Commit 1e91a2e5 authored by Ruslan Babayev's avatar Ruslan Babayev Committed by David S. Miller
Browse files

i2c: acpi: export i2c_acpi_find_adapter_by_handle 



This allows drivers to lookup i2c adapters on ACPI based systems similar to
of_get_i2c_adapter_by_node() with DT based systems.

Signed-off-by: default avatarRuslan Babayev <ruslan@babayev.com>
Cc: xe-linux-external@cisco.com
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 517f4c49

drivers/i2c/i2c-core-acpi.c

+2 −1
Original line number Diff line number Diff line
@@ -337,7 +337,7 @@ static int i2c_acpi_find_match_device(struct device *dev, void *data) 
	return ACPI_COMPANION(dev) == data;

}



static struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)

struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)

{

	struct device *dev;
@@ -345,6 +345,7 @@ static struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle) 
			      i2c_acpi_find_match_adapter);

	return dev ? i2c_verify_adapter(dev) : NULL;

}

EXPORT_SYMBOL_GPL(i2c_acpi_find_adapter_by_handle);



static struct i2c_client *i2c_acpi_find_client_by_adev(struct acpi_device *adev)

{

include/linux/i2c.h

+6 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#ifndef _LINUX_I2C_H

#define _LINUX_I2C_H



#include <linux/acpi.h>		/* for acpi_handle */

#include <linux/mod_devicetable.h>

#include <linux/device.h>	/* for struct device */

#include <linux/sched.h>	/* for completion */
@@ -981,6 +982,7 @@ bool i2c_acpi_get_i2c_resource(struct acpi_resource *ares, 
u32 i2c_acpi_find_bus_speed(struct device *dev);

struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,

				       struct i2c_board_info *info);

struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle);

#else

static inline bool i2c_acpi_get_i2c_resource(struct acpi_resource *ares,

					     struct acpi_resource_i2c_serialbus **i2c)
@@ -996,6 +998,10 @@ static inline struct i2c_client *i2c_acpi_new_device(struct device *dev, 
{

	return NULL;

}

static inline struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle)

{

	return NULL;

}

#endif /* CONFIG_ACPI */



#endif /* _LINUX_I2C_H */

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