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ec/google: Add support for the EC 'get time' function

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Some platforms have an RTC provided by the Chrome OS EC. Allow the EC to
implement rtc_get() so that this can be plumbed in.

BUG=chrome-os-partner:52220
BRANCH=none
TEST=(partial) with future commits, boot on gru and see output:
Date: 1970-01-17 (Saturday)  Time:  1:42:44

Then reboot ~10 seconds later and see output:
Date: 1970-01-17 (Saturday)  Time:  1:42:53

Change-Id: I3b38f23b259837cdd4bd99167961b7bd245683b3
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 4a4a26da37323c9ac33030c8f1510efae5ac2505
Original-Change-Id: Icaa381d32517dfed8d3b7927495b67a027d5ceea
Original-Signed-off-by: Simon Glass <sjg@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/351780
Original-Commit-Ready: Vadim Bendebury <vbendeb@chromium.org>
Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/15302
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Simon Glass
2016-06-10 20:58:24 -06:00
committed by Martin Roth
parent 2cf99e1655
commit 7865932481
2 changed files with 28 additions and 0 deletions
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21
src/ec/google/chromeec/ec.c
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@@ -22,6 +22,7 @@
#include <halt.h>
#include <reset.h>
#include <elog.h>
#include <rtc.h>
#include <stdlib.h>
#include "chip.h"
@@ -142,6 +143,26 @@ int google_chromeec_check_feature(int feature)
return r.flags[feature / 32] & EC_FEATURE_MASK_0(feature);
}
#if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC_RTC)
int rtc_get(struct rtc_time *time)
{
struct chromeec_command cmd;
struct ec_response_rtc r;
cmd.cmd_code = EC_CMD_RTC_GET_VALUE;
cmd.cmd_version = 0;
cmd.cmd_size_in = 0;
cmd.cmd_data_out = &r;
cmd.cmd_size_out = sizeof(r);
cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cmd) != 0)
return -1;
return rtc_to_tm(r.time, time);
}
#endif
#ifndef __SMM__
#ifdef __PRE_RAM__
void google_chromeec_check_ec_image(int expected_type)