diff options
| -rw-r--r-- | power/tegra.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/power/tegra.c b/power/tegra.c index e865011bc3..83dc47bd58 100644 --- a/power/tegra.c +++ b/power/tegra.c @@ -143,6 +143,23 @@ static int wait_in_signal(enum gpio_signal signal, int value, int timeout) } /** + * Set the AP RESET signal. + * + * This fucntion is for backward-compatible. + * + * AP_RESET_L (PB3) is stuffed before rev <= 2.0 and connected to PMIC RESET. + * After rev >= 2.2, this is removed. This should not effected the new board. + * + * @param asserted Assert (=1) or deassert (=0) the signal. This is the + * logical level of the pin, not the physical level. + */ +static void set_ap_reset(int asserted) +{ + /* Signal is active-low */ + gpio_set_level(GPIO_AP_RESET_L, asserted ? 0 : 1); +} + +/** * Set the PMIC PWRON signal. * * Note that asserting requires holding for PMIC_PWRON_DEBOUNCE_TIME. @@ -368,6 +385,9 @@ void chipset_force_shutdown(void) set_pmic_therm(1); udelay(PMIC_THERM_HOLD_TIME); set_pmic_therm(0); + + /* Hold the reset pin so that the AP stays in off mode (rev <= 2.0) */ + set_ap_reset(1); } /*****************************************************************************/ @@ -421,8 +441,9 @@ static int check_for_power_on_event(void) */ static int power_on(void) { - /* Make sure we de-assert the PMI_THERM_L pin. */ + /* Make sure we de-assert the PMI_THERM_L and AP_RESET_L pin. */ set_pmic_therm(0); + set_ap_reset(0); /* Push the power button */ set_pmic_pwron(1); |