mirrors/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2025-11-04 10:40:15 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

platform/x86: Introduce support for Mellanox hotplug driver

Browse source 
Enable system support for the Mellanox Technologies hotplug platform
driver, which provides support for the next Mellanox basic systems:
"msx6710", "msx6720", "msb7700", "msn2700", "msx1410", "msn2410",
"msb7800", "msn2740", "msn2100" and also various number of derivative
systems from the above basic types.
This driver handles hot-plug events for the power suppliers, power
cables and fans for the above systems.

The Kconfig currently controlling compilation of this code is:
driver/platform/x86:config MLX_CPLD_PLATFORM
                       tristate "Mellanox platform hotplug driver support"

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This commit is contained in:
Vadim Pasternak 2016-10-20 16:28:01 +00:00 committed by Darren Hart
parent c3f8f7fa8b
commit 304887041d
5 changed files with 633 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

7
MAINTAINERS
View file

@ -7881,6 +7881,13 @@ L: platform-driver-x86@vger.kernel.org
S: Supported S: Supported
F: arch/x86/platform/mellanox/mlx-platform.c F: arch/x86/platform/mellanox/mlx-platform.c
MELLANOX MLX CPLD HOTPLUG DRIVER
M: Vadim Pasternak <vadimp@mellanox.com>
L: platform-driver-x86@vger.kernel.org
S: Supported
F: drivers/platform/x86/mlxcpld-hotplug.c
F: include/linux/platform_data/mlxcpld-hotplug.h
SOFT-ROCE DRIVER (rxe) SOFT-ROCE DRIVER (rxe)
M: Moni Shoua <monis@mellanox.com> M: Moni Shoua <monis@mellanox.com>
L: linux-rdma@vger.kernel.org L: linux-rdma@vger.kernel.org

11
drivers/platform/x86/Kconfig
View file

@ -1027,4 +1027,15 @@ config INTEL_TELEMETRY
used to get various SoC events and parameters used to get various SoC events and parameters
directly via debugfs files. Various tools may use directly via debugfs files. Various tools may use
this interface for SoC state monitoring. this interface for SoC state monitoring.
config MLX_CPLD_PLATFORM
tristate "Mellanox platform hotplug driver support"
default n
depends on MLX_PLATFORM
select HWMON
select I2C
---help---
This driver handles hot-plug events for the power suppliers, power
cables and fans on the wide range Mellanox IB and Ethernet systems.
endif # X86_PLATFORM_DEVICES endif # X86_PLATFORM_DEVICES

1
drivers/platform/x86/Makefile
View file

@ -71,3 +71,4 @@ obj-$(CONFIG_INTEL_TELEMETRY) += intel_telemetry_core.o \
intel_telemetry_pltdrv.o \ intel_telemetry_pltdrv.o \
intel_telemetry_debugfs.o intel_telemetry_debugfs.o
obj-$(CONFIG_INTEL_PMC_CORE) += intel_pmc_core.o obj-$(CONFIG_INTEL_PMC_CORE) += intel_pmc_core.o
obj-$(CONFIG_MLX_CPLD_PLATFORM) += mlxcpld-hotplug.o

