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misc: atsha204a: Increase wake delay by tWHI

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From the ATSHA204A datasheet (document DS40002025A):

Wake: If SDA is held low for a period greater than tWLO, the device
exits low-power mode and, after a delay of tWHI, is ready to receive
I2C commands.

tWHI value can be found in table 7-2.

Signed-off-by: Paweł Anikiel <pan@semihalf.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Paweł Anikiel
2022-06-17 12:47:21 +02:00
committed by Tien Fong Chee
parent 61298270c5
commit 73d88cf971
1 changed files with 3 additions and 2 deletions
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5
drivers/misc/atsha204a-i2c.c
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@@ -21,7 +21,8 @@
#include <linux/bitrev.h> #include <linux/bitrev.h>
#include <u-boot/crc.h> #include <u-boot/crc.h>
#define ATSHA204A_TWLO 60 #define ATSHA204A_TWLO_US 60
#define ATSHA204A_TWHI_US 2500
#define ATSHA204A_TRANSACTION_TIMEOUT 100000 #define ATSHA204A_TRANSACTION_TIMEOUT 100000
#define ATSHA204A_TRANSACTION_RETRY 5 #define ATSHA204A_TRANSACTION_RETRY 5
#define ATSHA204A_EXECTIME 5000 #define ATSHA204A_EXECTIME 5000
@@ -109,7 +110,7 @@ int atsha204a_wakeup(struct udevice *dev)
continue; continue;
} }
udelay(ATSHA204A_TWLO); udelay(ATSHA204A_TWLO_US + ATSHA204A_TWHI_US);
res = atsha204a_recv_resp(dev, &resp); res = atsha204a_recv_resp(dev, &resp);
if (res) { if (res) {