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linux/drivers/hwmon/pmbus/q54sj108a2.c
Rob Herring 39f034386f hwmon: Explicitly include correct DT includes 
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230714174607.4057185-1-robh@kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2023-08-21 06:04:29 -07:00

425 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for Delta modules, Q54SJ108A2 series 1/4 Brick DC/DC
* Regulated Power Module
*
* Copyright 2020 Delta LLC.
*/
#include <linux/debugfs.h>
#include <linux/i2c.h>
#include <linux/kstrtox.h>
#include <linux/module.h>
#include <linux/of.h>
#include "pmbus.h"
#define STORE_DEFAULT_ALL 0x11
#define ERASE_BLACKBOX_DATA 0xD1
#define READ_HISTORY_EVENT_NUMBER 0xD2
#define READ_HISTORY_EVENTS 0xE0
#define SET_HISTORY_EVENT_OFFSET 0xE1
#define PMBUS_FLASH_KEY_WRITE 0xEC
enum chips {
q54sj108a2
};
enum {
Q54SJ108A2_DEBUGFS_OPERATION = 0,
Q54SJ108A2_DEBUGFS_CLEARFAULT,
Q54SJ108A2_DEBUGFS_WRITEPROTECT,
Q54SJ108A2_DEBUGFS_STOREDEFAULT,
Q54SJ108A2_DEBUGFS_VOOV_RESPONSE,
Q54SJ108A2_DEBUGFS_IOOC_RESPONSE,
Q54SJ108A2_DEBUGFS_PMBUS_VERSION,
Q54SJ108A2_DEBUGFS_MFR_ID,
Q54SJ108A2_DEBUGFS_MFR_MODEL,
Q54SJ108A2_DEBUGFS_MFR_REVISION,
Q54SJ108A2_DEBUGFS_MFR_LOCATION,
Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE,
Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET,
Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET,
Q54SJ108A2_DEBUGFS_BLACKBOX_READ,
Q54SJ108A2_DEBUGFS_FLASH_KEY,
Q54SJ108A2_DEBUGFS_NUM_ENTRIES
};
struct q54sj108a2_data {
enum chips chip;
struct i2c_client *client;
int debugfs_entries[Q54SJ108A2_DEBUGFS_NUM_ENTRIES];
};
#define to_psu(x, y) container_of((x), struct q54sj108a2_data, debugfs_entries[(y)])
static struct pmbus_driver_info q54sj108a2_info[] = {
[q54sj108a2] = {
.pages = 1,
/* Source : Delta Q54SJ108A2 */
.format[PSC_TEMPERATURE] = linear,
.format[PSC_VOLTAGE_IN] = linear,
.format[PSC_CURRENT_OUT] = linear,
.func[0] = PMBUS_HAVE_VIN |
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_STATUS_INPUT,
},
};
static ssize_t q54sj108a2_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
int rc;
int *idxp = file->private_data;
int idx = *idxp;
struct q54sj108a2_data *psu = to_psu(idxp, idx);
char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
char data_char[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
char *res;
switch (idx) {
case Q54SJ108A2_DEBUGFS_OPERATION:
rc = i2c_smbus_read_byte_data(psu->client, PMBUS_OPERATION);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_WRITEPROTECT:
rc = i2c_smbus_read_byte_data(psu->client, PMBUS_WRITE_PROTECT);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_VOOV_RESPONSE:
rc = i2c_smbus_read_byte_data(psu->client, PMBUS_VOUT_OV_FAULT_RESPONSE);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_IOOC_RESPONSE:
rc = i2c_smbus_read_byte_data(psu->client, PMBUS_IOUT_OC_FAULT_RESPONSE);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_PMBUS_VERSION:
rc = i2c_smbus_read_byte_data(psu->client, PMBUS_REVISION);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_MFR_ID:
rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_ID, data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_MFR_MODEL:
rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_MODEL, data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_MFR_REVISION:
rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_REVISION, data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_MFR_LOCATION:
rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_LOCATION, data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET:
rc = i2c_smbus_read_byte_data(psu->client, READ_HISTORY_EVENT_NUMBER);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_BLACKBOX_READ:
rc = i2c_smbus_read_block_data(psu->client, READ_HISTORY_EVENTS, data);
if (rc < 0)
return rc;
res = bin2hex(data, data_char, 32);
rc = res - data;
break;
case Q54SJ108A2_DEBUGFS_FLASH_KEY:
rc = i2c_smbus_read_block_data(psu->client, PMBUS_FLASH_KEY_WRITE, data);
if (rc < 0)
return rc;
res = bin2hex(data, data_char, 4);
rc = res - data;
break;
default:
return -EINVAL;
}
data[rc] = '\n';
rc += 2;
return simple_read_from_buffer(buf, count, ppos, data, rc);
}
static ssize_t q54sj108a2_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
u8 flash_key[4];
u8 dst_data;
ssize_t rc;
int *idxp = file->private_data;
int idx = *idxp;
struct q54sj108a2_data *psu = to_psu(idxp, idx);
rc = i2c_smbus_write_byte_data(psu->client, PMBUS_WRITE_PROTECT, 0);
if (rc)
return rc;
switch (idx) {
case Q54SJ108A2_DEBUGFS_OPERATION:
rc = kstrtou8_from_user(buf, count, 0, &dst_data);
if (rc < 0)
return rc;
rc = i2c_smbus_write_byte_data(psu->client, PMBUS_OPERATION, dst_data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_CLEARFAULT:
rc = i2c_smbus_write_byte(psu->client, PMBUS_CLEAR_FAULTS);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_STOREDEFAULT:
flash_key[0] = 0x7E;
flash_key[1] = 0x15;
flash_key[2] = 0xDC;
flash_key[3] = 0x42;
rc = i2c_smbus_write_block_data(psu->client, PMBUS_FLASH_KEY_WRITE, 4, flash_key);
if (rc < 0)
return rc;
rc = i2c_smbus_write_byte(psu->client, STORE_DEFAULT_ALL);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_VOOV_RESPONSE:
rc = kstrtou8_from_user(buf, count, 0, &dst_data);
if (rc < 0)
return rc;
rc = i2c_smbus_write_byte_data(psu->client, PMBUS_VOUT_OV_FAULT_RESPONSE, dst_data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_IOOC_RESPONSE:
rc = kstrtou8_from_user(buf, count, 0, &dst_data);
if (rc < 0)
return rc;
rc = i2c_smbus_write_byte_data(psu->client, PMBUS_IOUT_OC_FAULT_RESPONSE, dst_data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE:
rc = i2c_smbus_write_byte(psu->client, ERASE_BLACKBOX_DATA);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET:
rc = kstrtou8_from_user(buf, count, 0, &dst_data);
if (rc < 0)
return rc;
rc = i2c_smbus_write_byte_data(psu->client, SET_HISTORY_EVENT_OFFSET, dst_data);
if (rc < 0)
return rc;
break;
default:
return -EINVAL;
}
return count;
}
static const struct file_operations q54sj108a2_fops = {
.llseek = noop_llseek,
.read = q54sj108a2_debugfs_read,
.write = q54sj108a2_debugfs_write,
.open = simple_open,
};
static const struct i2c_device_id q54sj108a2_id[] = {
{ "q54sj108a2", q54sj108a2 },
{ },
};
MODULE_DEVICE_TABLE(i2c, q54sj108a2_id);
static int q54sj108a2_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
enum chips chip_id;
int ret, i;
struct dentry *debugfs;
struct dentry *q54sj108a2_dir;
struct q54sj108a2_data *psu;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_BLOCK_DATA))
return -ENODEV;
if (client->dev.of_node)
chip_id = (enum chips)(unsigned long)of_device_get_match_data(dev);
else
chip_id = i2c_match_id(q54sj108a2_id, client)->driver_data;
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
if (ret < 0) {
dev_err(&client->dev, "Failed to read Manufacturer ID\n");
return ret;
}
if (ret != 6 || strncmp(buf, "DELTA", 5)) {
buf[ret] = '\0';
dev_err(dev, "Unsupported Manufacturer ID '%s'\n", buf);
return -ENODEV;
}
/*
* The chips support reading PMBUS_MFR_MODEL.
