linux-kernel - Re: [RFC PATCH 05/15] tty: serial: samsung: fixup accessors for endian

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Message-ID: <71328b3d-dc2f-3eb9-b664-4d621db23131@codethink.co.uk>
Date:	Fri, 10 Jun 2016 11:13:00 +0100
From:	Ben Dooks <ben.dooks@...ethink.co.uk>
To:	Matthew Leach <matthew@...tleach.net>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.com>, linux-serial@...r.kernel.org
Subject: Re: [RFC PATCH 05/15] tty: serial: samsung: fixup accessors for
 endian

On 08/06/16 19:31, Matthew Leach wrote:
> Fix the serial access code to deal with kernels built for big endian
> operation.
> 
> Signed-off-by: Matthew Leach <matthew@...tleach.net>
> ---
> CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> CC: Jiri Slaby <jslaby@...e.com>
> CC: linux-serial@...r.kernel.org
> CC: linux-kernel@...r.kernel.org
> ---
>  drivers/tty/serial/samsung.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/tty/serial/samsung.h b/drivers/tty/serial/samsung.h
> index fc5deaa..8818bdd 100644
> --- a/drivers/tty/serial/samsung.h
> +++ b/drivers/tty/serial/samsung.h
> @@ -118,9 +118,9 @@ struct s3c24xx_uart_port {
>  	((unsigned long *)(unsigned long)((port)->membase + (reg)))
>  
>  #define rd_regb(port, reg) (__raw_readb(portaddr(port, reg)))
> -#define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
> +#define rd_regl(port, reg) (readl_relaxed(portaddr(port, reg)))

For completeness we should have changed __raw_readb to readb_relaxed

>  #define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg))
> -#define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))
> +#define wr_regl(port, reg, val) writel_relaxed(val, portaddr(port, reg))

Acked-by: Ben Dooks <ben.dooks@...ethink.co.uk>

-- 
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius