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https://github.com/Telecominfraproject/OpenCellular.git
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8b5277defe
Moved sampling of ALS to its own task. The problem is that it spin waits on the i2c bus mutex, and it's a bad idea to spin wait for very long in the hooks task because the hooks task tickles the watchdog. BUG=chrome-os-partner:29003 BRANCH=none TEST=tested on samus: make sure ALS task is running and no watchdog timeouts when the i2c bus is wedged indefinitely. Change-Id: Ifcebabdfc151ea85cecdfe7a8ed489e8a82ee5ba Signed-off-by: Alec Berg <alecaberg@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/202545 Reviewed-by: Randall Spangler <rspangler@chromium.org>
61 lines
1.2 KiB
C
61 lines
1.2 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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/* This provides the interface for any Ambient Light Sensors that are connected
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* to the EC instead of the AP.
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*/
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#include "als.h"
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#include "common.h"
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#include "console.h"
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#include "host_command.h"
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#include "task.h"
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#include "timer.h"
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#include "util.h"
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int als_read(enum als_id id, int *lux)
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{
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return als[id].read(lux);
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}
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void als_task(void)
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{
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int i, val;
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uint16_t *mapped = (uint16_t *)host_get_memmap(EC_MEMMAP_ALS);
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while (1) {
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for (i = 0; i < EC_ALS_ENTRIES && i < ALS_COUNT; i++)
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mapped[i] = als_read(i, &val) == EC_SUCCESS ? val : 0;
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task_wait_event(SECOND);
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}
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}
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/*****************************************************************************/
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/* Console commands */
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static int command_als(int argc, char **argv)
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{
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int i, rv, val;
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for (i = 0; i < ALS_COUNT; i++) {
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ccprintf("%s: ", als[i].name);
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rv = als_read(i, &val);
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switch (rv) {
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case EC_SUCCESS:
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ccprintf("%d lux\n", val);
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break;
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default:
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ccprintf("Error %d\n", rv);
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}
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}
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return EC_SUCCESS;
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}
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DECLARE_CONSOLE_COMMAND(als, command_als,
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NULL,
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"Print ALS values",
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NULL);
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