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| author | Marek Vasut <marex@denx.de> | 2022-04-14 18:52:25 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2022-04-22 15:44:10 -0400 |
| commit | 9de612ae4ded53f742f5f99929c06d0839471ced (patch) | |
| tree | 1362dfd27f55e133d0fe8a8b114650d7178e87fb /cmd | |
| parent | 0de71bb58068d7e87765fa7df26fb7bd3d2a93cf (diff) | |
| download | u-boot-9de612ae4ded53f742f5f99929c06d0839471ced.zip u-boot-9de612ae4ded53f742f5f99929c06d0839471ced.tar.gz u-boot-9de612ae4ded53f742f5f99929c06d0839471ced.tar.bz2 | |
cmd: adc: Add support for storing ADC result in env variable
Add the ability to save ADC conversion result in an environment
variable. This is useful for further arbitrary processing by the
U-Boot scripts.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Cc: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Diffstat (limited to 'cmd')
| -rw-r--r-- | cmd/adc.c | 18 |
1 files changed, 14 insertions, 4 deletions
@@ -71,13 +71,17 @@ 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; + int ret, uV, val; 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), &data); if (ret) { @@ -87,10 +91,16 @@ static int do_adc_single(struct cmd_tbl *cmdtp, int flag, int argc, } ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev); - if (!ret && !adc_raw_to_uV(dev, data, &uV)) + if (!ret && !adc_raw_to_uV(dev, data, &uV)) { + val = uV; printf("%u, %d uV\n", data, uV); - else + } else { + val = data; printf("%u\n", data); + } + + if (varname) + env_set_ulong(varname, val); return CMD_RET_SUCCESS; } @@ -149,7 +159,7 @@ 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 <name> - Get ADC device info\n" - "adc single <name> <channel> - Get Single data of ADC device channel\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, |