Hi Marek,
On 4/13/22 04:17, Marek Vasut wrote:
Add the ability to start ADC conversion result in an environment
s/to start/to save/ ?
variable. This is useful for further arbitrary processing by the
U-Boot scripts.
Signed-off-by: Marek Vasut
Cc: Fabrice Gasnier
Cc: Simon Glass
---
cmd/adc.c | 13 -
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/cmd/adc.c b/cmd/adc.c
index 75739bc8eed..4f548b811ec 100644
--- a/cmd/adc.c
+++ b/cmd/adc.c
@@ -71,6 +71,7 @@ static int do_adc_info(struct cmd_tbl *cmdtp, int flag, int
argc,
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;
@@ -78,6 +79,9 @@ static int do_adc_single(struct cmd_tbl *cmdtp, int flag, int
argc,
if (argc < 3)
return CMD_RET_USAGE;
+ if (argc >= 3)
+ varname = argv[2];
+
ret = adc_channel_single_shot(argv[1], simple_strtol(argv[2], NULL, 0),
);
if (ret) {
@@ -92,6 +96,13 @@ static int do_adc_single(struct cmd_tbl *cmdtp, int flag,
int argc,
else
printf("%u\n", data);
+ if (varname) {
+ if (!adc_raw_to_uV(dev, data, ))
+ env_set_ulong(varname, uV);
+ else
+ env_set_ulong(varname, data);
+ }
+
Minor remark: no need to call 2 times adc_raw_to_uV()
conversion result can be saved in a local variable
+ ulong var_value;
ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], );
if (!ret && !adc_raw_to_uV(dev, data, )) {
printf("%u, %d uV\n", data, uV);
+ var_value = uV;
} else {
printf("%u\n", data);
+ var_value = data;
}
+ if (varname)
+ env_set_ulong(varname, var_value);
return CMD_RET_SUCCESS;
}
@@ -149,7 +160,7 @@ static int do_adc_scan(struct cmd_tbl *cmdtp, int flag, int argc,
static char adc_help_text[] =
"list - list ADC devices\n"
"adc info - Get ADC device info\n"
- "adc single - Get Single data of ADC device channel\n"
+ "adc single [varname] - Get Single data of ADC device
channel\n"
"adc scan [channel mask] - Scan all [or masked] ADC channels";
U_BOOT_CMD_WITH_SUBCMDS(adc, "ADC sub-system", adc_help_text,
Regards
Patrick
