Re: regmap for i2c pages
On Thu, Jun 01, 2017 at 11:37:43PM -0700, Tim Harvey wrote: > I believe this is a very common i2c register mechanism but I'm not > clear what the best way to use i2c regmap for this is. I'm reading > that regmap 'handles register pages' but I'm not clear if that's the > same thing I'm looking for. If so, are there any examples of this? I > see several i2c drivers that reference pages but it looks to me that > each page is a different i2c slave address which is something > different. You're looking for regmap_range (search for window in regmap.h). signature.asc Description: PGP signature
regmap for i2c pages
I'm working on a driver for an i2c based media controller device that uses pages. By that I mean there are several pages of 8bit registers and a page-select register that holds the current page. Multiple accesses to the same page can occur without writing to this page register but if you want to access another page you need to update it. I believe this is a very common i2c register mechanism but I'm not clear what the best way to use i2c regmap for this is. I'm reading that regmap 'handles register pages' but I'm not clear if that's the same thing I'm looking for. If so, are there any examples of this? I see several i2c drivers that reference pages but it looks to me that each page is a different i2c slave address which is something different. Regards, Tim