[mirror_ubuntu-jammy-kernel.git] / drivers / hwmon / pmbus / ibm-cffps.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright 2017 IBM Corp.
 */

#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/i2c.h>
#include <linux/jiffies.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_device.h>
#include <linux/pmbus.h>

#include "pmbus.h"

#define CFFPS_FRU_CMD				0x9A
#define CFFPS_PN_CMD				0x9B
#define CFFPS_HEADER_CMD			0x9C
#define CFFPS_SN_CMD				0x9E
#define CFFPS_MAX_POWER_OUT_CMD			0xA7
#define CFFPS_CCIN_CMD				0xBD
#define CFFPS_FW_CMD				0xFA
#define CFFPS1_FW_NUM_BYTES			4
#define CFFPS2_FW_NUM_WORDS			3
#define CFFPS_SYS_CONFIG_CMD			0xDA
#define CFFPS_12VCS_VOUT_CMD			0xDE

#define CFFPS_INPUT_HISTORY_CMD			0xD6
#define CFFPS_INPUT_HISTORY_SIZE		100

#define CFFPS_CCIN_REVISION			GENMASK(7, 0)
#define  CFFPS_CCIN_REVISION_LEGACY		 0xde
#define CFFPS_CCIN_VERSION			GENMASK(15, 8)
#define CFFPS_CCIN_VERSION_1			 0x2b
#define CFFPS_CCIN_VERSION_2			 0x2e
#define CFFPS_CCIN_VERSION_3			 0x51

/* STATUS_MFR_SPECIFIC bits */
#define CFFPS_MFR_FAN_FAULT			BIT(0)
#define CFFPS_MFR_THERMAL_FAULT			BIT(1)
#define CFFPS_MFR_OV_FAULT			BIT(2)
#define CFFPS_MFR_UV_FAULT			BIT(3)
#define CFFPS_MFR_PS_KILL			BIT(4)
#define CFFPS_MFR_OC_FAULT			BIT(5)
#define CFFPS_MFR_VAUX_FAULT			BIT(6)
#define CFFPS_MFR_CURRENT_SHARE_WARNING		BIT(7)

#define CFFPS_LED_BLINK				(BIT(0) | BIT(6))
#define CFFPS_LED_ON				(BIT(1) | BIT(6))
#define CFFPS_LED_OFF				(BIT(2) | BIT(6))
#define CFFPS_BLINK_RATE_MS			250

enum {
	CFFPS_DEBUGFS_INPUT_HISTORY = 0,
	CFFPS_DEBUGFS_FRU,
	CFFPS_DEBUGFS_PN,
	CFFPS_DEBUGFS_HEADER,
	CFFPS_DEBUGFS_SN,
	CFFPS_DEBUGFS_MAX_POWER_OUT,
	CFFPS_DEBUGFS_CCIN,
	CFFPS_DEBUGFS_FW,
	CFFPS_DEBUGFS_ON_OFF_CONFIG,
	CFFPS_DEBUGFS_NUM_ENTRIES
};

enum versions { cffps1, cffps2, cffps_unknown };

struct ibm_cffps_input_history {
	struct mutex update_lock;
	unsigned long last_update;

	u8 byte_count;
	u8 data[CFFPS_INPUT_HISTORY_SIZE];
};

struct ibm_cffps {
	enum versions version;
	struct i2c_client *client;

	struct ibm_cffps_input_history input_history;

	int debugfs_entries[CFFPS_DEBUGFS_NUM_ENTRIES];

	char led_name[32];
	u8 led_state;
	struct led_classdev led;
};

static const struct i2c_device_id ibm_cffps_id[];

#define to_psu(x, y) container_of((x), struct ibm_cffps, debugfs_entries[(y)])

static ssize_t ibm_cffps_read_input_history(struct ibm_cffps *psu,
					    char __user *buf, size_t count,
					    loff_t *ppos)
{
	int rc;
	u8 msgbuf0[1] = { CFFPS_INPUT_HISTORY_CMD };
	u8 msgbuf1[CFFPS_INPUT_HISTORY_SIZE + 1] = { 0 };
	struct i2c_msg msg[2] = {
		{
			.addr = psu->client->addr,
			.flags = psu->client->flags,
			.len = 1,
			.buf = msgbuf0,
		}, {
			.addr = psu->client->addr,
			.flags = psu->client->flags | I2C_M_RD,
			.len = CFFPS_INPUT_HISTORY_SIZE + 1,
			.buf = msgbuf1,
		},
	};

	if (!*ppos) {
		mutex_lock(&psu->input_history.update_lock);
		if (time_after(jiffies, psu->input_history.last_update + HZ)) {
			/*
			 * Use a raw i2c transfer, since we need more bytes
			 * than Linux I2C supports through smbus xfr (only 32).
			 */
			rc = i2c_transfer(psu->client->adapter, msg, 2);
			if (rc < 0) {
				mutex_unlock(&psu->input_history.update_lock);
				return rc;
			}

			psu->input_history.byte_count = msgbuf1[0];
			memcpy(psu->input_history.data, &msgbuf1[1],
			       CFFPS_INPUT_HISTORY_SIZE);
			psu->input_history.last_update = jiffies;
		}

		mutex_unlock(&psu->input_history.update_lock);
	}

	return simple_read_from_buffer(buf, count, ppos,
				       psu->input_history.data,
				       psu->input_history.byte_count);
}

static ssize_t ibm_cffps_debugfs_read(struct file *file, char __user *buf,
				      size_t count, loff_t *ppos)
{
	u8 cmd;
	int i, rc;
	int *idxp = file->private_data;
	int idx = *idxp;
	struct ibm_cffps *psu = to_psu(idxp, idx);
	char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };

	pmbus_set_page(psu->client, 0, 0xff);

	switch (idx) {
	case CFFPS_DEBUGFS_INPUT_HISTORY:
		return ibm_cffps_read_input_history(psu, buf, count, ppos);
	case CFFPS_DEBUGFS_FRU:
		cmd = CFFPS_FRU_CMD;
		break;
	case CFFPS_DEBUGFS_PN:
		cmd = CFFPS_PN_CMD;
		break;
	case CFFPS_DEBUGFS_HEADER:
		cmd = CFFPS_HEADER_CMD;
		break;
	case CFFPS_DEBUGFS_SN:
		cmd = CFFPS_SN_CMD;
		break;
	case CFFPS_DEBUGFS_MAX_POWER_OUT:
		if (psu->version == cffps1) {
			rc = i2c_smbus_read_word_swapped(psu->client,
					CFFPS_MAX_POWER_OUT_CMD);
		} else {
			rc = i2c_smbus_read_word_data(psu->client,
					CFFPS_MAX_POWER_OUT_CMD);
		}

