hwmon: PMBus device driver
This driver adds support for hardware monitoring features of various PMBus devices. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
This commit is contained in:
Guenter Roeck
Родитель
06923f8442
Коммит
442aba7872
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@ -756,6 +756,31 @@ config SENSORS_PCF8591
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These devices are hard to detect and rarely found on mainstream
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hardware. If unsure, say N.
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config PMBUS
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tristate "PMBus support"
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depends on I2C && EXPERIMENTAL
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default n
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help
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Say yes here if you want to enable PMBus support.
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This driver can also be built as a module. If so, the module will
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be called pmbus_core.
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if PMBUS
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config SENSORS_PMBUS
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tristate "Generic PMBus devices"
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default n
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help
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If you say yes here you get hardware monitoring support for generic
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PMBus devices, including but not limited to BMR450, BMR451, BMR453,
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BMR454, and LTC2978.
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This driver can also be built as a module. If so, the module will
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be called pmbus.
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endif # PMBUS
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config SENSORS_SHT15
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tristate "Sensiron humidity and temperature sensors. SHT15 and compat."
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depends on GENERIC_GPIO
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@ -114,6 +114,10 @@ obj-$(CONFIG_SENSORS_W83L786NG) += w83l786ng.o
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obj-$(CONFIG_SENSORS_WM831X) += wm831x-hwmon.o
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obj-$(CONFIG_SENSORS_WM8350) += wm8350-hwmon.o
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# PMBus drivers
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obj-$(CONFIG_PMBUS) += pmbus_core.o
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obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o
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ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y)
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EXTRA_CFLAGS += -DDEBUG
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endif
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@ -0,0 +1,203 @@
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/*
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* Hardware monitoring driver for PMBus devices
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*
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* Copyright (c) 2010, 2011 Ericsson AB.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/mutex.h>
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#include <linux/i2c.h>
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#include "pmbus.h"
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/*
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* Find sensor groups and status registers on each page.
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*/
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static void pmbus_find_sensor_groups(struct i2c_client *client,
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struct pmbus_driver_info *info)
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{
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int page;
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/* Sensors detected on page 0 only */
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if (pmbus_check_word_register(client, 0, PMBUS_READ_VIN))
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info->func[0] |= PMBUS_HAVE_VIN;
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if (pmbus_check_word_register(client, 0, PMBUS_READ_VCAP))
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info->func[0] |= PMBUS_HAVE_VCAP;
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if (pmbus_check_word_register(client, 0, PMBUS_READ_IIN))
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info->func[0] |= PMBUS_HAVE_IIN;
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if (pmbus_check_word_register(client, 0, PMBUS_READ_PIN))
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info->func[0] |= PMBUS_HAVE_PIN;
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if (info->func[0]
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&& pmbus_check_byte_register(client, 0, PMBUS_STATUS_INPUT))
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info->func[0] |= PMBUS_HAVE_STATUS_INPUT;
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if (pmbus_check_word_register(client, 0, PMBUS_READ_FAN_SPEED_1)) {
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info->func[0] |= PMBUS_HAVE_FAN12;
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if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_FAN_12))
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info->func[0] |= PMBUS_HAVE_STATUS_FAN12;
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}
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if (pmbus_check_word_register(client, 0, PMBUS_READ_FAN_SPEED_3)) {
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info->func[0] |= PMBUS_HAVE_FAN34;
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if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_FAN_34))
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info->func[0] |= PMBUS_HAVE_STATUS_FAN34;
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}
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if (pmbus_check_word_register(client, 0, PMBUS_READ_TEMPERATURE_1)) {
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info->func[0] |= PMBUS_HAVE_TEMP;
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if (pmbus_check_byte_register(client, 0,
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PMBUS_STATUS_TEMPERATURE))
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info->func[0] |= PMBUS_HAVE_STATUS_TEMP;
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}
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/* Sensors detected on all pages */
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for (page = 0; page < info->pages; page++) {
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if (pmbus_check_word_register(client, page, PMBUS_READ_VOUT)) {
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info->func[page] |= PMBUS_HAVE_VOUT;
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if (pmbus_check_byte_register(client, page,
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PMBUS_STATUS_VOUT))
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info->func[page] |= PMBUS_HAVE_STATUS_VOUT;
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}
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if (pmbus_check_word_register(client, page, PMBUS_READ_IOUT)) {
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info->func[page] |= PMBUS_HAVE_IOUT;
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if (pmbus_check_byte_register(client, 0,
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PMBUS_STATUS_IOUT))
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info->func[page] |= PMBUS_HAVE_STATUS_IOUT;
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}
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if (pmbus_check_word_register(client, page, PMBUS_READ_POUT))
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info->func[page] |= PMBUS_HAVE_POUT;
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}
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}
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/*
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* Identify chip parameters.
