linux-kernel - [PATCH v4 01/10] regmap: Introduce regmap_get_max

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Date:	Mon, 30 Mar 2015 22:56:27 +0100
From:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Rob Herring <robh+dt@...nel.org>,
	Kumar Gala <galak@...eaurora.org>,
	Mark Brown <broonie@...nel.org>, s.hauer@...gutronix.de,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	arnd@...db.de, sboyd@...eaurora.org,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v4 01/10] regmap: Introduce regmap_get_max_register.

This patch introduces regmap_get_max_register() function which would be
used by the infrastructures like eeprom framework built on top of
regmap.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/base/regmap/regmap.c | 12 ++++++++++++
 include/linux/regmap.h       |  7 +++++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index f99b098..d703921 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -2617,6 +2617,18 @@ int regmap_get_val_bytes(struct regmap *map)
 }
 EXPORT_SYMBOL_GPL(regmap_get_val_bytes);
 
+/**
+ * regmap_get_max_register(): Report the max register value
+ *
+ * Report the max register value, mainly intended to for use by
+ * generic infrastructure built on top of regmap.
+ */
+int regmap_get_max_register(struct regmap *map)
+{
+	return map->max_register ? : -EINVAL;
+}
+EXPORT_SYMBOL_GPL(regmap_get_max_register);
+
 int regmap_parse_val(struct regmap *map, const void *buf,
 			unsigned int *val)
 {
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 116655d..2d87ded 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -433,6 +433,7 @@ int regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
 				   unsigned int mask, unsigned int val,
 				   bool *change);
 int regmap_get_val_bytes(struct regmap *map);
+int regmap_get_max_register(struct regmap *map);
 int regmap_async_complete(struct regmap *map);
 bool regmap_can_raw_write(struct regmap *map);
 
@@ -676,6 +677,12 @@ static inline int regmap_get_val_bytes(struct regmap *map)
 	return -EINVAL;
 }
 
+static inline int regmap_get_max_register(struct regmap *map)
+{
+	WARN_ONCE(1, "regmap API is disabled");
+	return -EINVAL;
+}
+
 static inline int regcache_sync(struct regmap *map)
 {
 	WARN_ONCE(1, "regmap API is disabled");
-- 
1.9.1

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