Subject: [PATCH V2 1/4] ARM: tegra: pmc: convert PMC driver to support DT only

From: [email-masked] (Stephen Warren)
Date: Wed, 27 Feb 2013 11:53:40 -0700

On 02/26/2013 07:28 PM, Joseph Lo wrote:
> The Tegra kernel only support boot from DT now. Clean up the PMC driver
> to support DT only, that includes:
> 
> * remove the ifdef of CONFIG_OF
> * replace the static mapping of PMC addr to map from DT

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

>  static inline void tegra_pmc_writel(u32 val, u32 reg)
>  {
> -	writel(val, IO_ADDRESS(TEGRA_PMC_BASE + reg));
> +	writel(val, (tegra_pmc_base + reg));

There are redundant () there.

> +static void tegra_pmc_parse_dt(void)
>  {
> +	struct device_node *np;
>  
> +	np = of_find_matching_node(NULL, matches);
> +	if (np) {

Why not:

BUG_ON(!np);

That way, you can get rid of if if/else blocks, and remove one level of
indentation throughout this function. I already mentioned this internally...