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cros_ec: Tidy up a few delays

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Allow a longer time for the EC to reboot. Also use a constant for the
hash delay time, so it is clear what it is for.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-01-16 14:52:23 -07:00
parent d8e9a93895
commit 2525e53c27
1 changed files with 17 additions and 7 deletions
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24
drivers/misc/cros_ec.c
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@ -44,6 +44,10 @@ enum {
CROS_EC_CMD_TIMEOUT_MS = 5000,
/* Timeout waiting for a synchronous hash to be recomputed */
CROS_EC_CMD_HASH_TIMEOUT_MS = 2000,
/* Wait 10 ms between attempts to check if EC's hash is ready */
CROS_EC_HASH_CHECK_DELAY_MS = 10,
};
#define INVALID_HCMD 0xFF
@ -502,9 +506,10 @@ static int cros_ec_wait_on_hash_done(struct udevice *dev,
start = get_timer(0);
while (hash->status == EC_VBOOT_HASH_STATUS_BUSY) {
mdelay(50); /* Insert some reasonable delay */
mdelay(CROS_EC_HASH_CHECK_DELAY_MS);
p->cmd = EC_VBOOT_HASH_GET;
if (ec_command(dev, EC_CMD_VBOOT_HASH, 0, p, sizeof(*p), hash,
sizeof(*hash)) < 0)
return -1;
@ -622,18 +627,23 @@ int cros_ec_reboot(struct udevice *dev, enum ec_reboot_cmd cmd, uint8_t flags)
return -1;
if (!(flags & EC_REBOOT_FLAG_ON_AP_SHUTDOWN)) {
ulong start;
/*
* EC reboot will take place immediately so delay to allow it
* to complete. Note that some reboot types (EC_REBOOT_COLD)
* will reboot the AP as well, in which case we won't actually
* get to this point.
*/
/*
* TODO(rspangler@chromium.org): Would be nice if we had a
* better way to determine when the reboot is complete. Could
* we poll a memory-mapped LPC value?
*/
udelay(50000);
mdelay(50);
start = get_timer(0);
while (cros_ec_hello(dev, NULL)) {
if (get_timer(start) > 3000) {
log_err("EC did not return from reboot\n");
return -ETIMEDOUT;
}
mdelay(5);
}
}
return 0;