linux-kernel - Re: [PATCH 3/5] mmc: host: omap_hsmmc: introduce new accessor functions

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Date:	Thu, 24 Apr 2014 20:47:38 +0530
From:	Balaji T K <balajitk@...com>
To:	Felipe Balbi <balbi@...com>
CC:	<chris@...ntf.net>, <ulf.hansson@...aro.org>,
	<linux-mmc@...r.kernel.org>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/5] mmc: host: omap_hsmmc: introduce new accessor functions

On Thursday 27 March 2014 05:34 AM, Felipe Balbi wrote:
> we introduce new accessors which provide for register
> access with and without offsets.
>
> This is just to make sure newer versions of the IP
> can access the new registers prepended at the beginning
> of the address space.
>
> Signed-off-by: Felipe Balbi <balbi@...com>
> ---
>   drivers/mmc/host/omap_hsmmc.c | 36 ++++++++++++++++++++++++++++++++++++
>   1 file changed, 36 insertions(+)
>
> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
> index d46f768..e596c6a 100644
> --- a/drivers/mmc/host/omap_hsmmc.c
> +++ b/drivers/mmc/host/omap_hsmmc.c
> @@ -211,6 +211,42 @@ struct omap_hsmmc_host {
>   	struct	omap_mmc_platform_data	*pdata;
>   };
>
> +static inline int _omap_hsmmc_read(struct omap_hsmmc_host *host,
> +		u32 reg, bool offset)
> +{
> +	return readl(host->base + reg + (offset ? host->reg_offset : 0));
> +}
> +
> +static inline void _omap_hsmmc_write(struct omap_hsmmc_host *host,
> +		u32 reg, u32 val, bool offset)
> +{
> +	writel(val, host->base + reg + (offset ? host->reg_offset : 0));
> +}
> +
> +static inline int omap_hsmmc_read_offset(struct omap_hsmmc_host *host,

I think you can rename this function as just omap_hsmmc_read
(removing _offset suffix)

> +		u32 reg)
> +{
> +	return _omap_hsmmc_read(host, reg, true);
> +}
> +
> +static inline void omap_hsmmc_write_offset(struct omap_hsmmc_host *host,

and this one as omap_hsmmc_write since this version of read/write is most often
used, the one with no_offset might be used less often.


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