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https://github.com/Telecominfraproject/OpenCellular.git
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ff8c8fee79
Rambi has a pair of LEDs which are attached to the PWM fan controller.
Add support for them. Also add a generic 'pwmduty' command which can
be used to get/set the duty cycle for any PWM channel.
Also fix rounding errors in pwm module, so that set/get duty doesn't
keep rounding down.
BUG=chrome-os-partner:22895
BRANCH=none
TEST=Boot rambi. LEDs are off.
pwmduty -> both are 0%
pwmduty 0 10 -> green LED on dimly
pwmduty 1 10 -> red LED on dimly
pwmduty 0 99 -> green LED on brightly
pwmduty 1 100 -> red LED on brightly
pwmduty 1 0 -> red LED off
pwmduty 1 -1 -> red LED turns back on because fan controller is disabled
pwmduty -> channel 0 at 99%, channel 1 disabled
Build all platforms. Pass all unit tests.
Change-Id: Ib0a6289a757554e696a9a0153a85bdc34e2ee2ae
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/172094
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "common.h"
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#include "console.h"
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#include "pwm.h"
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#include "util.h"
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/**
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* Print status of a PWM channel.
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*
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* @param ch Channel to print.
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*/
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static void print_channel(enum pwm_channel ch)
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{
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if (pwm_get_enabled(ch))
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ccprintf(" %d: %d%%\n", ch, pwm_get_duty(ch));
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else
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ccprintf(" %d: disabled\n", ch);
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}
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static int cc_pwm_duty(int argc, char **argv)
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{
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int percent = 0;
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int ch;
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char *e;
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if (argc < 2) {
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ccprintf("PWM channels:\n");
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for (ch = 0; ch < PWM_CH_COUNT; ch++)
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print_channel(ch);
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return EC_SUCCESS;
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}
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ch = strtoi(argv[1], &e, 0);
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if (*e || ch < 0 || ch >= PWM_CH_COUNT)
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return EC_ERROR_PARAM1;
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if (argc > 2) {
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percent = strtoi(argv[2], &e, 0);
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if (*e || percent > 100) {
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/* Bad param */
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return EC_ERROR_PARAM1;
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} else if (percent < 0) {
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/* Negative = disable */
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pwm_enable(ch, 0);
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} else {
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ccprintf("Setting channel %d to %d%%\n", ch, percent);
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pwm_enable(ch, 1);
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pwm_set_duty(ch, percent);
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}
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}
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print_channel(ch);
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return EC_SUCCESS;
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}
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DECLARE_CONSOLE_COMMAND(pwmduty, cc_pwm_duty,
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"[channel [<percent> | -1=disable]]",
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"Get/set PWM duty cycles ",
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NULL);
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