Re: [PATCH] arm: tegra: fuse: export chip id and revision

[Stephen Warren <swarren@wwwdotorg.org>]

On 03/11/2013 06:37 AM, Danny Huang wrote:
> Expose tegra chip id and revision in /proc/cpu/chipinfo for user mode
> usage.

I agree with Shawn's comments, but I have a few other comments here too
for the record.

Nit: "Tegra" and "ID" above should be capitalized as I've done so in
this sentence.

> diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c

> +static int __init tegra_chip_info(void)
> +{
> +	proc_entry = create_proc_entry("cpu/chipinfo", S_IRUGO, NULL);
> +	if (proc_entry)
> +		proc_entry->read_proc = show_chip_info;
> +	return 0;
> +}
> +
> +late_initcall(tegra_chip_info);

Please don't introduce any more initcalls. Especially initcalls that are
not conditional on the run-time (rather than compile-time) SoC. This
code may be compiled into a kernel that supports SoCs other than Tegra.
However, tegra_chip_info() shouldn't run on those SoCs.

It'd probably be simplest to just perform this initialization as part of
the already-existing tegra_init_fuse(). If not, please call this
initialization function from one of the initialization functions in
arch/arm/mach-tegra/common.c. Both those cases only execute on Tegra.