diff options
| author | Simon Glass <sjg@chromium.org> | 2016-06-10 20:58:24 -0600 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-06-24 20:22:52 +0200 |
| commit | 786593248121951e460b21f97d18783b834c938a (patch) | |
| tree | 07291fd4d5e0c5938aeb57acadc5dddaae709afd /src/ec | |
| parent | 2cf99e1655ea2f10bcd5a0f494bbad4db4d46bee (diff) | |
| download | coreboot-786593248121951e460b21f97d18783b834c938a.tar.xz | |
ec/google: Add support for the EC 'get time' function
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>
Diffstat (limited to 'src/ec')
| -rw-r--r-- | src/ec/google/chromeec/Kconfig | 7 | ||||
| -rw-r--r-- | src/ec/google/chromeec/ec.c | 21 |
2 files changed, 28 insertions, 0 deletions
diff --git a/src/ec/google/chromeec/Kconfig b/src/ec/google/chromeec/Kconfig index 2e4affc975..0e1b4f244c 100644 --- a/src/ec/google/chromeec/Kconfig +++ b/src/ec/google/chromeec/Kconfig @@ -98,3 +98,10 @@ config EC_GOOGLE_CHROMEEC_PD_BOARDNAME The board name used in the Chrome EC code base to build the PD firmware. If set, the coreboot build with also build the EC firmware and add it to the image. + +config EC_GOOGLE_CHROMEEC_RTC + depends on EC_GOOGLE_CHROMEEC + bool "Enable Chrome OS EC RTC" + help + Enable support for the real-time clock on the Chrome OS EC. This + uses the EC_CMD_RTC_GET_VALUE command to read the current time. diff --git a/src/ec/google/chromeec/ec.c b/src/ec/google/chromeec/ec.c index 87ab13acec..1a381d716e 100644 --- a/src/ec/google/chromeec/ec.c +++ b/src/ec/google/chromeec/ec.c @@ -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) |