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Commit afc47159 authored by Vadim Pasternak's avatar Vadim Pasternak Committed by Andy Shevchenko
Browse files

platform/x86: mlx-platform: Add mlxcpld-hotplug driver registration 



Add calls for mlxcpld-hotplug platform driver registration/unregistration
and add platform hotplug data configurations. This driver, when registered
within system will handle system hot-plug events for the power suppliers,
power cables and fans (insertion and removing). These events are
controlled through CPLD Lattice device.

Signed-off-by: default avatarVadim Pasternak <vadimp@mellanox.com>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent c3886c9d

drivers/platform/x86/mlx-platform.c

+97 −1
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ 
#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/platform_data/i2c-mux-reg.h>

#include <linux/platform_data/mlxcpld-hotplug.h>



#define MLX_PLAT_DEVICE_NAME		"mlxplat"
@@ -69,6 +70,7 @@ 
struct mlxplat_priv {

	struct platform_device *pdev_i2c;

	struct platform_device *pdev_mux[MLXPLAT_CPLD_LPC_MUX_DEVS];

	struct platform_device *pdev_hotplug;

};



/* Regions for LPC I2C controller and LPC base register space */
@@ -120,7 +122,87 @@ static struct i2c_mux_reg_platform_data mlxplat_mux_data[] = { 


};



static struct platform_device *mlxplat_dev;

/* Platform hotplug devices */

static struct mlxcpld_hotplug_device mlxplat_mlxcpld_hotplug_psu[] = {

	{

		.brdinfo = { I2C_BOARD_INFO("24c02", 0x51) },

		.bus = 10,

	},

	{

		.brdinfo = { I2C_BOARD_INFO("24c02", 0x50) },

		.bus = 10,

	},

};



static struct mlxcpld_hotplug_device mlxplat_mlxcpld_hotplug_pwr[] = {

	{

		.brdinfo = { I2C_BOARD_INFO("dps460", 0x59) },

		.bus = 10,

	},

	{

		.brdinfo = { I2C_BOARD_INFO("dps460", 0x58) },

		.bus = 10,

	},

};



static struct mlxcpld_hotplug_device mlxplat_mlxcpld_hotplug_fan[] = {

	{

		.brdinfo = { I2C_BOARD_INFO("24c32", 0x50) },

		.bus = 11,

	},

	{

		.brdinfo = { I2C_BOARD_INFO("24c32", 0x50) },

		.bus = 12,

	},

	{

		.brdinfo = { I2C_BOARD_INFO("24c32", 0x50) },

		.bus = 13,

	},

	{

		.brdinfo = { I2C_BOARD_INFO("24c32", 0x50) },

		.bus = 14,

	},

};



/* Platform hotplug default data */

static

struct mlxcpld_hotplug_platform_data mlxplat_mlxcpld_hotplug_default_data = {

	.top_aggr_offset = (MLXPLAT_CPLD_LPC_REG_BASE_ADRR | 0x3a),

	.top_aggr_mask = 0x48,

	.top_aggr_psu_mask = 0x08,

	.psu_reg_offset = (MLXPLAT_CPLD_LPC_REG_BASE_ADRR | 0x58),

	.psu_mask = 0x03,

	.psu_count = ARRAY_SIZE(mlxplat_mlxcpld_hotplug_psu),

	.psu = mlxplat_mlxcpld_hotplug_psu,

	.top_aggr_pwr_mask = 0x08,

	.pwr_reg_offset = (MLXPLAT_CPLD_LPC_REG_BASE_ADRR | 0x64),

	.pwr_mask = 0x03,

	.pwr_count = ARRAY_SIZE(mlxplat_mlxcpld_hotplug_pwr),

	.pwr = mlxplat_mlxcpld_hotplug_pwr,

	.top_aggr_fan_mask = 0x40,

	.fan_reg_offset = (MLXPLAT_CPLD_LPC_REG_BASE_ADRR | 0x88),

	.fan_mask = 0x0f,

	.fan_count = ARRAY_SIZE(mlxplat_mlxcpld_hotplug_fan),

	.fan = mlxplat_mlxcpld_hotplug_fan,

};



/* Platform hotplug MSN21xx system family data */

static

struct mlxcpld_hotplug_platform_data mlxplat_mlxcpld_hotplug_msn21xx_data = {

	.top_aggr_offset = (MLXPLAT_CPLD_LPC_REG_BASE_ADRR | 0x3a),

	.top_aggr_mask = 0x04,

	.top_aggr_pwr_mask = 0x04,

	.pwr_reg_offset = (MLXPLAT_CPLD_LPC_REG_BASE_ADRR | 0x64),

	.pwr_mask = 0x03,

	.pwr_count = ARRAY_SIZE(mlxplat_mlxcpld_hotplug_pwr),

};



static struct resource mlxplat_mlxcpld_hotplug_resources[] = {

	[0] = DEFINE_RES_IRQ_NAMED(17, "mlxcpld-hotplug"),

};



struct platform_device *mlxplat_dev;

struct mlxcpld_hotplug_platform_data *mlxplat_hotplug;



static int __init mlxplat_dmi_default_matched(const struct dmi_system_id *dmi)

{
@@ -131,6 +213,7 @@ static int __init mlxplat_dmi_default_matched(const struct dmi_system_id *dmi) 
		mlxplat_mux_data[i].n_values =

				ARRAY_SIZE(mlxplat_default_channels[i]);

	}

	mlxplat_hotplug = &mlxplat_mlxcpld_hotplug_default_data;



	return 1;

};
@@ -144,6 +227,7 @@ static int __init mlxplat_dmi_msn21xx_matched(const struct dmi_system_id *dmi) 
		mlxplat_mux_data[i].n_values =

				ARRAY_SIZE(mlxplat_msn21xx_channels);

	}

	mlxplat_hotplug = &mlxplat_mlxcpld_hotplug_msn21xx_data;



	return 1;

};
@@ -229,6 +313,16 @@ static int __init mlxplat_init(void) 
		}

	}



	priv->pdev_hotplug = platform_device_register_resndata(

				&mlxplat_dev->dev, "mlxcpld-hotplug", -1,

				mlxplat_mlxcpld_hotplug_resources,

				ARRAY_SIZE(mlxplat_mlxcpld_hotplug_resources),

				mlxplat_hotplug, sizeof(*mlxplat_hotplug));

	if (IS_ERR(priv->pdev_hotplug)) {

		err = PTR_ERR(priv->pdev_hotplug);

		goto fail_platform_mux_register;

	}



	return 0;



fail_platform_mux_register:
@@ -247,6 +341,8 @@ static void __exit mlxplat_exit(void) 
	struct mlxplat_priv *priv = platform_get_drvdata(mlxplat_dev);

	int i;



	platform_device_unregister(priv->pdev_hotplug);



	for (i = ARRAY_SIZE(mlxplat_mux_data) - 1; i >= 0 ; i--)

		platform_device_unregister(priv->pdev_mux[i]);