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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
*/
#include <command.h>
#include <dm.h>
#include <adc.h>
#include <linux/printk.h>
static int do_adc_list(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct udevice *dev;
int ret, err;
ret = err = uclass_first_device_check(UCLASS_ADC, &dev);
while (dev) {
printf("- %s status: %i\n", dev->name, ret);
ret = uclass_next_device_check(&dev);
if (ret)
err = ret;
}
return err ? CMD_RET_FAILURE : CMD_RET_SUCCESS;
}
static int do_adc_info(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct udevice *dev;
unsigned int data_mask, ch_mask;
int ret, vss, vdd;
if (argc < 2)
return CMD_RET_USAGE;
ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
if (ret) {
printf("Unknown ADC device %s\n", argv[1]);
return CMD_RET_FAILURE;
}
printf("ADC Device '%s' :\n", argv[1]);
ret = adc_channel_mask(dev, &ch_mask);
if (!ret)
printf("channel mask: %x\n", ch_mask);
ret = adc_data_mask(dev, &data_mask);
if (!ret)
printf("data mask: %x\n", data_mask);
ret = adc_vdd_value(dev, &vdd);
if (!ret)
printf("vdd: %duV\n", vdd);
ret = adc_vss_value(dev, &vss);
if (!ret)
printf("vss: %duV\n", vss);
return CMD_RET_SUCCESS;
}
static int do_adc_single(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
char *varname = NULL;
struct udevice *dev;
unsigned int data;
int ret, uV, val;
if (argc < 3)
return CMD_RET_USAGE;
if (argc >= 4)
varname = argv[3];
ret = adc_channel_single_shot(argv[1], simple_strtol(argv[2], NULL, 0),
&data);
if (ret) {
printf("Error getting single shot for device %s channel %s (ret=%d)\n",
argv[1], argv[2], ret);
return CMD_RET_FAILURE;
}
ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
if (!ret && !adc_raw_to_uV(dev, data, &uV)) {
val = uV;
printf("%u, %d uV\n", data, uV);
} else {
val = data;
printf("%u\n", data);
}
if (varname)
env_set_ulong(varname, val);
return CMD_RET_SUCCESS;
}
static int do_adc_scan(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct adc_channel ch[ADC_MAX_CHANNEL];
struct udevice *dev;
unsigned int ch_mask;
int i, chan, ret, uV;
if (argc < 2)
return CMD_RET_USAGE;
ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
if (ret) {
pr_err("Can't get the ADC %s: %d\n", argv[1], ret);
return CMD_RET_FAILURE;
}
switch (argc) {
case 3:
ch_mask = simple_strtoul(argv[2], NULL, 0);
if (ch_mask)
break;
case 2:
ret = adc_channel_mask(dev, &ch_mask);
if (ret) {
pr_err("Can't get mask for %s: %d\n", dev->name, ret);
return CMD_RET_FAILURE;
}
break;
}
ret = adc_channels_single_shot(dev->name, ch_mask, ch);
if (ret) {
pr_err("Can't get single shot for %s (chans mask: 0x%x): %d\n",
dev->name, ch_mask, ret);
return CMD_RET_FAILURE;
}
for (chan = 0, i = 0; chan < ADC_MAX_CHANNEL; chan++) {
if (!(ch_mask & ADC_CHANNEL(chan)))
continue;
if (!adc_raw_to_uV(dev, ch[i].data, &uV))
printf("[%02d]: %u, %d uV\n", ch[i].id, ch[i].data, uV);
else
printf("[%02d]: %u\n", ch[i].id, ch[i].data);
i++;
}
return CMD_RET_SUCCESS;
}
static char adc_help_text[] =
"list - list ADC devices\n"
"adc info <name> - Get ADC device info\n"
"adc single <name> <channel> [varname] - Get Single data of ADC device channel\n"
"adc scan <name> [channel mask] - Scan all [or masked] ADC channels";
U_BOOT_CMD_WITH_SUBCMDS(adc, "ADC sub-system", adc_help_text,
U_BOOT_SUBCMD_MKENT(list, 1, 1, do_adc_list),
U_BOOT_SUBCMD_MKENT(info, 2, 1, do_adc_info),
U_BOOT_SUBCMD_MKENT(single, 4, 1, do_adc_single),
U_BOOT_SUBCMD_MKENT(scan, 3, 1, do_adc_scan));
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