		if (rc < 0)
			return rc;

		rc = snprintf(data, I2C_SMBUS_BLOCK_MAX, "%d", rc);
		goto done;
	case CFFPS_DEBUGFS_CCIN:
		rc = i2c_smbus_read_word_swapped(psu->client, CFFPS_CCIN_CMD);
		if (rc < 0)
			return rc;

		rc = snprintf(data, 5, "%04X", rc);
		goto done;
	case CFFPS_DEBUGFS_FW:
		switch (psu->version) {
		case cffps1:
			for (i = 0; i < CFFPS1_FW_NUM_BYTES; ++i) {
				rc = i2c_smbus_read_byte_data(psu->client,
							      CFFPS_FW_CMD +
								i);
				if (rc < 0)
					return rc;

				snprintf(&data[i * 2], 3, "%02X", rc);
			}

			rc = i * 2;
			break;
		case cffps2:
			for (i = 0; i < CFFPS2_FW_NUM_WORDS; ++i) {
				rc = i2c_smbus_read_word_data(psu->client,
							      CFFPS_FW_CMD +
								i);
				if (rc < 0)
					return rc;

				snprintf(&data[i * 4], 5, "%04X", rc);
			}

			rc = i * 4;
			break;
		default:
			return -EOPNOTSUPP;
		}
		goto done;
	case CFFPS_DEBUGFS_ON_OFF_CONFIG:
		rc = i2c_smbus_read_byte_data(psu->client,
					      PMBUS_ON_OFF_CONFIG);
		if (rc < 0)
			return rc;

		rc = snprintf(data, 3, "%02x", rc);
		goto done;
	default:
		return -EINVAL;
	}

	rc = i2c_smbus_read_block_data(psu->client, cmd, data);
	if (rc < 0)
		return rc;

done:
	data[rc] = '\n';
	rc += 2;

	return simple_read_from_buffer(buf, count, ppos, data, rc);
}

static ssize_t ibm_cffps_debugfs_write(struct file *file,
				       const char __user *buf, size_t count,
				       loff_t *ppos)
{
	u8 data;
	ssize_t rc;
	int *idxp = file->private_data;
	int idx = *idxp;
	struct ibm_cffps *psu = to_psu(idxp, idx);

	switch (idx) {
	case CFFPS_DEBUGFS_ON_OFF_CONFIG:
		pmbus_set_page(psu->client, 0, 0xff);

		rc = simple_write_to_buffer(&data, 1, ppos, buf, count);
		if (rc <= 0)
			return rc;

		rc = i2c_smbus_write_byte_data(psu->client,
					       PMBUS_ON_OFF_CONFIG, data);
		if (rc)
			return rc;

		rc = 1;
		break;
	default:
		return -EINVAL;
	}

	return rc;
}

static const struct file_operations ibm_cffps_fops = {
	.llseek = noop_llseek,
	.read = ibm_cffps_debugfs_read,
	.write = ibm_cffps_debugfs_write,
	.open = simple_open,
};

static int ibm_cffps_read_byte_data(struct i2c_client *client, int page,
				    int reg)
{
	int rc, mfr;

	switch (reg) {
	case PMBUS_STATUS_VOUT:
	case PMBUS_STATUS_IOUT:
	case PMBUS_STATUS_TEMPERATURE:
	case PMBUS_STATUS_FAN_12:
		rc = pmbus_read_byte_data(client, page, reg);
		if (rc < 0)
			return rc;

		mfr = pmbus_read_byte_data(client, page,
					   PMBUS_STATUS_MFR_SPECIFIC);
		if (mfr < 0)
			/*
			 * Return the status register instead of an error,
			 * since we successfully read status.
			 */
			return rc;

		/* Add MFR_SPECIFIC bits to the standard pmbus status regs. */
		if (reg == PMBUS_STATUS_FAN_12) {
			if (mfr & CFFPS_MFR_FAN_FAULT)
				rc |= PB_FAN_FAN1_FAULT;
		} else if (reg == PMBUS_STATUS_TEMPERATURE) {
			if (mfr & CFFPS_MFR_THERMAL_FAULT)
				rc |= PB_TEMP_OT_FAULT;
		} else if (reg == PMBUS_STATUS_VOUT) {
			if (mfr & (CFFPS_MFR_OV_FAULT | CFFPS_MFR_VAUX_FAULT))
				rc |= PB_VOLTAGE_OV_FAULT;
			if (mfr & CFFPS_MFR_UV_FAULT)
				rc |= PB_VOLTAGE_UV_FAULT;
		} else if (reg == PMBUS_STATUS_IOUT) {
			if (mfr & CFFPS_MFR_OC_FAULT)
				rc |= PB_IOUT_OC_FAULT;
			if (mfr & CFFPS_MFR_CURRENT_SHARE_WARNING)
				rc |= PB_CURRENT_SHARE_FAULT;
		}
		break;
	default:
		rc = -ENODATA;
		break;
	}

	return rc;
}

static int ibm_cffps_read_word_data(struct i2c_client *client, int page,
				    int phase, int reg)
{
	int rc, mfr;

	switch (reg) {
	case PMBUS_STATUS_WORD:
		rc = pmbus_read_word_data(client, page, phase, reg);
		if (rc < 0)
			return rc;

		mfr = pmbus_read_byte_data(client, page,
					   PMBUS_STATUS_MFR_SPECIFIC);
		if (mfr < 0)
			/*
			 * Return the status register instead of an error,
			 * since we successfully read status.
			 */
			return rc;

		if (mfr & CFFPS_MFR_PS_KILL)
			rc |= PB_STATUS_OFF;
		break;
	case PMBUS_VIRT_READ_VMON:
		rc = pmbus_read_word_data(client, page, phase,
					  CFFPS_12VCS_VOUT_CMD);
		break;
	default:
		rc = -ENODATA;
		break;
	}

