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

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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: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Vadim Pasternak 2016-10-27 19:55:54 +00:00 committed by Andy Shevchenko
parent c3886c9d60
commit afc4715901
1 changed files with 97 additions and 1 deletions
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98
drivers/platform/x86/mlx-platform.c
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@ -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]);