linux-kernel - Re: [PATCH] omap: i2c: don't check bus state IP rev3.3 and earlier

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Date:	Mon, 24 Nov 2014 13:08:10 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Alexander Kochetkov <al.kochet@...il.com>
Cc:	linux-omap@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org, Felipe Balbi <balbi@...com>,
	Wolfram Sang <wsa@...-dreams.de>,
	Kevin Hilman <khilman@...nel.org>
Subject: Re: [PATCH] omap: i2c: don't check bus state IP rev3.3 and earlier

* Alexander Kochetkov <al.kochet@...il.com> [141124 12:35]:
> Commit 903c3859f77f9b0aace551da03267ef7a211dbc4 ("i2c: omap: implement
> workaround for handling invalid BB-bit values") introduce the error result
> in boot test fault on OMAP3530 boards
> 
> The patch fix the error (disable i2c bus test for OMAP3530).

Maybe add Reported-by: credit for Kevin Hilman here?
Other than that, this fixes the problem for me:

Tested-by: Tony Lindgren <tony@...mide.com>
 
> Signed-off-by: Alexander Kochetkov <al.kochet@...il.com>
> Fixes: 903c3859f77f9b0aace551da03267ef7a211dbc4
> ---
>  drivers/i2c/busses/i2c-omap.c |    8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
> index 5d92d0e..4563200 100644
> --- a/drivers/i2c/busses/i2c-omap.c
> +++ b/drivers/i2c/busses/i2c-omap.c
> @@ -344,8 +344,10 @@ static int omap_i2c_reset(struct omap_i2c_dev *dev)
>  		/* SYSC register is cleared by the reset; rewrite it */
>  		omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG, sysc);
>  
> -		/* Schedule I2C-bus monitoring on the next transfer */
> -		dev->bb_valid = 0;
> +		if (dev->rev > OMAP_I2C_REV_ON_3430_3530) {
> +			/* Schedule I2C-bus monitoring on the next transfer */
> +			dev->bb_valid = 0;
> +		}
>  	}
>  
>  	return 0;
> @@ -460,7 +462,7 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
>  	dev->scllstate = scll;
>  	dev->sclhstate = sclh;
>  
> -	if (dev->rev < OMAP_I2C_OMAP1_REV_2) {
> +	if (dev->rev <= OMAP_I2C_REV_ON_3430_3530) {
>  		/* Not implemented */
>  		dev->bb_valid = 1;
>  	}
> -- 
> 1.7.9.5
> 
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