[linux-block.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_MFG_ID_CMD                        0x99
#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_MFG_ID,
	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_MFG_ID:
		cmd = CFFPS_MFG_ID_CMD;
		break;
	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);
		char mfg_id[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };

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

		rc = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, mfg_id);
		if (rc < 0) {
			dev_err(&client->dev, "Failed to read Manufacturer ID\n");
			return rc;
		}

		switch (ccin_version) {
		default:
		case CFFPS_CCIN_VERSION_1:
			if ((strncmp(mfg_id, "ACBE", 4) == 0) ||
				     (strncmp(mfg_id, "ARTE", 4) == 0))
				vs = cffps1;
			else
				vs = cffps2;
			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("mfg_id", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_MFG_ID],
			    &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
a111ec39	21	#define CFFPS_MFG_ID_CMD 0x99
d6bb645a EJ	22	#define CFFPS_FRU_CMD 0x9A
d6bb645a EJ	23	#define CFFPS_PN_CMD 0x9B
abe508b6	24	#define CFFPS_HEADER_CMD 0x9C
d6bb645a	25	#define CFFPS_SN_CMD 0x9E
abe508b6	26	#define CFFPS_MAX_POWER_OUT_CMD 0xA7
d6bb645a	27	#define CFFPS_CCIN_CMD 0xBD
2f8a855e EJ	28	#define CFFPS_FW_CMD 0xFA
	29	#define CFFPS1_FW_NUM_BYTES 4
	30	#define CFFPS2_FW_NUM_WORDS 3
ef9e1cdf	31	#define CFFPS_SYS_CONFIG_CMD 0xDA
1952d79a	32	#define CFFPS_12VCS_VOUT_CMD 0xDE
d6bb645a EJ	33
	34	#define CFFPS_INPUT_HISTORY_CMD 0xD6
	35	#define CFFPS_INPUT_HISTORY_SIZE 100
	36
b1fbe673	37	#define CFFPS_CCIN_REVISION GENMASK(7, 0)
a111ec39	38	#define CFFPS_CCIN_REVISION_LEGACY 0xde
da806a17 EJ	39	#define CFFPS_CCIN_VERSION GENMASK(15, 8)
	40	#define CFFPS_CCIN_VERSION_1 0x2b
	41	#define CFFPS_CCIN_VERSION_2 0x2e
b1fbe673	42	#define CFFPS_CCIN_VERSION_3 0x51
da806a17	43
f69316d6 EJ	44	/* STATUS_MFR_SPECIFIC bits */
	45	#define CFFPS_MFR_FAN_FAULT BIT(0)
	46	#define CFFPS_MFR_THERMAL_FAULT BIT(1)
	47	#define CFFPS_MFR_OV_FAULT BIT(2)
	48	#define CFFPS_MFR_UV_FAULT BIT(3)
	49	#define CFFPS_MFR_PS_KILL BIT(4)
	50	#define CFFPS_MFR_OC_FAULT BIT(5)
	51	#define CFFPS_MFR_VAUX_FAULT BIT(6)
	52	#define CFFPS_MFR_CURRENT_SHARE_WARNING BIT(7)
