On Fri, Oct 02, 2020 at 10:48:32AM -0700, Stephen Boyd wrote: > Quoting Mark Brown (2020-10-02 09:03:24) > > ...and doing this in the dev_name() should help other diagnostic users > > (like dev_printk() for example). > Don't thinks like dev_printk() prefix the bus name? See > dev_driver_string()? So I agree that having the bus name is useful, but > confused why there are testing scripts and things on top of regmap > debugfs Not that I've ever noticed, eg on the console. > Put another way, why not introduce something similar to i2c-dev where > userspace can read/write registers for devices on the SPMI bus? > Otherwise I presume the test scripts inside Qualcomm are just reading > registers out of regmap? I know some other vendors use the regmap debugfs for their diagnostic tools (obviously not with SPMI). It's generally so they can get the benefit of the cache, it's a combination of allowing the state to be inspected while the driver has the device powered down and for devices on slower buses being much more performant.
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