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*/
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static int pmbus_identify(struct i2c_client *client,
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struct pmbus_driver_info *info)
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{
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if (!info->pages) {
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/*
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* Check if the PAGE command is supported. If it is,
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* keep setting the page number until it fails or until the
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* maximum number of pages has been reached. Assume that
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* this is the number of pages supported by the chip.
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*/
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if (pmbus_check_byte_register(client, 0, PMBUS_PAGE)) {
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int page;
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for (page = 1; page < PMBUS_PAGES; page++) {
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if (pmbus_set_page(client, page) < 0)
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break;
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}
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pmbus_set_page(client, 0);
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info->pages = page;
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} else {
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info->pages = 1;
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}
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}
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/*
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* We should check if the COEFFICIENTS register is supported.
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* If it is, and the chip is configured for direct mode, we can read
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* the coefficients from the chip, one set per group of sensor
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* registers.
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*
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* To do this, we will need access to a chip which actually supports the
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* COEFFICIENTS command, since the command is too complex to implement
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* without testing it.
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*/
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/* Try to find sensor groups */
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pmbus_find_sensor_groups(client, info);
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return 0;
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}
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static int pmbus_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct pmbus_driver_info *info;
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int ret;
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info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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info->pages = id->driver_data;
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info->identify = pmbus_identify;
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ret = pmbus_do_probe(client, id, info);
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if (ret < 0)
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goto out;
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return 0;
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out:
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kfree(info);
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return ret;
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}
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static int pmbus_remove(struct i2c_client *client)
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{
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int ret;
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const struct pmbus_driver_info *info;
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info = pmbus_get_driver_info(client);
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ret = pmbus_do_remove(client);
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kfree(info);
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return ret;
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}
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/*
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* Use driver_data to set the number of pages supported by the chip.
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*/
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static const struct i2c_device_id pmbus_id[] = {
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{"bmr450", 1},
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{"bmr451", 1},
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{"bmr453", 1},
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{"bmr454", 1},
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{"ltc2978", 8},
