drivers/hwmon/pmbus/pxe1610.c

Source file repositories/reference/linux-study-clean/drivers/hwmon/pmbus/pxe1610.c

File Facts

System
Linux kernel
Corpus path
drivers/hwmon/pmbus/pxe1610.c
Extension
.c
Size
3718 bytes
Lines
155
Domain
Driver Families
Bucket
drivers/hwmon
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

if (pmbus_check_byte_register(client, i, PMBUS_VOUT_MODE)) {
			u8 vout_mode;
			int ret;

			/* Read the register with VOUT scaling value.*/
			ret = pmbus_read_byte_data(client, i, PMBUS_VOUT_MODE);
			if (ret < 0)
				return ret;

			vout_mode = ret & GENMASK(4, 0);

			switch (vout_mode) {
			case 1:
				info->vrm_version[i] = vr12;
				break;
			case 2:
				info->vrm_version[i] = vr13;
				break;
			default:
				/*
				 * If prior pages are available limit operation
				 * to them
				 */
				if (i != 0) {
					info->pages = i;
					return 0;
				}

				return -ENODEV;
			}
		}
	}

	return 0;
}

static struct pmbus_driver_info pxe1610_info = {
	.pages = PXE1610_NUM_PAGES,
	.format[PSC_VOLTAGE_IN] = linear,
	.format[PSC_VOLTAGE_OUT] = vid,
	.format[PSC_CURRENT_IN] = linear,
	.format[PSC_CURRENT_OUT] = linear,
	.format[PSC_TEMPERATURE] = linear,
	.format[PSC_POWER] = linear,
	.func[0] = PMBUS_HAVE_VIN
		| PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN
		| PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN
		| PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP
		| PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
		| PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP,
	.func[1] = PMBUS_HAVE_VIN
		| PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN
		| PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN
		| PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP
		| PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
		| PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP,
	.func[2] = PMBUS_HAVE_VIN
		| PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN
		| PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN
		| PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP
		| PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
		| PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP,
	.identify = pxe1610_identify,
};

static int pxe1610_probe(struct i2c_client *client)
{
	struct pmbus_driver_info *info;
	u8 buf[I2C_SMBUS_BLOCK_MAX];
	int ret;

	if (!i2c_check_functionality(
			client->adapter,
			I2C_FUNC_SMBUS_READ_BYTE_DATA
			| I2C_FUNC_SMBUS_READ_WORD_DATA
			| I2C_FUNC_SMBUS_READ_BLOCK_DATA))
		return -ENODEV;

	/*
	 * By default this device doesn't boot to page 0, so set page 0
	 * to access all pmbus registers.
	 */
	ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
	if (ret < 0)
		return dev_err_probe(&client->dev, ret,
				     "Failed to set page 0\n");

	/* Read Manufacturer id */
	ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
	if (ret < 0) {

Annotation

Implementation Notes