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From: Jon Hunter <jon-hunter-l0cyMroinI0@public.gmane.org>
To: Shubhrajyoti D <shubhrajyoti-l0cyMroinI0@public.gmane.org>
Cc: linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	khilman-l0cyMroinI0@public.gmane.org,
	ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org,
	linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	Richard Woodruff <r-woodruff2-l0cyMroinI0@public.gmane.org>
Subject: Re: [PATCHv7 2/3] OMAP: I2C: Remove the reset in the init path
Date: Fri, 2 Dec 2011 15:48:04 -0600	[thread overview]
Message-ID: <4ED94794.2000705@ti.com> (raw)
In-Reply-To: <4ED94536.2080307-l0cyMroinI0@public.gmane.org>

Hi Shubhrajyoti,

On 12/2/2011 15:37, Jon Hunter wrote:

[snip]
>> @@ -594,6 +545,11 @@ static int omap_i2c_xfer_msg(struct i2c_adapter
>> *adap,
>> return r;
>> if (r == 0) {
>> dev_err(dev->dev, "controller timed out\n");
>> + if (dev->device_reset) {
>> + r = dev->device_reset(dev->dev);
>> + if (r< 0)
>> + dev_err(dev->dev, "reset failed\n");
>> + }
>> omap_i2c_init(dev);
>
> Why put the reset here? The function omap_i2c_init is going to perform a
> soft reset. So why not replace the reset in that function?
>
> Furthermore does this work for omap1 devices? I think that you would
> need to remove the existing soft-reset from omap_i2c_init() into an omap1.

Sorry, I see you did remove the soft-reset in the omap_i2c_init(). 
However, why not just replace the reset in the omap_i2c_init() instead 
of moving it?

As for omap1, I see we don't perform a soft-reset so that is a don't care.

Cheers
Jon

WARNING: multiple messages have this Message-ID (diff)
From: jon-hunter@ti.com (Jon Hunter)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCHv7 2/3] OMAP: I2C: Remove the reset in the init path
Date: Fri, 2 Dec 2011 15:48:04 -0600	[thread overview]
Message-ID: <4ED94794.2000705@ti.com> (raw)
In-Reply-To: <4ED94536.2080307@ti.com>

Hi Shubhrajyoti,

On 12/2/2011 15:37, Jon Hunter wrote:

[snip]
>> @@ -594,6 +545,11 @@ static int omap_i2c_xfer_msg(struct i2c_adapter
>> *adap,
>> return r;
>> if (r == 0) {
>> dev_err(dev->dev, "controller timed out\n");
>> + if (dev->device_reset) {
>> + r = dev->device_reset(dev->dev);
>> + if (r< 0)
>> + dev_err(dev->dev, "reset failed\n");
>> + }
>> omap_i2c_init(dev);
>
> Why put the reset here? The function omap_i2c_init is going to perform a
> soft reset. So why not replace the reset in that function?
>
> Furthermore does this work for omap1 devices? I think that you would
> need to remove the existing soft-reset from omap_i2c_init() into an omap1.

Sorry, I see you did remove the soft-reset in the omap_i2c_init(). 
However, why not just replace the reset in the omap_i2c_init() instead 
of moving it?

As for omap1, I see we don't perform a soft-reset so that is a don't care.

Cheers
Jon

  parent reply	other threads:[~2011-12-02 21:48 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-02  9:21 [PATCHv7 0/3] I2C driver updates Shubhrajyoti D
2011-12-02  9:21 ` Shubhrajyoti D
2011-12-02  9:21 ` [PATCHv7 1/3] OMAP: I2C: Reset support Shubhrajyoti D
2011-12-02  9:21   ` Shubhrajyoti D
2011-12-09  1:15   ` Paul Walmsley
2011-12-09  1:15     ` Paul Walmsley
     [not found]     ` <alpine.DEB.2.00.1112081812530.6289-rwI8Ez+7Ko+d5PgPZx9QOdBPR1lH4CV8@public.gmane.org>
2011-12-09  7:21       ` Shubhrajyoti
2011-12-09  7:21         ` Shubhrajyoti
     [not found] ` <1322817674-25384-1-git-send-email-shubhrajyoti-l0cyMroinI0@public.gmane.org>
2011-12-02  9:21   ` [PATCHv7 2/3] OMAP: I2C: Remove the reset in the init path Shubhrajyoti D
2011-12-02  9:21     ` Shubhrajyoti D
2011-12-02 21:37     ` Jon Hunter
2011-12-02 21:37       ` Jon Hunter
     [not found]       ` <4ED94536.2080307-l0cyMroinI0@public.gmane.org>
2011-12-02 21:48         ` Jon Hunter [this message]
2011-12-02 21:48           ` Jon Hunter
2011-12-03 10:59         ` Shubhrajyoti
2011-12-03 10:59           ` Shubhrajyoti
2011-12-02  9:21   ` [PATCHv7 3/3] OMAP: I2C: Remove the SYSC register definition Shubhrajyoti D
2011-12-02  9:21     ` Shubhrajyoti D

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