drivers/staging/iio/accel/adis16203.c

Source file repositories/reference/linux-study-clean/drivers/staging/iio/accel/adis16203.c

File Facts

System
Linux kernel
Corpus path
drivers/staging/iio/accel/adis16203.c
Extension
.c
Size
8507 bytes
Lines
316
Domain
Driver Families
Bucket
drivers/staging
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

switch (chan->type) {
		case IIO_VOLTAGE:
			if (chan->channel == 0) {
				*val = 1;
				*val2 = 220000; /* 1.22 mV */
			} else {
				*val = 0;
				*val2 = 610000; /* 0.61 mV */
			}
			return IIO_VAL_INT_PLUS_MICRO;
		case IIO_TEMP:
			*val = -470; /* -0.47 C */
			*val2 = 0;
			return IIO_VAL_INT_PLUS_MICRO;
		case IIO_INCLI:
			*val = 0;
			*val2 = 25000; /* 0.025 degree */
			return IIO_VAL_INT_PLUS_MICRO;
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_OFFSET:
		*val = 25000 / -470 - 1278; /* 25 C = 1278 */
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_CALIBBIAS:
		addr = adis16203_addresses[chan->scan_index];
		ret = adis_read_reg_16(st, addr, &val16);
		if (ret)
			return ret;
		*val = sign_extend32(val16, 13);
		return IIO_VAL_INT;
	default:
		return -EINVAL;
	}
}

static const struct iio_chan_spec adis16203_channels[] = {
	ADIS_SUPPLY_CHAN(ADIS16203_SUPPLY_OUT, ADIS16203_SCAN_SUPPLY, 0, 12),
	ADIS_AUX_ADC_CHAN(ADIS16203_AUX_ADC, ADIS16203_SCAN_AUX_ADC, 0, 12),
	ADIS_INCLI_CHAN(X, ADIS16203_XINCL_OUT, ADIS16203_SCAN_INCLI_X,
			BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
	/* Fixme: Not what it appears to be - see data sheet */
	ADIS_INCLI_CHAN(Y, ADIS16203_YINCL_OUT, ADIS16203_SCAN_INCLI_Y,
			0, 0, 14),
	ADIS_TEMP_CHAN(ADIS16203_TEMP_OUT, ADIS16203_SCAN_TEMP, 0, 12),
	IIO_CHAN_SOFT_TIMESTAMP(5),
};

static const struct iio_info adis16203_info = {
	.read_raw = adis16203_read_raw,
	.write_raw = adis16203_write_raw,
	.update_scan_mode = adis_update_scan_mode,
};

static const char * const adis16203_status_error_msgs[] = {
	[ADIS16203_DIAG_STAT_SELFTEST_FAIL_BIT] = "Self test failure",
	[ADIS16203_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
	[ADIS16203_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
	[ADIS16203_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
	[ADIS16203_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.975V",
};

static const struct adis_timeout adis16203_timeouts = {
	.reset_ms = ADIS16203_STARTUP_DELAY,
	.sw_reset_ms = ADIS16203_STARTUP_DELAY,
	.self_test_ms = ADIS16203_STARTUP_DELAY
};

static const struct adis_data adis16203_data = {
	.read_delay = 20,
	.msc_ctrl_reg = ADIS16203_MSC_CTRL,
	.glob_cmd_reg = ADIS16203_GLOB_CMD,
	.diag_stat_reg = ADIS16203_DIAG_STAT,

	.self_test_mask = ADIS16203_MSC_CTRL_SELF_TEST_EN,
	.self_test_reg = ADIS16203_MSC_CTRL,
	.self_test_no_autoclear = true,
	.timeouts = &adis16203_timeouts,

	.status_error_msgs = adis16203_status_error_msgs,
	.status_error_mask = BIT(ADIS16203_DIAG_STAT_SELFTEST_FAIL_BIT) |
		BIT(ADIS16203_DIAG_STAT_SPI_FAIL_BIT) |
		BIT(ADIS16203_DIAG_STAT_FLASH_UPT_BIT) |
		BIT(ADIS16203_DIAG_STAT_POWER_HIGH_BIT) |
		BIT(ADIS16203_DIAG_STAT_POWER_LOW_BIT),
};

static int adis16203_probe(struct spi_device *spi)
{
	int ret;

Annotation

Implementation Notes