linux-kernel - Re: [PATCH v5 1/2] i2c: cadence: Handle

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Date:	Tue, 13 Jan 2015 12:28:54 +0100
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Harini Katakam <harinik@...inx.com>
Cc:	mark.rutland@....com, michal.simek@...inx.com,
	soren.brinkmann@...inx.com, linux-arm-kernel@...ts.infradead.org,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	harinikatakamlinux@...il.com
Subject: Re: [PATCH v5 1/2] i2c: cadence: Handle > 252 byte transfers

On Fri, Dec 12, 2014 at 09:48:26AM +0530, Harini Katakam wrote:
> The I2C controller sends a NACK to the slave when transfer size register
> reaches zero, irrespective of the hold bit. So, in order to handle transfers
> greater than 252 bytes, the transfer size register has to be maintained at a
> value >= 1. This patch implements the same.
> The interrupt status is cleared at the beginning of the isr instead of
> the end, to avoid missing any interrupts.
> 
> Signed-off-by: Harini Katakam <harinik@...inx.com>

Applied to for-next, thanks!

> @@ -333,10 +359,11 @@ static void cdns_i2c_mrecv(struct cdns_i2c *id)
>  	 * receive if it is less than transfer size and transfer size if
>  	 * it is more. Enable the interrupts.
>  	 */
> -	if (id->recv_count > CDNS_I2C_TRANSFER_SIZE)
> +	if (id->recv_count > CDNS_I2C_TRANSFER_SIZE) {
>  		cdns_i2c_writereg(CDNS_I2C_TRANSFER_SIZE,
>  				  CDNS_I2C_XFER_SIZE_OFFSET);
> -	else
> +		id->curr_recv_count = CDNS_I2C_TRANSFER_SIZE;
> +	} else
>  		cdns_i2c_writereg(id->recv_count, CDNS_I2C_XFER_SIZE_OFFSET);

else branch must have braces, too! I fixed that.


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