linux-kernel - Re: [PATCH v3 4/6] i2c: npcm: Modify the client address assignment

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Message-ID: <ZuQU2iIZwW4mAumo@smile.fi.intel.com>
Date: Fri, 13 Sep 2024 13:32:58 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: warp5tw@...il.com
Cc: avifishman70@...il.com, tmaimon77@...il.com, tali.perry1@...il.com,
	venture@...gle.com, yuenn@...gle.com, benjaminfair@...gle.com,
	andi.shyti@...nel.org, wsa@...nel.org, rand.sec96@...il.com,
	wsa+renesas@...g-engineering.com, tali.perry@...oton.com,
	Avi.Fishman@...oton.com, tomer.maimon@...oton.com,
	KWLIU@...oton.com, JJLIU0@...oton.com, kfting@...oton.com,
	openbmc@...ts.ozlabs.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/6] i2c: npcm: Modify the client address assignment

On Fri, Sep 13, 2024 at 06:14:44PM +0800, warp5tw@...il.com wrote:
> From: Tyrone Ting <kfting@...oton.com>
> 
> Store the client address earlier since it might get called in
> the i2c_recover_bus logic flow at the early stage of the function
> npcm_i2c_master_xfer.

We refer to the functions as func().

...

> +	/*
> +	 * Previously, the address was stored w/o left-shift by one bit and
> +	 * with that shift in the following call to npcm_i2c_master_start_xmit.
> +	 *
> +	 * Since there are cases that the i2c_recover_bus gets called at the
> +	 * early stage of the function npcm_i2c_master_xfer, the address is

Ditto.

> +	 * stored with the shift and used in the i2c_recover_bus call.
> +	 *
> +	 * The address is stored from bit 1 to bit 7 in the register for
> +	 * sending the i2c address later so it's left-shifted by 1 bit.
> +	 */


-- 
With Best Regards,
Andy Shevchenko