	return rc;
}

static int ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
					enum led_brightness brightness)
{
	int rc;
	u8 next_led_state;
	struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);

	if (brightness == LED_OFF) {
		next_led_state = CFFPS_LED_OFF;
	} else {
		brightness = LED_FULL;

		if (psu->led_state != CFFPS_LED_BLINK)
			next_led_state = CFFPS_LED_ON;
		else
			next_led_state = CFFPS_LED_BLINK;
	}

	dev_dbg(&psu->client->dev, "LED brightness set: %d. Command: %d.\n",
		brightness, next_led_state);

	pmbus_set_page(psu->client, 0, 0xff);

	rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
				       next_led_state);
	if (rc < 0)
		return rc;

	psu->led_state = next_led_state;
	led_cdev->brightness = brightness;

	return 0;
}

static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev,
				   unsigned long *delay_on,
				   unsigned long *delay_off)
{
	int rc;
	struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);

	dev_dbg(&psu->client->dev, "LED blink set.\n");

	pmbus_set_page(psu->client, 0, 0xff);

	rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
				       CFFPS_LED_BLINK);
	if (rc < 0)
		return rc;

	psu->led_state = CFFPS_LED_BLINK;
	led_cdev->brightness = LED_FULL;
	*delay_on = CFFPS_BLINK_RATE_MS;
	*delay_off = CFFPS_BLINK_RATE_MS;

	return 0;
}

static void ibm_cffps_create_led_class(struct ibm_cffps *psu)
{
	int rc;
	struct i2c_client *client = psu->client;
	struct device *dev = &client->dev;

	snprintf(psu->led_name, sizeof(psu->led_name), "%s-%02x", client->name,
		 client->addr);
	psu->led.name = psu->led_name;
	psu->led.max_brightness = LED_FULL;
	psu->led.brightness_set_blocking = ibm_cffps_led_brightness_set;
	psu->led.blink_set = ibm_cffps_led_blink_set;

	rc = devm_led_classdev_register(dev, &psu->led);
	if (rc)
		dev_warn(dev, "failed to register led class: %d\n", rc);
	else
		i2c_smbus_write_byte_data(client, CFFPS_SYS_CONFIG_CMD,
					  CFFPS_LED_OFF);
}

static struct pmbus_driver_info ibm_cffps_info[] = {
	[cffps1] = {
		.pages = 1,
		.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
			PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
			PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
			PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
			PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
			PMBUS_HAVE_STATUS_FAN12,
		.read_byte_data = ibm_cffps_read_byte_data,
		.read_word_data = ibm_cffps_read_word_data,
	},
	[cffps2] = {
		.pages = 2,
		.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
			PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
			PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
			PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
			PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
			PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_VMON,
		.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
			PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
			PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT,
		.read_byte_data = ibm_cffps_read_byte_data,
		.read_word_data = ibm_cffps_read_word_data,
	},
};

static struct pmbus_platform_data ibm_cffps_pdata = {
	.flags = PMBUS_SKIP_STATUS_CHECK | PMBUS_NO_CAPABILITY,
};

static int ibm_cffps_probe(struct i2c_client *client)
{
	int i, rc;
	enum versions vs = cffps_unknown;
	struct dentry *debugfs;
	struct dentry *ibm_cffps_dir;
	struct ibm_cffps *psu;
	const void *md = of_device_get_match_data(&client->dev);
	const struct i2c_device_id *id;

	if (md) {
		vs = (enum versions)md;
	} else {
		id = i2c_match_id(ibm_cffps_id, client);
		if (id)
			vs = (enum versions)id->driver_data;
	}

	if (vs == cffps_unknown) {
		u16 ccin_revision = 0;
		u16 ccin_version = CFFPS_CCIN_VERSION_1;
		int ccin = i2c_smbus_read_word_swapped(client, CFFPS_CCIN_CMD);

		if (ccin > 0) {
			ccin_revision = FIELD_GET(CFFPS_CCIN_REVISION, ccin);
			ccin_version = FIELD_GET(CFFPS_CCIN_VERSION, ccin);
		}

		switch (ccin_version) {
		default:
		case CFFPS_CCIN_VERSION_1:
			vs = cffps1;
			break;
		case CFFPS_CCIN_VERSION_2:
			vs = cffps2;
			break;
		case CFFPS_CCIN_VERSION_3:
			if (ccin_revision == CFFPS_CCIN_REVISION_LEGACY)
				vs = cffps1;
			else
				vs = cffps2;
			break;
		}

		/* Set the client name to include the version number. */
		snprintf(client->name, I2C_NAME_SIZE, "cffps%d", vs + 1);
	}

	client->dev.platform_data = &ibm_cffps_pdata;
	rc = pmbus_do_probe(client, &ibm_cffps_info[vs]);
	if (rc)
		return rc;

	/*
	 * Don't fail the probe if there isn't enough memory for leds and
	 * debugfs.
	 */
	psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
	if (!psu)
		return 0;

	psu->version = vs;
	psu->client = client;
	mutex_init(&psu->input_history.update_lock);
	psu->input_history.last_update = jiffies - HZ;

	ibm_cffps_create_led_class(psu);

	/* Don't fail the probe if we can't create debugfs */
	debugfs = pmbus_get_debugfs_dir(client);
	if (!debugfs)
		return 0;

	ibm_cffps_dir = debugfs_create_dir(client->name, debugfs);
	if (!ibm_cffps_dir)
		return 0;

	for (i = 0; i < CFFPS_DEBUGFS_NUM_ENTRIES; ++i)
		psu->debugfs_entries[i] = i;

	debugfs_create_file("input_history", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_INPUT_HISTORY],
			    &ibm_cffps_fops);
	debugfs_create_file("fru", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_FRU],
			    &ibm_cffps_fops);
	debugfs_create_file("part_number", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_PN],
			    &ibm_cffps_fops);
	debugfs_create_file("header", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_HEADER],
			    &ibm_cffps_fops);
	debugfs_create_file("serial_number", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_SN],
			    &ibm_cffps_fops);
	debugfs_create_file("max_power_out", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_MAX_POWER_OUT],
			    &ibm_cffps_fops);
	debugfs_create_file("ccin", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_CCIN],
			    &ibm_cffps_fops);
	debugfs_create_file("fw_version", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_FW],
			    &ibm_cffps_fops);
	debugfs_create_file("on_off_config", 0644, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_ON_OFF_CONFIG],
			    &ibm_cffps_fops);

