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hwrng: refine hwrng delay for retry

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Per internal test, about 5us-6us is enough for hwrng prepare
the random data. 440us udelay is much more then needed, So
reduce the udelay time for better performance.

Change-Id: I714b67ca6e4f97717db537c799936ea31c96e475
Signed-off-by: Lei wang <leiwan@codeaurora.org>
This commit is contained in:
Lei wang 2021-04-28 09:41:31 +08:00 • committed by Gerrit - the friendly Code Review server
commit f7886d93bf
1 changed files with 2 additions and 2 deletions
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4
drivers/char/hw_random/msm_rng.c
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@ -41,8 +41,8 @@
#define MAX_HW_FIFO_DEPTH 16 /* FIFO is 16 words deep */
#define MAX_HW_FIFO_SIZE (MAX_HW_FIFO_DEPTH * 4) /* FIFO is 32 bits wide */
#define RETRY_MAX_CNT 5 /* max retry times to read register */
#define RETRY_DELAY_INTERVAL 440 /* retry delay interval in us */
#define RETRY_MAX_CNT 500 /* max retry times to read register */
#define RETRY_DELAY_INTERVAL 6 /* retry delay interval in us */
struct msm_rng_device {
struct platform_device *pdev;