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braswell: Support added for suspend/resume and shutdown

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The current power sequencing would shutdown the system
when suspend command or reboot was initiated from the kernal.
Proper transitions from S0-S3 and S3-S0 are handled.

BUG=None
BRANCH=None
TEST=Tested on Braswell reference design. Issued
commands from kernel:For shutdown - "shutdown -P now" and
suspend - "powerd_dbus_suspend"

Change-Id: I7cc734f29c0dca89f7d9564f175895467b405df0
Signed-off-by: Divya Jyothi <divya.jyothi@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/265091
Reviewed-by: Shawn N <shawnn@chromium.org>
Commit-Queue: Eric Caruso <ejcaruso@chromium.org>
This commit is contained in:
Divya Jyothi
2015-04-09 13:37:42 -07:00
committed by ChromeOS Commit Bot
parent 6fb50e9090
commit 0086f8a780
1 changed files with 11 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
power/braswell.c
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@@ -49,8 +49,7 @@
/* All PM_SLP signals from PCH deasserted */
#define IN_ALL_PM_SLP_DEASSERTED (IN_SLP_S3_DEASSERTED | IN_SLP_S4_DEASSERTED)
/* All inputs in the right state for S0 */
#define IN_ALL_S0 (IN_PGOOD_ALWAYS_ON | IN_PGOOD_ALL_NONCORE | \
IN_PGOOD_ALL_CORE | IN_ALL_PM_SLP_DEASSERTED)
#define IN_ALL_S0 (IN_PGOOD_S0 | IN_ALL_PM_SLP_DEASSERTED)
static int throttle_cpu; /* Throttle CPU? */
static int pause_in_s5 = 1; /* Pause in S5 when shutting down? */
@@ -185,11 +184,11 @@ enum power_state power_handle_state(enum power_state state)
/*wireless_set_state(WIRELESS_ON);*/
if (power_wait_signals(IN_PGOOD_S0)) {
if (!power_has_signals(IN_PGOOD_S3)) {
chipset_force_shutdown();
/*wireless_set_state(WIRELESS_OFF);*/
return POWER_S3;
return POWER_S3S5;
}
/* Call hooks now that rails are up */
@@ -222,9 +221,8 @@ enum power_state power_handle_state(enum power_state state)
CPRINTS("power wait for PLTRST# to deassert");
while (lpc_get_pltrst_asserted()) {
usleep(MSEC);
#ifndef STRAGO_PO
i++;
#endif
i++;
if (i >= 50) {
CPRINTS("power timeout on PLTRST#");
chipset_force_shutdown();
@@ -239,12 +237,15 @@ enum power_state power_handle_state(enum power_state state)
case POWER_S0:
if (!power_has_signals(IN_PGOOD_S0)) {
/* Required rail went away - Cold Reset? */
if (!power_has_signals(IN_PGOOD_ALWAYS_ON)) {
chipset_force_shutdown();
return POWER_S0S3;
} else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) {
}
if (!power_has_signals(IN_ALL_S0)) {
/* Power down to next state */
gpio_set_level(GPIO_PCH_SYS_PWROK, 0);
return POWER_S0S3;
}