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43806f07e3
This adds a sensor-specific attentuation factor, which will be applied to the ALS raw sensor readings on the EC. This is to account for the attenutation due to glass, tinting, etc. BUG=chrome-os-partner:34590 BRANCH=ToT,Samus TEST=manual In a root shell, run this: cd /sys/bus/acpi/drivers/acpi_als/ACPI0008:00/iio:device1 while true; do cat in_illuminance_raw; sleep 1 ;done Shine a flashlight on the ALS. Note that the readings are 5X higher than they were before this CL. Change-Id: I2a53872ecb5fab62e5f443d43588a26d3d7e697f Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/241191 Reviewed-by: Bryan Freed <bfreed@chromium.org>
62 lines
1.3 KiB
C
62 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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/* 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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int af = als[id].attenuation_factor;
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return als[id].read(lux, af);
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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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