	53
76b72736 BW	54	#define CFFPS_LED_BLINK (BIT(0) \| BIT(6))
	55	#define CFFPS_LED_ON (BIT(1) \| BIT(6))
	56	#define CFFPS_LED_OFF (BIT(2) \| BIT(6))
ef9e1cdf	57	#define CFFPS_BLINK_RATE_MS 250
ef9e1cdf	58
d6bb645a EJ	59	enum {
d6bb645a EJ	60	CFFPS_DEBUGFS_INPUT_HISTORY = 0,
a111ec39	61	CFFPS_DEBUGFS_MFG_ID,
d6bb645a EJ	62	CFFPS_DEBUGFS_FRU,
d6bb645a EJ	63	CFFPS_DEBUGFS_PN,
abe508b6	64	CFFPS_DEBUGFS_HEADER,
d6bb645a	65	CFFPS_DEBUGFS_SN,
abe508b6	66	CFFPS_DEBUGFS_MAX_POWER_OUT,
d6bb645a EJ	67	CFFPS_DEBUGFS_CCIN,
d6bb645a EJ	68	CFFPS_DEBUGFS_FW,
abe508b6	69	CFFPS_DEBUGFS_ON_OFF_CONFIG,
d6bb645a EJ	70	CFFPS_DEBUGFS_NUM_ENTRIES
	71	};
	72
da806a17	73	enum versions { cffps1, cffps2, cffps_unknown };
2f8a855e	74
d6bb645a EJ	75	struct ibm_cffps_input_history {
	76	struct mutex update_lock;
	77	unsigned long last_update;
	78
	79	u8 byte_count;
	80	u8 data[CFFPS_INPUT_HISTORY_SIZE];
	81	};
	82
	83	struct ibm_cffps {
2f8a855e	84	enum versions version;
d6bb645a EJ	85	struct i2c_client *client;
	86
	87	struct ibm_cffps_input_history input_history;
	88
	89	int debugfs_entries[CFFPS_DEBUGFS_NUM_ENTRIES];
ef9e1cdf	90
	91	char led_name[32];
	92	u8 led_state;
	93	struct led_classdev led;
d6bb645a EJ	94	};
d6bb645a EJ	95
dd431939 SK	96	static const struct i2c_device_id ibm_cffps_id[];
dd431939 SK	97
d6bb645a EJ	98	#define to_psu(x, y) container_of((x), struct ibm_cffps, debugfs_entries[(y)])
	99
	100	static ssize_t ibm_cffps_read_input_history(struct ibm_cffps *psu,
	101	char __user *buf, size_t count,
	102	loff_t *ppos)
	103	{
	104	int rc;
	105	u8 msgbuf0[1] = { CFFPS_INPUT_HISTORY_CMD };
	106	u8 msgbuf1[CFFPS_INPUT_HISTORY_SIZE + 1] = { 0 };
	107	struct i2c_msg msg[2] = {
	108	{
	109	.addr = psu->client->addr,
	110	.flags = psu->client->flags,
	111	.len = 1,
	112	.buf = msgbuf0,
	113	}, {
	114	.addr = psu->client->addr,
	115	.flags = psu->client->flags \| I2C_M_RD,
	116	.len = CFFPS_INPUT_HISTORY_SIZE + 1,
	117	.buf = msgbuf1,
	118	},
	119	};
	120
	121	if (!*ppos) {
	122	mutex_lock(&psu->input_history.update_lock);
	123	if (time_after(jiffies, psu->input_history.last_update + HZ)) {
	124	/*
	125	* Use a raw i2c transfer, since we need more bytes
	126	* than Linux I2C supports through smbus xfr (only 32).
