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device: convert to stopwatch API 

Instead of open coding the monotonic timers use the stopwatch
abstraction.

BUG=None
BRANCH=None
TEST=Booted and noted timings work as expected. Built with software_i2c
     and no compilation failures.

Change-Id: Ie5ecdd5bc764c1ab8ba4a923e65a1666aacd22f7
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: c7bffb5aeb41e9b88cd2c99edd6abc38f1dc90af
Original-Change-Id: I0170fe4b93d9976957a2dcb00a6ea41ddc0320ce
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/219495
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/8817
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Aaron Durbin 2014-09-23 16:34:40 -05:00 committed by Patrick Georgi
parent ad5a909740
commit 46ba4807e9
2 changed files with 9 additions and 11 deletions
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9
src/device/device.c
View File

@ -1139,10 +1139,8 @@ static void init_dev(struct device *dev)
if (!dev->initialized && dev->ops && dev->ops->init) {
#if CONFIG_HAVE_MONOTONIC_TIMER
struct mono_time start_time;
struct rela_time dev_init_time;
timer_monotonic_get(&start_time);
struct stopwatch sw;
stopwatch_init(&sw);
#endif
if (dev->path.type == DEVICE_PATH_I2C) {
printk(BIOS_DEBUG, "smbus: %s[%d]->",
@ -1153,9 +1151,8 @@ static void init_dev(struct device *dev)
dev->initialized = 1;
dev->ops->init(dev);
#if CONFIG_HAVE_MONOTONIC_TIMER
dev_init_time = current_time_from(&start_time);
printk(BIOS_DEBUG, "%s init %ld usecs\n", dev_path(dev),
rela_time_in_microseconds(&dev_init_time));
stopwatch_duration_usecs(&sw));
#endif
}
}

11
src/device/software_i2c.c
View File

@ -44,20 +44,21 @@ static int __wait(unsigned bus, int timeout_us, int for_scl)
int us;
int sda = software_i2c[bus]->get_sda(bus);
int scl = software_i2c[bus]->get_scl(bus);
struct mono_time start;
timer_monotonic_get(&start);
struct stopwatch sw;
stopwatch_init_usecs_expire(&sw, timeout_us);
do {
int old_sda = sda;
int old_scl = scl;
struct rela_time diff = current_time_from(&start);
us = rela_time_in_microseconds(&diff);
us = stopwatch_duration_usecs(&sw);
if (old_sda != (sda = software_i2c[bus]->get_sda(bus)))
spew("[SDA transitioned to %d after %dus] ", sda, us);
if (old_scl != (scl = software_i2c[bus]->get_scl(bus)))
spew("[SCL transitioned to %d after %dus] ", scl, us);
} while (us < timeout_us && (!for_scl || !scl));
} while (!stopwatch_expired(&sw) && (!for_scl || !scl));
return scl;
}