linux-kernel - Re: [PATCH 12/16] pci/host: generic: convert to use generic config accesses

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Message-ID: <20150112175125.GM13360@arm.com>
Date:	Mon, 12 Jan 2015 17:51:25 +0000
From:	Will Deacon <will.deacon@....com>
To:	Rob Herring <robh@...nel.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 12/16] pci/host: generic: convert to use generic config
 accesses

On Sat, Jan 10, 2015 at 02:34:46AM +0000, Rob Herring wrote:
> Convert the generic host PCI driver to use the generic config access
> functions.
> 
> Signed-off-by: Rob Herring <robh@...nel.org>
> Cc: Will Deacon <will.deacon@....com>
> Cc: Bjorn Helgaas <bhelgaas@...gle.com>
> Cc: linux-pci@...r.kernel.org
> Cc: linux-arm-kernel@...ts.infradead.org
> ---
>  drivers/pci/host/pci-host-generic.c | 51 +++----------------------------------
>  1 file changed, 3 insertions(+), 48 deletions(-)

Looks like a fairly straightforward conversion for this driver!

  Acked-by: Will Deacon <will.deacon@....com>

Will

> diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c
> index 6eb1aa7..925e29e 100644
> --- a/drivers/pci/host/pci-host-generic.c
> +++ b/drivers/pci/host/pci-host-generic.c
> @@ -76,55 +76,9 @@ static struct gen_pci_cfg_bus_ops gen_pci_cfg_ecam_bus_ops = {
>  	.map_bus	= gen_pci_map_cfg_bus_ecam,
>  };
>  
> -static int gen_pci_config_read(struct pci_bus *bus, unsigned int devfn,
> -				int where, int size, u32 *val)
> -{
> -	void __iomem *addr;
> -	struct pci_sys_data *sys = bus->sysdata;
> -	struct gen_pci *pci = sys->private_data;
> -
> -	addr = pci->cfg.ops->map_bus(bus, devfn, where);
> -
> -	switch (size) {
> -	case 1:
> -		*val = readb(addr);
> -		break;
> -	case 2:
> -		*val = readw(addr);
> -		break;
> -	default:
> -		*val = readl(addr);
> -	}
> -
> -	return PCIBIOS_SUCCESSFUL;
> -}
> -
> -static int gen_pci_config_write(struct pci_bus *bus, unsigned int devfn,
> -				 int where, int size, u32 val)
> -{
> -	void __iomem *addr;
> -	struct pci_sys_data *sys = bus->sysdata;
> -	struct gen_pci *pci = sys->private_data;
> -
> -	addr = pci->cfg.ops->map_bus(bus, devfn, where);
> -
> -	switch (size) {
> -	case 1:
> -		writeb(val, addr);
> -		break;
> -	case 2:
> -		writew(val, addr);
> -		break;
> -	default:
> -		writel(val, addr);
> -	}
> -
> -	return PCIBIOS_SUCCESSFUL;
> -}
> -
>  static struct pci_ops gen_pci_ops = {
> -	.read	= gen_pci_config_read,
> -	.write	= gen_pci_config_write,
> +	.read	= pci_generic_config_read,
> +	.write	= pci_generic_config_write,
>  };
>  
>  static const struct of_device_id gen_pci_of_match[] = {
> @@ -287,6 +241,7 @@ static int gen_pci_probe(struct platform_device *pdev)
>  
>  	of_id = of_match_node(gen_pci_of_match, np);
>  	pci->cfg.ops = of_id->data;
> +	gen_pci_ops.map_bus = pci->cfg.ops->map_bus;
>  	pci->host.dev.parent = dev;
>  	INIT_LIST_HEAD(&pci->host.windows);
>  	INIT_LIST_HEAD(&pci->resources);
> -- 
> 2.1.0
> 
> 
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