	127	*/
	128	rc = i2c_transfer(psu->client->adapter, msg, 2);
	129	if (rc < 0) {
	130	mutex_unlock(&psu->input_history.update_lock);
	131	return rc;
	132	}
	133
	134	psu->input_history.byte_count = msgbuf1[0];
	135	memcpy(psu->input_history.data, &msgbuf1[1],
	136	CFFPS_INPUT_HISTORY_SIZE);
	137	psu->input_history.last_update = jiffies;
	138	}
	139
	140	mutex_unlock(&psu->input_history.update_lock);
	141	}
	142
	143	return simple_read_from_buffer(buf, count, ppos,
	144	psu->input_history.data,
	145	psu->input_history.byte_count);
	146	}
	147
abe508b6 EJ	148	static ssize_t ibm_cffps_debugfs_read(struct file file, char __user buf,
abe508b6 EJ	149	size_t count, loff_t *ppos)
d6bb645a EJ	150	{
	151	u8 cmd;
	152	int i, rc;
	153	int *idxp = file->private_data;
	154	int idx = *idxp;
	155	struct ibm_cffps *psu = to_psu(idxp, idx);
abe508b6	156	char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
d6bb645a	157
43f33b6e	158	pmbus_set_page(psu->client, 0, 0xff);
2f8a855e	159
d6bb645a EJ	160	switch (idx) {
	161	case CFFPS_DEBUGFS_INPUT_HISTORY:
	162	return ibm_cffps_read_input_history(psu, buf, count, ppos);
a111ec39 BW	163	case CFFPS_DEBUGFS_MFG_ID:
	164	cmd = CFFPS_MFG_ID_CMD;
	165	break;
d6bb645a EJ	166	case CFFPS_DEBUGFS_FRU:
	167	cmd = CFFPS_FRU_CMD;
	168	break;
	169	case CFFPS_DEBUGFS_PN:
	170	cmd = CFFPS_PN_CMD;
	171	break;
abe508b6 EJ	172	case CFFPS_DEBUGFS_HEADER:
	173	cmd = CFFPS_HEADER_CMD;
	174	break;
d6bb645a EJ	175	case CFFPS_DEBUGFS_SN:
	176	cmd = CFFPS_SN_CMD;
	177	break;
abe508b6	178	case CFFPS_DEBUGFS_MAX_POWER_OUT:
f067d558 BW	179	if (psu->version == cffps1) {
	180	rc = i2c_smbus_read_word_swapped(psu->client,
	181	CFFPS_MAX_POWER_OUT_CMD);
	182	} else {
	183	rc = i2c_smbus_read_word_data(psu->client,
	184	CFFPS_MAX_POWER_OUT_CMD);
	185	}
	186
abe508b6 EJ	187	if (rc < 0)
	188	return rc;
	189
	190	rc = snprintf(data, I2C_SMBUS_BLOCK_MAX, "%d", rc);
	191	goto done;
d6bb645a EJ	192	case CFFPS_DEBUGFS_CCIN:
	193	rc = i2c_smbus_read_word_swapped(psu->client, CFFPS_CCIN_CMD);
	194	if (rc < 0)
	195	return rc;
	196
	197	rc = snprintf(data, 5, "%04X", rc);
	198	goto done;
	199	case CFFPS_DEBUGFS_FW:
2f8a855e EJ	200	switch (psu->version) {
	201	case cffps1:
	202	for (i = 0; i < CFFPS1_FW_NUM_BYTES; ++i) {
	203	rc = i2c_smbus_read_byte_data(psu->client,
	204	CFFPS_FW_CMD +
	205	i);
	206	if (rc < 0)
	207	return rc;
	208
	209	snprintf(&data[i * 2], 3, "%02X", rc);
	210	}
d6bb645a	211
2f8a855e EJ	212	rc = i * 2;
	213	break;
	214	case cffps2:
	215	for (i = 0; i < CFFPS2_FW_NUM_WORDS; ++i) {
	216	rc = i2c_smbus_read_word_data(psu->client,
	217	CFFPS_FW_CMD +
	218	i);
	219	if (rc < 0)
	220	return rc;
	221
	222	snprintf(&data[i * 4], 5, "%04X", rc);
	223	}
d6bb645a	224
2f8a855e EJ	225	rc = i * 4;
	226	break;
	227	default:
	228	return -EOPNOTSUPP;
	229	}
d6bb645a	230	goto done;
abe508b6 EJ	231	case CFFPS_DEBUGFS_ON_OFF_CONFIG:
	232	rc = i2c_smbus_read_byte_data(psu->client,
	233	PMBUS_ON_OFF_CONFIG);
	234	if (rc < 0)
	235	return rc;
	236
	237	rc = snprintf(data, 3, "%02x", rc);
	238	goto done;
d6bb645a EJ	239	default:
	240	return -EINVAL;
	241	}
	242
