linux-kernel - Re: [PATCH v8 1/3] ARM: EXYNOS: Add support for EXYNOS5410 SoC

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Date:	Fri, 25 Apr 2014 15:52:54 -0700
From:	Kevin Hilman <khilman@...aro.org>
To:	Tarek Dakhran <t.dakhran@...sung.com>
Cc:	linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Rob Landley <rob@...dley.net>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Russell King <linux@....linux.org.uk>,
	Ben Dooks <ben-linux@...ff.org>,
	Tomasz Figa <t.figa@...sung.com>,
	Mike Turquette <mturquette@...aro.org>,
	Vyacheslav Tyrtov <v.tyrtov@...sung.com>,
	Thomas Abraham <thomas.abraham@...aro.org>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Romain Naour <romain.naour@...nwide.fr>,
	Chander Kashyap <chander.kashyap@...aro.org>,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	Tarek Dakhran <t.dakhran@...il.com>
Subject: Re: [PATCH v8 1/3] ARM: EXYNOS: Add support for EXYNOS5410 SoC

Tarek Dakhran <t.dakhran@...sung.com> writes:

> EXYNOS5410 is SoC in Samsung's Exynos5 SoC series.
> Add initial support for this SoC.
>
> Signed-off-by: Tarek Dakhran <t.dakhran@...sung.com>
> Signed-off-by: Vyacheslav Tyrtov <v.tyrtov@...sung.com>
> Reviewed-by: Tomasz Figa <t.figa@...sung.com>

[...]

> diff --git a/arch/arm/mach-exynos/hotplug.c b/arch/arm/mach-exynos/hotplug.c
> index 5eead53..83ae5fb 100644
> --- a/arch/arm/mach-exynos/hotplug.c
> +++ b/arch/arm/mach-exynos/hotplug.c
> @@ -95,8 +95,8 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
>  	for (;;) {
>  
>  		/* make cpu1 to be turned off at next WFI command */
> -		if (cpu == 1)
> -			__raw_writel(0, S5P_ARM_CORE1_CONFIGURATION);
> +		if (cpu > 0)
> +			__raw_writel(0, S5P_ARM_CORE_CONFIGURATION(cpu));

This looks like a fix that's probably not specific to the 5410 and maybe
deserves it's own patch?

[...]

> @@ -107,14 +111,14 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
>  	 */
>  	write_pen_release(phys_cpu);
>  
> -	if (!(__raw_readl(S5P_ARM_CORE1_STATUS) & S5P_CORE_LOCAL_PWR_EN)) {
> +	if (!(__raw_readl(S5P_ARM_CORE_STATUS(cpu)) & S5P_CORE_LOCAL_PWR_EN)) {
>  		__raw_writel(S5P_CORE_LOCAL_PWR_EN,
> -			     S5P_ARM_CORE1_CONFIGURATION);
> +			     S5P_ARM_CORE_CONFIGURATION(cpu));
>  
>  		timeout = 10;
>  
>  		/* wait max 10 ms until cpu1 is on */
> -		while ((__raw_readl(S5P_ARM_CORE1_STATUS)
> +		while ((__raw_readl(S5P_ARM_CORE_STATUS(cpu))
>  			& S5P_CORE_LOCAL_PWR_EN) != S5P_CORE_LOCAL_PWR_EN) {
>  			if (timeout-- == 0)
>  				break;

...and this hunk too?

Kevin
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