diff options
Diffstat (limited to 'board')
| -rw-r--r-- | board/cr50/board.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/board/cr50/board.c b/board/cr50/board.c index ade07be2a5..5079af1f89 100644 --- a/board/cr50/board.c +++ b/board/cr50/board.c @@ -473,10 +473,19 @@ static void configure_board_specific_gpios(void) /* Enbale the input */ GWRITE_FIELD(PINMUX, DIOM3_CTL, IE, 1); - /* Set to be edge sensitive */ - GWRITE_FIELD(PINMUX, EXITEDGE0, DIOM3, 1); - /* Select rising edge polarity */ - GWRITE_FIELD(PINMUX, EXITINV0, DIOM3, 0); + /* + * Make plt_rst_l routed to DIOM3 a low level sensitive wake + * source. This way when a plt_rst_l pulse comes along while + * H1 is in sleep, the H1 wakes from sleep first, enabling all + * necessary clocks, and becomes ready to generate an + * interrupt on the rising edge of plt_rst_l. + * + * It takes at most 150 us to wake up, and the pulse is at + * least 1ms long. + */ + GWRITE_FIELD(PINMUX, EXITEDGE0, DIOM3, 0); + GWRITE_FIELD(PINMUX, EXITINV0, DIOM3, 1); + /* Enable powerdown exit on DIOM3 */ GWRITE_FIELD(PINMUX, EXITEN0, DIOM3, 1); } else { |