[U-Boot] [PATCH v2 4/4] cmd: adc: add an option to scan some or all available channels
Fabrice Gasnier
fabrice.gasnier at st.com
Mon Nov 12 13:04:01 UTC 2018
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 at st.com>
---
Changes in v2: None
cmd/adc.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 54 insertions(+), 1 deletion(-)
diff --git a/cmd/adc.c b/cmd/adc.c
index 7360a96..2d635ac 100644
--- a/cmd/adc.c
+++ b/cmd/adc.c
@@ -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);
--
1.9.1
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