Add the ability to start 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: Simon Glass sjg@chromium.org --- 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), &data); 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, &uV)) + env_set_ulong(varname, uV); + else + env_set_ulong(varname, data); + } + 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 <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,