linux-kernel - Re: [PATCH v3 3/7] clk: Add of_clk_hw_register() API for early clk drivers

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Message-ID: <155491496818.20095.15093722814125773505@swboyd.mtv.corp.google.com>
Date:   Wed, 10 Apr 2019 09:49:28 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Jeffrey Hugo <jhugo@...eaurora.org>,
        Michael Turquette <mturquette@...libre.com>
Cc:     linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Russell King <linux@...linux.org.uk>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v3 3/7] clk: Add of_clk_hw_register() API for early clk drivers

Quoting Jeffrey Hugo (2019-04-08 14:46:11)
> On 4/4/2019 3:53 PM, Stephen Boyd wrote:
> > In some circumstances drivers register clks early and don't have access
> > to a struct device because the device model isn't initialized yet. Add
> > an API to let drivers register clks associated with a struct device_node
> > so that these drivers can participate in getting parent clks through DT.
> 
> NACK.  This patch broke boot for me.  I had to pull the below from JTAG. 

No early printk support on this board? Sadness.

>   What do you need to debug this?
> 

Hopefully nothing.

> [    0.000000] Unable to handle kernel read from unreadable memory at 
> virtual address 0000000000000280

I guess you pass NULL as dev to clk_hw_register(). Will fix! Thanks for
testing.

> [    0.000000] Mem abort info: