linux-kernel - Re: [PATCH 24/25] MIPS: Alchemy: use the OHCI platform driver

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Date:	Wed, 3 Oct 2012 18:07:28 +0200
From:	Manuel Lauss <manuel.lauss@...il.com>
To:	Florian Fainelli <florian@...nwrt.org>
Cc:	stern@...land.harvard.edu, linux-usb@...r.kernel.org,
	Ralf Baechle <ralf@...ux-mips.org>,
	Manuel Lauss <manuel.lauss@...glemail.com>,
	Thomas Meyer <thomas@...3r.de>,
	"David S. Miller" <davem@...emloft.net>, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 24/25] MIPS: Alchemy: use the OHCI platform driver

On Wed, Oct 3, 2012 at 5:03 PM, Florian Fainelli <florian@...nwrt.org> wrote:
> This also greatly simplifies the power_{on,off} callbacks and make them
> work on platform device id instead of checking the OHCI controller base
> address like what was done in ohci-au1xxx.c.
>
> Signed-off-by: Florian Fainelli <florian@...nwrt.org>
> ---
>  arch/mips/alchemy/common/platform.c |   31 +++++++++++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
>
> diff --git a/arch/mips/alchemy/common/platform.c b/arch/mips/alchemy/common/platform.c
> index 57335a2..cd12458 100644
> --- a/arch/mips/alchemy/common/platform.c
> +++ b/arch/mips/alchemy/common/platform.c
> @@ -18,6 +18,7 @@
>  #include <linux/serial_8250.h>
>  #include <linux/slab.h>
>  #include <linux/usb/ehci_pdriver.h>
> +#include <linux/usb/ohci_pdriver.h>
>
>  #include <asm/mach-au1x00/au1000.h>
>  #include <asm/mach-au1x00/au1xxx_dbdma.h>
> @@ -142,6 +143,34 @@ static struct usb_ehci_pdata alchemy_ehci_pdata = {
>         .power_suspend          = alchemy_ehci_power_off,
>  };
>
> +/* Power on callback for the ohci platform driver */
> +static int alchemy_ohci_power_on(struct platform_device *pdev)
> +{
> +       int unit;
> +
> +       unit = (pdev->id == 1) ?
> +               ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0;
> +
> +       return alchemy_usb_control(unit, 1);
> +}
> +
> +/* Power off/suspend callback for the ohci platform driver */
> +static void alchemy_ohci_power_off(struct platform_device *pdev)
> +{
> +       int unit;
> +
> +       unit = (pdev->id == 1) ?
> +               ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0;
> +
> +       alchemy_usb_control(unit, 0);
> +}
> +
> +static struct usb_ohci_pdata alchemy_ohci_pdata = {
> +       .power_on               = alchemy_ohci_power_on,
> +       .power_off              = alchemy_ohci_power_off,
> +       .power_suspend          = alchemy_ohci_power_off,
> +};
> +
>  static unsigned long alchemy_ohci_data[][2] __initdata = {
>         [ALCHEMY_CPU_AU1000] = { AU1000_USB_OHCI_PHYS_ADDR, AU1000_USB_HOST_INT },
>         [ALCHEMY_CPU_AU1500] = { AU1000_USB_OHCI_PHYS_ADDR, AU1500_USB_HOST_INT },
> @@ -192,6 +221,7 @@ static void __init alchemy_setup_usb(int ctype)
>         pdev->name = "au1xxx-ohci";

Should be "ohci-platform" (2x).  With this change USB works on all my
Alchemy boards.
I'd also suggest to move drivers/usb/host/alchemy-common.c to
arch/mips/alchemy/common/usb.c.
(same for octeon2-common.c)

Manuel
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