*/
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
if (ret < 0) {
dev_err(dev, "Failed to read Manufacturer Model\n");
return ret;
}
if (ret != 14 || strncmp(buf, "Q54SJ108A2", 10)) {
buf[ret] = '\0';
dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf);
return -ENODEV;
}
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_REVISION, buf);
if (ret < 0) {
dev_err(dev, "Failed to read Manufacturer Revision\n");
return ret;
}
if (ret != 4 || buf[0] != 'S') {
buf[ret] = '\0';
dev_err(dev, "Unsupported Manufacturer Revision '%s'\n", buf);
return -ENODEV;
}
ret = pmbus_do_probe(client, &q54sj108a2_info[chip_id]);
if (ret)
return ret;
psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
if (!psu)
return 0;
psu->client = client;
debugfs = pmbus_get_debugfs_dir(client);
q54sj108a2_dir = debugfs_create_dir(client->name, debugfs);
for (i = 0; i < Q54SJ108A2_DEBUGFS_NUM_ENTRIES; ++i)
psu->debugfs_entries[i] = i;
debugfs_create_file("operation", 0644, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_OPERATION],
&q54sj108a2_fops);
debugfs_create_file("clear_fault", 0200, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_CLEARFAULT],
&q54sj108a2_fops);
debugfs_create_file("write_protect", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_WRITEPROTECT],
&q54sj108a2_fops);
debugfs_create_file("store_default", 0200, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_STOREDEFAULT],
&q54sj108a2_fops);
debugfs_create_file("vo_ov_response", 0644, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_VOOV_RESPONSE],
&q54sj108a2_fops);
debugfs_create_file("io_oc_response", 0644, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_IOOC_RESPONSE],
&q54sj108a2_fops);
debugfs_create_file("pmbus_revision", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_PMBUS_VERSION],
&q54sj108a2_fops);
debugfs_create_file("mfr_id", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_ID],
&q54sj108a2_fops);
debugfs_create_file("mfr_model", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_MODEL],
&q54sj108a2_fops);
debugfs_create_file("mfr_revision", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_REVISION],
&q54sj108a2_fops);
debugfs_create_file("mfr_location", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_LOCATION],
&q54sj108a2_fops);
debugfs_create_file("blackbox_erase", 0200, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE],
&q54sj108a2_fops);
debugfs_create_file("blackbox_read_offset", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET],
&q54sj108a2_fops);
debugfs_create_file("blackbox_set_offset", 0200, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET],
&q54sj108a2_fops);
debugfs_create_file("blackbox_read", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_READ],
&q54sj108a2_fops);
debugfs_create_file("flash_key", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_FLASH_KEY],
&q54sj108a2_fops);
return 0;
}
static const struct of_device_id q54sj108a2_of_match[] = {
{ .compatible = "delta,q54sj108a2", .data = (void *)q54sj108a2 },
{ },
};
MODULE_DEVICE_TABLE(of, q54sj108a2_of_match);
static struct i2c_driver q54sj108a2_driver = {
.driver = {
.name = "q54sj108a2",
.of_match_table = q54sj108a2_of_match,
},
.probe = q54sj108a2_probe,
.id_table = q54sj108a2_id,
};
module_i2c_driver(q54sj108a2_driver);
MODULE_AUTHOR("Xiao.Ma <xiao.mx.ma@deltaww.com>");
MODULE_DESCRIPTION("PMBus driver for Delta Q54SJ108A2 series modules");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(PMBUS);
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