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regulator: core: Add regulator_is_equal() helper
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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>
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Marek Vasut authored and Mark Brown committed Jan 14, 2020

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1 parent e42617b commit b059b7e
Showing 2 changed files with 21 additions and 0 deletions.
14 changes: 14 additions & 0 deletions drivers/regulator/helpers.c
Original file line number Diff line number Diff line change
@@ -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 changes: 7 additions & 0 deletions include/linux/regulator/consumer.h
Original file line number Diff line number Diff line change
@@ -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,

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