From: Florian Fainelli <f.faine...@gmail.com> Date: Mon, 16 Jan 2017 12:22:16 -0800
> On 01/16/2017 04:59 AM, yuan linyu wrote: >> On 日, 2017-01-15 at 18:21 +0100, Andrew Lunn wrote: >>> On Sun, Jan 15, 2017 at 09:51:03AM +0800, yuan linyu wrote: >>>> >>>> I hope user/developer can read this attribute file "regs" to do >>>> a full check of all registers value, and they can write any register >>>> inside PHY through this file. >>> Since this is intended for debug, it should not be sysfs, but debugfs. >> agree, >>> However, in general, Linux does not allow user space to peek and poke >>> device registers. Can you point me at examples where i can do the same >>> to my GPU? SATA controller? Ethernet controller, I2C temperature >>> sensor? Any device? >> we can read registers of ethernet controller(memory register accessed) >> through devmem or ethtool > > So why not add support in ethtool for reading PHY registers if you need > it? There are handful of PHY "things" in ethtool, such as reading > counters, configuring downshift etc., adding support for dumping > registers does not sound out of space. Agreed.
