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 --- V2: - Fix up commit message - Call adc_raw_to_uV() only once --- cmd/adc.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/cmd/adc.c b/cmd/adc.c index 75739bc8eed..8de9121cad6 100644 --- a/cmd/adc.c +++ b/cmd/adc.c @@ -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,