Add an 'adc' cli command to get adc devices informations and read single shots datas.
Signed-off-by: Neil Armstrong narmstrong@baylibre.com --- cmd/Kconfig | 8 ++++ cmd/Makefile | 1 + cmd/adc.c | 121 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 130 insertions(+) create mode 100644 cmd/adc.c
diff --git a/cmd/Kconfig b/cmd/Kconfig index bc1d2f3..495c634 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -601,6 +601,14 @@ config CMD_ARMFLASH help ARM Ltd reference designs flash partition access
+config CMD_ADC + bool "adc - Access Analog to Digital Converters info and data" + select ADC + select DM_REGULATOR + help + Shows ADC device info and permit printing one-shot analog converted + data from a named Analog to Digital Converter. + config CMD_CLK bool "clk - Show clock frequencies" help diff --git a/cmd/Makefile b/cmd/Makefile index c4269ac..4c66353 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -14,6 +14,7 @@ obj-y += version.o
# command obj-$(CONFIG_CMD_AES) += aes.o +obj-$(CONFIG_CMD_ADC) += adc.o obj-$(CONFIG_CMD_ARMFLASH) += armflash.o obj-y += blk_common.o obj-$(CONFIG_SOURCE) += source.o diff --git a/cmd/adc.c b/cmd/adc.c new file mode 100644 index 0000000..66d4a4a --- /dev/null +++ b/cmd/adc.c @@ -0,0 +1,121 @@ +/* + * Copyright (C) 2018 BayLibre, SAS + * Author: Neil Armstrong narmstrong@baylibre.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#include <common.h> +#include <command.h> +#include <dm.h> +#include <adc.h> + +static int do_adc_list(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]) +{ + struct udevice *dev; + int ret; + + ret = uclass_first_device_err(UCLASS_ADC, &dev); + if (ret) { + printf("No available ADC device\n"); + return CMD_RET_FAILURE; + } + + do { + printf("- %s\n", dev->name); + + ret = uclass_next_device(&dev); + if (ret) + return CMD_RET_FAILURE; + } while (dev); + + return CMD_RET_SUCCESS; +} + +static int do_adc_info(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]) +{ + struct udevice *dev; + unsigned int data_mask; + int ret, vss, vdd; + + if (argc < 2) + return CMD_RET_USAGE; + + ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev); + if (ret) { + printf("Unknown ADC device %s\n", argv[1]); + return CMD_RET_FAILURE; + } + + printf("ADC Device '%s' :\n", argv[1]); + + ret = adc_data_mask(dev, &data_mask); + if (!ret) + printf("data mask: %x\n", data_mask); + + ret = adc_vdd_value(dev, &vdd); + if (!ret) + printf("vdd: %duV\n", vdd); + + ret = adc_vss_value(dev, &vss); + if (!ret) + printf("vss: %duV\n", vss); + + return CMD_RET_SUCCESS; +} + +static int do_adc_single(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]) +{ + unsigned int data; + int ret; + + if (argc < 3) + return CMD_RET_USAGE; + + ret = adc_channel_single_shot(argv[1], simple_strtol(argv[2], NULL, 0), + &data); + if (ret) { + printf("Error getting single shot for device %s channel %s\n", + argv[1], argv[2]); + return CMD_RET_FAILURE; + } + + printf("%u\n", data); + + 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, "", ""), +}; + +static int do_adc(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]) +{ + cmd_tbl_t *c; + + if (argc < 2) + return CMD_RET_USAGE; + + /* Strip off leading 'adc' command argument */ + argc--; + argv++; + + c = find_cmd_tbl(argv[0], &cmd_adc_sub[0], ARRAY_SIZE(cmd_adc_sub)); + + if (c) + return c->cmd(cmdtp, flag, argc, argv); + else + return CMD_RET_USAGE; +} + +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"; + +U_BOOT_CMD(adc, 4, 1, do_adc, "ADC sub-system", adc_help_text);