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

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

drivers/net/ethernet/mellanox/mlxsw/Kconfig

+11 −0
Original line number Original line Diff line number Diff line
@@ -79,3 +79,14 @@ config MLXSW_SPECTRUM_DCB 
	---help---

	---help---

	  Say Y here if you want to use Data Center Bridging (DCB) in the

	  Say Y here if you want to use Data Center Bridging (DCB) in the

	  driver.

	  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.

drivers/net/ethernet/mellanox/mlxsw/Makefile

+2 −0
Original line number Original line Diff line number Diff line
@@ -14,3 +14,5 @@ mlxsw_spectrum-objs := spectrum.o spectrum_buffers.o \ 
				   spectrum_switchdev.o spectrum_router.o \

				   spectrum_switchdev.o spectrum_router.o \

				   spectrum_kvdl.o

				   spectrum_kvdl.o

mlxsw_spectrum-$(CONFIG_MLXSW_SPECTRUM_DCB)	+= spectrum_dcb.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

0 → 100644
+97 −0
Original line number Original line Diff line number Diff line 
/*

 * 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);