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{"pmbus", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, pmbus_id);
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/* This is the driver that will be inserted */
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static struct i2c_driver pmbus_driver = {
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.driver = {
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.name = "pmbus",
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},
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.probe = pmbus_probe,
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.remove = pmbus_remove,
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.id_table = pmbus_id,
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};
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static int __init pmbus_init(void)
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{
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return i2c_add_driver(&pmbus_driver);
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}
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static void __exit pmbus_exit(void)
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{
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i2c_del_driver(&pmbus_driver);
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}
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MODULE_AUTHOR("Guenter Roeck");
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MODULE_DESCRIPTION("Generic PMBus driver");
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MODULE_LICENSE("GPL");
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module_init(pmbus_init);
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module_exit(pmbus_exit);
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@ -0,0 +1,313 @@
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/*
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* pmbus.h - Common defines and structures for PMBus devices
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*
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* Copyright (c) 2010, 2011 Ericsson AB.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef PMBUS_H
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#define PMBUS_H
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/*
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* Registers
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*/
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#define PMBUS_PAGE 0x00
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#define PMBUS_OPERATION 0x01
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#define PMBUS_ON_OFF_CONFIG 0x02
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#define PMBUS_CLEAR_FAULTS 0x03
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#define PMBUS_PHASE 0x04
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#define PMBUS_CAPABILITY 0x19
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#define PMBUS_QUERY 0x1A
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#define PMBUS_VOUT_MODE 0x20
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#define PMBUS_VOUT_COMMAND 0x21
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#define PMBUS_VOUT_TRIM 0x22
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#define PMBUS_VOUT_CAL_OFFSET 0x23
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#define PMBUS_VOUT_MAX 0x24
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#define PMBUS_VOUT_MARGIN_HIGH 0x25
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#define PMBUS_VOUT_MARGIN_LOW 0x26
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#define PMBUS_VOUT_TRANSITION_RATE 0x27
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#define PMBUS_VOUT_DROOP 0x28
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#define PMBUS_VOUT_SCALE_LOOP 0x29
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#define PMBUS_VOUT_SCALE_MONITOR 0x2A
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#define PMBUS_COEFFICIENTS 0x30
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#define PMBUS_POUT_MAX 0x31
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#define PMBUS_FAN_CONFIG_12 0x3A
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#define PMBUS_FAN_COMMAND_1 0x3B
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#define PMBUS_FAN_COMMAND_2 0x3C
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#define PMBUS_FAN_CONFIG_34 0x3D
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#define PMBUS_FAN_COMMAND_3 0x3E
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#define PMBUS_FAN_COMMAND_4 0x3F
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#define PMBUS_VOUT_OV_FAULT_LIMIT 0x40
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#define PMBUS_VOUT_OV_FAULT_RESPONSE 0x41
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#define PMBUS_VOUT_OV_WARN_LIMIT 0x42
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#define PMBUS_VOUT_UV_WARN_LIMIT 0x43
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#define PMBUS_VOUT_UV_FAULT_LIMIT 0x44
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#define PMBUS_VOUT_UV_FAULT_RESPONSE 0x45
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#define PMBUS_IOUT_OC_FAULT_LIMIT 0x46
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#define PMBUS_IOUT_OC_FAULT_RESPONSE 0x47
