Commit d556e929 authored by Vadim Pasternak's avatar Vadim Pasternak Committed by David S. Miller

mlxsw: minimal: Add I2C support for Mellanox ASICs

Add I2C access support for Mellanox ASICs:
- Virtual Protocol Interconnect switches SwitchX, SwitchX2,
  providing InfiniBand, Ethernet and Fibre Channel connectivity;
- Infiniband switches SwitchIB, SwitchIB2:
- Ethernet switch Spectrum.

Example of probing activation:
echo mlxsw_minimal 0x48 > /sys/bus/i2c/devices/i2c-2/new_device
Signed-off-by: default avatarVadim Pasternak <vadimp@mellanox.com>
Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4ebd00bc
......@@ -79,3 +79,14 @@ config MLXSW_SPECTRUM_DCB
---help---
Say Y here if you want to use Data Center Bridging (DCB) in the
driver.
config MLXSW_MINIMAL
tristate "Mellanox Technologies minimal I2C support"
depends on MLXSW_CORE && MLXSW_I2C
default m
---help---
This driver supports I2C access for Mellanox Technologies Switch
ASICs.
To compile this driver as a module, choose M here: the
module will be called mlxsw_minimal.
......@@ -14,3 +14,5 @@ mlxsw_spectrum-objs := spectrum.o spectrum_buffers.o \
spectrum_switchdev.o spectrum_router.o \
spectrum_kvdl.o
mlxsw_spectrum-$(CONFIG_MLXSW_SPECTRUM_DCB) += spectrum_dcb.o
obj-$(CONFIG_MLXSW_MINIMAL) += mlxsw_minimal.o
mlxsw_minimal-objs := minimal.o
/*
* drivers/net/ethernet/mellanox/mlxsw/minimal.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/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/types.h>
#include "core.h"
#include "i2c.h"
static const char mlxsw_minimal_driver_name[] = "mlxsw_minimal";
static const struct mlxsw_config_profile mlxsw_minimal_config_profile;
static struct mlxsw_driver mlxsw_minimal_driver = {
.kind = mlxsw_minimal_driver_name,
.priv_size = 1,
.profile = &mlxsw_minimal_config_profile,
};
static const struct i2c_device_id mlxsw_minimal_i2c_id[] = {
{ "mlxsw_minimal", 0},
{ },
};
static struct i2c_driver mlxsw_minimal_i2c_driver = {
.driver.name = "mlxsw_minimal",
.class = I2C_CLASS_HWMON,
.id_table = mlxsw_minimal_i2c_id,
};
static int __init mlxsw_minimal_module_init(void)
{
int err;
err = mlxsw_core_driver_register(&mlxsw_minimal_driver);
if (err)
return err;
err = mlxsw_i2c_driver_register(&mlxsw_minimal_i2c_driver);
if (err)
goto err_i2c_driver_register;
return 0;
err_i2c_driver_register:
mlxsw_core_driver_unregister(&mlxsw_minimal_driver);
return err;
}
static void __exit mlxsw_minimal_module_exit(void)
{
mlxsw_i2c_driver_unregister(&mlxsw_minimal_i2c_driver);
mlxsw_core_driver_unregister(&mlxsw_minimal_driver);
}
module_init(mlxsw_minimal_module_init);
module_exit(mlxsw_minimal_module_exit);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
MODULE_DESCRIPTION("Mellanox minimal driver");
MODULE_DEVICE_TABLE(i2c, mlxsw_minimal_i2c_id);
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