linux-kernel - Re: [PATCH 2/3] i2c: at91: print hardware version

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Message-ID: <20150601092322.GJ25118@odux.rfo.atmel.com>
Date:	Mon, 1 Jun 2015 11:23:22 +0200
From:	Ludovic Desroches <ludovic.desroches@...el.com>
To:	Cyrille Pitchen <cyrille.pitchen@...el.com>
CC:	<ludovic.desroches@...el.com>, <nicolas.ferre@...el.com>,
	<linux-i2c@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/3] i2c: at91: print hardware version

On Fri, May 29, 2015 at 03:50:09PM +0200, Cyrille Pitchen wrote:
> The probe() function now prints the hardware version of the I2C controller
> 
> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...el.com>
Acked-by: Ludovic Desroches <ludovic.desroches@...el.com>

> ---
>  drivers/i2c/busses/i2c-at91.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
> index b48be58..1549b29 100644
> --- a/drivers/i2c/busses/i2c-at91.c
> +++ b/drivers/i2c/busses/i2c-at91.c
> @@ -85,6 +85,8 @@
>  #define	AT91_TWI_ACR_DATAL(len)	((len) & 0xff)
>  #define	AT91_TWI_ACR_DIR	(1 << 8)
>  
> +#define	AT91_TWI_VER		0x00fc	/* Version Register */
> +
>  struct at91_twi_pdata {
>  	unsigned clk_max_div;
>  	unsigned clk_offset;
> @@ -867,6 +869,8 @@ static int at91_twi_probe(struct platform_device *pdev)
>  			return rc;
>  	}
>  
> +	dev_info(dev->dev, "version: 0x%x\n", at91_twi_read(dev, AT91_TWI_VER));
> +
>  	rc = of_property_read_u32(dev->dev->of_node, "clock-frequency",
>  			&bus_clk_rate);
>  	if (rc)
> -- 
> 1.8.2.2
> 
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