This patch adds API's to reset and shutdown the power of EXYNOS boards power_shutdown: powers off the board by deasserting PS_HOLD pin. power_reset: this function software resets the Exynos board when called.
Signed-off-by: Che-Liang Chiou clchiou@chromium.org Signed-off-by: Rajeshwari Shinde rajeshwari.s@samsung.com --- arch/arm/cpu/armv7/exynos/power.c | 31 ++++++++++++++++++++++++++++++ arch/arm/include/asm/arch-exynos/power.h | 10 +++++++++ 2 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c index 6375a81..2b65bbe 100644 --- a/arch/arm/cpu/armv7/exynos/power.c +++ b/arch/arm/cpu/armv7/exynos/power.c @@ -113,6 +113,25 @@ void set_ps_hold_ctrl(void) }
+void exynos5_power_shutdown(void) +{ + struct exynos5_power *power = + (struct exynos5_power *)samsung_get_base_power(); + + clrbits_le32(&power->ps_hold_control, EXYNOS_PS_HOLD_CONTROL_DATA_HIGH); +} + +void exynos5_power_reset(void) +{ + struct exynos5_power *power = + (struct exynos5_power *)samsung_get_base_power(); + + /* Clear inform1 so there's no change we think we've got a wake reset */ + power->inform1 = 0; + + setbits_le32(&power->swreset, 1); +} + static void exynos5_set_xclkout(void) { struct exynos5_power *power = @@ -140,3 +159,15 @@ void set_hw_thermal_trip(void) setbits_le32(&power->ps_hold_control, POWER_ENABLE_HW_TRIP); } } + +void power_shutdown(void) +{ + if (cpu_is_exynos5()) + exynos5_power_shutdown(); +} + +void power_reset(void) +{ + if (cpu_is_exynos5()) + exynos5_power_reset(); +} diff --git a/arch/arm/include/asm/arch-exynos/power.h b/arch/arm/include/asm/arch-exynos/power.h index 3549667..6844e0f 100644 --- a/arch/arm/include/asm/arch-exynos/power.h +++ b/arch/arm/include/asm/arch-exynos/power.h @@ -888,4 +888,14 @@ void set_ps_hold_ctrl(void); * source as XXTI */ void set_xclkout(void); + +/* + * Power off the system; it should never return. + */ +void power_shutdown(void); + +/* + * Perform a software reset. + */ +void power_reset(void); #endif