515
drivers/platform/x86/mlxcpld-hotplug.c Normal file
View file

@ -0,0 +1,515 @@
/*
* drivers/platform/x86/mlxcpld-hotplug.c
* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
* Copyright (c) 2016 Vadim Pasternak <vadimp@mellanox.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_data/mlxcpld-hotplug.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
/* Offset of event and mask registers from status register */
#define MLXCPLD_HOTPLUG_EVENT_OFF 1
#define MLXCPLD_HOTPLUG_MASK_OFF 2
#define MLXCPLD_HOTPLUG_AGGR_MASK_OFF 1
#define MLXCPLD_HOTPLUG_ATTRS_NUM 8
/**
* enum mlxcpld_hotplug_attr_type - sysfs attributes for hotplug events:
* @MLXCPLD_HOTPLUG_ATTR_TYPE_PSU: power supply unit attribute;
* @MLXCPLD_HOTPLUG_ATTR_TYPE_PWR: power cable attribute;
* @MLXCPLD_HOTPLUG_ATTR_TYPE_FAN: FAN drawer attribute;
*/
enum mlxcpld_hotplug_attr_type {
MLXCPLD_HOTPLUG_ATTR_TYPE_PSU,
MLXCPLD_HOTPLUG_ATTR_TYPE_PWR,
MLXCPLD_HOTPLUG_ATTR_TYPE_FAN,
};
/**
* struct mlxcpld_hotplug_priv_data - platform private data:
* @irq: platform interrupt number;
* @pdev: platform device;
* @plat: platform data;
* @hwmon: hwmon device;
* @mlxcpld_hotplug_attr: sysfs attributes array;
* @mlxcpld_hotplug_dev_attr: sysfs sensor device attribute array;
* @group: sysfs attribute group;
* @groups: list of sysfs attribute group for hwmon registration;
* @dwork: delayed work template;
* @lock: spin lock;
* @aggr_cache: last value of aggregation register status;
* @psu_cache: last value of PSU register status;
* @pwr_cache: last value of power register status;
* @fan_cache: last value of FAN register status;
*/
struct mlxcpld_hotplug_priv_data {
int irq;
struct platform_device *pdev;
struct mlxcpld_hotplug_platform_data *plat;
struct device *hwmon;
struct attribute *mlxcpld_hotplug_attr[MLXCPLD_HOTPLUG_ATTRS_NUM + 1];
struct sensor_device_attribute_2
mlxcpld_hotplug_dev_attr[MLXCPLD_HOTPLUG_ATTRS_NUM];
struct attribute_group group;
const struct attribute_group *groups[2];
struct delayed_work dwork;
spinlock_t lock;
u8 aggr_cache;
u8 psu_cache;
u8 pwr_cache;
u8 fan_cache;
};
static ssize_t mlxcpld_hotplug_attr_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct platform_device *pdev = to_platform_device(dev);
struct mlxcpld_hotplug_priv_data *priv = platform_get_drvdata(pdev);
int index = to_sensor_dev_attr_2(attr)->index;
int nr = to_sensor_dev_attr_2(attr)->nr;
u8 reg_val = 0;
switch (nr) {
case MLXCPLD_HOTPLUG_ATTR_TYPE_PSU:
/* Bit = 0 : PSU is present. */
reg_val = !!!(inb(priv->plat->psu_reg_offset) & BIT(index));
break;
case MLXCPLD_HOTPLUG_ATTR_TYPE_PWR:
/* Bit = 1 : power cable is attached. */
reg_val = !!(inb(priv->plat->pwr_reg_offset) & BIT(index %
priv->plat->pwr_count));
break;
case MLXCPLD_HOTPLUG_ATTR_TYPE_FAN:
/* Bit = 0 : FAN is present. */
reg_val = !!!(inb(priv->plat->fan_reg_offset) & BIT(index %
priv->plat->fan_count));
break;
}
return sprintf(buf, "%u\n", reg_val);
}
#define PRIV_ATTR(i) priv->mlxcpld_hotplug_attr[i]
#define PRIV_DEV_ATTR(i) priv->mlxcpld_hotplug_dev_attr[i]
static int mlxcpld_hotplug_attr_init(struct mlxcpld_hotplug_priv_data *priv)
{
int num_attrs = priv->plat->psu_count + priv->plat->pwr_count +
priv->plat->fan_count;
int i;
priv->group.attrs = devm_kzalloc(&priv->pdev->dev, num_attrs *
sizeof(struct attribute *),
GFP_KERNEL);
if (!priv->group.attrs)
return -ENOMEM;
for (i = 0; i < num_attrs; i++) {
PRIV_ATTR(i) = &PRIV_DEV_ATTR(i).dev_attr.attr;
if (i < priv->plat->psu_count) {
PRIV_ATTR(i)->name = devm_kasprintf(&priv->pdev->dev,
GFP_KERNEL, "psu%u", i + 1);
PRIV_DEV_ATTR(i).nr = MLXCPLD_HOTPLUG_ATTR_TYPE_PSU;
} else if (i < priv->plat->psu_count + priv->plat->pwr_count) {
PRIV_ATTR(i)->name = devm_kasprintf(&priv->pdev->dev,
GFP_KERNEL, "pwr%u", i %
priv->plat->pwr_count + 1);
PRIV_DEV_ATTR(i).nr = MLXCPLD_HOTPLUG_ATTR_TYPE_PWR;
} else {
PRIV_ATTR(i)->name = devm_kasprintf(&priv->pdev->dev,
GFP_KERNEL, "fan%u", i %
priv->plat->fan_count + 1);
PRIV_DEV_ATTR(i).nr = MLXCPLD_HOTPLUG_ATTR_TYPE_FAN;
}
if (!PRIV_ATTR(i)->name) {
dev_err(&priv->pdev->dev, "Memory allocation failed for sysfs attribute %d.\n",
i + 1);
return -ENOMEM;
}
PRIV_DEV_ATTR(i).dev_attr.attr.name = PRIV_ATTR(i)->name;
PRIV_DEV_ATTR(i).dev_attr.attr.mode = S_IRUGO;
PRIV_DEV_ATTR(i).dev_attr.show = mlxcpld_hotplug_attr_show;
PRIV_DEV_ATTR(i).index = i;
sysfs_attr_init(&PRIV_DEV_ATTR(i).dev_attr.attr);
}
priv->group.attrs = priv->mlxcpld_hotplug_attr;
priv->groups[0] = &priv->group;
priv->groups[1] = NULL;
return 0;
}
static int mlxcpld_hotplug_device_create(struct device *dev,
struct mlxcpld_hotplug_device *item)
{
item->adapter = i2c_get_adapter(item->bus);
if (!item->adapter) {
dev_err(dev, "Failed to get adapter for bus %d\n",
item->bus);
return -EFAULT;
}
item->client = i2c_new_device(item->adapter, &item->brdinfo);
if (!item->client) {
dev_err(dev, "Failed to create client %s at bus %d at addr 0x%02x\n",
item->brdinfo.type, item->bus, item->brdinfo.addr);
i2c_put_adapter(item->adapter);
item->adapter = NULL;
return -EFAULT;
}
return 0;
}
static void mlxcpld_hotplug_device_destroy(struct mlxcpld_hotplug_device *item)
{
if (item->client) {
i2c_unregister_device(item->client);
item->client = NULL;
}
if (item->adapter) {
i2c_put_adapter(item->adapter);
item->adapter = NULL;
}
}
static inline void
mlxcpld_hotplug_work_helper(struct device *dev,
struct mlxcpld_hotplug_device *item, u8 is_inverse,
u16 offset, u8 mask, u8 *cache)
{
u8 val, asserted;
int bit;
/* Mask event. */
outb(0, offset + MLXCPLD_HOTPLUG_MASK_OFF);
/* Read status. */
val = inb(offset) & mask;
asserted = *cache ^ val;
*cache = val;
/*
* Validate if item related to received signal type is valid.
* It should never happen, excepted the situation when some
* piece of hardware is broken. In such situation just produce
* error message and return. Caller must continue to handle the
* signals from other devices if any.
*/
if (unlikely(!item)) {
dev_err(dev, "False signal is received: register at offset 0x%02x, mask 0x%02x.\n",
offset, mask);
return;
}
for_each_set_bit(bit, (unsigned long *)&asserted, 8) {
if (val & BIT(bit)) {
if (is_inverse)
mlxcpld_hotplug_device_destroy(item + bit);
else
mlxcpld_hotplug_device_create(dev, item + bit);
} else {
if (is_inverse)
mlxcpld_hotplug_device_create(dev, item + bit);
else
mlxcpld_hotplug_device_destroy(item + bit);
}
}
/* Acknowledge event. */
outb(0, offset + MLXCPLD_HOTPLUG_EVENT_OFF);
/* Unmask event. */
outb(mask, offset + MLXCPLD_HOTPLUG_MASK_OFF);
}
/*
* mlxcpld_hotplug_work_handler - performs traversing of CPLD interrupt
* registers according to the below hierarchy schema:
*
* Aggregation registers (status/mask)
* PSU registers: *---*
* *-----------------* | |
* |status/event/mask|----->| * |
* *-----------------* | |
* Power registers: | |
* *-----------------* | |
