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authorMark Brown <broonie@kernel.org>2014-09-29 23:49:42 +0400
committerMark Brown <broonie@kernel.org>2014-09-29 23:49:42 +0400
commit45942c310da8eadc603e7d2332897909c1da4b70 (patch)
tree40ef6d2a4ac4d1a676d3c8e4b7a91460896bd7e2 /drivers/base/regmap
parent88507a2ba8b453a38b950f3ccb2cae6cc4d82e7a (diff)
parent6e64b6ccc1e46932768e3bb8974fc2e5589bca7a (diff)
downloadlinux-45942c310da8eadc603e7d2332897909c1da4b70.tar.xz
Merge remote-tracking branch 'regmap/topic/dt-endian' into regmap-next
Diffstat (limited to 'drivers/base/regmap')
-rw-r--r--drivers/base/regmap/regmap-i2c.c2
-rw-r--r--drivers/base/regmap/regmap-spi.c2
-rw-r--r--drivers/base/regmap/regmap.c79
3 files changed, 72 insertions, 11 deletions
diff --git a/drivers/base/regmap/regmap-i2c.c b/drivers/base/regmap/regmap-i2c.c
index ca193d1ef47c..053150a7f9f2 100644
--- a/drivers/base/regmap/regmap-i2c.c
+++ b/drivers/base/regmap/regmap-i2c.c
@@ -168,6 +168,8 @@ static struct regmap_bus regmap_i2c = {
.write = regmap_i2c_write,
.gather_write = regmap_i2c_gather_write,
.read = regmap_i2c_read,
+ .reg_format_endian_default = REGMAP_ENDIAN_BIG,
+ .val_format_endian_default = REGMAP_ENDIAN_BIG,
};
static const struct regmap_bus *regmap_get_i2c_bus(struct i2c_client *i2c,
diff --git a/drivers/base/regmap/regmap-spi.c b/drivers/base/regmap/regmap-spi.c
index 0eb3097c0d76..53d1148e80a0 100644
--- a/drivers/base/regmap/regmap-spi.c
+++ b/drivers/base/regmap/regmap-spi.c
@@ -109,6 +109,8 @@ static struct regmap_bus regmap_spi = {
.async_alloc = regmap_spi_async_alloc,
.read = regmap_spi_read,
.read_flag_mask = 0x80,
+ .reg_format_endian_default = REGMAP_ENDIAN_BIG,
+ .val_format_endian_default = REGMAP_ENDIAN_BIG,
};
/**
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 3a785a4f4ff6..d2f8a818d200 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -15,6 +15,7 @@
#include <linux/export.h>
#include <linux/mutex.h>
#include <linux/err.h>
+#include <linux/of.h>
#include <linux/rbtree.h>
#include <linux/sched.h>
@@ -448,6 +449,71 @@ int regmap_attach_dev(struct device *dev, struct regmap *map,
}
EXPORT_SYMBOL_GPL(regmap_attach_dev);
+static enum regmap_endian regmap_get_reg_endian(const struct regmap_bus *bus,
+ const struct regmap_config *config)
+{
+ enum regmap_endian endian;
+
+ /* Retrieve the endianness specification from the regmap config */
+ endian = config->reg_format_endian;
+
+ /* If the regmap config specified a non-default value, use that */
+ if (endian != REGMAP_ENDIAN_DEFAULT)
+ return endian;
+
+ /* Retrieve the endianness specification from the bus config */
+ if (bus && bus->reg_format_endian_default)
+ endian = bus->reg_format_endian_default;
+
+ /* If the bus specified a non-default value, use that */
+ if (endian != REGMAP_ENDIAN_DEFAULT)
+ return endian;
+
+ /* Use this if no other value was found */
+ return REGMAP_ENDIAN_BIG;
+}
+
+static enum regmap_endian regmap_get_val_endian(struct device *dev,
+ const struct regmap_bus *bus,
+ const struct regmap_config *config)
+{
+ struct device_node *np;
+ enum regmap_endian endian;
+
+ /* Retrieve the endianness specification from the regmap config */
+ endian = config->val_format_endian;
+
+ /* If the regmap config specified a non-default value, use that */
+ if (endian != REGMAP_ENDIAN_DEFAULT)
+ return endian;
+
+ /* If the dev and dev->of_node exist try to get endianness from DT */
+ if (dev && dev->of_node) {
+ np = dev->of_node;
+
+ /* Parse the device's DT node for an endianness specification */
+ if (of_property_read_bool(np, "big-endian"))
+ endian = REGMAP_ENDIAN_BIG;
+ else if (of_property_read_bool(np, "little-endian"))
+ endian = REGMAP_ENDIAN_LITTLE;
+
+ /* If the endianness was specified in DT, use that */
+ if (endian != REGMAP_ENDIAN_DEFAULT)
+ return endian;
+ }
+
+ /* Retrieve the endianness specification from the bus config */
+ if (bus && bus->val_format_endian_default)
+ endian = bus->val_format_endian_default;
+
+ /* If the bus specified a non-default value, use that */
+ if (endian != REGMAP_ENDIAN_DEFAULT)
+ return endian;
+
+ /* Use this if no other value was found */
+ return REGMAP_ENDIAN_BIG;
+}
+
/**
* regmap_init(): Initialise register map
*
@@ -551,17 +617,8 @@ struct regmap *regmap_init(struct device *dev,
map->reg_read = _regmap_bus_read;
}
- reg_endian = config->reg_format_endian;
- if (reg_endian == REGMAP_ENDIAN_DEFAULT)
- reg_endian = bus->reg_format_endian_default;
- if (reg_endian == REGMAP_ENDIAN_DEFAULT)
- reg_endian = REGMAP_ENDIAN_BIG;
-
- val_endian = config->val_format_endian;
- if (val_endian == REGMAP_ENDIAN_DEFAULT)
- val_endian = bus->val_format_endian_default;
- if (val_endian == REGMAP_ENDIAN_DEFAULT)
- val_endian = REGMAP_ENDIAN_BIG;
+ reg_endian = regmap_get_reg_endian(bus, config);
+ val_endian = regmap_get_val_endian(dev, bus, config);
switch (config->reg_bits + map->reg_shift) {
case 2: