linux-kernel - Re: [PATCHv4 2/5] arm: mvebu: support for SMP on 98DX3336 SoC

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Message-ID: <20170119004750.GC4857@codeaurora.org>
Date:   Wed, 18 Jan 2017 16:47:50 -0800
From:   Stephen Boyd <sboyd@...eaurora.org>
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...e-electrons.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Florian Fainelli <f.fainelli@...il.com>,
        Chris Brand <chris.brand@...adcom.com>,
        Juri Lelli <juri.lelli@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        Jayachandran C <jchandra@...adcom.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv4 2/5] arm: mvebu: support for SMP on 98DX3336 SoC

On 01/13, Chris Packham wrote:
> diff --git a/arch/arm/mach-mvebu/platsmp.c b/arch/arm/mach-mvebu/platsmp.c
> index 46c742d3bd41..59be3ca0464f 100644
> --- a/arch/arm/mach-mvebu/platsmp.c
> +++ b/arch/arm/mach-mvebu/platsmp.c
> @@ -184,3 +184,89 @@ const struct smp_operations armada_xp_smp_ops __initconst = {
>  
>  CPU_METHOD_OF_DECLARE(armada_xp_smp, "marvell,armada-xp-smp",
>  		      &armada_xp_smp_ops);
> +
> +struct resume_controller {
> +	u32 resume_control;
> +	u32 resume_boot_addr;
> +};
> +
> +static const struct resume_controller mv98dx3336_resume_controller = {
> +	.resume_control = 0x08,
> +	.resume_boot_addr = 0x04,
> +};
> +
> +static const struct of_device_id of_mv98dx3236_resume_table[] = {
> +	{
> +		.compatible = "marvell,98dx3336-resume-ctrl",
> +		.data = (void *)&mv98dx3336_resume_controller,

Useless cast?

> +	},
> +	{ /* end of list */ },
> +};
> +
> +static int mv98dx3236_resume_set_cpu_boot_addr(int hw_cpu, void *boot_addr)
> +{
> +	const struct of_device_id *match;
> +	struct device_node *np;
> +	void __iomem *base;
> +	struct resume_controller *rc;
> +
> +	WARN_ON(hw_cpu != 1);
> +
> +	np = of_find_matching_node_and_match(NULL, of_mv98dx3236_resume_table,
> +					     &match);
> +	if (!np)
> +		return -ENODEV;
> +
> +	base = of_io_request_and_map(np, 0, of_node_full_name(np));
> +	rc = (struct resume_controller *)match->data;

Useless cast?

> +	of_node_put(np);
> +	if (IS_ERR(base))
> +		return PTR_ERR(base);
> +
> +	writel(0, base + rc->resume_control);
> +	writel(virt_to_phys(boot_addr), base + rc->resume_boot_addr);
> +

Otherwise

Reviewed-by: Stephen Boyd <sboyd@...eaurora.org>

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