linux-kernel - Re: [PATCH v3 2/3] davinci: vpss: dm365: set vpss clk ctrl

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Date:	Wed, 28 Nov 2012 22:18:04 +0200
From:	Sakari Ailus <sakari.ailus@....fi>
To:	Prabhakar Lad <prabhakar.csengg@...il.com>
Cc:	LMML <linux-media@...r.kernel.org>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	DLOS <davinci-linux-open-source@...ux.davincidsp.com>,
	Manjunath Hadli <manjunath.hadli@...com>,
	Prabhakar Lad <prabhakar.lad@...com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Hans Verkuil <hans.verkuil@...co.com>
Subject: Re: [PATCH v3 2/3] davinci: vpss: dm365: set vpss clk ctrl

Hi Prabhakar,

On Wed, Nov 28, 2012 at 04:25:33PM +0530, Prabhakar Lad wrote:
> From: Manjunath Hadli <manjunath.hadli@...com>
> 
> request_mem_region for VPSS_CLK_CTRL register and ioremap.
> and enable clocks appropriately.
> 
> Signed-off-by: Manjunath Hadli <manjunath.hadli@...com>
> Signed-off-by: Lad, Prabhakar <prabhakar.lad@...com>
> ---
>  drivers/media/platform/davinci/vpss.c |   14 ++++++++++++++
>  1 files changed, 14 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/media/platform/davinci/vpss.c b/drivers/media/platform/davinci/vpss.c
> index 34ad7bd..a36d694 100644
> --- a/drivers/media/platform/davinci/vpss.c
> +++ b/drivers/media/platform/davinci/vpss.c
> @@ -103,6 +103,7 @@ struct vpss_hw_ops {
>  struct vpss_oper_config {
>  	__iomem void *vpss_regs_base0;
>  	__iomem void *vpss_regs_base1;
> +	resource_size_t *vpss_regs_base2;
>  	enum vpss_platform_type platform;
>  	spinlock_t vpss_lock;
>  	struct vpss_hw_ops hw_ops;
> @@ -484,11 +485,24 @@ static struct platform_driver vpss_driver = {
>  
>  static void vpss_exit(void)
>  {
> +	iounmap(oper_cfg.vpss_regs_base2);
> +	release_mem_region(*oper_cfg.vpss_regs_base2, 4);

release_mem_region(VPSS_CLK_CTRL, 4);?

>  	platform_driver_unregister(&vpss_driver);
>  }
>  
> +#define VPSS_CLK_CTRL			0x01c40044
> +#define VPSS_CLK_CTRL_VENCCLKEN		BIT(3)
> +#define VPSS_CLK_CTRL_DACCLKEN		BIT(4)
> +
>  static int __init vpss_init(void)
>  {
> +	if (request_mem_region(VPSS_CLK_CTRL, 4, "vpss_clock_control")) {

if (!request_mem_region())
	return -EBUSY;

...

> +		oper_cfg.vpss_regs_base2 = ioremap(VPSS_CLK_CTRL, 4);
> +		__raw_writel(VPSS_CLK_CTRL_VENCCLKEN |
> +			     VPSS_CLK_CTRL_DACCLKEN, oper_cfg.vpss_regs_base2);
> +	} else {
> +		return -EBUSY;
> +	}
>  	return platform_driver_register(&vpss_driver);
>  }
>  subsys_initcall(vpss_init);

-- 
Sakari Ailus
e-mail: sakari.ailus@....fi	XMPP: sailus@...iisi.org.uk
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