linux-kernel - Re: [PATCH] i2c: designware: fix master is holding SCL low while ENABLE bit is disabled

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Message-ID: <tlyybm626om6a64du5ke4sbxqo4nx2p3g5g4f2mfhv5wp4pulw@5alrb7jixquw>
Date: Fri, 6 Sep 2024 23:34:39 +0200
From: Andi Shyti <andi.shyti@...nel.org>
To: Kimriver Liu <kimriver.liu@...ngine.com>
Cc: jarkko.nikula@...ux.intel.com, andriy.shevchenko@...ux.intel.com, 
	mika.westerberg@...ux.intel.com, jsd@...ihalf.com, linux-i2c@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: designware: fix master is holding SCL low while
 ENABLE bit is disabled

Hi Kimriver,

...

> diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c
> index e8a688d04aee..2b3398cd4382 100644
> --- a/drivers/i2c/busses/i2c-designware-common.c
> +++ b/drivers/i2c/busses/i2c-designware-common.c
> @@ -453,6 +453,17 @@ void __i2c_dw_disable(struct dw_i2c_dev *dev)
>  
>  	abort_needed = raw_intr_stats & DW_IC_INTR_MST_ON_HOLD;
>  	if (abort_needed) {
> +		if (!(enable & DW_IC_ENABLE_ENABLE)) {
> +			regmap_write(dev->map, DW_IC_ENABLE, DW_IC_ENABLE_ENABLE);

BTW, your patch doesn't compile. Please make sure that you have
everything in place and please resend.

This time I expect you to follow Andy's suggestion.

Thanks,
Andi