linux-kernel - Re: [PATCH AUTOSEL 4.19 28/57] watchdog: lantiq: update register names to better match spec

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Date:   Mon, 5 Nov 2018 23:26:38 +0100
From:   Hauke Mehrtens <hauke@...ke-m.de>
To:     Sasha Levin <sashal@...nel.org>, stable@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>
Subject: Re: [PATCH AUTOSEL 4.19 28/57] watchdog: lantiq: update register
 names to better match spec

On 11/04/2018 02:51 PM, Sasha Levin wrote:
> From: Hauke Mehrtens <hauke@...ke-m.de>
> 
> [ Upstream commit 1f59f8aff98f200af7a6882184add7b85f5da741 ]
> 
> Some of the names of the bits were confusing to me.
> Now the bits share the same prefix as the register they are set on.
> 
> The LTQ_WDT_CR_PWL register (bits 26:25) is the pre warning limit and it
> does not turn anything on. It has 4 possible divers 1/2, 1/4, 1/8 and
> 1/16, this drivers only uses 1/16.
> The LTQ_WDT_CR_CLKDIV register bits(25:24) is only configuring a clock
> divers and do not turn any thing on too, all possible values are valid
> dividers.
> Using the LTQ_WDT_SR prefix is also wrong these bits are used in the
> LTQ_WDT_CR registers, SR is the status register which is read only.
> 
> This uses GENMASK where it is a mask and it uses shifts when a value is
> written to some bits.
> 
> Signed-off-by: Hauke Mehrtens <hauke@...ke-m.de>
> Reviewed-by: Guenter Roeck <linux@...ck-us.net>
> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
> Signed-off-by: Wim Van Sebroeck <wim@...ux-watchdog.org>
> Signed-off-by: Sasha Levin <sashal@...nel.org>
> ---
>  drivers/watchdog/lantiq_wdt.c | 36 ++++++++++++++++++-----------------
>  1 file changed, 19 insertions(+), 17 deletions(-)

This does not really fix a bug, I think it is not worth it to backport this.

Hauke



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