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/* Copyright (c) 2013 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 "common.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "pwm.h"
#include "util.h"
#ifdef CONFIG_PWM
/**
* Print status of a PWM channel.
*
* @param ch Channel to print.
*/
static void print_channel(enum pwm_channel ch)
{
if (pwm_get_enabled(ch))
ccprintf(" %d: %d%%\n", ch, pwm_get_duty(ch));
else
ccprintf(" %d: disabled\n", ch);
}
static int cc_pwm_duty(int argc, char **argv)
{
int percent = 0;
int ch;
char *e;
if (argc < 2) {
ccprintf("PWM channels:\n");
for (ch = 0; ch < PWM_CH_COUNT; ch++)
print_channel(ch);
return EC_SUCCESS;
}
ch = strtoi(argv[1], &e, 0);
if (*e || ch < 0 || ch >= PWM_CH_COUNT)
return EC_ERROR_PARAM1;
if (argc > 2) {
percent = strtoi(argv[2], &e, 0);
if (*e || percent > 100) {
/* Bad param */
return EC_ERROR_PARAM1;
} else if (percent < 0) {
/* Negative = disable */
pwm_enable(ch, 0);
} else {
ccprintf("Setting channel %d to %d%%\n", ch, percent);
pwm_enable(ch, 1);
pwm_set_duty(ch, percent);
}
}
print_channel(ch);
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(pwmduty, cc_pwm_duty,
"[channel [<percent> | -1=disable]]",
"Get/set PWM duty cycles ",
NULL);
#endif /* CONFIG_PWM */
/* Initialize all PWM pins as functional */
static void pwm_pin_init(void)
{
gpio_config_module(MODULE_PWM, 1);
}
/* HOOK_PRIO_INIT_PWM may be used for chip PWM unit init, so use PRIO + 1 */
DECLARE_HOOK(HOOK_INIT, pwm_pin_init, HOOK_PRIO_INIT_PWM + 1);
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