	243	rc = i2c_smbus_read_block_data(psu->client, cmd, data);
	244	if (rc < 0)
	245	return rc;
	246
	247	done:
	248	data[rc] = '\n';
	249	rc += 2;
	250
	251	return simple_read_from_buffer(buf, count, ppos, data, rc);
	252	}
	253
abe508b6 EJ	254	static ssize_t ibm_cffps_debugfs_write(struct file *file,
	255	const char __user *buf, size_t count,
	256	loff_t *ppos)
	257	{
	258	u8 data;
	259	ssize_t rc;
	260	int *idxp = file->private_data;
	261	int idx = *idxp;
	262	struct ibm_cffps *psu = to_psu(idxp, idx);
	263
	264	switch (idx) {
	265	case CFFPS_DEBUGFS_ON_OFF_CONFIG:
43f33b6e	266	pmbus_set_page(psu->client, 0, 0xff);
abe508b6 EJ	267
abe508b6 EJ	268	rc = simple_write_to_buffer(&data, 1, ppos, buf, count);
d9c8ae69	269	if (rc <= 0)
abe508b6 EJ	270	return rc;
	271
	272	rc = i2c_smbus_write_byte_data(psu->client,
	273	PMBUS_ON_OFF_CONFIG, data);
	274	if (rc)
	275	return rc;
	276
	277	rc = 1;
	278	break;
	279	default:
	280	return -EINVAL;
	281	}
	282
	283	return rc;
	284	}
	285
d6bb645a EJ	286	static const struct file_operations ibm_cffps_fops = {
d6bb645a EJ	287	.llseek = noop_llseek,
abe508b6 EJ	288	.read = ibm_cffps_debugfs_read,
abe508b6 EJ	289	.write = ibm_cffps_debugfs_write,
d6bb645a EJ	290	.open = simple_open,
	291	};
	292
f69316d6 EJ	293	static int ibm_cffps_read_byte_data(struct i2c_client *client, int page,
	294	int reg)
	295	{
	296	int rc, mfr;
	297
	298	switch (reg) {
	299	case PMBUS_STATUS_VOUT:
	300	case PMBUS_STATUS_IOUT:
	301	case PMBUS_STATUS_TEMPERATURE:
	302	case PMBUS_STATUS_FAN_12:
	303	rc = pmbus_read_byte_data(client, page, reg);
	304	if (rc < 0)
	305	return rc;
	306
	307	mfr = pmbus_read_byte_data(client, page,
	308	PMBUS_STATUS_MFR_SPECIFIC);
	309	if (mfr < 0)
	310	/*
	311	* Return the status register instead of an error,
	312	* since we successfully read status.
	313	*/
	314	return rc;
	315
	316	/* Add MFR_SPECIFIC bits to the standard pmbus status regs. */
	317	if (reg == PMBUS_STATUS_FAN_12) {
	318	if (mfr & CFFPS_MFR_FAN_FAULT)
	319	rc \|= PB_FAN_FAN1_FAULT;
	320	} else if (reg == PMBUS_STATUS_TEMPERATURE) {
	321	if (mfr & CFFPS_MFR_THERMAL_FAULT)
	322	rc \|= PB_TEMP_OT_FAULT;
	323	} else if (reg == PMBUS_STATUS_VOUT) {
	324	if (mfr & (CFFPS_MFR_OV_FAULT \| CFFPS_MFR_VAUX_FAULT))
	325	rc \|= PB_VOLTAGE_OV_FAULT;
	326	if (mfr & CFFPS_MFR_UV_FAULT)
	327	rc \|= PB_VOLTAGE_UV_FAULT;
	328	} else if (reg == PMBUS_STATUS_IOUT) {
	329	if (mfr & CFFPS_MFR_OC_FAULT)
	330	rc \|= PB_IOUT_OC_FAULT;
	331	if (mfr & CFFPS_MFR_CURRENT_SHARE_WARNING)
	332	rc \|= PB_CURRENT_SHARE_FAULT;
	333	}
	334	break;
	335	default:
	336	rc = -ENODATA;
	337	break;
	338	}
	339
	340	return rc;
	341	}
	342
	343	static int ibm_cffps_read_word_data(struct i2c_client *client, int page,
43f33b6e	344	int phase, int reg)
f69316d6 EJ	345	{
	346	int rc, mfr;
	347
	348	switch (reg) {
	349	case PMBUS_STATUS_WORD:
43f33b6e	350	rc = pmbus_read_word_data(client, page, phase, reg);
f69316d6 EJ	351	if (rc < 0)
	352	return rc;
	353
	354	mfr = pmbus_read_byte_data(client, page,
	355	PMBUS_STATUS_MFR_SPECIFIC);
	356	if (mfr < 0)
	357	/*
	358	* Return the status register instead of an error,
	359	* since we successfully read status.
