linux-kernel - Re: [RFC 3/6] clocksource: tcb_clksrc: use atmel

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Message-ID: <20150326115451.GB16148@samfundet.no>
Date:	Thu, 26 Mar 2015 12:54:51 +0100
From:	Hans-Christian Egtvedt <egtvedt@...fundet.no>
To:	Ben Dooks <ben.dooks@...ethink.co.uk>
Cc:	linux-kernel@...ts.codethink.co.uk, hskinnemoen@...il.com,
	linux@...im.org.za, nicolas.ferre@...el.com,
	linux-arm-kernel@...ts.infradead.org,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
Subject: Re: [RFC 3/6] clocksource: tcb_clksrc: use atmel_io.h to provide
 on-chip IO

Around Thu 26 Mar 2015 11:45:51 +0000 or thereabout, Ben Dooks wrote:
> Use <linux/atmel_io.h> to provide IO accessors which work on both
> AVR32 and ARM for on-chip peripherals.
> 
> Signed-off-by: Ben Dooks <ben.dooks@...ethink.co.uk>

Acked-by: Hans-Christian Egtvedt <egtvedt@...fundet.no>

> --
> CC: Daniel Lezcano <daniel.lezcano@...aro.org>
> CC: Thomas Gleixner <tglx@...utronix.de>
> CC: Linux Kernel <linux-kernel@...r.kernel.org>
> CC: Linux ARM Kernel <linux-arm-kernel@...ts.infradead.org>
> CC: Andrew Victor <linux@...im.org.za>
> CC: Nicolas Ferre <nicolas.ferre@...el.com>
> CC: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
> ---
>  drivers/clocksource/tcb_clksrc.c | 10 +++-------
>  1 file changed, 3 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c
> index 0f819dd3..b25416d 100644
> --- a/drivers/clocksource/tcb_clksrc.c
> +++ b/drivers/clocksource/tcb_clksrc.c
> @@ -9,6 +9,7 @@
>  #include <linux/ioport.h>
>  #include <linux/io.h>
>  #include <linux/platform_device.h>
> +#include <linux/atmel_io.h>
>  #include <linux/atmel_tc.h>
>  
>  
> @@ -41,13 +42,8 @@
>  
>  static void __iomem *tcaddr;
>  
> -#ifdef CONFIG_AVR32
> -#define tcb_readl	__raw_readl
> -#define tcb_writel	__raw_writel
> -#else
> -#define tcb_readl	readl_relaxed
> -#define tcb_writel	writel_relaxed
> -#endif
> +#define tcb_readl	atmel_oc_readl
> +#define tcb_writel	atmel_oc_writel

A note here is that we could replace these defines completely, and use the
atmel_oc_{read,write}{l,w} directly in the driver. That would be a nice
follow-up to this patch, first replace the defines to use the common
accessor, then replace the defines all together.

<snipp>

-- 
mvh
Hans-Christian Egtvedt
--
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