Devices such as the AD5628 require 32 bits of data divided in 12 bits
for dummy, command and address, and 20 for data and dummy. Eg:
XXXXCCCCAAAADDDDDDDDDDDDDDDDXXXX
Where X is dont care, C is command, A is address and D is data bits.
Which would requierd the following regmap_config:
static const struct regmap_config config_dac = {
.reg_bits = 12,
.val_bits = 20,
.max_register = 0xff,
};
Signed-off-by: Ricardo Ribalda <ribalda@kernel.org>
Link: https://lore.kernel.org/r/20200917114727.1120373-1-ribalda@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
return true;
}
+static void regmap_format_12_20_write(struct regmap *map,
+ unsigned int reg, unsigned int val)
+{
+ u8 *out = map->work_buf;
+
+ out[0] = reg >> 4;
+ out[1] = (reg << 4) | (val >> 16);
+ out[2] = val >> 8;
+ out[3] = val;
+}
+
+
static void regmap_format_2_6_write(struct regmap *map,
unsigned int reg, unsigned int val)
{
}
break;
+ case 12:
+ switch (config->val_bits) {
+ case 20:
+ map->format.format_write = regmap_format_12_20_write;
+ break;
+ default:
+ goto err_hwlock;
+ }
+ break;
+
case 8:
map->format.format_reg = regmap_format_8;
break;