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power/rk3399: Implement chipset reset / shutdown routines

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Implement warm reset and force shutdown routines, which are called from
other modules.

BUG=chrome-os-partner:51926, chrome-os-partner:51923
BRANCH=None
TEST=Verify 'apshutdown' on EC console goes to G3. Verify 'apreset'
causes AP reset while staying in S0.

Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Change-Id: Ifb479287f87f31ac49e007c337cc0c24a79898e6
Reviewed-on: https://chromium-review.googlesource.com/338923
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
This commit is contained in:
Shawn Nematbakhsh
2016-04-13 16:31:25 -07:00
committed by chrome-bot
parent 533a536140
commit a393475730
1 changed files with 15 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
power/rk3399.c
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@@ -60,7 +60,7 @@ static const struct power_signal_info power_control_outputs[] = {
{ GPIO_SYS_RST_L, 0 },
};
static int want_s0_exit;
static int forcing_shutdown;
void chipset_force_shutdown(void)
{
@@ -70,13 +70,19 @@ void chipset_force_shutdown(void)
* Force power off. This condition will reset once the state machine
* transitions to G3.
*/
/* TODO: Implement */
forcing_shutdown = 1;
task_wake(TASK_ID_CHIPSET);
}
void chipset_reset(int cold_reset)
{
/* TODO: implement */
/* TODO: handle cold_reset */
CPRINTS("%s(%d)", __func__, cold_reset);
/* Pulse SYS_RST */
gpio_set_level(GPIO_SYS_RST_L, 0);
udelay(10);
gpio_set_level(GPIO_SYS_RST_L, 1);
}
enum power_state power_chipset_init(void)
@@ -103,23 +109,25 @@ enum power_state power_handle_state(enum power_state state)
break;
case POWER_S5:
if (want_s0_exit)
if (forcing_shutdown)
return POWER_S5G3;
else
return POWER_S5S3;
case POWER_S3:
if (want_s0_exit)
if (forcing_shutdown)
return POWER_S3S5;
else
return POWER_S3S0;
case POWER_S0:
if (want_s0_exit)
if (forcing_shutdown)
return POWER_S0S3;
break;
case POWER_G3S5:
forcing_shutdown = 0;
/* Power up to next state */
return POWER_S5;
@@ -212,7 +220,6 @@ enum power_state power_handle_state(enum power_state state)
return POWER_S5;
case POWER_S5G3:
want_s0_exit = 0;
/* Initialize power signal outputs to default. */
return power_chipset_init();
}
@@ -230,7 +237,7 @@ static void power_button_changed(void)
/* Power up */
chipset_exit_hard_off();
else
want_s0_exit = 1;
forcing_shutdown = 1;
task_wake(TASK_ID_CHIPSET);
}