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/* Copyright 2021 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gpio.h"
#include "hooks.h"
#include "power/icelake.h"
#include "throttle_ap.h"
/*
* PWROK signal configuration, see the PWROK Generation Flow Diagram (Figure
* 235) in the Tiger Lake Platform Design Guide for the list of potential
* signals.
*
* Volteer uses this power sequence:
* GPIO_EN_PPVAR_VCCIN - Turns on the VCCIN rail. Also used as a delay to
* the VCCST_PWRGD input to the AP so this signal must be delayed
* 5 ms to meet the tCPU00 timing requirement.
* GPIO_EC_PCH_SYS_PWROK - Asserts the SYS_PWROK input to the AP. Delayed
* a total of 50 ms after ALL_SYS_PWRGD input is asserted. See
* b/144478941 for full discussion.
*
* Volteer does not provide direct EC control for the VCCST_PWRGD and PCH_PWROK
* signals. If your board adds these signals to the EC, copy this array
* to your board.c file and modify as needed.
*/
const struct intel_x86_pwrok_signal pwrok_signal_assert_list[] = {
{
.gpio = GPIO_EN_PPVAR_VCCIN,
.delay_ms = 5,
},
{
.gpio = GPIO_EC_PCH_SYS_PWROK,
.delay_ms = 50 - 5,
},
};
const int pwrok_signal_assert_count = ARRAY_SIZE(pwrok_signal_assert_list);
const struct intel_x86_pwrok_signal pwrok_signal_deassert_list[] = {
/* No delays needed during S0 exit */
{
.gpio = GPIO_EC_PCH_SYS_PWROK,
},
/* Turn off VCCIN last */
{
.gpio = GPIO_EN_PPVAR_VCCIN,
},
};
const int pwrok_signal_deassert_count = ARRAY_SIZE(pwrok_signal_deassert_list);
static const struct prochot_cfg volteer_prochot_cfg = {
.gpio_prochot_in = GPIO_EC_PROCHOT_IN_L,
#ifdef CONFIG_CPU_PROCHOT_GATE_ON_C10
.gpio_c10_in = GPIO_CPU_C10_GATE_L,
.c10_active_high = false,
#endif
};
static void baseboard_init(void)
{
/* Enable monitoring of the PROCHOT input to the EC */
throttle_ap_config_prochot(&volteer_prochot_cfg);
gpio_enable_interrupt(GPIO_EC_PROCHOT_IN_L);
#ifdef CONFIG_CPU_PROCHOT_GATE_ON_C10
gpio_enable_interrupt(GPIO_CPU_C10_GATE_L);
#endif
}
DECLARE_HOOK(HOOK_INIT, baseboard_init, HOOK_PRIO_DEFAULT);
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