diff options
| author | Bruce <Bruce.Wan@quantatw.com> | 2016-11-17 13:29:10 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-11-17 16:09:35 -0800 |
| commit | a1ec4e2d59604a22f15f9b65472c30db7a14c8c0 (patch) | |
| tree | 67f71caa3032d37216b73ba80a45b0128c5a22b1 | |
| parent | 342bf53465ae106febceab563d8159ff7ed17fd5 (diff) | |
| download | chrome-ec-a1ec4e2d59604a22f15f9b65472c30db7a14c8c0.tar.gz | |
pyro/snappy: Add force wake for PS8751.
If PS8751 goes into low power mode during sysjump, then tcpm_init will
fail since PS8751 is not accessible via I2C, so force it to wake up
during hook_init.
BUG=none
BRANCH=none
TEST=make buildall
Change-Id: I5edfef2ac4524310d4cb5485dec68999bed08210
Signed-off-by: Bruce.Wan <Bruce.Wan@quantatw.com>
Reviewed-on: https://chromium-review.googlesource.com/411646
Commit-Ready: Keith Tzeng <keith.tzeng@quantatw.com>
Tested-by: Keith Tzeng <keith.tzeng@quantatw.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
| -rw-r--r-- | board/pyro/board.c | 11 | ||||
| -rw-r--r-- | board/snappy/board.c | 11 |
2 files changed, 20 insertions, 2 deletions
diff --git a/board/pyro/board.c b/board/pyro/board.c index 38f4fa83fe..326c4b0a2c 100644 --- a/board/pyro/board.c +++ b/board/pyro/board.c @@ -317,12 +317,21 @@ void board_print_tcpc_fw_version(int port) void board_tcpc_init(void) { - int port; + int port, reg; /* Only reset TCPC if not sysjump */ if (!system_jumped_to_this_image()) board_reset_pd_mcu(); + /* + * Force PS8751 A2 to wake from low power mode. + * If PS8751 remains in low power mode after sysjump, + * TCPM_INIT will fail due to not able to access PS8751. + * + * NOTE: PS8751 A3 will wake on any I2C access. + */ + i2c_read8(NPCX_I2C_PORT0_1, 0x10, 0xA0, ®); + /* Enable TCPC0 interrupt */ gpio_enable_interrupt(GPIO_USB_C0_PD_INT_ODL); diff --git a/board/snappy/board.c b/board/snappy/board.c index f9abb27b71..6d70c8c035 100644 --- a/board/snappy/board.c +++ b/board/snappy/board.c @@ -316,12 +316,21 @@ void board_print_tcpc_fw_version(int port) void board_tcpc_init(void) { - int port; + int port, reg; /* Only reset TCPC if not sysjump */ if (!system_jumped_to_this_image()) board_reset_pd_mcu(); + /* + * Force PS8751 A2 to wake from low power mode. + * If PS8751 remains in low power mode after sysjump, + * TCPM_INIT will fail due to not able to access PS8751. + * + * NOTE: PS8751 A3 will wake on any I2C access. + */ + i2c_read8(NPCX_I2C_PORT0_1, 0x10, 0xA0, ®); + /* Enable TCPC0 interrupt */ gpio_enable_interrupt(GPIO_USB_C0_PD_INT_ODL); |