* |status/event/mask|----->| * |---> CPU
* *-----------------* | |
* FAN registers:
* *-----------------* | |
* |status/event/mask|----->| * |
* *-----------------* | |
* *---*
* In case some system changed are detected: FAN in/out, PSU in/out, power
* cable attached/detached, relevant device is created or destroyed.
*/
static void mlxcpld_hotplug_work_handler(struct work_struct *work)
{
struct mlxcpld_hotplug_priv_data *priv = container_of(work,
struct mlxcpld_hotplug_priv_data, dwork.work);
u8 val, aggr_asserted;
unsigned long flags;
/* Mask aggregation event. */
outb(0, priv->plat->top_aggr_offset + MLXCPLD_HOTPLUG_AGGR_MASK_OFF);
/* Read aggregation status. */
val = inb(priv->plat->top_aggr_offset) & priv->plat->top_aggr_mask;
aggr_asserted = priv->aggr_cache ^ val;
priv->aggr_cache = val;
/* Handle PSU configuration changes. */
if (aggr_asserted & priv->plat->top_aggr_psu_mask)
mlxcpld_hotplug_work_helper(&priv->pdev->dev, priv->plat->psu,
1, priv->plat->psu_reg_offset,
priv->plat->psu_mask,
&priv->psu_cache);
/* Handle power cable configuration changes. */
if (aggr_asserted & priv->plat->top_aggr_pwr_mask)
mlxcpld_hotplug_work_helper(&priv->pdev->dev, priv->plat->pwr,
0, priv->plat->pwr_reg_offset,
priv->plat->pwr_mask,
&priv->pwr_cache);
/* Handle FAN configuration changes. */
if (aggr_asserted & priv->plat->top_aggr_fan_mask)
mlxcpld_hotplug_work_helper(&priv->pdev->dev, priv->plat->fan,
1, priv->plat->fan_reg_offset,
priv->plat->fan_mask,
&priv->fan_cache);
if (aggr_asserted) {
spin_lock_irqsave(&priv->lock, flags);
/*
* It is possible, that some signals have been inserted, while
* interrupt has been masked by mlxcpld_hotplug_work_handler.
* In this case such signals will be missed. In order to handle
* these signals delayed work is canceled and work task
* re-scheduled for immediate execution. It allows to handle
* missed signals, if any. In other case work handler just
* validates that no new signals have been received during
* masking.
*/
cancel_delayed_work(&priv->dwork);
schedule_delayed_work(&priv->dwork, 0);
spin_unlock_irqrestore(&priv->lock, flags);
return;
}
/* Unmask aggregation event (no need acknowledge). */
outb(priv->plat->top_aggr_mask, priv->plat->top_aggr_offset +
MLXCPLD_HOTPLUG_AGGR_MASK_OFF);
}
static void mlxcpld_hotplug_set_irq(struct mlxcpld_hotplug_priv_data *priv)
{
/* Clear psu presense event. */
outb(0, priv->plat->psu_reg_offset + MLXCPLD_HOTPLUG_EVENT_OFF);
/* Set psu initial status as mask and unmask psu event. */
priv->psu_cache = priv->plat->psu_mask;
outb(priv->plat->psu_mask, priv->plat->psu_reg_offset +
MLXCPLD_HOTPLUG_MASK_OFF);
/* Clear power cable event. */
outb(0, priv->plat->pwr_reg_offset + MLXCPLD_HOTPLUG_EVENT_OFF);
/* Keep power initial status as zero and unmask power event. */
outb(priv->plat->pwr_mask, priv->plat->pwr_reg_offset +
MLXCPLD_HOTPLUG_MASK_OFF);
/* Clear fan presense event. */
outb(0, priv->plat->fan_reg_offset + MLXCPLD_HOTPLUG_EVENT_OFF);
/* Set fan initial status as mask and unmask fan event. */
priv->fan_cache = priv->plat->fan_mask;
outb(priv->plat->fan_mask, priv->plat->fan_reg_offset +
MLXCPLD_HOTPLUG_MASK_OFF);
/* Keep aggregation initial status as zero and unmask events. */
outb(priv->plat->top_aggr_mask, priv->plat->top_aggr_offset +
MLXCPLD_HOTPLUG_AGGR_MASK_OFF);
/* Invoke work handler for initializing hot plug devices setting. */
mlxcpld_hotplug_work_handler(&priv->dwork.work);