	return 0;
}

static const struct i2c_device_id ibm_cffps_id[] = {
	{ "ibm_cffps1", cffps1 },
	{ "ibm_cffps2", cffps2 },
	{ "ibm_cffps", cffps_unknown },
	{}
};
MODULE_DEVICE_TABLE(i2c, ibm_cffps_id);

static const struct of_device_id ibm_cffps_of_match[] = {
	{
		.compatible = "ibm,cffps1",
		.data = (void *)cffps1
	},
	{
		.compatible = "ibm,cffps2",
		.data = (void *)cffps2
	},
	{
		.compatible = "ibm,cffps",
		.data = (void *)cffps_unknown
	},
	{}
};
MODULE_DEVICE_TABLE(of, ibm_cffps_of_match);

static struct i2c_driver ibm_cffps_driver = {
	.driver = {
		.name = "ibm-cffps",
		.of_match_table = ibm_cffps_of_match,
	},
	.probe_new = ibm_cffps_probe,
	.id_table = ibm_cffps_id,
};

module_i2c_driver(ibm_cffps_driver);

MODULE_AUTHOR("Eddie James");
MODULE_DESCRIPTION("PMBus driver for IBM Common Form Factor power supplies");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(PMBUS);
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
f69316d6 EJ	2	/*
f69316d6 EJ	3	* Copyright 2017 IBM Corp.
f69316d6 EJ	4	*/
f69316d6 EJ	5
da806a17	6	#include <linux/bitfield.h>
f69316d6	7	#include <linux/bitops.h>
d6bb645a	8	#include <linux/debugfs.h>
f69316d6	9	#include <linux/device.h>
d6bb645a	10	#include <linux/fs.h>
f69316d6	11	#include <linux/i2c.h>
d6bb645a	12	#include <linux/jiffies.h>
ef9e1cdf	13	#include <linux/leds.h>
f69316d6	14	#include <linux/module.h>
d6bb645a	15	#include <linux/mutex.h>
2f8a855e	16	#include <linux/of_device.h>
4471879a	17	#include <linux/pmbus.h>
f69316d6 EJ	18
	19	#include "pmbus.h"
	20
d6bb645a EJ	21	#define CFFPS_FRU_CMD 0x9A
d6bb645a EJ	22	#define CFFPS_PN_CMD 0x9B
abe508b6	23	#define CFFPS_HEADER_CMD 0x9C
d6bb645a	24	#define CFFPS_SN_CMD 0x9E
abe508b6	25	#define CFFPS_MAX_POWER_OUT_CMD 0xA7
d6bb645a	26	#define CFFPS_CCIN_CMD 0xBD
2f8a855e EJ	27	#define CFFPS_FW_CMD 0xFA
	28	#define CFFPS1_FW_NUM_BYTES 4
	29	#define CFFPS2_FW_NUM_WORDS 3
ef9e1cdf	30	#define CFFPS_SYS_CONFIG_CMD 0xDA
1952d79a	31	#define CFFPS_12VCS_VOUT_CMD 0xDE
d6bb645a EJ	32
	33	#define CFFPS_INPUT_HISTORY_CMD 0xD6
	34	#define CFFPS_INPUT_HISTORY_SIZE 100
	35
b1fbe673 EJ	36	#define CFFPS_CCIN_REVISION GENMASK(7, 0)
b1fbe673 EJ	37	#define CFFPS_CCIN_REVISION_LEGACY 0xde
da806a17 EJ	38	#define CFFPS_CCIN_VERSION GENMASK(15, 8)
	39	#define CFFPS_CCIN_VERSION_1 0x2b
	40	#define CFFPS_CCIN_VERSION_2 0x2e
b1fbe673	41	#define CFFPS_CCIN_VERSION_3 0x51
da806a17	42
f69316d6 EJ	43	/* STATUS_MFR_SPECIFIC bits */
	44	#define CFFPS_MFR_FAN_FAULT BIT(0)
	45	#define CFFPS_MFR_THERMAL_FAULT BIT(1)
	46	#define CFFPS_MFR_OV_FAULT BIT(2)
	47	#define CFFPS_MFR_UV_FAULT BIT(3)
	48	#define CFFPS_MFR_PS_KILL BIT(4)
	49	#define CFFPS_MFR_OC_FAULT BIT(5)
	50	#define CFFPS_MFR_VAUX_FAULT BIT(6)
	51	#define CFFPS_MFR_CURRENT_SHARE_WARNING BIT(7)
	52
76b72736 BW	53	#define CFFPS_LED_BLINK (BIT(0) \| BIT(6))
	54	#define CFFPS_LED_ON (BIT(1) \| BIT(6))
	55	#define CFFPS_LED_OFF (BIT(2) \| BIT(6))
ef9e1cdf	56	#define CFFPS_BLINK_RATE_MS 250
ef9e1cdf	57
d6bb645a EJ	58	enum {
	59	CFFPS_DEBUGFS_INPUT_HISTORY = 0,
	60	CFFPS_DEBUGFS_FRU,
	61	CFFPS_DEBUGFS_PN,
abe508b6	62	CFFPS_DEBUGFS_HEADER,
d6bb645a	63	CFFPS_DEBUGFS_SN,
abe508b6	64	CFFPS_DEBUGFS_MAX_POWER_OUT,
d6bb645a EJ	65	CFFPS_DEBUGFS_CCIN,
d6bb645a EJ	66	CFFPS_DEBUGFS_FW,
abe508b6	67	CFFPS_DEBUGFS_ON_OFF_CONFIG,
d6bb645a EJ	68	CFFPS_DEBUGFS_NUM_ENTRIES
	69	};
	70
da806a17	71	enum versions { cffps1, cffps2, cffps_unknown };
2f8a855e	72
d6bb645a EJ	73	struct ibm_cffps_input_history {
	74	struct mutex update_lock;
	75	unsigned long last_update;
	76
	77	u8 byte_count;
	78	u8 data[CFFPS_INPUT_HISTORY_SIZE];
	79	};
	80
	81	struct ibm_cffps {
2f8a855e	82	enum versions version;
d6bb645a EJ	83	struct i2c_client *client;
	84
	85	struct ibm_cffps_input_history input_history;
	86
	87	int debugfs_entries[CFFPS_DEBUGFS_NUM_ENTRIES];
ef9e1cdf	88
	89	char led_name[32];
	90	u8 led_state;
	91	struct led_classdev led;
d6bb645a EJ	92	};
d6bb645a EJ	93
dd431939 SK	94	static const struct i2c_device_id ibm_cffps_id[];
dd431939 SK	95
d6bb645a EJ	96	#define to_psu(x, y) container_of((x), struct ibm_cffps, debugfs_entries[(y)])