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#define PMBUS_IOUT_OC_LV_FAULT_LIMIT 0x48
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#define PMBUS_IOUT_OC_LV_FAULT_RESPONSE 0x49
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#define PMBUS_IOUT_OC_WARN_LIMIT 0x4A
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#define PMBUS_IOUT_UC_FAULT_LIMIT 0x4B
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#define PMBUS_IOUT_UC_FAULT_RESPONSE 0x4C
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#define PMBUS_OT_FAULT_LIMIT 0x4F
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#define PMBUS_OT_FAULT_RESPONSE 0x50
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#define PMBUS_OT_WARN_LIMIT 0x51
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#define PMBUS_UT_WARN_LIMIT 0x52
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#define PMBUS_UT_FAULT_LIMIT 0x53
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#define PMBUS_UT_FAULT_RESPONSE 0x54
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#define PMBUS_VIN_OV_FAULT_LIMIT 0x55
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#define PMBUS_VIN_OV_FAULT_RESPONSE 0x56
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#define PMBUS_VIN_OV_WARN_LIMIT 0x57
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#define PMBUS_VIN_UV_WARN_LIMIT 0x58
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#define PMBUS_VIN_UV_FAULT_LIMIT 0x59
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#define PMBUS_IIN_OC_FAULT_LIMIT 0x5B
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#define PMBUS_IIN_OC_WARN_LIMIT 0x5D
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#define PMBUS_POUT_OP_FAULT_LIMIT 0x68
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#define PMBUS_POUT_OP_WARN_LIMIT 0x6A
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#define PMBUS_PIN_OP_WARN_LIMIT 0x6B
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#define PMBUS_STATUS_BYTE 0x78
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#define PMBUS_STATUS_WORD 0x79
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#define PMBUS_STATUS_VOUT 0x7A
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#define PMBUS_STATUS_IOUT 0x7B
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#define PMBUS_STATUS_INPUT 0x7C
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#define PMBUS_STATUS_TEMPERATURE 0x7D
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#define PMBUS_STATUS_CML 0x7E
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#define PMBUS_STATUS_OTHER 0x7F
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#define PMBUS_STATUS_MFR_SPECIFIC 0x80
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#define PMBUS_STATUS_FAN_12 0x81
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#define PMBUS_STATUS_FAN_34 0x82
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#define PMBUS_READ_VIN 0x88
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#define PMBUS_READ_IIN 0x89
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#define PMBUS_READ_VCAP 0x8A
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#define PMBUS_READ_VOUT 0x8B
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#define PMBUS_READ_IOUT 0x8C
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#define PMBUS_READ_TEMPERATURE_1 0x8D
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#define PMBUS_READ_TEMPERATURE_2 0x8E
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#define PMBUS_READ_TEMPERATURE_3 0x8F
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#define PMBUS_READ_FAN_SPEED_1 0x90
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#define PMBUS_READ_FAN_SPEED_2 0x91
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#define PMBUS_READ_FAN_SPEED_3 0x92
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#define PMBUS_READ_FAN_SPEED_4 0x93
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#define PMBUS_READ_DUTY_CYCLE 0x94
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#define PMBUS_READ_FREQUENCY 0x95
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#define PMBUS_READ_POUT 0x96
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#define PMBUS_READ_PIN 0x97
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#define PMBUS_REVISION 0x98
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#define PMBUS_MFR_ID 0x99
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#define PMBUS_MFR_MODEL 0x9A
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#define PMBUS_MFR_REVISION 0x9B
|
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#define PMBUS_MFR_LOCATION 0x9C
|
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#define PMBUS_MFR_DATE 0x9D
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#define PMBUS_MFR_SERIAL 0x9E
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/*
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* CAPABILITY
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*/
|
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#define PB_CAPABILITY_SMBALERT (1<<4)
|
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#define PB_CAPABILITY_ERROR_CHECK (1<<7)
|
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|
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/*
|
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* VOUT_MODE
|
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*/
