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platform/x86: Introduce support for Mellanox hotplug driver

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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
Download Patch File Download Diff File Expand all files Collapse all files

7
MAINTAINERS
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@@ -7881,6 +7881,13 @@ L: platform-driver-x86@vger.kernel.org
S: Supported
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)
M: Moni Shoua <monis@mellanox.com>
L: linux-rdma@vger.kernel.org

11
drivers/platform/x86/Kconfig
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@@ -1027,4 +1027,15 @@ config INTEL_TELEMETRY
used to get various SoC events and parameters
directly via debugfs files. Various tools may use
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

1
drivers/platform/x86/Makefile
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@@ -71,3 +71,4 @@ obj-$(CONFIG_INTEL_TELEMETRY) += intel_telemetry_core.o \
intel_telemetry_pltdrv.o \
intel_telemetry_debugfs.o
obj-$(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
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99
include/linux/platform_data/mlxcpld-hotplug.h Normal file
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@@ -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 */