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cmd: adc: add an option to scan some or all available channels

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Add new option to 'adc' command to do a single scan of:
- some channel(s), using mask argument
- all channels available on an ADC device (when optional mask is omitted).

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Fabrice Gasnier 2018-11-12 14:04:01 +01:00 committed by Tom Rini
parent c56fc49a60
commit 61927d286d
1 changed files with 54 additions and 1 deletions
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55
cmd/adc.c
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@ -95,10 +95,62 @@ static int do_adc_single(cmd_tbl_t *cmdtp, int flag, int argc,
return CMD_RET_SUCCESS;
}
static int do_adc_scan(cmd_tbl_t *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 cmd_tbl_t cmd_adc_sub[] = {
U_BOOT_CMD_MKENT(list, 1, 1, do_adc_list, "", ""),
U_BOOT_CMD_MKENT(info, 2, 1, do_adc_info, "", ""),
U_BOOT_CMD_MKENT(single, 3, 1, do_adc_single, "", ""),
U_BOOT_CMD_MKENT(scan, 3, 1, do_adc_scan, "", ""),
};
static int do_adc(cmd_tbl_t *cmdtp, int flag, int argc,
@ -124,6 +176,7 @@ static int do_adc(cmd_tbl_t *cmdtp, int flag, int argc,
static char adc_help_text[] =
"list - list ADC devices\n"
"adc info <name> - Get ADC device info\n"
"adc single <name> <channel> - Get Single data of ADC device channel";
"adc single <name> <channel> - Get Single data of ADC device channel\n"
"adc scan <name> [channel mask] - Scan all [or masked] ADC channels";
U_BOOT_CMD(adc, 4, 1, do_adc, "ADC sub-system", adc_help_text);