Use of pinctrl-single for external device over I2C

On Wednesday 24 June 2015 07:03 PM, Tony Lindgren wrote:

* Vaibhav Hiremath [off-list ref] [150624 05:06]:

quoted

On Tuesday 23 June 2015 04:25 PM, Vaibhav Hiremath wrote:

quoted

/*
  * REVISIT: Reads and writes could eventually use regmap or something
  * generic. But at least on omaps, some mux registers are performance
  * critical as they may need to be remuxed every time before and after
  * idle. Adding tests for register access width for every read and
  * write like regmap is doing is not desired, and caching the registers
  * does not help in this case.
  */


Should be not have flag for this and use regmap_ variants? If we
implement flag based approach then same driver can be reused for pinmux
configuration of external device.

Nothing stopping you from adding regmap support to it. It just needs
to be made optional as the users so far don't need it.

Yeah, absolutely.

Thinking more on this,


I do not like this, as this is not HW feature, so DT may not be right
approach.


So I will dig more from either runtime or Compile time option to use
regmap_ Vs raw read/writes.


Thanks,
Vaibhav