	97
	98	static ssize_t ibm_cffps_read_input_history(struct ibm_cffps *psu,
	99	char __user *buf, size_t count,
	100	loff_t *ppos)
	101	{
	102	int rc;
	103	u8 msgbuf0[1] = { CFFPS_INPUT_HISTORY_CMD };
	104	u8 msgbuf1[CFFPS_INPUT_HISTORY_SIZE + 1] = { 0 };
	105	struct i2c_msg msg[2] = {
	106	{
	107	.addr = psu->client->addr,
	108	.flags = psu->client->flags,
	109	.len = 1,
	110	.buf = msgbuf0,
	111	}, {
	112	.addr = psu->client->addr,
	113	.flags = psu->client->flags \| I2C_M_RD,
	114	.len = CFFPS_INPUT_HISTORY_SIZE + 1,
	115	.buf = msgbuf1,
	116	},
	117	};
	118
	119	if (!*ppos) {
	120	mutex_lock(&psu->input_history.update_lock);
	121	if (time_after(jiffies, psu->input_history.last_update + HZ)) {
	122	/*
	123	* Use a raw i2c transfer, since we need more bytes
	124	* than Linux I2C supports through smbus xfr (only 32).
	125	*/
	126	rc = i2c_transfer(psu->client->adapter, msg, 2);
	127	if (rc < 0) {
	128	mutex_unlock(&psu->input_history.update_lock);
	129	return rc;
	130	}
	131
	132	psu->input_history.byte_count = msgbuf1[0];
	133	memcpy(psu->input_history.data, &msgbuf1[1],
	134	CFFPS_INPUT_HISTORY_SIZE);
	135	psu->input_history.last_update = jiffies;
	136	}
	137
	138	mutex_unlock(&psu->input_history.update_lock);
	139	}
	140
	141	return simple_read_from_buffer(buf, count, ppos,
	142	psu->input_history.data,
	143	psu->input_history.byte_count);
	144	}
	145
abe508b6 EJ	146	static ssize_t ibm_cffps_debugfs_read(struct file file, char __user buf,
abe508b6 EJ	147	size_t count, loff_t *ppos)
d6bb645a EJ	148	{
	149	u8 cmd;
	150	int i, rc;
	151	int *idxp = file->private_data;
	152	int idx = *idxp;
	153	struct ibm_cffps *psu = to_psu(idxp, idx);
abe508b6	154	char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
d6bb645a	155
43f33b6e	156	pmbus_set_page(psu->client, 0, 0xff);
2f8a855e	157
d6bb645a EJ	158	switch (idx) {
	159	case CFFPS_DEBUGFS_INPUT_HISTORY:
	160	return ibm_cffps_read_input_history(psu, buf, count, ppos);
	161	case CFFPS_DEBUGFS_FRU:
	162	cmd = CFFPS_FRU_CMD;
	163	break;
	164	case CFFPS_DEBUGFS_PN:
	165	cmd = CFFPS_PN_CMD;
	166	break;
abe508b6 EJ	167	case CFFPS_DEBUGFS_HEADER:
	168	cmd = CFFPS_HEADER_CMD;
	169	break;
d6bb645a EJ	170	case CFFPS_DEBUGFS_SN:
	171	cmd = CFFPS_SN_CMD;
	172	break;
abe508b6	173	case CFFPS_DEBUGFS_MAX_POWER_OUT:
f067d558 BW	174	if (psu->version == cffps1) {
	175	rc = i2c_smbus_read_word_swapped(psu->client,
	176	CFFPS_MAX_POWER_OUT_CMD);
	177	} else {
	178	rc = i2c_smbus_read_word_data(psu->client,
	179	CFFPS_MAX_POWER_OUT_CMD);
	180	}
	181
abe508b6 EJ	182	if (rc < 0)
	183	return rc;
	184
	185	rc = snprintf(data, I2C_SMBUS_BLOCK_MAX, "%d", rc);
	186	goto done;
d6bb645a EJ	187	case CFFPS_DEBUGFS_CCIN:
	188	rc = i2c_smbus_read_word_swapped(psu->client, CFFPS_CCIN_CMD);
	189	if (rc < 0)
	190	return rc;
	191
	192	rc = snprintf(data, 5, "%04X", rc);
	193	goto done;
	194	case CFFPS_DEBUGFS_FW:
2f8a855e EJ	195	switch (psu->version) {
	196	case cffps1:
	197	for (i = 0; i < CFFPS1_FW_NUM_BYTES; ++i) {
	198	rc = i2c_smbus_read_byte_data(psu->client,
	199	CFFPS_FW_CMD +
	200	i);
	201	if (rc < 0)
	202	return rc;
	203
	204	snprintf(&data[i * 2], 3, "%02X", rc);
	205	}
d6bb645a	206
2f8a855e EJ	207	rc = i * 2;
	208	break;
	209	case cffps2:
	210	for (i = 0; i < CFFPS2_FW_NUM_WORDS; ++i) {
	211	rc = i2c_smbus_read_word_data(psu->client,
	212	CFFPS_FW_CMD +
	213	i);
	214	if (rc < 0)
	215	return rc;
	216
	217	snprintf(&data[i * 4], 5, "%04X", rc);
	218	}
d6bb645a	219
2f8a855e EJ	220	rc = i * 4;
	221	break;
	222	default:
	223	return -EOPNOTSUPP;
	224	}
d6bb645a	225	goto done;
abe508b6 EJ	226	case CFFPS_DEBUGFS_ON_OFF_CONFIG:
	227	rc = i2c_smbus_read_byte_data(psu->client,
	228	PMBUS_ON_OFF_CONFIG);
	229	if (rc < 0)
	230	return rc;
	231
	232	rc = snprintf(data, 3, "%02x", rc);
	233	goto done;
d6bb645a EJ	234	default:
	235	return -EINVAL;
	236	}
	237
	238	rc = i2c_smbus_read_block_data(psu->client, cmd, data);
	239	if (rc < 0)
	240	return rc;
	241
	242	done:
	243	data[rc] = '\n';
	244	rc += 2;
	245
	246	return simple_read_from_buffer(buf, count, ppos, data, rc);
