linux-kernel - Re: [PATCH v5 3/3] of/pci: mips: convert to common of_pci_range

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Date:	Wed, 10 Apr 2013 13:28:34 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Andrew Murray <Andrew.Murray@....com>
CC:	rob.herring@...xeda.com, siva.kallam@...sung.com,
	linux-pci@...r.kernel.org, Liviu.Dudau@....com, paulus@...ba.org,
	linux-samsung-soc@...r.kernel.org, linux@....linux.org.uk,
	jg1.han@...sung.com, jgunthorpe@...idianresearch.com,
	devicetree-discuss@...ts.ozlabs.org, kgene.kim@...sung.com,
	bhelgaas@...gle.com, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, suren.reddy@...sung.com
Subject: Re: [PATCH v5 3/3] of/pci: mips: convert to common of_pci_range_parser

On 04/10/2013 02:29 AM, Andrew Murray wrote:
> This patch converts the pci_load_of_ranges function to use the new common
> of_pci_range_parser.
> 
> Signed-off-by: Andrew Murray <Andrew.Murray@....com>
> Signed-off-by: Liviu Dudau <Liviu.Dudau@....com>

Reviewed-by: Rob Herring <rob.herring@...xeda.com>


> ---
>  arch/mips/pci/pci.c |   50 ++++++++++++++++----------------------------------
>  1 files changed, 16 insertions(+), 34 deletions(-)
> 
> diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
> index 0872f12..bee49a4 100644
> --- a/arch/mips/pci/pci.c
> +++ b/arch/mips/pci/pci.c
> @@ -122,51 +122,33 @@ static void pcibios_scanbus(struct pci_controller *hose)
>  #ifdef CONFIG_OF
>  void pci_load_of_ranges(struct pci_controller *hose, struct device_node *node)
>  {
> -	const __be32 *ranges;
> -	int rlen;
> -	int pna = of_n_addr_cells(node);
> -	int np = pna + 5;
> +	struct of_pci_range_range range;
> +	struct of_pci_range_parser parser;
> +	u32 res_type;
>  
>  	pr_info("PCI host bridge %s ranges:\n", node->full_name);
> -	ranges = of_get_property(node, "ranges", &rlen);
> -	if (ranges == NULL)
> -		return;
>  	hose->of_node = node;
>  
> -	while ((rlen -= np * 4) >= 0) {
> -		u32 pci_space;
> +	if (of_pci_range_parser(&parser, node))
> +		return;
> +
> +	for_each_of_pci_range(&parser, &range) {
>  		struct resource *res = NULL;
> -		u64 addr, size;
> -
> -		pci_space = be32_to_cpup(&ranges[0]);
> -		addr = of_translate_address(node, ranges + 3);
> -		size = of_read_number(ranges + pna + 3, 2);
> -		ranges += np;
> -		switch ((pci_space >> 24) & 0x3) {
> -		case 1:		/* PCI IO space */
> +
> +		res_type = range.flags & IORESOURCE_TYPE_BITS;
> +		if (res_type == IORESOURCE_IO) {
>  			pr_info("  IO 0x%016llx..0x%016llx\n",
> -					addr, addr + size - 1);
> +				range.addr, range.addr + range.size - 1);
>  			hose->io_map_base =
> -				(unsigned long)ioremap(addr, size);
> +				(unsigned long)ioremap(range.addr, range.size);
>  			res = hose->io_resource;
> -			res->flags = IORESOURCE_IO;
> -			break;
> -		case 2:		/* PCI Memory space */
> -		case 3:		/* PCI 64 bits Memory space */
> +		} else if (res_type == IORESOURCE_MEM) {
>  			pr_info(" MEM 0x%016llx..0x%016llx\n",
> -					addr, addr + size - 1);
> +				range.addr, range.addr + range.size - 1);
>  			res = hose->mem_resource;
> -			res->flags = IORESOURCE_MEM;
> -			break;
> -		}
> -		if (res != NULL) {
> -			res->start = addr;
> -			res->name = node->full_name;
> -			res->end = res->start + size - 1;
> -			res->parent = NULL;
> -			res->sibling = NULL;
> -			res->child = NULL;
>  		}
> +		if (res != NULL)
> +			of_pci_range_to_resource(&range, node, res);
>  	}
>  }
>  #endif
> 

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