linux-kernel - Re: [PATCH v2 1/9] mfd: axp20x: Mark AXP20X_VBUS_IPSOUT

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Message-ID: <20200106083603.GK22390@dell>
Date:   Mon, 6 Jan 2020 08:36:03 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Samuel Holland <samuel@...lland.org>
Cc:     Chen-Yu Tsai <wens@...e.org>, Sebastian Reichel <sre@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Oskari Lemmela <oskari@...mela.net>,
        Quentin Schulz <quentin.schulz@...tlin.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com, stable@...r.kernel.org
Subject: Re: [PATCH v2 1/9] mfd: axp20x: Mark AXP20X_VBUS_IPSOUT_MGMT as
 volatile

On Sat, 04 Jan 2020, Samuel Holland wrote:

> On AXP288 and newer PMICs, bit 7 of AXP20X_VBUS_IPSOUT_MGMT can be set
> to prevent using the VBUS input. However, when the VBUS unplugged and
> plugged back in, the bit automatically resets to zero.
> 
> We need to set the register as volatile to prevent regmap from caching
> that bit. Otherwise, regcache will think the bit is already set and not
> write the register.
> 
> Fixes: cd53216625a0 ("mfd: axp20x: Fix axp288 volatile ranges")
> Cc: stable@...r.kernel.org
> Signed-off-by: Samuel Holland <samuel@...lland.org>
> ---
>  drivers/mfd/axp20x.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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