	247	}
	248
abe508b6 EJ	249	static ssize_t ibm_cffps_debugfs_write(struct file *file,
	250	const char __user *buf, size_t count,
	251	loff_t *ppos)
	252	{
	253	u8 data;
	254	ssize_t rc;
	255	int *idxp = file->private_data;
	256	int idx = *idxp;
	257	struct ibm_cffps *psu = to_psu(idxp, idx);
	258
	259	switch (idx) {
	260	case CFFPS_DEBUGFS_ON_OFF_CONFIG:
43f33b6e	261	pmbus_set_page(psu->client, 0, 0xff);
abe508b6 EJ	262
abe508b6 EJ	263	rc = simple_write_to_buffer(&data, 1, ppos, buf, count);
d9c8ae69	264	if (rc <= 0)
abe508b6 EJ	265	return rc;
	266
	267	rc = i2c_smbus_write_byte_data(psu->client,
	268	PMBUS_ON_OFF_CONFIG, data);
	269	if (rc)
	270	return rc;
	271
	272	rc = 1;
	273	break;
	274	default:
	275	return -EINVAL;
	276	}
	277
	278	return rc;
	279	}
	280
d6bb645a EJ	281	static const struct file_operations ibm_cffps_fops = {
d6bb645a EJ	282	.llseek = noop_llseek,
abe508b6 EJ	283	.read = ibm_cffps_debugfs_read,
abe508b6 EJ	284	.write = ibm_cffps_debugfs_write,
d6bb645a EJ	285	.open = simple_open,
	286	};
	287
f69316d6 EJ	288	static int ibm_cffps_read_byte_data(struct i2c_client *client, int page,
	289	int reg)
	290	{
	291	int rc, mfr;
	292
	293	switch (reg) {
	294	case PMBUS_STATUS_VOUT:
	295	case PMBUS_STATUS_IOUT:
	296	case PMBUS_STATUS_TEMPERATURE:
	297	case PMBUS_STATUS_FAN_12:
	298	rc = pmbus_read_byte_data(client, page, reg);
	299	if (rc < 0)
	300	return rc;
	301
	302	mfr = pmbus_read_byte_data(client, page,
	303	PMBUS_STATUS_MFR_SPECIFIC);
	304	if (mfr < 0)
	305	/*
	306	* Return the status register instead of an error,
	307	* since we successfully read status.
	308	*/
	309	return rc;
	310
	311	/* Add MFR_SPECIFIC bits to the standard pmbus status regs. */
	312	if (reg == PMBUS_STATUS_FAN_12) {
	313	if (mfr & CFFPS_MFR_FAN_FAULT)
	314	rc \|= PB_FAN_FAN1_FAULT;
	315	} else if (reg == PMBUS_STATUS_TEMPERATURE) {
	316	if (mfr & CFFPS_MFR_THERMAL_FAULT)
	317	rc \|= PB_TEMP_OT_FAULT;
	318	} else if (reg == PMBUS_STATUS_VOUT) {
	319	if (mfr & (CFFPS_MFR_OV_FAULT \| CFFPS_MFR_VAUX_FAULT))
	320	rc \|= PB_VOLTAGE_OV_FAULT;
	321	if (mfr & CFFPS_MFR_UV_FAULT)
	322	rc \|= PB_VOLTAGE_UV_FAULT;
	323	} else if (reg == PMBUS_STATUS_IOUT) {
	324	if (mfr & CFFPS_MFR_OC_FAULT)
	325	rc \|= PB_IOUT_OC_FAULT;
	326	if (mfr & CFFPS_MFR_CURRENT_SHARE_WARNING)
	327	rc \|= PB_CURRENT_SHARE_FAULT;
	328	}
	329	break;
	330	default:
	331	rc = -ENODATA;
	332	break;
	333	}
	334
	335	return rc;
	336	}
	337
	338	static int ibm_cffps_read_word_data(struct i2c_client *client, int page,
43f33b6e	339	int phase, int reg)
f69316d6 EJ	340	{
	341	int rc, mfr;
	342
	343	switch (reg) {
	344	case PMBUS_STATUS_WORD:
43f33b6e	345	rc = pmbus_read_word_data(client, page, phase, reg);
f69316d6 EJ	346	if (rc < 0)
	347	return rc;
	348
	349	mfr = pmbus_read_byte_data(client, page,
	350	PMBUS_STATUS_MFR_SPECIFIC);
	351	if (mfr < 0)
	352	/*
	353	* Return the status register instead of an error,
	354	* since we successfully read status.
	355	*/
	356	return rc;
	357
	358	if (mfr & CFFPS_MFR_PS_KILL)
	359	rc \|= PB_STATUS_OFF;
	360	break;
1952d79a	361	case PMBUS_VIRT_READ_VMON:
43f33b6e GR	362	rc = pmbus_read_word_data(client, page, phase,
43f33b6e GR	363	CFFPS_12VCS_VOUT_CMD);
1952d79a	364	break;
f69316d6 EJ	365	default:
	366	rc = -ENODATA;
	367	break;
	368	}
	369
	370	return rc;
	371	}
	372
9861ff95 EJ	373	static int ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
9861ff95 EJ	374	enum led_brightness brightness)
ef9e1cdf	375	{
ef9e1cdf	376	int rc;
92b39ad4	377	u8 next_led_state;
ef9e1cdf	378	struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
	379
	380	if (brightness == LED_OFF) {
92b39ad4	381	next_led_state = CFFPS_LED_OFF;
ef9e1cdf	382	} else {
ef9e1cdf	383	brightness = LED_FULL;
92b39ad4	384
ef9e1cdf	385	if (psu->led_state != CFFPS_LED_BLINK)
92b39ad4 EJ	386	next_led_state = CFFPS_LED_ON;
	387	else
	388	next_led_state = CFFPS_LED_BLINK;
ef9e1cdf	389	}
ef9e1cdf	390
92b39ad4 EJ	391	dev_dbg(&psu->client->dev, "LED brightness set: %d. Command: %d.\n",
	392	brightness, next_led_state);
	393
