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

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Message-Id: <20200105012416.23296-2-samuel@sholland.org>
Date:   Sat,  4 Jan 2020 19:24:08 -0600
From:   Samuel Holland <samuel@...lland.org>
To:     Chen-Yu Tsai <wens@...e.org>, 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>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com, Samuel Holland <samuel@...lland.org>,
        stable@...r.kernel.org
Subject: [PATCH v2 1/9] mfd: axp20x: Mark AXP20X_VBUS_IPSOUT_MGMT as volatile

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(-)

diff --git a/drivers/mfd/axp20x.c b/drivers/mfd/axp20x.c
index a4aaadaa0cb0..aa59496e4376 100644
--- a/drivers/mfd/axp20x.c
+++ b/drivers/mfd/axp20x.c
@@ -126,7 +126,7 @@ static const struct regmap_range axp288_writeable_ranges[] = {
 static const struct regmap_range axp288_volatile_ranges[] = {
 	regmap_reg_range(AXP20X_PWR_INPUT_STATUS, AXP288_POWER_REASON),
 	regmap_reg_range(AXP288_BC_GLOBAL, AXP288_BC_GLOBAL),
-	regmap_reg_range(AXP288_BC_DET_STAT, AXP288_BC_DET_STAT),
+	regmap_reg_range(AXP288_BC_DET_STAT, AXP20X_VBUS_IPSOUT_MGMT),
 	regmap_reg_range(AXP20X_CHRG_BAK_CTRL, AXP20X_CHRG_BAK_CTRL),
 	regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IPSOUT_V_HIGH_L),
 	regmap_reg_range(AXP20X_TIMER_CTRL, AXP20X_TIMER_CTRL),
-- 
2.23.0