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

[Guenter Roeck]

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 at net-swift.com>
> Signed-off-by: Russell King (Oracle) <rmk+kernel at armlinux.org.uk>
> Reviewed-by: Stephen Boyd <sboyd at kernel.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