coreboot-kgpe-d16/src/soc/samsung/exynos5420/power.c

/* SPDX-License-Identifier: GPL-2.0-only */

/* Power setup code for EXYNOS5 */

#include <device/mmio.h>
#include <halt.h>
#include <soc/dmc.h>
#include <soc/power.h>
#include <soc/setup.h>

/* Set the PS-Hold drive value */
static void ps_hold_setup(void)
{
	/* Set PS-Hold high */
	setbits32(&exynos_power->ps_hold_ctrl,
		     POWER_PS_HOLD_CONTROL_DATA_HIGH);
}

void power_reset(void)
{
	/* Clear inform1 so there's no change we think we've got a wake reset */
	exynos_power->inform1 = 0;

	setbits32(&exynos_power->sw_reset, 1);
}

/* This function never returns */
void power_shutdown(void)
{
	clrbits32(&exynos_power->ps_hold_ctrl,
		     POWER_PS_HOLD_CONTROL_DATA_HIGH);

	halt();
}

void power_enable_dp_phy(void)
{
	setbits32(&exynos_power->dptx_phy_control, EXYNOS_DP_PHY_ENABLE);
}

void power_enable_hw_thermal_trip(void)
{
	/* Enable HW thermal trip */
	setbits32(&exynos_power->ps_hold_ctrl, POWER_ENABLE_HW_TRIP);
}

uint32_t power_read_reset_status(void)
{
	return exynos_power->inform1;
}

void power_exit_wakeup(void)
{
	typedef void (*resume_func)(void);

	((resume_func)exynos_power->inform0)();
}

int power_init(void)
{
	ps_hold_setup();
	return 0;
}

void power_enable_xclkout(void)
{
	/* use xxti for xclk out */
	clrsetbits32(&exynos_power->pmu_debug, PMU_DEBUG_CLKOUT_SEL_MASK,
			PMU_DEBUG_XXTI);
}

void power_release_uart_retention(void)
{
	write32(&exynos_power->padret_uart_opt, 1 << 28);
}