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/* Copyright 2022 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <sys/atomic.h>
#include <logging/log.h>
#include <power_signals.h>
#include <signal_adc.h>
#include "drivers/sensor.h"
#define MY_COMPAT intel_ap_pwrseq_adc
#if HAS_ADC_SIGNALS
LOG_MODULE_DECLARE(ap_pwrseq, CONFIG_AP_PWRSEQ_LOG_LEVEL);
struct adc_config {
const struct device *dev_trig_high;
const struct device *dev_trig_low;
enum power_signal signal;
};
#define INIT_ADC_CONFIG(id) \
{ \
.dev_trig_high = DEVICE_DT_GET(DT_PHANDLE(id, trigger_high)), \
.dev_trig_low = DEVICE_DT_GET(DT_PHANDLE(id, trigger_low)), \
.signal = PWR_SIGNAL_ENUM(id), \
},
static const struct adc_config config[] = {
DT_FOREACH_STATUS_OKAY(MY_COMPAT, INIT_ADC_CONFIG)
};
static atomic_t value[ARRAY_SIZE(config)];
static void trigger_high(enum pwr_sig_adc adc)
{
struct sensor_value val;
atomic_set_bit(&value[adc], 0);
val.val1 = false;
sensor_attr_set(config[adc].dev_trig_high,
SENSOR_CHAN_VOLTAGE,
SENSOR_ATTR_ALERT,
&val);
val.val1 = true;
sensor_attr_set(config[adc].dev_trig_low,
SENSOR_CHAN_VOLTAGE,
SENSOR_ATTR_ALERT,
&val);
LOG_DBG("power signal adc%d is HIGH", adc);
power_signal_interrupt(config[adc].signal, 1);
}
static void trigger_low(enum pwr_sig_adc adc)
{
struct sensor_value val;
atomic_clear_bit(&value[adc], 0);
val.val1 = false;
sensor_attr_set(config[adc].dev_trig_low,
SENSOR_CHAN_VOLTAGE,
SENSOR_ATTR_ALERT,
&val);
val.val1 = true;
sensor_attr_set(config[adc].dev_trig_high,
SENSOR_CHAN_VOLTAGE,
SENSOR_ATTR_ALERT,
&val);
LOG_DBG("power signal adc%d is LOW", adc);
power_signal_interrupt(config[adc].signal, 0);
}
int power_signal_adc_get(enum pwr_sig_adc adc)
{
if (adc < 0 || adc >= ARRAY_SIZE(config)) {
return -EINVAL;
}
return !!value[adc];
}
/*
* Macros to create individual callbacks for
* high and low triggers for each ADC.
*/
#define TAG_ADC(tag, name) DT_CAT(tag, name)
#define PWR_ADC_ENUM(id) TAG_ADC(PWR_SIG_TAG_ADC, PWR_SIGNAL_ENUM(id))
#define ADC_CB(id, lev) cb_##lev##_##id
#define ADC_CB_DEFINE(id, lev) \
static void ADC_CB(id, lev)(const struct device *dev, \
const struct sensor_trigger *trigger) \
{ \
trigger_##lev(PWR_ADC_ENUM(id)); \
}
DT_FOREACH_STATUS_OKAY_VARGS(MY_COMPAT, ADC_CB_DEFINE, high)
DT_FOREACH_STATUS_OKAY_VARGS(MY_COMPAT, ADC_CB_DEFINE, low)
#define ADC_CB_COMMA(id, lev) ADC_CB(id, lev),
void power_signal_adc_init(void)
{
struct sensor_trigger trig = {
.type = SENSOR_TRIG_THRESHOLD,
.chan = SENSOR_CHAN_VOLTAGE
};
struct sensor_value val;
sensor_trigger_handler_t low_cb[] = {
DT_FOREACH_STATUS_OKAY_VARGS(MY_COMPAT, ADC_CB_COMMA, low)
};
sensor_trigger_handler_t high_cb[] = {
DT_FOREACH_STATUS_OKAY_VARGS(MY_COMPAT, ADC_CB_COMMA, high)
};
int i;
for (i = 0; i < ARRAY_SIZE(low_cb); i++) {
/* Set high and low trigger callbacks */
sensor_trigger_set(config[i].dev_trig_high, &trig, high_cb[i]);
sensor_trigger_set(config[i].dev_trig_low, &trig, low_cb[i]);
/* Enable high trigger callback only */
val.val1 = true;
sensor_attr_set(config[i].dev_trig_high,
SENSOR_CHAN_VOLTAGE,
SENSOR_ATTR_ALERT,
&val);
}
}
#endif /* HAS_ADC_SIGNALS */
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