Drop DPWROK when system is off for more than 10 secrelease-R20-2268.B

This saves ~70mw of power.

To make this work, I also had to stretch the power button signal to
give the system a chance to come back up when the user taps the power
button.

Signed-off-by: Randall Spangler <rspangler@chromium.org>

BUG=chrome-os-partner:9574
TEST=manual

For each of the following tests, wait ~15 sec after the system is
powered off to give it a chance to drop DPWROK.

1) tap power button -> system turns on
2) hold power button 1 sec -> system turns on
3) open lid -> system turns on
4) silego reset (power+refresh, or power+esc on proto1) -> system stays off
5) silego recovery (power+esc+refresh) -> system turns on
6) hold down power button and type 'reboot' on EC console -> system turns on
7) type 'powerbtn' on EC console -> system turns on

Change-Id: I781cf3e665104192521b7fb9ff75a3c3e7f43464

1 files changed, 6 insertions, 1 deletions

diff --git a/board/bds/board.c b/board/bds/board.c
index 777e84c3e5..89bd337af3 100644
--- a/board/bds/board.c
+++ b/board/bds/board.c
@@ -86,12 +86,17 @@ const struct gpio_info gpio_list[GPIO_COUNT] = {
 /* BDS system is only half-wired to an x86 chipset, so it can't tell what state
  * the chipset is in.  Rather than scatter ifdef's everywhere, put a mock
  * chipset interface here. */
-int chipset_in_state(enum chipset_state in_state)
+int chipset_in_state(int state_mask)
 {
 	return 1;  /* Sure, I'm in whatever state you want. */
 }
 
 
+void chipset_exit_hard_off(void)
+{
+}
+
+
 void configure_board(void)
 {
 }