	360	*/
	361	return rc;
	362
	363	if (mfr & CFFPS_MFR_PS_KILL)
	364	rc \|= PB_STATUS_OFF;
	365	break;
1952d79a	366	case PMBUS_VIRT_READ_VMON:
43f33b6e GR	367	rc = pmbus_read_word_data(client, page, phase,
43f33b6e GR	368	CFFPS_12VCS_VOUT_CMD);
1952d79a	369	break;
f69316d6 EJ	370	default:
	371	rc = -ENODATA;
	372	break;
	373	}
	374
	375	return rc;
	376	}
	377
9861ff95 EJ	378	static int ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
9861ff95 EJ	379	enum led_brightness brightness)
ef9e1cdf	380	{
ef9e1cdf	381	int rc;
92b39ad4	382	u8 next_led_state;
ef9e1cdf	383	struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
	384
	385	if (brightness == LED_OFF) {
92b39ad4	386	next_led_state = CFFPS_LED_OFF;
ef9e1cdf	387	} else {
ef9e1cdf	388	brightness = LED_FULL;
92b39ad4	389
ef9e1cdf	390	if (psu->led_state != CFFPS_LED_BLINK)
92b39ad4 EJ	391	next_led_state = CFFPS_LED_ON;
	392	else
	393	next_led_state = CFFPS_LED_BLINK;
ef9e1cdf	394	}
ef9e1cdf	395
92b39ad4 EJ	396	dev_dbg(&psu->client->dev, "LED brightness set: %d. Command: %d.\n",
	397	brightness, next_led_state);
	398
43f33b6e	399	pmbus_set_page(psu->client, 0, 0xff);
2f8a855e	400
ef9e1cdf	401	rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
92b39ad4	402	next_led_state);
ef9e1cdf	403	if (rc < 0)
9861ff95	404	return rc;
ef9e1cdf	405
92b39ad4	406	psu->led_state = next_led_state;
ef9e1cdf	407	led_cdev->brightness = brightness;
9861ff95 EJ	408
9861ff95 EJ	409	return 0;
ef9e1cdf	410	}
	411
	412	static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev,
	413	unsigned long *delay_on,
	414	unsigned long *delay_off)
	415	{
	416	int rc;
	417	struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
	418
92b39ad4	419	dev_dbg(&psu->client->dev, "LED blink set.\n");
ef9e1cdf	420
43f33b6e	421	pmbus_set_page(psu->client, 0, 0xff);
2f8a855e	422
ef9e1cdf	423	rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
	424	CFFPS_LED_BLINK);
	425	if (rc < 0)
	426	return rc;
	427
92b39ad4 EJ	428	psu->led_state = CFFPS_LED_BLINK;
92b39ad4 EJ	429	led_cdev->brightness = LED_FULL;
ef9e1cdf	430	*delay_on = CFFPS_BLINK_RATE_MS;
	431	*delay_off = CFFPS_BLINK_RATE_MS;
	432
	433	return 0;
	434	}
	435
