drivers/hwmon/pmbus/pim4328.c

Source file repositories/reference/linux-study-clean/drivers/hwmon/pmbus/pim4328.c

File Facts

System
Linux kernel
Corpus path
drivers/hwmon/pmbus/pim4328.c
Extension
.c
Size
6121 bytes
Lines
234
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

struct pim4328_data {
	enum chips id;
	struct pmbus_driver_info info;
};

#define to_pim4328_data(x)  container_of(x, struct pim4328_data, info)

/* PIM4006 and PIM4328 */
#define PIM4328_MFR_READ_VINA		0xd3
#define PIM4328_MFR_READ_VINB		0xd4

/* PIM4006 */
#define PIM4328_MFR_READ_IINA		0xd6
#define PIM4328_MFR_READ_IINB		0xd7
#define PIM4328_MFR_FET_CHECKSTATUS	0xd9

/* PIM4328 */
#define PIM4328_MFR_STATUS_BITS		0xd5

/* PIM4820 */
#define PIM4328_MFR_READ_STATUS		0xd0

static const struct i2c_device_id pim4328_id[] = {
	{ .name = "bmr455", .driver_data = pim4328 },
	{ .name = "pim4006", .driver_data = pim4006 },
	{ .name = "pim4106", .driver_data = pim4006 },
	{ .name = "pim4206", .driver_data = pim4006 },
	{ .name = "pim4306", .driver_data = pim4006 },
	{ .name = "pim4328", .driver_data = pim4328 },
	{ .name = "pim4406", .driver_data = pim4006 },
	{ .name = "pim4820", .driver_data = pim4820 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, pim4328_id);

static int pim4328_read_word_data(struct i2c_client *client, int page,
				  int phase, int reg)
{
	int ret;

	if (page > 0)
		return -ENXIO;

	if (phase == 0xff)
		return -ENODATA;

	switch (reg) {
	case PMBUS_READ_VIN:
		ret = pmbus_read_word_data(client, page, phase,
					   phase == 0 ? PIM4328_MFR_READ_VINA
						      : PIM4328_MFR_READ_VINB);
		break;
	case PMBUS_READ_IIN:
		ret = pmbus_read_word_data(client, page, phase,
					   phase == 0 ? PIM4328_MFR_READ_IINA
						      : PIM4328_MFR_READ_IINB);
		break;
	default:
		ret = -ENODATA;
	}

	return ret;
}

static int pim4328_read_byte_data(struct i2c_client *client, int page, int reg)
{
	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
	struct pim4328_data *data = to_pim4328_data(info);
	int ret, status;

	if (page > 0)
		return -ENXIO;

	switch (reg) {
	case PMBUS_STATUS_BYTE:
		ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_BYTE);
		if (ret < 0)
			return ret;
		if (data->id == pim4006) {
			status = pmbus_read_word_data(client, page, 0xff,
						      PIM4328_MFR_FET_CHECKSTATUS);
			if (status < 0)
				return status;
			if (status & 0x0630) /* Input UV */
				ret |= PB_STATUS_VIN_UV;
		} else if (data->id == pim4328) {
			status = pmbus_read_byte_data(client, page,
						      PIM4328_MFR_STATUS_BITS);
			if (status < 0)
				return status;

Annotation

Implementation Notes