On Wed, Aug 3, 2022 at 5:56 PM Colin Foster <colin.foster@xxxxxxxxxxxxxxxx> wrote: > On Wed, Aug 03, 2022 at 01:45:04PM +0200, Andy Shevchenko wrote: > > On Wed, Aug 3, 2022 at 7:48 AM Colin Foster > > <colin.foster@xxxxxxxxxxxxxxxx> wrote: ... > > > + regmap_config.max_register = res->end - res->start; > > > > Hmm... First of all, resource_size() is for that (with - 1 to the > > result). But don't you need to use stride in the calculations? > > DEFINE_RES_NAMED populates the resource .end with (_start) + (_size) - 1 > so I don't think resource_size is correct to use here. Have you read what I put in parentheses? Basically it becomes very well the same as a result, but in a cleaner manner (you calculate resource size - 1 which will be exactly the last byte offset of the register file), no? > reg_stride gets handled at the top of regmap_read(), so I don't think > that's really needed either. Okay. > For reference: > > #define VSC7512_DEVCPU_ORG_RES_START 0x71000000 > #define VSC7512_DEVCPU_ORG_RES_SIZE 0x38 Right, for 0x38 you supply 0x37, which is exactly resource_size() - 1. > # cat range > 0-34 -- With Best Regards, Andy Shevchenko