	436	static void ibm_cffps_create_led_class(struct ibm_cffps *psu)
	437	{
	438	int rc;
	439	struct i2c_client *client = psu->client;
	440	struct device *dev = &client->dev;
	441
	442	snprintf(psu->led_name, sizeof(psu->led_name), "%s-%02x", client->name,
	443	client->addr);
	444	psu->led.name = psu->led_name;
	445	psu->led.max_brightness = LED_FULL;
9861ff95	446	psu->led.brightness_set_blocking = ibm_cffps_led_brightness_set;
ef9e1cdf	447	psu->led.blink_set = ibm_cffps_led_blink_set;
	448
	449	rc = devm_led_classdev_register(dev, &psu->led);
	450	if (rc)
	451	dev_warn(dev, "failed to register led class: %d\n", rc);
74a71a83 EJ	452	else
	453	i2c_smbus_write_byte_data(client, CFFPS_SYS_CONFIG_CMD,
	454	CFFPS_LED_OFF);
ef9e1cdf	455	}
ef9e1cdf	456
2f8a855e EJ	457	static struct pmbus_driver_info ibm_cffps_info[] = {
	458	[cffps1] = {
	459	.pages = 1,
	460	.func[0] = PMBUS_HAVE_VIN \| PMBUS_HAVE_VOUT \| PMBUS_HAVE_IOUT \|
	461	PMBUS_HAVE_PIN \| PMBUS_HAVE_FAN12 \| PMBUS_HAVE_TEMP \|
	462	PMBUS_HAVE_TEMP2 \| PMBUS_HAVE_TEMP3 \|
	463	PMBUS_HAVE_STATUS_VOUT \| PMBUS_HAVE_STATUS_IOUT \|
	464	PMBUS_HAVE_STATUS_INPUT \| PMBUS_HAVE_STATUS_TEMP \|
	465	PMBUS_HAVE_STATUS_FAN12,
	466	.read_byte_data = ibm_cffps_read_byte_data,
	467	.read_word_data = ibm_cffps_read_word_data,
	468	},
	469	[cffps2] = {
	470	.pages = 2,
	471	.func[0] = PMBUS_HAVE_VIN \| PMBUS_HAVE_VOUT \| PMBUS_HAVE_IOUT \|
	472	PMBUS_HAVE_PIN \| PMBUS_HAVE_FAN12 \| PMBUS_HAVE_TEMP \|
	473	PMBUS_HAVE_TEMP2 \| PMBUS_HAVE_TEMP3 \|
	474	PMBUS_HAVE_STATUS_VOUT \| PMBUS_HAVE_STATUS_IOUT \|
	475	PMBUS_HAVE_STATUS_INPUT \| PMBUS_HAVE_STATUS_TEMP \|
1952d79a	476	PMBUS_HAVE_STATUS_FAN12 \| PMBUS_HAVE_VMON,
2f8a855e EJ	477	.func[1] = PMBUS_HAVE_VOUT \| PMBUS_HAVE_IOUT \|
	478	PMBUS_HAVE_TEMP \| PMBUS_HAVE_TEMP2 \| PMBUS_HAVE_TEMP3 \|
	479	PMBUS_HAVE_STATUS_VOUT \| PMBUS_HAVE_STATUS_IOUT,
	480	.read_byte_data = ibm_cffps_read_byte_data,
	481	.read_word_data = ibm_cffps_read_word_data,
	482	},
f69316d6 EJ	483	};
f69316d6 EJ	484
4471879a	485	static struct pmbus_platform_data ibm_cffps_pdata = {
f7a65218	486	.flags = PMBUS_SKIP_STATUS_CHECK \| PMBUS_NO_CAPABILITY,
4471879a EJ	487	};
4471879a EJ	488
