linux-kernel - Re: [PATCH] i2c-designware: Mask interrupts during i2c controller enable

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Date:	Fri, 4 Apr 2014 21:16:13 +0300
From:	"Westerberg, Mika" <mika.westerberg@...el.com>
To:	"Du, Wenkai" <wenkai.du@...el.com>
Cc:	"linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
	Wolfram Sang <wsa@...-dreams.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] i2c-designware: Mask interrupts during i2c controller
 enable

On Fri, Apr 04, 2014 at 08:05:23PM +0300, Du, Wenkai wrote:
> diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c
> index 14c4b30..71a3fa9 100644
> --- a/drivers/i2c/busses/i2c-designware-core.c
> +++ b/drivers/i2c/busses/i2c-designware-core.c
> @@ -417,6 +417,9 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev)
>  	 */
>  	dw_writel(dev, msgs[dev->msg_write_idx].addr | ic_tar, DW_IC_TAR);
>  
> +	/* disable interrupts */
> +	i2c_dw_disable_int(dev);
> +

Please move this to i2c_dw_init() as I previously commented. This can only
happen once the controller comes out of reset (either boot, or resume from
system sleep).

>  	/* Enable the adapter */
>  	__i2c_dw_enable(dev, true);
>  
> -- 
> 1.7.9.5
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