On 26/02/14 20:03, Sebastian Reichel wrote:
Add a simple twl_i2c_read/write_u16 wrapper over
the twl_i2c_read/write, which is similar to the
twl_i2c_read/write_u8 wrapper.
Signed-off-by: Sebastian Reichel <sre@xxxxxxxxxx>
Acked-by: Lee Jones <lee.jones@xxxxxxxxxx>
Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx>
(I'll start a separate conversation about who will take this series in a mo).
---
include/linux/i2c/twl.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index ade1c06..d2b1670 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -195,6 +195,18 @@ static inline int twl_i2c_read_u8(u8 mod_no, u8 *val, u8 reg) {
return twl_i2c_read(mod_no, val, reg, 1);
}
Hmm. This had me confused for a few mins given word rights in i2c are guaranteed
to be little endian unless the swapped versions are used. I see that the twl
driver is using a generic i2c bulk write. Ah well, I can see that simplifies
the regmap i2c code and works in most cases...
+static inline int twl_i2c_write_u16(u8 mod_no, u16 val, u8 reg) {
+ val = cpu_to_le16(val);
+ return twl_i2c_write(mod_no, (u8*) &val, reg, 2);
+}
+
+static inline int twl_i2c_read_u16(u8 mod_no, u16 *val, u8 reg) {
+ int ret;
+ ret = twl_i2c_read(mod_no, (u8*) val, reg, 2);
+ *val = le16_to_cpu(*val);
+ return ret;
+}
+
int twl_get_type(void);
int twl_get_version(void);
int twl_get_hfclk_rate(void);
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