On Mon, May 31, 2021 at 6:33 PM Sander Vanheule <sander@xxxxxxxxxxxxx> wrote: > On Mon, 2021-05-31 at 14:16 +0300, Andy Shevchenko wrote: > > On Monday, May 31, 2021, Michael Walle <michael@xxxxxxxx> wrote: > > > Am 2021-05-31 10:36, schrieb Sander Vanheule: > Am I missing something here? It seems to me like the regmap interface can't > really accommodate what's required, unless maybe the rtl8231 regmap users > perform some manual locking. This all seems terribly complicated compared to > using an internal output-value cache inside regmap-gpio. Have you had a chance to look into the PCA953x driver? Sounds to me that you are missing the APIs that regmap provides. -- With Best Regards, Andy Shevchenko