--drivers/nvmem/sunxi_sid.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/nvmem/sunxi_sid.c b/drivers/nvmem/sunxi_sid.c
index 570a2e354f30..704c35edf796 100644
--- a/drivers/nvmem/sunxi_sid.c
+++ b/drivers/nvmem/sunxi_sid.c
@@ -154,7 +154,7 @@ static int sunxi_sid_probe(struct platform_device *pdev)
struct resource *res;
struct nvmem_device *nvmem;
struct sunxi_sid *sid;
- int i, size;
+ int size;
char *randomness;
const struct sunxi_sid_cfg *cfg;
@@ -189,8 +189,7 @@ static int sunxi_sid_probe(struct platform_device *pdev)
if (!randomness)
return -ENOMEM;
- for (i = 0; i < size; i++)
- econfig.reg_read(sid, i, &randomness[i], 1);
+ econfig.reg_read(sid, 0, randomness, size);
add_device_randomness(randomness, size);
kfree(randomness);