6 Jan
2015
6 Jan
'15
7:11 a.m.
Hi Simon,
On Sat, 27 Dec 2014 10:32:38 -0700 Simon Glass sjg@chromium.org wrote:
[2] It is difficult to describe alias register name for the same address.
For example,
#define I2C_DTTX 0x04 /* send FIFO */ #define I2C_DTRX 0x04 /* receive FIFO */
DTTX is write-only register. DTRX is read-only register.
They are assigned to the same address.
You could use fifo or rx_tx or data. Of even a #define if you can't avoid it.
There has been quite a bit of discussion about this U-Boot design decision. I think Albert is the main expert.
Finally, I posted v4 using a structure for register access.
Best Regards Masahiro Yamada