linux-kernel - Re: [PATCH 2/2 v4] Add DIU platform code for MPC8610HPCD

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Date:	Fri, 28 Mar 2008 12:19:25 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	York Sun <yorksun@...escale.com>
CC:	linux-fbdev-devel@...ts.sourceforge.net, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	galak@...nel.crashing.org, a.p.zijlstra@...llo.nl,
	Timur Tabi <timur@...escale.com>
Subject: Re: [PATCH 2/2 v4] Add DIU platform code for MPC8610HPCD

York Sun wrote:
> +	np = of_find_compatible_node(NULL, NULL, "fsl,fpga-pixis");
> +	if (np) {
> +		of_address_to_resource(np, 0, &r);
> +		of_node_put(np);
> +		pixis_bdcfg0 = ioremap(r.start + 0x00000008, sizeof(u8));
> +		if (!pixis_bdcfg0) {
> +			printk(KERN_ERR "Err: can't map FPGA cfg register!\n");
> +			return;
> +		}
> +		pixis_arch = ioremap(r.start + 0x00000001, sizeof(u8));
> +		if (!pixis_arch) {
> +			printk(KERN_ERR "Err: can't map FPGA arch register!\n");
> +			return;
> +		}

Just of_iomap() the whole resource, rather than doing it a byte at a time.

> +int __init preallocate_diu_videomemory(void)
> +{
> +	pr_debug("diu_size=%lu\n", diu_ops.diu_size);
> +
> +	diu_ops.diu_mem = __alloc_bootmem(diu_ops.diu_size, 8, 0);
> +	if (!diu_ops.diu_mem) {
> +		printk(KERN_ERR "fsl-diu: cannot allocate %lu bytes\n",
> +			diu_ops.diu_size);
> +		return -ENOMEM;
> +	}
> +
> +	printk(KERN_INFO "%s: diu_mem=%p\n", __func__, diu_ops.diu_mem);

The pr_debug line is more useful information than the KERN_INFO line...

-Scott
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