Update the tsl2563 test.

client/site_tests/hardware_tsl2563/src/tsl2563tst.c

-// Copyright (c) 2010 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.
-
-/*
- * TSL2563 light sensor functional test
- *
- * When I spoof an I2C device on i2c adapter 0, I see these files show
- * up in /sys/devices/pci0000:00/0000:00:02.0/i2c-0/0-0029/iio/device0:
- *  -r--r--r-- 1 root root 4096 Mar 25 17:21 adc0
- *  -r--r--r-- 1 root root 4096 Mar 25 17:21 adc1
- *  -rw-r--r-- 1 root root 4096 Mar 25 17:21 calib0
- *  -rw-r--r-- 1 root root 4096 Mar 25 17:21 calib1
- *  lrwxrwxrwx 1 root root    0 Mar 25 17:21 device -> ../../../0-0029
- *  -r--r--r-- 1 root root 4096 Mar 25 17:21 lux
- *  drwxr-xr-x 2 root root    0 Mar 25 17:21 power
- *  lrwxrwxrwx 1 root root    0 Mar 25 17:21 subsystem -> ../../../../../../../class/iio
- *  -rw-r--r-- 1 root root 4096 Mar 25 17:21 uevent
- * This is done with:
- *   echo tsl2563 0x29 > /sys/class/i2c-adapter/i2c-0/new_device
- *
- * Raw and calibrated ADC data come from adc{0|1} and calib{0|1}, but
- * it is probably best to use the lux file because it gives the calibrated
- * ADC translated to luminescence.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#define _GNU_SOURCE
-#include <getopt.h>
-
-
-/*
- * The "lux" sysfs file gives luminescence data with a "%d" printf.
- * I do not yet know the range of expected values.
- */
-int lux_read(FILE *lux_fp, int *luxp)
-{
-  int rval;
-
-  rval = fscanf(lux_fp, "%d", luxp);
-  
-  if (rval != 1) {
-    printf("Failed to read an integer from the lux file.\n");
-    return -1;
-  }
-  return 0;
-}
-
-void repeated_lux_read(FILE *lux_fp, int us_period)
-{
-  int lux;
-
-  while (lux_read(lux_fp, &lux) == 0) {
-    printf("lux: %d\n", lux);
-    usleep(us_period);
-  }
-}
-
-struct option long_options[] = {
-  {"file", 1, 0, 'f'},
-  {"repeat", 0, 0, 'r'},
-  {"period", 1, 0, 'p'},
-  {"help", 0, 0, 'h'},
-  {0, 0, 0, 0}
-};
-
-int opt_repeat = 0;
-int opt_period_usecs = 500000;
-char *opt_file = "/sys/devices/pci0000:00/0000:00:02.0/i2c-0/0-0029/iio/device0/lux";
-
-void print_help(void)
-{
-  printf("Usage: tsl2563tst [options]\n");
-  printf("       will read the tsl2563 light sensor sysfs file.\n");
-  printf("  options:\n");
-  printf("  --file <file>: explicitly specify the sysfs light sensor file\n");
-  printf("  --repeat: repeatedly read light sensor data\n");
-  printf("  --period <usecs>: set the period between repeated reads\n");
-  printf("  --help: print this help message\n");
-}
-
-
-int main(int argc, char *argv[])
-{
-  int c;
-
-  while ((c = getopt_long(argc, argv, "hf:p:r", long_options, NULL)) != -1) {
-    switch (c) {
-    case 'h':
-      print_help();
-      exit(0);
-    case 'f':
-      opt_file = optarg;
-      break;
-    case 'p':
-      opt_period_usecs = atoi(optarg);
-      break;
-    case 'r':
-      opt_repeat = 1;
-      break;
-    case '?':
-      print_help();
-      exit(1);
-    default:
-      printf("Unknown parameter 0x%x.\n", c);
-      exit(1);
-    }
-  }
-
-  FILE *lux_fp;
-  lux_fp = fopen(opt_file, "r");
-  if (lux_fp == NULL) {
-    perror("open device file");
-    fprintf(stderr, "Cannot open %s.\n", opt_file);
-    fprintf(stderr, "Perhaps the tsl2563 module is not loaded.\n"
-      "Or perhaps the kernel needs to be told where to find the device.\n"
-        "(eg, 'echo tsl2563 0x29 > /sys/class/i2c-adapter/i2c-0/new_device'\n");
-    exit(1);
-  }
-
-  if (opt_repeat) {
-    repeated_lux_read(lux_fp, opt_period_usecs);
-  } else {
-    int lux;
-    if (lux_read(lux_fp, &lux) != 0)
-      exit(1);
-    printf("lux: %d\n", lux);
-  }
-  return 0;
-}