dd431939	489	static int ibm_cffps_probe(struct i2c_client *client)
f69316d6	490	{
d6bb645a	491	int i, rc;
da806a17	492	enum versions vs = cffps_unknown;
d6bb645a EJ	493	struct dentry *debugfs;
	494	struct dentry *ibm_cffps_dir;
	495	struct ibm_cffps *psu;
2f8a855e	496	const void *md = of_device_get_match_data(&client->dev);
dd431939	497	const struct i2c_device_id *id;
2f8a855e	498
dd431939	499	if (md) {
2f8a855e	500	vs = (enum versions)md;
dd431939 SK	501	} else {
	502	id = i2c_match_id(ibm_cffps_id, client);
	503	if (id)
	504	vs = (enum versions)id->driver_data;
	505	}
da806a17 EJ	506
da806a17 EJ	507	if (vs == cffps_unknown) {
b1fbe673	508	u16 ccin_revision = 0;
da806a17 EJ	509	u16 ccin_version = CFFPS_CCIN_VERSION_1;
da806a17 EJ	510	int ccin = i2c_smbus_read_word_swapped(client, CFFPS_CCIN_CMD);
8a5cfcfa	511	char mfg_id[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
da806a17	512
b1fbe673 EJ	513	if (ccin > 0) {
b1fbe673 EJ	514	ccin_revision = FIELD_GET(CFFPS_CCIN_REVISION, ccin);
da806a17	515	ccin_version = FIELD_GET(CFFPS_CCIN_VERSION, ccin);
b1fbe673	516	}
da806a17	517
8a5cfcfa BW	518	rc = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, mfg_id);
	519	if (rc < 0) {
	520	dev_err(&client->dev, "Failed to read Manufacturer ID\n");
	521	return rc;
	522	}
	523
da806a17 EJ	524	switch (ccin_version) {
	525	default:
	526	case CFFPS_CCIN_VERSION_1:
8a5cfcfa BW	527	if ((strncmp(mfg_id, "ACBE", 4) == 0) \|\|
	528	(strncmp(mfg_id, "ARTE", 4) == 0))
	529	vs = cffps1;
	530	else
	531	vs = cffps2;
da806a17 EJ	532	break;
	533	case CFFPS_CCIN_VERSION_2:
	534	vs = cffps2;
	535	break;
b1fbe673 EJ	536	case CFFPS_CCIN_VERSION_3:
	537	if (ccin_revision == CFFPS_CCIN_REVISION_LEGACY)
	538	vs = cffps1;
	539	else
	540	vs = cffps2;
	541	break;
da806a17 EJ	542	}
	543
	544	/* Set the client name to include the version number. */
	545	snprintf(client->name, I2C_NAME_SIZE, "cffps%d", vs + 1);
	546	}
d6bb645a	547
4471879a	548	client->dev.platform_data = &ibm_cffps_pdata;
dd431939	549	rc = pmbus_do_probe(client, &ibm_cffps_info[vs]);
d6bb645a EJ	550	if (rc)
	551	return rc;
	552
ef9e1cdf	553	/*
	554	* Don't fail the probe if there isn't enough memory for leds and
	555	* debugfs.