enable_irq(priv->irq);
}
static void mlxcpld_hotplug_unset_irq(struct mlxcpld_hotplug_priv_data *priv)
{
int i;
disable_irq(priv->irq);
cancel_delayed_work_sync(&priv->dwork);
/* Mask aggregation event. */
outb(0, priv->plat->top_aggr_offset + MLXCPLD_HOTPLUG_AGGR_MASK_OFF);
/* Mask psu presense event. */
outb(0, priv->plat->psu_reg_offset + MLXCPLD_HOTPLUG_MASK_OFF);
/* Clear psu presense event. */
outb(0, priv->plat->psu_reg_offset + MLXCPLD_HOTPLUG_EVENT_OFF);
/* Mask power cable event. */
outb(0, priv->plat->pwr_reg_offset + MLXCPLD_HOTPLUG_MASK_OFF);
/* Clear power cable event. */
outb(0, priv->plat->pwr_reg_offset + MLXCPLD_HOTPLUG_EVENT_OFF);
/* Mask fan presense event. */
outb(0, priv->plat->fan_reg_offset + MLXCPLD_HOTPLUG_MASK_OFF);
/* Clear fan presense event. */
outb(0, priv->plat->fan_reg_offset + MLXCPLD_HOTPLUG_EVENT_OFF);
/* Remove all the attached devices. */
for (i = 0; i < priv->plat->psu_count; i++)
mlxcpld_hotplug_device_destroy(priv->plat->psu + i);
for (i = 0; i < priv->plat->pwr_count; i++)
mlxcpld_hotplug_device_destroy(priv->plat->pwr + i);
for (i = 0; i < priv->plat->fan_count; i++)
mlxcpld_hotplug_device_destroy(priv->plat->fan + i);
}
static irqreturn_t mlxcpld_hotplug_irq_handler(int irq, void *dev)
{
struct mlxcpld_hotplug_priv_data *priv =
(struct mlxcpld_hotplug_priv_data *)dev;
/* Schedule work task for immediate execution.*/
schedule_delayed_work(&priv->dwork, 0);
return IRQ_HANDLED;
}
static int mlxcpld_hotplug_probe(struct platform_device *pdev)
{
struct mlxcpld_hotplug_platform_data *pdata;
struct mlxcpld_hotplug_priv_data *priv;
int err;
pdata = dev_get_platdata(&pdev->dev);
if (!pdata) {
dev_err(&pdev->dev, "Failed to get platform data.\n");
return -EINVAL;
}
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->pdev = pdev;
priv->plat = pdata;
priv->irq = platform_get_irq(pdev, 0);
if (priv->irq < 0) {
dev_err(&pdev->dev, "Failed to get platform irq: %d\n",
priv->irq);
return priv->irq;
}
err = devm_request_irq(&pdev->dev, priv->irq,
mlxcpld_hotplug_irq_handler, 0, pdev->name,
priv);
if (err) {
dev_err(&pdev->dev, "Failed to request irq: %d\n", err);
return err;
}
disable_irq(priv->irq);
INIT_DELAYED_WORK(&priv->dwork, mlxcpld_hotplug_work_handler);
spin_lock_init(&priv->lock);
err = mlxcpld_hotplug_attr_init(priv);
if (err) {
dev_err(&pdev->dev, "Failed to allocate attributes: %d\n", err);
return err;
}
priv->hwmon = devm_hwmon_device_register_with_groups(&pdev->dev,
"mlxcpld_hotplug", priv, priv->groups);
if (IS_ERR(priv->hwmon)) {
dev_err(&pdev->dev, "Failed to register hwmon device %ld\n",
PTR_ERR(priv->hwmon));
return PTR_ERR(priv->hwmon);
}
platform_set_drvdata(pdev, priv);
/* Perform initial interrupts setup. */
mlxcpld_hotplug_set_irq(priv);
return 0;
}
static int mlxcpld_hotplug_remove(struct platform_device *pdev)
{
struct mlxcpld_hotplug_priv_data *priv = platform_get_drvdata(pdev);
/* Clean interrupts setup. */
mlxcpld_hotplug_unset_irq(priv);
return 0;
}
static struct platform_driver mlxcpld_hotplug_driver = {
.driver = {
.name = "mlxcpld-hotplug",
},
.probe = mlxcpld_hotplug_probe,
.remove = mlxcpld_hotplug_remove,
};
module_platform_driver(mlxcpld_hotplug_driver);
MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
MODULE_DESCRIPTION("Mellanox CPLD hotplug platform driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("platform:mlxcpld-hotplug");

