linux-kernel - [PATCH 1/4] regulator: provide regulator_bulk_set_supply

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Date:   Fri, 30 Aug 2019 09:17:37 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Jens Axboe <axboe@...nel.dk>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        JC Kuo <jckuo@...dia.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-ide@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 1/4] regulator: provide regulator_bulk_set_supply_names()

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

There are many regulator consumers who - before using the regulator
bulk functions - set the supply names in regulator_bulk_data using
a for loop.

Let's provide a simple helper in the consumer API that allows users
to do the same with a single function call.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 drivers/regulator/helpers.c        | 21 +++++++++++++++++++++
 include/linux/regulator/consumer.h | 12 ++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c
index 4986cc5064a1..ca3dc3f3bb29 100644
--- a/drivers/regulator/helpers.c
+++ b/drivers/regulator/helpers.c
@@ -860,3 +860,24 @@ int regulator_get_current_limit_regmap(struct regulator_dev *rdev)
 	return -EINVAL;
 }
 EXPORT_SYMBOL_GPL(regulator_get_current_limit_regmap);
+
+/**
+ * regulator_bulk_set_supply_names - initialize the 'supply' fields in an array
+ *                                   of regulator_bulk_data structs
+ *
+ * @consumers: array of regulator_bulk_data entries to initialize
+ * @supply_names: array of supply name strings
+ * @num_supplies: number of supply names to initialize
+ *
+ * Note: the 'consumers' array must be the size of 'num_supplies'.
+ */
+void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
+				     const char *const *supply_names,
+				     unsigned int num_supplies)
+{
+	unsigned int i;
+
+	for (i = 0; i < num_supplies; i++)
+		consumers[i].supply = supply_names[i];
+}
+EXPORT_SYMBOL_GPL(regulator_bulk_set_supply_names);
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index 815983419375..6d2181a76987 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -281,6 +281,12 @@ void devm_regulator_unregister_notifier(struct regulator *regulator,
 void *regulator_get_drvdata(struct regulator *regulator);
 void regulator_set_drvdata(struct regulator *regulator, void *data);
 
+/* misc helpers */
+
+void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
+				     const char *const *supply_names,
+				     unsigned int num_supplies);
+
 #else
 
 /*
@@ -580,6 +586,12 @@ static inline int regulator_list_voltage(struct regulator *regulator, unsigned s
 	return -EINVAL;
 }
 
+void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
+				     const char *const *supply_names,
+				     unsigned int num_supplies)
+{
+}
+
 #endif
 
 static inline int regulator_set_voltage_triplet(struct regulator *regulator,
-- 
2.21.0