linux-kernel - Re: [PATCH] clkdev: report over-sized strings when creating clkdev entries

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Message-ID: <7eda7621-0dde-4153-89e4-172e4c095d01@roeck-us.net>
Date: Fri, 17 May 2024 15:09:12 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc: linux-arm-kernel@...ts.infradead.org,
	Duanqiang Wen <duanqiangwen@...-swift.com>, mturquette@...libre.com,
	sboyd@...nel.org, linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clkdev: report over-sized strings when creating clkdev
 entries

Hi,

On Fri, Mar 15, 2024 at 11:47:55AM +0000, Russell King (Oracle) wrote:
> Report an error when an attempt to register a clkdev entry results in a
> truncated string so the problem can be easily spotted.
> 
> Reported by: Duanqiang Wen <duanqiangwen@...-swift.com>
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> Reviewed-by: Stephen Boyd <sboyd@...nel.org>

With this patch in the mainline kernel, I get

10000000.clock-controller:corepll: device ID is greater than 24
sifive-clk-prci 10000000.clock-controller: Failed to register clkdev for corepll: -12
sifive-clk-prci 10000000.clock-controller: could not register clocks: -12
sifive-clk-prci 10000000.clock-controller: probe with driver sifive-clk-prci failed with error -12
..
platform 10060000.gpio: deferred probe pending: platform: supplier 10000000.clock-controller not ready
platform 10010000.serial: deferred probe pending: platform: supplier 10000000.clock-controller not ready
platform 10011000.serial: deferred probe pending: platform: supplier 10000000.clock-controller not ready
platform 10040000.spi: deferred probe pending: platform: supplier 10000000.clock-controller not ready
platform 10050000.spi: deferred probe pending: platform: supplier 10000000.clock-controller not ready
platform 10090000.ethernet: deferred probe pending: platform: supplier 10000000.clock-controller not ready

when trying to boot sifive_u in qemu.

Apparently, "10000000.clock-controller" is too long. Any suggestion on
how to solve the problem ? I guess using dev_name(dev) as dev_id parameter
for clk_hw_register_clkdev() is not or no longer a good idea.
What else should be used instead ?

Thanks,
Guenter