diff options
Diffstat (limited to 'drivers/hwmon/pmbus/pfe3000.c')
| -rw-r--r-- | drivers/hwmon/pmbus/pfe3000.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/pfe3000.c b/drivers/hwmon/pmbus/pfe3000.c new file mode 100644 index 000000000000..0ee2453284ef --- /dev/null +++ b/drivers/hwmon/pmbus/pfe3000.c @@ -0,0 +1,133 @@ +/* + * Hardware monitoring driver for PFE3000 and compatibles + * Based on the zl6100 driver with the following copyright: + * + * Copyright (c) 2011 Ericsson AB. + * Copyright (c) 2012 Guenter Roeck + * Copyright 2004-present Facebook. All Rights Reserved. + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/ktime.h> +#include <linux/delay.h> +#include <linux/i2c/pmbus.h> +#include "pmbus.h" + +enum chips { PFE3000 }; + +struct pfe3000_data { + struct pmbus_driver_info info; +}; + +#define to_pfe3000_data(x) container_of(x, struct pfe3000_data, info) + +/* + * Other PowerOne device require a wait time; this is included in case + * it is necessary for future debugging. + */ + +#define PFE3000_WAIT_TIME 0 /* uS */ + +static ushort delay = PFE3000_WAIT_TIME; +module_param(delay, ushort, 0644); +MODULE_PARM_DESC(delay, "Delay between chip accesses in uS"); + + +static const struct i2c_device_id pfe3000_id[] = { + {"pfe3000", PFE3000 }, + {"pfe3000", 0}, + { } +}; +MODULE_DEVICE_TABLE(i2c, pfe3000_id); + +static struct pmbus_platform_data platform_data = { + .flags = PMBUS_SKIP_STATUS_CHECK +}; + +static int pfe3000_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct pfe3000_data *data; + struct pmbus_driver_info *info; + + data = devm_kzalloc(&client->dev, sizeof(struct pfe3000_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + info = &data->info; + info->pages = 7; + info->delay = delay; + + /* + * Skip extra status checks; this is required to read the + * VOUT_MODE register to determine the exponent to apply + * to the VOUT values. + */ + dev->platform_data = &platform_data; + + /* Make sure that the page isn't pointing elsewhere! */ + + i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0); + + /* + * It seems reasonable to just scan the device for supported + * values, but most drivers seem to jam these values in + * there, so that's what we'll do. + */ + + info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN | + PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | + 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_MFRDATA; + info->func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN | + PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | + PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12 | + PMBUS_HAVE_STATUS_INPUT; + info->func[2] = PMBUS_HAVE_VOUT; + info->func[4] = PMBUS_HAVE_VOUT; + info->func[5] = PMBUS_HAVE_VOUT; + info->func[6] = PMBUS_HAVE_VOUT; + + return pmbus_do_probe(client, id, info); +} + +static struct i2c_driver pfe3000_driver = { + .driver = { + .name = "pfe3000", + }, + .probe = pfe3000_probe, + .remove = pmbus_do_remove, + .id_table = pfe3000_id, +}; + +module_i2c_driver(pfe3000_driver); + +MODULE_AUTHOR("Kevin Lahey, based on work by Guenter Roeck"); +MODULE_DESCRIPTION("PMBus driver for PFE1100"); +MODULE_LICENSE("GPL"); |