|
||||
#define PB_VOUT_MODE_MODE_MASK 0xe0
|
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#define PB_VOUT_MODE_PARAM_MASK 0x1f
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|
||||
#define PB_VOUT_MODE_LINEAR 0x00
|
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#define PB_VOUT_MODE_VID 0x20
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#define PB_VOUT_MODE_DIRECT 0x40
|
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|
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/*
|
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* Fan configuration
|
||||
*/
|
||||
#define PB_FAN_2_PULSE_MASK ((1 << 0) | (1 << 1))
|
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#define PB_FAN_2_RPM (1 << 2)
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#define PB_FAN_2_INSTALLED (1 << 3)
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#define PB_FAN_1_PULSE_MASK ((1 << 4) | (1 << 5))
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#define PB_FAN_1_RPM (1 << 6)
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#define PB_FAN_1_INSTALLED (1 << 7)
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|
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/*
|
||||
* STATUS_BYTE, STATUS_WORD (lower)
|
||||
*/
|
||||
#define PB_STATUS_NONE_ABOVE (1<<0)
|
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#define PB_STATUS_CML (1<<1)
|
||||
#define PB_STATUS_TEMPERATURE (1<<2)
|
||||
#define PB_STATUS_VIN_UV (1<<3)
|
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#define PB_STATUS_IOUT_OC (1<<4)
|
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#define PB_STATUS_VOUT_OV (1<<5)
|
||||
#define PB_STATUS_OFF (1<<6)
|
||||
#define PB_STATUS_BUSY (1<<7)
|
||||
|
||||
/*
|
||||
* STATUS_WORD (upper)
|
||||
*/
|
||||
#define PB_STATUS_UNKNOWN (1<<8)
|
||||
#define PB_STATUS_OTHER (1<<9)
|
||||
#define PB_STATUS_FANS (1<<10)
|
||||
#define PB_STATUS_POWER_GOOD_N (1<<11)
|
||||
#define PB_STATUS_WORD_MFR (1<<12)
|
||||
#define PB_STATUS_INPUT (1<<13)
|
||||
#define PB_STATUS_IOUT_POUT (1<<14)
|
||||
#define PB_STATUS_VOUT (1<<15)
|
||||
|
||||
/*
|
||||
* STATUS_IOUT
|
||||
*/
|
||||
#define PB_POUT_OP_WARNING (1<<0)
|
||||
#define PB_POUT_OP_FAULT (1<<1)
|
||||
#define PB_POWER_LIMITING (1<<2)
|
||||
#define PB_CURRENT_SHARE_FAULT (1<<3)
|
||||
#define PB_IOUT_UC_FAULT (1<<4)
|
||||
#define PB_IOUT_OC_WARNING (1<<5)
|
||||
#define PB_IOUT_OC_LV_FAULT (1<<6)
|
||||
#define PB_IOUT_OC_FAULT (1<<7)
|
||||
|
||||
/*
|
||||
* STATUS_VOUT, STATUS_INPUT
|
||||
*/
|
||||
#define PB_VOLTAGE_UV_FAULT (1<<4)
|
||||
#define PB_VOLTAGE_UV_WARNING (1<<5)
|
||||
#define PB_VOLTAGE_OV_WARNING (1<<6)
|
||||
#define PB_VOLTAGE_OV_FAULT (1<<7)
|
||||
|
||||
/*
|
||||
* STATUS_INPUT
|
||||
*/
|
||||
#define PB_PIN_OP_WARNING (1<<0)
|
||||
#define PB_IIN_OC_WARNING (1<<1)
|
||||
#define PB_IIN_OC_FAULT (1<<2)
|
||||
|
||||
/*
|
||||
* STATUS_TEMPERATURE
|
||||
*/
|
||||
#define PB_TEMP_UT_FAULT (1<<4)
|
||||
#define PB_TEMP_UT_WARNING (1<<5)
|
||||
#define PB_TEMP_OT_WARNING (1<<6)
|
||||
#define PB_TEMP_OT_FAULT (1<<7)
|
||||
|
||||
/*
|
||||
* STATUS_FAN
|
||||
*/
|
||||
#define PB_FAN_AIRFLOW_WARNING (1<<0)
|
||||
#define PB_FAN_AIRFLOW_FAULT (1<<1)
|
||||
#define PB_FAN_FAN2_SPEED_OVERRIDE (1<<2)
|
||||
#define PB_FAN_FAN1_SPEED_OVERRIDE (1<<3)
|
||||
#define PB_FAN_FAN2_WARNING (1<<4)
|
||||
#define PB_FAN_FAN1_WARNING (1<<5)
|
||||
#define PB_FAN_FAN2_FAULT (1<<6)
|
||||
#define PB_FAN_FAN1_FAULT (1<<7)
|
||||
|
||||
/*
|
||||
* CML_FAULT_STATUS
|
||||
*/
|
||||
#define PB_CML_FAULT_OTHER_MEM_LOGIC (1<<0)
|
||||
#define PB_CML_FAULT_OTHER_COMM (1<<1)
|
||||
#define PB_CML_FAULT_PROCESSOR (1<<3)
|
||||
#define PB_CML_FAULT_MEMORY (1<<4)
|
||||
#define PB_CML_FAULT_PACKET_ERROR (1<<5)
|
||||
#define PB_CML_FAULT_INVALID_DATA (1<<6)
|
||||
#define PB_CML_FAULT_INVALID_COMMAND (1<<7)
|
||||
|
||||
enum pmbus_sensor_classes {
|
||||
PSC_VOLTAGE_IN = 0,
|
||||
PSC_VOLTAGE_OUT,
|
||||
PSC_CURRENT_IN,
|
||||
PSC_CURRENT_OUT,
|
||||
PSC_POWER,
|
||||
PSC_TEMPERATURE,
|
||||
PSC_FAN,
|
||||
PSC_NUM_CLASSES /* Number of power sensor classes */
|
||||
};
|
||||
|
||||
#define PMBUS_PAGES 32 /* Per PMBus specification */
|
||||
|
||||
/* Functionality bit mask */
|
||||
#define PMBUS_HAVE_VIN (1 << 0)
|
||||
#define PMBUS_HAVE_VCAP (1 << 1)
|
||||
#define PMBUS_HAVE_VOUT (1 << 2)
|
||||
#define PMBUS_HAVE_IIN (1 << 3)
|
||||
#define PMBUS_HAVE_IOUT (1 << 4)
|
||||
#define PMBUS_HAVE_PIN (1 << 5)
|
||||
#define PMBUS_HAVE_POUT (1 << 6)
|
||||
#define PMBUS_HAVE_FAN12 (1 << 7)
|
||||
#define PMBUS_HAVE_FAN34 (1 << 8)
|
||||
#define PMBUS_HAVE_TEMP (1 << 9)
|
||||
#define PMBUS_HAVE_TEMP2 (1 << 10)
|
||||
#define PMBUS_HAVE_TEMP3 (1 << 11)
|
||||
#define PMBUS_HAVE_STATUS_VOUT (1 << 12)
|
||||
#define PMBUS_HAVE_STATUS_IOUT (1 << 13)
|
||||
#define PMBUS_HAVE_STATUS_INPUT (1 << 14)
|
||||
#define PMBUS_HAVE_STATUS_TEMP (1 << 15)
|
||||
#define PMBUS_HAVE_STATUS_FAN12 (1 << 16)
|
||||
#define PMBUS_HAVE_STATUS_FAN34 (1 << 17)
|
||||
|
||||
struct pmbus_driver_info {
|
||||
int pages; /* Total number of pages */
|
||||
bool direct[PSC_NUM_CLASSES];
|
||||
/* true if device uses direct data format
|
||||
for the given sensor class */
|
||||
/*
|
||||
* Support one set of coefficients for each sensor type
|
||||
* Used for chips providing data in direct mode.
