On Wed, Apr 5, 2017 at 12:07 PM, Richard Fitzgerald rf@opensource.wolfsonmicro.com wrote:
This patch adds a header file of register definitions for Cirrus Logic "Madera" class codecs. These codecs are all based off a common set of hardware IP so have a common register map (with a few minor device-to-device variations). These are complex devices with a large mber of features and so have a correspondingly large register set. The registers.h file has been auto-generated from the hardware register definitions, stripped down to only registers we need to access from the driver.
Signed-off-by: Richard Fitzgerald rf@opensource.wolfsonmicro.com
This: include/linux/mfd/madera/registers.h | 8832 ++++++++++++++++++++++++++++++++++
Get included in all subdrivers I suppose?
So you are broadcasting 8800+ lines into every subdriver across the entire kernel.
Just the time spent in the preprocessor parsing this will affect compilation time.
Please implement separation of concerns. Move the register definitions into the drivers, and if they are too large, atleast make a local include file in sound/soc for the codec parts so the GPIO subdriver does not have to churn through all this to get its job done.
I know there are other MFD drivers doing this but it's not a good pattern.
Yours, Linus Walleij