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-rw-r--r--drivers/platform/mellanox/mlxreg-hotplug.c7
-rw-r--r--drivers/platform/x86/mlx-platform.c10
-rw-r--r--include/linux/platform_data/mlxreg.h2
3 files changed, 19 insertions, 0 deletions
diff --git a/drivers/platform/mellanox/mlxreg-hotplug.c b/drivers/platform/mellanox/mlxreg-hotplug.c
index 313cf8ad77bf..fe4910bc0f96 100644
--- a/drivers/platform/mellanox/mlxreg-hotplug.c
+++ b/drivers/platform/mellanox/mlxreg-hotplug.c
@@ -550,6 +550,7 @@ static int mlxreg_hotplug_probe(struct platform_device *pdev)
{
struct mlxreg_core_hotplug_platform_data *pdata;
struct mlxreg_hotplug_priv_data *priv;
+ struct i2c_adapter *deferred_adap;
int err;
pdata = dev_get_platdata(&pdev->dev);
@@ -558,6 +559,12 @@ static int mlxreg_hotplug_probe(struct platform_device *pdev)
return -EINVAL;
}
+ /* Defer probing if the necessary adapter is not configured yet. */
+ deferred_adap = i2c_get_adapter(pdata->deferred_nr);
+ if (!deferred_adap)
+ return -EPROBE_DEFER;
+ i2c_put_adapter(deferred_adap);
+
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index 71b452a89a6e..67f3c6d36988 100644
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -697,6 +697,8 @@ static int __init mlxplat_dmi_default_matched(const struct dmi_system_id *dmi)
ARRAY_SIZE(mlxplat_default_channels[i]);
}
mlxplat_hotplug = &mlxplat_mlxcpld_default_data;
+ mlxplat_hotplug->deferred_nr =
+ mlxplat_default_channels[i - 1][MLXPLAT_CPLD_GRP_CHNL_NUM - 1];
return 1;
};
@@ -711,6 +713,8 @@ static int __init mlxplat_dmi_msn21xx_matched(const struct dmi_system_id *dmi)
ARRAY_SIZE(mlxplat_msn21xx_channels);
}
mlxplat_hotplug = &mlxplat_mlxcpld_msn21xx_data;
+ mlxplat_hotplug->deferred_nr =
+ mlxplat_msn21xx_channels[MLXPLAT_CPLD_GRP_CHNL_NUM - 1];
return 1;
};
@@ -725,6 +729,8 @@ static int __init mlxplat_dmi_msn274x_matched(const struct dmi_system_id *dmi)
ARRAY_SIZE(mlxplat_msn21xx_channels);
}
mlxplat_hotplug = &mlxplat_mlxcpld_msn274x_data;
+ mlxplat_hotplug->deferred_nr =
+ mlxplat_msn21xx_channels[MLXPLAT_CPLD_GRP_CHNL_NUM - 1];
return 1;
};
@@ -739,6 +745,8 @@ static int __init mlxplat_dmi_msn201x_matched(const struct dmi_system_id *dmi)
ARRAY_SIZE(mlxplat_msn21xx_channels);
}
mlxplat_hotplug = &mlxplat_mlxcpld_msn201x_data;
+ mlxplat_hotplug->deferred_nr =
+ mlxplat_default_channels[i - 1][MLXPLAT_CPLD_GRP_CHNL_NUM - 1];
return 1;
};
@@ -753,6 +761,8 @@ static int __init mlxplat_dmi_qmb7xx_matched(const struct dmi_system_id *dmi)
ARRAY_SIZE(mlxplat_msn21xx_channels);
}
mlxplat_hotplug = &mlxplat_mlxcpld_default_ng_data;
+ mlxplat_hotplug->deferred_nr =
+ mlxplat_msn21xx_channels[MLXPLAT_CPLD_GRP_CHNL_NUM - 1];
return 1;
};
diff --git a/include/linux/platform_data/mlxreg.h b/include/linux/platform_data/mlxreg.h
index fcdc707eab99..262910967476 100644
--- a/include/linux/platform_data/mlxreg.h
+++ b/include/linux/platform_data/mlxreg.h
@@ -129,6 +129,7 @@ struct mlxreg_core_platform_data {
* @mask: top aggregation interrupt common mask;
* @cell_low: location of low aggregation interrupt register;
* @mask_low: low aggregation interrupt common mask;
+ * @deferred_nr: I2C adapter number must be exist prior probing execution;
*/
struct mlxreg_core_hotplug_platform_data {
struct mlxreg_core_item *items;
@@ -139,6 +140,7 @@ struct mlxreg_core_hotplug_platform_data {
u32 mask;
u32 cell_low;
u32 mask_low;
+ int deferred_nr;
};
#endif /* __LINUX_PLATFORM_DATA_MLXREG_H */