linux-kernel - [PATCH] regulator: extend the fixed voltage regulator to accept voltage

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Date:	Mon, 18 Jun 2012 10:19:42 +0200 (CEST)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	linux-kernel@...r.kernel.org
cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>
Subject: [PATCH] regulator: extend the fixed voltage regulator to accept
 voltage

Trivially extend the regulator_register_fixed() helper function to be even
more useful by letting it accept a voltage parameter. The original function
is provided as a wrapper macro.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@....de>
---
 drivers/regulator/fixed-helper.c |   21 ++++++++++++++++-----
 include/linux/regulator/fixed.h  |   10 ++++++----
 2 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/regulator/fixed-helper.c b/drivers/regulator/fixed-helper.c
index cacd33c..d979ff0 100644
--- a/drivers/regulator/fixed-helper.c
+++ b/drivers/regulator/fixed-helper.c
@@ -1,12 +1,17 @@
 #include <linux/slab.h>
+#include <linux/string.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/fixed.h>
 
+#define FIXED_BASE "fixed-dummy"
+#define FIXED_NAME FIXED_BASE "-00"
+
 struct fixed_regulator_data {
 	struct fixed_voltage_config cfg;
 	struct regulator_init_data init_data;
 	struct platform_device pdev;
+	char name[sizeof(FIXED_NAME)];
 };
 
 static void regulator_fixed_release(struct device *dev)
@@ -17,13 +22,14 @@ static void regulator_fixed_release(struct device *dev)
 }
 
 /**
- * regulator_register_fixed - register a no-op fixed regulator
+ * regulator_register_fixed_volt - register a no-op fixed regulator
  * @id: platform device id
  * @supplies: consumers for this regulator
  * @num_supplies: number of consumers
+ * @uv: voltage in microvolts
  */
-struct platform_device *regulator_register_fixed(int id,
-		struct regulator_consumer_supply *supplies, int num_supplies)
+struct platform_device *regulator_register_fixed_volt(int id,
+	struct regulator_consumer_supply *supplies, int num_supplies, int uv)
 {
 	struct fixed_regulator_data *data;
 
@@ -31,8 +37,13 @@ struct platform_device *regulator_register_fixed(int id,
 	if (!data)
 		return NULL;
 
-	data->cfg.supply_name = "fixed-dummy";
-	data->cfg.microvolts = 0;
+	if (id < 0)
+		strcpy(data->name, FIXED_BASE);
+	else
+		snprintf(data->name, sizeof(FIXED_NAME), FIXED_BASE "-%d", id);
+
+	data->cfg.supply_name = data->name;
+	data->cfg.microvolts = uv;
 	data->cfg.gpio = -EINVAL;
 	data->cfg.enabled_at_boot = 1;
 	data->cfg.init_data = &data->init_data;
diff --git a/include/linux/regulator/fixed.h b/include/linux/regulator/fixed.h
index f83f744..1735f0a 100644
--- a/include/linux/regulator/fixed.h
+++ b/include/linux/regulator/fixed.h
@@ -58,14 +58,16 @@ struct fixed_voltage_config {
 struct regulator_consumer_supply;
 
 #if IS_ENABLED(CONFIG_REGULATOR)
-struct platform_device *regulator_register_fixed(int id,
-		struct regulator_consumer_supply *supplies, int num_supplies);
+struct platform_device *regulator_register_fixed_volt(int id,
+	struct regulator_consumer_supply *supplies, int num_supplies, int uv);
 #else
-static inline struct platform_device *regulator_register_fixed(int id,
-		struct regulator_consumer_supply *supplies, int num_supplies)
+static inline struct platform_device *regulator_register_fixed_volt(int id,
+	struct regulator_consumer_supply *supplies, int num_supplies, int uv)
 {
 	return NULL;
 }
 #endif
 
+#define regulator_register_fixed(id, s, ns) regulator_register_fixed_volt(id, s, ns, 0)
+
 #endif
-- 
1.7.2.5

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