	556	*/
	557	psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
	558	if (!psu)
	559	return 0;
	560
2f8a855e	561	psu->version = vs;
ef9e1cdf	562	psu->client = client;
	563	mutex_init(&psu->input_history.update_lock);
	564	psu->input_history.last_update = jiffies - HZ;
	565
	566	ibm_cffps_create_led_class(psu);
	567
d6bb645a EJ	568	/* Don't fail the probe if we can't create debugfs */
	569	debugfs = pmbus_get_debugfs_dir(client);
	570	if (!debugfs)
	571	return 0;
	572
	573	ibm_cffps_dir = debugfs_create_dir(client->name, debugfs);
	574	if (!ibm_cffps_dir)
	575	return 0;
	576
d6bb645a EJ	577	for (i = 0; i < CFFPS_DEBUGFS_NUM_ENTRIES; ++i)
	578	psu->debugfs_entries[i] = i;
	579
	580	debugfs_create_file("input_history", 0444, ibm_cffps_dir,
	581	&psu->debugfs_entries[CFFPS_DEBUGFS_INPUT_HISTORY],
	582	&ibm_cffps_fops);
a111ec39 BW	583	debugfs_create_file("mfg_id", 0444, ibm_cffps_dir,
	584	&psu->debugfs_entries[CFFPS_DEBUGFS_MFG_ID],
	585	&ibm_cffps_fops);
d6bb645a EJ	586	debugfs_create_file("fru", 0444, ibm_cffps_dir,
	587	&psu->debugfs_entries[CFFPS_DEBUGFS_FRU],
	588	&ibm_cffps_fops);
	589	debugfs_create_file("part_number", 0444, ibm_cffps_dir,
	590	&psu->debugfs_entries[CFFPS_DEBUGFS_PN],
	591	&ibm_cffps_fops);
abe508b6 EJ	592	debugfs_create_file("header", 0444, ibm_cffps_dir,
	593	&psu->debugfs_entries[CFFPS_DEBUGFS_HEADER],
	594	&ibm_cffps_fops);
d6bb645a EJ	595	debugfs_create_file("serial_number", 0444, ibm_cffps_dir,
	596	&psu->debugfs_entries[CFFPS_DEBUGFS_SN],
	597	&ibm_cffps_fops);
abe508b6 EJ	598	debugfs_create_file("max_power_out", 0444, ibm_cffps_dir,
	599	&psu->debugfs_entries[CFFPS_DEBUGFS_MAX_POWER_OUT],
	600	&ibm_cffps_fops);
d6bb645a EJ	601	debugfs_create_file("ccin", 0444, ibm_cffps_dir,
	602	&psu->debugfs_entries[CFFPS_DEBUGFS_CCIN],
	603	&ibm_cffps_fops);
	604	debugfs_create_file("fw_version", 0444, ibm_cffps_dir,
	605	&psu->debugfs_entries[CFFPS_DEBUGFS_FW],
	606	&ibm_cffps_fops);
abe508b6 EJ	607	debugfs_create_file("on_off_config", 0644, ibm_cffps_dir,
	608	&psu->debugfs_entries[CFFPS_DEBUGFS_ON_OFF_CONFIG],
	609	&ibm_cffps_fops);
d6bb645a EJ	610
d6bb645a EJ	611	return 0;
f69316d6 EJ	612	}
	613
	614	static const struct i2c_device_id ibm_cffps_id[] = {
2f8a855e EJ	615	{ "ibm_cffps1", cffps1 },
2f8a855e EJ	616	{ "ibm_cffps2", cffps2 },
da806a17	617	{ "ibm_cffps", cffps_unknown },
f69316d6 EJ	618	{}
	619	};
	620	MODULE_DEVICE_TABLE(i2c, ibm_cffps_id);
	621
	622	static const struct of_device_id ibm_cffps_of_match[] = {
2f8a855e EJ	623	{
	624	.compatible = "ibm,cffps1",
	625	.data = (void *)cffps1
	626	},
	627	{
	628	.compatible = "ibm,cffps2",
	629	.data = (void *)cffps2
	630	},
da806a17 EJ	631	{
	632	.compatible = "ibm,cffps",
	633	.data = (void *)cffps_unknown
	634	},
f69316d6 EJ	635	{}
	636	};
	637	MODULE_DEVICE_TABLE(of, ibm_cffps_of_match);
	638
	639	static struct i2c_driver ibm_cffps_driver = {
	640	.driver = {
	641	.name = "ibm-cffps",
	642	.of_match_table = ibm_cffps_of_match,
	643	},
dd431939	644	.probe_new = ibm_cffps_probe,
f69316d6 EJ	645	.id_table = ibm_cffps_id,
	646	};
	647
	648	module_i2c_driver(ibm_cffps_driver);
	649
	650	MODULE_AUTHOR("Eddie James");
	651	MODULE_DESCRIPTION("PMBus driver for IBM Common Form Factor power supplies");
	652	MODULE_LICENSE("GPL");
b94ca77e	653	MODULE_IMPORT_NS(PMBUS);