regmap: Add support for 10/14 register formating

This patch adds support for 10 bits register, 14 bits value type register
formating. This is for example used by the Analog Devices AD5380.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index b96cf7202860fac6ff6badb6e11de290eced07e4..e533368e5598bec983e1c85117519a20fa78f6ae 100644 (file)
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -90,6 +90,16 @@ static void regmap_format_7_9_write(struct regmap *map,
        *out = cpu_to_be16((reg << 9) | val);
 }
 
+static void regmap_format_10_14_write(struct regmap *map,
+                                   unsigned int reg, unsigned int val)
+{
+       u8 *out = map->work_buf;
+
+       out[2] = val;
+       out[1] = (val >> 8) | (reg << 6);
+       out[0] = reg >> 2;
+}
+
 static void regmap_format_8(void *buf, unsigned int val)
 {
        u8 *b = buf;
@@ -188,6 +198,16 @@ struct regmap *regmap_init(struct device *dev,
                }
                break;
 
+       case 10:
+               switch (config->val_bits) {
+               case 14:
+                       map->format.format_write = regmap_format_10_14_write;
+                       break;
+               default:
+                       goto err_map;
+               }
+               break;
+
        case 8:
                map->format.format_reg = regmap_format_8;
                break;