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Don't wait for CPU_CORE and VGFX_CORE good before asserting PWROK

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In addition, it's not necessary for VGFX_CORE to be enabled for the
system to be in S0; just CPU_CORE is sufficient.

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

BUG=chrome-os-partner:8725
TEST=boot system via power button; should boot normally

Change-Id: Iea32837b698845355f7fa6bd2eaca9fd95f6726b
This commit is contained in:
Randall Spangler
2012-04-03 15:23:26 -07:00
parent 95462ad4fe
commit 3d2c4f758f
1 changed files with 3 additions and 6 deletions
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9
common/x86_power.c
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@@ -80,7 +80,7 @@ static const char * const state_names[] = {
IN_PCH_SLP_An_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)
IN_PGOOD_CPU_CORE | IN_ALL_PM_SLP_DEASSERTED)
static enum x86_state state; /* Current state */
static uint32_t in_signals; /* Current input signal states (IN_PGOOD_*) */
@@ -368,13 +368,10 @@ void x86_power_task(void)
/* Wait for non-core power rails good */
wait_in_signals(IN_PGOOD_ALL_NONCORE);
/* Enable +CPU_CORE and +VGFX_CORE */
/* Enable +CPU_CORE and +VGFX_CORE regulator. The CPU
* itself will request the supplies when it's ready. */
gpio_set_level(GPIO_ENABLE_VCORE, 1);
/* Wait for all supplies good */
wait_in_signals(IN_PGOOD_ALL_NONCORE |
IN_PGOOD_ALL_CORE);
/* Wait 99ms after all voltages good */
usleep(99000);