|
||||
*/
|
||||
int m[PSC_NUM_CLASSES]; /* mantissa for direct data format */
|
||||
int b[PSC_NUM_CLASSES]; /* offset */
|
||||
int R[PSC_NUM_CLASSES]; /* exponent */
|
||||
|
||||
u32 func[PMBUS_PAGES]; /* Functionality, per page */
|
||||
/*
|
||||
* The get_status function maps manufacturing specific status values
|
||||
* into PMBus standard status values.
|
||||
* This function is optional and only necessary if chip specific status
|
||||
* register values have to be mapped into standard PMBus status register
|
||||
* values.
|
||||
*/
|
||||
int (*get_status)(struct i2c_client *client, int page, int reg);
|
||||
/*
|
||||
* The identify function determines supported PMBus functionality.
|
||||
* This function is only necessary if a chip driver supports multiple
|
||||
* chips, and the chip functionality is not pre-determined.
|
||||
*/
|
||||
int (*identify)(struct i2c_client *client,
|
||||
struct pmbus_driver_info *info);
|
||||
};
|
||||
|
||||
/* Function declarations */
|
||||
|
||||
int pmbus_set_page(struct i2c_client *client, u8 page);
|
||||
int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg);
|
||||
void pmbus_clear_faults(struct i2c_client *client);
|
||||
bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg);
|
||||
bool pmbus_check_word_register(struct i2c_client *client, int page, int reg);
|
||||
int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
|
||||
struct pmbus_driver_info *info);
|
||||
int pmbus_do_remove(struct i2c_client *client);
|
||||
const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client
|
||||
*client);
|
||||
|
||||
#endif /* PMBUS_H */
|
||||
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Загрузить разницу
|
|
@ -0,0 +1,45 @@
|
|||
/*
|
||||
* Hardware monitoring driver for PMBus devices
|
||||
*
|
||||
* Copyright (c) 2010, 2011 Ericsson AB.
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef _PMBUS_H_
|
||||
#define _PMBUS_H_
|
||||
|
||||
/* flags */
|
||||
|
||||
/*
|
||||
* PMBUS_SKIP_STATUS_CHECK
|
||||
*
|
||||
* During register detection, skip checking the status register for
|
||||
* communication or command errors.
|
||||
*
|
||||
* Some PMBus chips respond with valid data when trying to read an unsupported
|
||||
* register. For such chips, checking the status register is mandatory when
|
||||
* trying to determine if a chip register exists or not.
|
||||
* Other PMBus chips don't support the STATUS_CML register, or report
|
||||
* communication errors for no explicable reason. For such chips, checking
|
||||
* the status register must be disabled.
|
||||
*/
|
||||
#define PMBUS_SKIP_STATUS_CHECK (1 << 0)
|
||||
|
||||
struct pmbus_platform_data {
|
||||
u32 flags; /* Device specific flags */
|
||||
};
|
||||
|
||||
#endif /* _PMBUS_H_ */
|
||||
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