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Date: Sun, 5 Jan 2020 18:07:25 +0800 From: Chen-Yu Tsai <wens@...e.org> To: Samuel Holland <samuel@...lland.org> Cc: Sebastian Reichel <sre@...nel.org>, Lee Jones <lee.jones@...aro.org>, Hans de Goede <hdegoede@...hat.com>, Oskari Lemmela <oskari@...mela.net>, Quentin Schulz <quentin.schulz@...tlin.com>, "open list:THERMAL" <linux-pm@...r.kernel.org>, linux-kernel <linux-kernel@...r.kernel.org>, linux-sunxi <linux-sunxi@...glegroups.com>, stable <stable@...r.kernel.org> Subject: Re: [PATCH v2 1/9] mfd: axp20x: Mark AXP20X_VBUS_IPSOUT_MGMT as volatile On Sun, Jan 5, 2020 at 9:24 AM Samuel Holland <samuel@...lland.org> 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> Reviewed-by: Chen-Yu Tsai <wens@...e.org>
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