99
include/linux/platform_data/mlxcpld-hotplug.h Normal file
View file

@ -0,0 +1,99 @@
/*
* include/linux/platform_data/mlxcpld-hotplug.h
* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
* Copyright (c) 2016 Vadim Pasternak <vadimp@mellanox.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __LINUX_PLATFORM_DATA_MLXCPLD_HOTPLUG_H
#define __LINUX_PLATFORM_DATA_MLXCPLD_HOTPLUG_H
/**
* struct mlxcpld_hotplug_device - I2C device data:
* @adapter: I2C device adapter;
* @client: I2C device client;
* @brdinfo: device board information;
* @bus: I2C bus, where device is attached;
*
* Structure represents I2C hotplug device static data (board topology) and
* dynamic data (related kernel objects handles).
*/
struct mlxcpld_hotplug_device {
struct i2c_adapter *adapter;
struct i2c_client *client;
struct i2c_board_info brdinfo;
u16 bus;
};
/**
* struct mlxcpld_hotplug_platform_data - device platform data:
* @top_aggr_offset: offset of top aggregation interrupt register;
* @top_aggr_mask: top aggregation interrupt common mask;
* @top_aggr_psu_mask: top aggregation interrupt PSU mask;
* @psu_reg_offset: offset of PSU interrupt register;
* @psu_mask: PSU interrupt mask;
* @psu_count: number of equipped replaceable PSUs;
* @psu: pointer to PSU devices data array;
* @top_aggr_pwr_mask: top aggregation interrupt power mask;
* @pwr_reg_offset: offset of power interrupt register
* @pwr_mask: power interrupt mask;
* @pwr_count: number of power sources;
* @pwr: pointer to power devices data array;
* @top_aggr_fan_mask: top aggregation interrupt FAN mask;
* @fan_reg_offset: offset of FAN interrupt register;
* @fan_mask: FAN interrupt mask;
* @fan_count: number of equipped replaceable FANs;
* @fan: pointer to FAN devices data array;
*
* Structure represents board platform data, related to system hotplug events,
* like FAN, PSU, power cable insertion and removing. This data provides the
* number of hot-pluggable devices and hardware description for event handling.
*/
struct mlxcpld_hotplug_platform_data {
u16 top_aggr_offset;
u8 top_aggr_mask;
u8 top_aggr_psu_mask;
u16 psu_reg_offset;
u8 psu_mask;
u8 psu_count;
struct mlxcpld_hotplug_device *psu;
u8 top_aggr_pwr_mask;
u16 pwr_reg_offset;
u8 pwr_mask;
u8 pwr_count;
struct mlxcpld_hotplug_device *pwr;
u8 top_aggr_fan_mask;
u16 fan_reg_offset;
u8 fan_mask;
u8 fan_count;
struct mlxcpld_hotplug_device *fan;
};
#endif /* __LINUX_PLATFORM_DATA_MLXCPLD_HOTPLUG_H */