[coreboot-gerrit] New patch to review for coreboot: e21a91f chromeec: use stopwatch API

[Patrick Georgi (pgeorgi@google.com)]

Patrick Georgi (pgeorgi at google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8816

-gerrit

commit e21a91fa70a4f56a3ddd40f8e1291c194ba71e02
Author: Aaron Durbin <adurbin at chromium.org>
Date:   Tue Sep 23 16:30:53 2014 -0500

    chromeec: use stopwatch API
    
    Simplify the SPI timeout by using the stopwatch.
    
    BUG=None
    BRANCH=None
    TEST=Built nyan. Confirmed stopwatch works independently.
    
    Change-Id: Ida26a0748d4b5a6a28aa8f6e2b92fe2ee4cbe17f
    Signed-off-by: Patrick Georgi <pgeorgi at chromium.org>
    Original-Commit-Id: 900d7ac826b76d49290033c87849bf776684f2c1
    Original-Change-Id: I84b7949060326b7c6cc1872420b93bd44604c4d3
    Original-Signed-off-by: Aaron Durbin <adurbin at chromium.org>
    Original-Reviewed-on: https://chromium-review.googlesource.com/219493
    Original-Reviewed-by: Julius Werner <jwerner at chromium.org>
    Original-Reviewed-by: Furquan Shaikh <furquan at chromium.org>
    Original-Reviewed-by: David Hendricks <dhendrix at chromium.org>
---
 src/ec/google/chromeec/ec_spi.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/ec/google/chromeec/ec_spi.c b/src/ec/google/chromeec/ec_spi.c
index f1bdd3c..ad9a338 100644
--- a/src/ec/google/chromeec/ec_spi.c
+++ b/src/ec/google/chromeec/ec_spi.c
@@ -40,9 +40,9 @@ static int crosec_spi_io(uint8_t *write_bytes, size_t write_size,
 	}
 
 	uint8_t byte;
-	struct mono_time start;
-	struct rela_time rt;
-	timer_monotonic_get(&start);
+	struct stopwatch sw;
+	// Wait 1s for a framing byte.
+	stopwatch_init_usecs_expire(&sw, USECS_PER_SEC);
 	while (1) {
 		if (spi_xfer(slave, NULL, 0, &byte, sizeof(byte))) {
 			printk(BIOS_ERR, "%s: Failed to receive byte.\n",
@@ -53,9 +53,7 @@ static int crosec_spi_io(uint8_t *write_bytes, size_t write_size,
 		if (byte == EcFramingByte)
 			break;
 
-		// Wait 1s for a framing byte.
-		rt = current_time_from(&start);
-		if (rela_time_in_microseconds(&rt) > 1000 * 1000) {
+		if (stopwatch_expired(&sw)) {
 			printk(BIOS_ERR,
 			       "%s: Timeout waiting for framing byte.\n",
 			       __func__);