linux-kernel - Re: [PATCH 04/18] AT91: Rework ramc mapping code

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Date:	Thu, 3 Jul 2014 22:34:17 +0800
From:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
	linux@...im.org.za, Nicolas FERRE <nicolas.ferre@...el.com>,
	dwmw2@...radead.org, dbaryshkov@...il.com,
	Boris Brezillon <boris@...e-electrons.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Thomas Petazzoni <thomas@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 04/18] AT91: Rework ramc mapping code

patch 4 and 18 what is the difference?

Best Regards,
J.
On Jul 3, 2014, at 10:14 PM, Maxime Ripard <maxime.ripard@...e-electrons.com> wrote:

> 
> Adapt the ramc mapping code to handle multiple ram controllers in the DT.
> 
> Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
> ---
> arch/arm/mach-at91/setup.c | 26 ++++++++++++++------------
> 1 file changed, 14 insertions(+), 12 deletions(-)
> 
> diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c
> index 9c4c7fb323fb..cc520596f23b 100644
> --- a/arch/arm/mach-at91/setup.c
> +++ b/arch/arm/mach-at91/setup.c
> @@ -393,24 +393,26 @@ static void at91_dt_ramc(void)
> {
> 	struct device_node *np;
> 	const struct of_device_id *of_id;
> +	int idx = 0;
> 
> -	np = of_find_matching_node(NULL, ramc_ids);
> -	if (!np)
> -		panic(pr_fmt("unable to find compatible ram controller node in dtb\n"));
> +	for_each_matching_node(np, ramc_ids) {
> +		at91_ramc_base[idx] = of_iomap(np, 0);
> +		if (!at91_ramc_base[idx])
> +			panic(pr_fmt("unable to map ramc[%d] cpu registers\n"), idx);
> 
> -	at91_ramc_base[0] = of_iomap(np, 0);
> -	if (!at91_ramc_base[0])
> -		panic(pr_fmt("unable to map ramc[0] cpu registers\n"));
> -	/* the controller may have 2 banks */
> -	at91_ramc_base[1] = of_iomap(np, 1);
> +		idx++;
> +	}
> +
> +	if (!idx)
> +		panic(pr_fmt("unable to find compatible ram controller node in dtb\n"));
> 
> 	of_id = of_match_node(ramc_ids, np);
> -	if (!of_id)
> +	if (!of_id) {
> 		pr_warn("ramc no standby function available\n");
> -	else
> -		at91_pm_set_standby(of_id->data);
> +		return;
> +	}
> 
> -	of_node_put(np);
> +	at91_pm_set_standby(of_id->data);
> }
> 
> static struct of_device_id shdwc_ids[] = {
> -- 
> 2.0.1
> 

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