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051ebe3228
Add an 'adc' cli command to get information from adc devices and to read "single shot" data. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
121 lines
2.5 KiB
C
121 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018 BayLibre, SAS
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* Author: Neil Armstrong <narmstrong@baylibre.com>
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*/
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#include <common.h>
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#include <command.h>
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#include <dm.h>
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#include <adc.h>
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static int do_adc_list(cmd_tbl_t *cmdtp, int flag, int argc,
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char *const argv[])
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{
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struct udevice *dev;
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int ret;
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ret = uclass_first_device_err(UCLASS_ADC, &dev);
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if (ret) {
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printf("No available ADC device\n");
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return CMD_RET_FAILURE;
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}
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do {
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printf("- %s\n", dev->name);
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ret = uclass_next_device(&dev);
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if (ret)
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return CMD_RET_FAILURE;
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} while (dev);
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return CMD_RET_SUCCESS;
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}
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static int do_adc_info(cmd_tbl_t *cmdtp, int flag, int argc,
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char *const argv[])
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{
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struct udevice *dev;
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unsigned int data_mask;
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int ret, vss, vdd;
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if (argc < 2)
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return CMD_RET_USAGE;
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ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
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if (ret) {
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printf("Unknown ADC device %s\n", argv[1]);
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return CMD_RET_FAILURE;
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}
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printf("ADC Device '%s' :\n", argv[1]);
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ret = adc_data_mask(dev, &data_mask);
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if (!ret)
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printf("data mask: %x\n", data_mask);
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ret = adc_vdd_value(dev, &vdd);
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if (!ret)
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printf("vdd: %duV\n", vdd);
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ret = adc_vss_value(dev, &vss);
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if (!ret)
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printf("vss: %duV\n", vss);
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return CMD_RET_SUCCESS;
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}
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static int do_adc_single(cmd_tbl_t *cmdtp, int flag, int argc,
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char *const argv[])
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{
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unsigned int data;
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int ret;
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if (argc < 3)
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return CMD_RET_USAGE;
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ret = adc_channel_single_shot(argv[1], simple_strtol(argv[2], NULL, 0),
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&data);
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if (ret) {
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printf("Error getting single shot for device %s channel %s\n",
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argv[1], argv[2]);
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return CMD_RET_FAILURE;
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}
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printf("%u\n", data);
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return CMD_RET_SUCCESS;
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}
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static cmd_tbl_t cmd_adc_sub[] = {
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U_BOOT_CMD_MKENT(list, 1, 1, do_adc_list, "", ""),
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U_BOOT_CMD_MKENT(info, 2, 1, do_adc_info, "", ""),
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U_BOOT_CMD_MKENT(single, 3, 1, do_adc_single, "", ""),
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};
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static int do_adc(cmd_tbl_t *cmdtp, int flag, int argc,
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char *const argv[])
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{
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cmd_tbl_t *c;
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if (argc < 2)
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return CMD_RET_USAGE;
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/* Strip off leading 'adc' command argument */
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argc--;
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argv++;
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c = find_cmd_tbl(argv[0], &cmd_adc_sub[0], ARRAY_SIZE(cmd_adc_sub));
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if (c)
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return c->cmd(cmdtp, flag, argc, argv);
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else
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return CMD_RET_USAGE;
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}
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static char adc_help_text[] =
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"list - list ADC devices\n"
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"adc info <name> - Get ADC device info\n"
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"adc single <name> <channel> - Get Single data of ADC device channel";
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U_BOOT_CMD(adc, 4, 1, do_adc, "ADC sub-system", adc_help_text);
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