43f33b6e	394	pmbus_set_page(psu->client, 0, 0xff);
2f8a855e	395
ef9e1cdf	396	rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
92b39ad4	397	next_led_state);
ef9e1cdf	398	if (rc < 0)
9861ff95	399	return rc;
ef9e1cdf	400
92b39ad4	401	psu->led_state = next_led_state;
ef9e1cdf	402	led_cdev->brightness = brightness;
9861ff95 EJ	403
9861ff95 EJ	404	return 0;
ef9e1cdf	405	}
	406
	407	static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev,
	408	unsigned long *delay_on,
	409	unsigned long *delay_off)
	410	{
	411	int rc;
	412	struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
	413
92b39ad4	414	dev_dbg(&psu->client->dev, "LED blink set.\n");
ef9e1cdf	415
43f33b6e	416	pmbus_set_page(psu->client, 0, 0xff);
2f8a855e	417
ef9e1cdf	418	rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
	419	CFFPS_LED_BLINK);
	420	if (rc < 0)
	421	return rc;
	422
92b39ad4 EJ	423	psu->led_state = CFFPS_LED_BLINK;
92b39ad4 EJ	424	led_cdev->brightness = LED_FULL;
ef9e1cdf	425	*delay_on = CFFPS_BLINK_RATE_MS;
	426	*delay_off = CFFPS_BLINK_RATE_MS;
	427
	428	return 0;
	429	}
	430
	431	static void ibm_cffps_create_led_class(struct ibm_cffps *psu)
	432	{
	433	int rc;
	434	struct i2c_client *client = psu->client;
	435	struct device *dev = &client->dev;
	436
	437	snprintf(psu->led_name, sizeof(psu->led_name), "%s-%02x", client->name,
	438	client->addr);
	439	psu->led.name = psu->led_name;
	440	psu->led.max_brightness = LED_FULL;
9861ff95	441	psu->led.brightness_set_blocking = ibm_cffps_led_brightness_set;
ef9e1cdf	442	psu->led.blink_set = ibm_cffps_led_blink_set;
	443
	444	rc = devm_led_classdev_register(dev, &psu->led);
	445	if (rc)
	446	dev_warn(dev, "failed to register led class: %d\n", rc);
74a71a83 EJ	447	else
	448	i2c_smbus_write_byte_data(client, CFFPS_SYS_CONFIG_CMD,
	449	CFFPS_LED_OFF);
ef9e1cdf	450	}
ef9e1cdf	451
2f8a855e EJ	452	static struct pmbus_driver_info ibm_cffps_info[] = {
	453	[cffps1] = {
	454	.pages = 1,
	455	.func[0] = PMBUS_HAVE_VIN \| PMBUS_HAVE_VOUT \| PMBUS_HAVE_IOUT \|
	456	PMBUS_HAVE_PIN \| PMBUS_HAVE_FAN12 \| PMBUS_HAVE_TEMP \|
	457	PMBUS_HAVE_TEMP2 \| PMBUS_HAVE_TEMP3 \|
	458	PMBUS_HAVE_STATUS_VOUT \| PMBUS_HAVE_STATUS_IOUT \|
	459	PMBUS_HAVE_STATUS_INPUT \| PMBUS_HAVE_STATUS_TEMP \|
	460	PMBUS_HAVE_STATUS_FAN12,
	461	.read_byte_data = ibm_cffps_read_byte_data,
	462	.read_word_data = ibm_cffps_read_word_data,
	463	},
	464	[cffps2] = {
	465	.pages = 2,
	466	.func[0] = PMBUS_HAVE_VIN \| PMBUS_HAVE_VOUT \| PMBUS_HAVE_IOUT \|
	467	PMBUS_HAVE_PIN \| PMBUS_HAVE_FAN12 \| PMBUS_HAVE_TEMP \|
	468	PMBUS_HAVE_TEMP2 \| PMBUS_HAVE_TEMP3 \|
	469	PMBUS_HAVE_STATUS_VOUT \| PMBUS_HAVE_STATUS_IOUT \|
	470	PMBUS_HAVE_STATUS_INPUT \| PMBUS_HAVE_STATUS_TEMP \|
1952d79a	471	PMBUS_HAVE_STATUS_FAN12 \| PMBUS_HAVE_VMON,
2f8a855e EJ	472	.func[1] = PMBUS_HAVE_VOUT \| PMBUS_HAVE_IOUT \|
	473	PMBUS_HAVE_TEMP \| PMBUS_HAVE_TEMP2 \| PMBUS_HAVE_TEMP3 \|
	474	PMBUS_HAVE_STATUS_VOUT \| PMBUS_HAVE_STATUS_IOUT,
	475	.read_byte_data = ibm_cffps_read_byte_data,
	476	.read_word_data = ibm_cffps_read_word_data,
	477	},
f69316d6 EJ	478	};
f69316d6 EJ	479
4471879a	480	static struct pmbus_platform_data ibm_cffps_pdata = {
f7a65218	481	.flags = PMBUS_SKIP_STATUS_CHECK \| PMBUS_NO_CAPABILITY,
4471879a EJ	482	};
4471879a EJ	483
dd431939	484	static int ibm_cffps_probe(struct i2c_client *client)
f69316d6	485	{
d6bb645a	486	int i, rc;
da806a17	487	enum versions vs = cffps_unknown;
d6bb645a EJ	488	struct dentry *debugfs;
	489	struct dentry *ibm_cffps_dir;
	490	struct ibm_cffps *psu;
2f8a855e	491	const void *md = of_device_get_match_data(&client->dev);
dd431939	492	const struct i2c_device_id *id;
2f8a855e	493
dd431939	494	if (md) {
2f8a855e	495	vs = (enum versions)md;
dd431939 SK	496	} else {
	497	id = i2c_match_id(ibm_cffps_id, client);
	498	if (id)
	499	vs = (enum versions)id->driver_data;
	500	}
da806a17 EJ	501
da806a17 EJ	502	if (vs == cffps_unknown) {
b1fbe673	503	u16 ccin_revision = 0;
da806a17 EJ	504	u16 ccin_version = CFFPS_CCIN_VERSION_1;
	505	int ccin = i2c_smbus_read_word_swapped(client, CFFPS_CCIN_CMD);
	506
b1fbe673 EJ	507	if (ccin > 0) {
