linux-kernel - Re: [PATCH net-next 2/7] net: hibmcge: Add debugfs supported in this module

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Message-ID: <6a231891-7780-4cf4-97d9-679c67e18474@lunn.ch>
Date: Thu, 24 Oct 2024 16:21:11 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Jijie Shao <shaojijie@...wei.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, andrew+netdev@...n.ch, horms@...nel.org,
	shenjian15@...wei.com, wangpeiyang1@...wei.com,
	liuyonglong@...wei.com, chenhao418@...wei.com,
	sudongming1@...wei.com, xujunsheng@...wei.com,
	shiyongbang@...wei.com, libaihan@...wei.com,
	jonathan.cameron@...wei.com, shameerali.kolothum.thodi@...wei.com,
	salil.mehta@...wei.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 2/7] net: hibmcge: Add debugfs supported in this
 module

On Thu, Oct 24, 2024 at 10:06:14PM +0800, Jijie Shao wrote:
> 
> on 2024/10/24 20:05, Andrew Lunn wrote:
> > > > > +	seq_printf(s, "mdio frequency: %u\n", specs->mdio_frequency);
> > > > Is this interesting? Are you clocking it greater than 2.5MHz?
> > > MDIO controller supports 1MHz, 2.5MHz, 12.5MHz, and 25MHz
> > > Of course, we chose and tested 2.5M in actual work, but this can be modified.
> > How? What API are you using it allow it to be modified? Why cannot you
> > get the value using the same API?
> 
> This frequency cannot be modified dynamically.
> There are some specification registers that store some initialization configuration parameters
> written by the BMC, such as the default MAC address and hardware FIFO size and mdio frequency.
> 
> When the device is in prob, the driver reads the related configuration information and
> initializes the device based on the configuration.

Does the BMC have an API to set these values? And show these values?

	Andrew