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| author | Randall Spangler <rspangler@chromium.org> | 2016-08-05 10:25:42 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-09-24 13:53:26 -0700 |
| commit | b94747d501ad7e4347b50c3ea55e615422d96212 (patch) | |
| tree | b2c078ca5b87a8af29827474789475903f5b316f /board/cr50/board.c | |
| parent | 5fa727805ca3222e9268755c54c15bbf87c5b2bd (diff) | |
| download | chrome-ec-b94747d501ad7e4347b50c3ea55e615422d96212.tar.gz | |
cr50: reset only the TPM state on SYS_RST_L
Rather than doing a full cr50 reset when the system reset SYS_RST_L is
asserted, just reset the state of the TPM task and library. Re-clear
.bss for those modules, then re-initialize.
BRANCH=none
BUG=chrome-os-partner:52366
CQ-DEPEND=CL:366792
TEST=make buildall; test on Gru
Trigger a SYS_RST_L by using the AP's reboot command, power
off/on, log in/out/in.
See that the Cr50 does not reboot and the firmware and userspace
are still happy about the TPM.
Change-Id: I32cd2bb72316f68c74db77a20a8d09112b402d4b
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/361680
Diffstat (limited to 'board/cr50/board.c')
| -rw-r--r-- | board/cr50/board.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/board/cr50/board.c b/board/cr50/board.c index 3f365350da..31a8d2fef1 100644 --- a/board/cr50/board.c +++ b/board/cr50/board.c @@ -394,8 +394,8 @@ void sys_rst_asserted(enum gpio_signal signal) if (usb_spi_update_in_progress() || is_sys_rst_asserted()) return; - cflush(); - system_reset(0); + /* Re-initialize the TPM software state */ + task_set_event(TASK_ID_TPM, TPM_EVENT_RESET, 0); } void assert_sys_rst(void) |