b1fbe673 EJ	508	ccin_revision = FIELD_GET(CFFPS_CCIN_REVISION, ccin);
da806a17	509	ccin_version = FIELD_GET(CFFPS_CCIN_VERSION, ccin);
b1fbe673	510	}
da806a17 EJ	511
	512	switch (ccin_version) {
	513	default:
	514	case CFFPS_CCIN_VERSION_1:
	515	vs = cffps1;
	516	break;
	517	case CFFPS_CCIN_VERSION_2:
	518	vs = cffps2;
	519	break;
b1fbe673 EJ	520	case CFFPS_CCIN_VERSION_3:
	521	if (ccin_revision == CFFPS_CCIN_REVISION_LEGACY)
	522	vs = cffps1;
	523	else
	524	vs = cffps2;
	525	break;
da806a17 EJ	526	}
	527
	528	/* Set the client name to include the version number. */
	529	snprintf(client->name, I2C_NAME_SIZE, "cffps%d", vs + 1);
	530	}
d6bb645a	531
4471879a	532	client->dev.platform_data = &ibm_cffps_pdata;
dd431939	533	rc = pmbus_do_probe(client, &ibm_cffps_info[vs]);
d6bb645a EJ	534	if (rc)
	535	return rc;
	536
ef9e1cdf	537	/*
	538	* Don't fail the probe if there isn't enough memory for leds and
	539	* debugfs.
	540	*/
	541	psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
	542	if (!psu)
	543	return 0;
	544
2f8a855e	545	psu->version = vs;
ef9e1cdf	546	psu->client = client;
	547	mutex_init(&psu->input_history.update_lock);
	548	psu->input_history.last_update = jiffies - HZ;
	549
	550	ibm_cffps_create_led_class(psu);
	551
d6bb645a EJ	552	/* Don't fail the probe if we can't create debugfs */
	553	debugfs = pmbus_get_debugfs_dir(client);
	554	if (!debugfs)
	555	return 0;
	556
	557	ibm_cffps_dir = debugfs_create_dir(client->name, debugfs);
	558	if (!ibm_cffps_dir)
	559	return 0;
	560
d6bb645a EJ	561	for (i = 0; i < CFFPS_DEBUGFS_NUM_ENTRIES; ++i)
	562	psu->debugfs_entries[i] = i;
	563
	564	debugfs_create_file("input_history", 0444, ibm_cffps_dir,
	565	&psu->debugfs_entries[CFFPS_DEBUGFS_INPUT_HISTORY],
	566	&ibm_cffps_fops);
	567	debugfs_create_file("fru", 0444, ibm_cffps_dir,
	568	&psu->debugfs_entries[CFFPS_DEBUGFS_FRU],
	569	&ibm_cffps_fops);
	570	debugfs_create_file("part_number", 0444, ibm_cffps_dir,
	571	&psu->debugfs_entries[CFFPS_DEBUGFS_PN],
	572	&ibm_cffps_fops);
abe508b6 EJ	573	debugfs_create_file("header", 0444, ibm_cffps_dir,
	574	&psu->debugfs_entries[CFFPS_DEBUGFS_HEADER],
	575	&ibm_cffps_fops);
d6bb645a EJ	576	debugfs_create_file("serial_number", 0444, ibm_cffps_dir,
	577	&psu->debugfs_entries[CFFPS_DEBUGFS_SN],
	578	&ibm_cffps_fops);
abe508b6 EJ	579	debugfs_create_file("max_power_out", 0444, ibm_cffps_dir,
	580	&psu->debugfs_entries[CFFPS_DEBUGFS_MAX_POWER_OUT],
	581	&ibm_cffps_fops);
d6bb645a EJ	582	debugfs_create_file("ccin", 0444, ibm_cffps_dir,
	583	&psu->debugfs_entries[CFFPS_DEBUGFS_CCIN],
	584	&ibm_cffps_fops);
	585	debugfs_create_file("fw_version", 0444, ibm_cffps_dir,
	586	&psu->debugfs_entries[CFFPS_DEBUGFS_FW],
	587	&ibm_cffps_fops);
abe508b6 EJ	588	debugfs_create_file("on_off_config", 0644, ibm_cffps_dir,
	589	&psu->debugfs_entries[CFFPS_DEBUGFS_ON_OFF_CONFIG],
	590	&ibm_cffps_fops);
d6bb645a EJ	591
d6bb645a EJ	592	return 0;
f69316d6 EJ	593	}
	594
	595	static const struct i2c_device_id ibm_cffps_id[] = {
2f8a855e EJ	596	{ "ibm_cffps1", cffps1 },
2f8a855e EJ	597	{ "ibm_cffps2", cffps2 },
da806a17	598	{ "ibm_cffps", cffps_unknown },
f69316d6 EJ	599	{}
	600	};
	601	MODULE_DEVICE_TABLE(i2c, ibm_cffps_id);
	602
	603	static const struct of_device_id ibm_cffps_of_match[] = {
2f8a855e EJ	604	{
	605	.compatible = "ibm,cffps1",
	606	.data = (void *)cffps1
	607	},
	608	{
	609	.compatible = "ibm,cffps2",
	610	.data = (void *)cffps2
	611	},
da806a17 EJ	612	{
	613	.compatible = "ibm,cffps",
	614	.data = (void *)cffps_unknown
	615	},
f69316d6 EJ	616	{}
	617	};
	618	MODULE_DEVICE_TABLE(of, ibm_cffps_of_match);
	619
	620	static struct i2c_driver ibm_cffps_driver = {
	621	.driver = {
	622	.name = "ibm-cffps",
	623	.of_match_table = ibm_cffps_of_match,
	624	},
dd431939	625	.probe_new = ibm_cffps_probe,
f69316d6 EJ	626	.id_table = ibm_cffps_id,
	627	};
	628
	629	module_i2c_driver(ibm_cffps_driver);
	630
	631	MODULE_AUTHOR("Eddie James");
	632	MODULE_DESCRIPTION("PMBus driver for IBM Common Form Factor power supplies");
	633	MODULE_LICENSE("GPL");
b94ca77e	634	MODULE_IMPORT_NS(PMBUS);