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Commit 8de2f081 authored by Mark Brown's avatar Mark Brown
Browse files

regmap: Add functions to check for access on registers 



We're going to be using these in quite a few places so factor out the
readable/writable/volatile/precious checks.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 13c54137

drivers/base/regmap/internal.h

+5 −0
Original line number Diff line number Diff line
@@ -48,6 +48,11 @@ struct regmap { 
	bool (*precious_reg)(struct device *dev, unsigned int reg);

};



bool regmap_writeable(struct regmap *map, unsigned int reg);

bool regmap_readable(struct regmap *map, unsigned int reg);

bool regmap_volatile(struct regmap *map, unsigned int reg);

bool regmap_precious(struct regmap *map, unsigned int reg);



#ifdef CONFIG_DEBUG_FS

extern void regmap_debugfs_initcall(void);

extern void regmap_debugfs_init(struct regmap *map);

drivers/base/regmap/regmap-debugfs.c

+2 −4
Original line number Diff line number Diff line
@@ -52,12 +52,10 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf, 
	tot_len = reg_len + val_len + 3;      /* : \n */



	for (i = 0; i < map->max_register; i++) {

		if (map->readable_reg &&

		    !map->readable_reg(map->dev, i))

		if (!regmap_readable(map, i))

			continue;



		if (map->precious_reg &&

		    map->precious_reg(map->dev, i))

		if (regmap_precious(map, i))

			continue;



		/* If we're in the region the user is trying to read */

drivers/base/regmap/regmap.c

+44 −0
Original line number Diff line number Diff line
@@ -20,6 +20,50 @@ 


#include "internal.h"



bool regmap_writeable(struct regmap *map, unsigned int reg)

{

	if (map->max_register && reg > map->max_register)

		return false;



	if (map->writeable_reg)

		return map->writeable_reg(map->dev, reg);



	return true;

}



bool regmap_readable(struct regmap *map, unsigned int reg)

{

	if (map->max_register && reg > map->max_register)

		return false;



	if (map->readable_reg)

		return map->readable_reg(map->dev, reg);



	return true;

}



bool regmap_volatile(struct regmap *map, unsigned int reg)

{

	if (map->max_register && reg > map->max_register)

		return false;



	if (map->volatile_reg)

		return map->volatile_reg(map->dev, reg);



	return true;

}



bool regmap_precious(struct regmap *map, unsigned int reg)

{

	if (map->max_register && reg > map->max_register)

		return false;



	if (map->precious_reg)

		return map->precious_reg(map->dev, reg);



	return false;

}



static void regmap_format_4_12_write(struct regmap *map,

				     unsigned int reg, unsigned int val)

{