On Thu, May 17, 2018 at 6:59 AM, H. Nikolaus Schaller <h...@goldelico.com> wrote:
> The register constants are so far defined in a way that they fit > for the pcal9555a when shifted by the number of banks, i.e. are > multiplied by 2 in the accessor function. > > Now, the pcal6524 has 3 banks which means the relative offset > is multiplied by 4 for the standard registers. > > Simply applying the bit shift to the extended registers gives > a wrong result, since the base offset is already included in > the offset. > > Therefore, we have to add code to the 24 bit accessor functions > that adjusts the register number for these exended registers. > > The formula finally used was developed and proposed by > Andy Shevchenko <andy.shevche...@gmail.com>. > > Suggested-by: Andy Shevchenko <andy.shevche...@gmail.com> > Signed-off-by: H. Nikolaus Schaller <h...@goldelico.com> Patch applied. Yours, Linus Walleij
