linux-kernel - Re: [PATCH 2/7] dw_dmac: fill optional encoded parameters in register structure

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Message-ID: <CAOh2x==Te7MBNrqX-wjaPzso_xTC44rUejMDhs7SW7HJag7j8g@mail.gmail.com>
Date:	Tue, 18 Sep 2012 12:09:01 +0530
From:	viresh kumar <viresh.kumar@...aro.org>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:	Vinod Koul <vinod.koul@...el.com>, spear-devel@...t.st.com,
	linux-kernel@...r.kernel.org, Hein Tibosch <hein_tibosch@...oo.es>
Subject: Re: [PATCH 2/7] dw_dmac: fill optional encoded parameters in register structure

On Mon, Sep 17, 2012 at 1:09 PM, Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
> diff --git a/drivers/dma/dw_dmac_regs.h b/drivers/dma/dw_dmac_regs.h
> index f6d92d7..4633d39 100644
> --- a/drivers/dma/dw_dmac_regs.h
> +++ b/drivers/dma/dw_dmac_regs.h
> @@ -82,9 +82,28 @@ struct dw_dma_regs {
>         DW_REG(ID);
>         DW_REG(TEST);
>
> +       /* reserved */
> +       DW_REG(__reserved0);
> +       DW_REG(__reserved1);
> +
>         /* optional encoded params, 0x3c8..0x3f7 */
> +       u32     __reserved;
> +
> +       /* per-channel configuration registers */
> +       u32     DWC_PARAMS[DW_DMA_MAX_NR_CHANNELS];
> +       u32     MULTI_BLK_TYPE;
> +       u32     MAX_BLK_SIZE;
> +
> +       /* top-level parameters */
> +       u32     DW_PARAMS;
>  };

Above is Ok.

> +#define dma_raw_readl(addr, name) \
> +       readl((addr) + offsetof(struct dw_dma_regs, name))
> +
> +#define dma_raw_writel(addr, name, val) \
> +       writel((val), (addr) + offsetof(struct dw_dma_regs, name))
> +

But why don't you use earlier defined readl/writel macros:
dma_readl and dma_writel?

--
viresh
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