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regulator: core: Add regulator_is_equal() helper 

commit b059b7e0ec upstream.

Add regulator_is_equal() helper to compare whether two regulators are
the same. This is useful for checking whether two separate regulators
in a driver are actually the same supply.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Igor Opaniuk <igor.opaniuk@toradex.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Link: https://lore.kernel.org/r/20191220164450.1395038-1-marex@denx.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Marek Vasut 2019-12-20 17:44:49 +01:00 committed by Greg Kroah-Hartman
parent c533cf50fd
commit 67d5b7a1f9
2 changed files with 21 additions and 0 deletions
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14
drivers/regulator/helpers.c
View File

@ -13,6 +13,8 @@
#include <linux/regulator/driver.h>
#include <linux/module.h>
#include "internal.h"
/**
* regulator_is_enabled_regmap - standard is_enabled() for regmap users
*
@ -881,3 +883,15 @@ void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
consumers[i].supply = supply_names[i];
}
EXPORT_SYMBOL_GPL(regulator_bulk_set_supply_names);
/**
* regulator_is_equal - test whether two regulators are the same
*
* @reg1: first regulator to operate on
* @reg2: second regulator to operate on
*/
bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2)
{
return reg1->rdev == reg2->rdev;
}
EXPORT_SYMBOL_GPL(regulator_is_equal);

7
include/linux/regulator/consumer.h
View File

@ -287,6 +287,8 @@ void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
const char *const *supply_names,
unsigned int num_supplies);
bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2);
#else
/*
@ -593,6 +595,11 @@ regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
{
}
static inline bool
regulator_is_equal(struct regulator *reg1, struct regulator *reg2);
{
return false;
}
#endif
static inline int regulator_set_voltage_triplet(struct regulator *regulator,