linux-kernel - [PATCH] mfd: axp20x: Add AXP288 volatile registers.

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Date:   Wed, 11 Jan 2017 20:49:41 +0100
From:   Christian Mauderer <oss@...auderer.de>
To:     Lee Jones <lee.jones@...aro.org>, Chen-Yu Tsai <wens@...e.org>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Christian Mauderer <oss@...auderer.de>
Subject: [PATCH] mfd: axp20x: Add AXP288 volatile registers.

The axp288_fuelgauge driver and some other axp288_xxx are using a number
of the registers of the chip that are changed by hardware (for example
charge level). Because these registers are not marked as "volatile" in
the regmap, a cached version is used instead of the correct register
value. In case of the axp288_fuelgauge that leads to a battery level
that only changes on reboot. This patch adds the volatile registers of
the chip.

Signed-off-by: Christian Mauderer <oss@...auderer.de>
---
 drivers/mfd/axp20x.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mfd/axp20x.c b/drivers/mfd/axp20x.c
index ed918de84238..d74b3daca23f 100644
--- a/drivers/mfd/axp20x.c
+++ b/drivers/mfd/axp20x.c
@@ -118,7 +118,10 @@ static const struct regmap_range axp288_writeable_ranges[] = {
 };
 
 static const struct regmap_range axp288_volatile_ranges[] = {
+	regmap_reg_range(AXP20X_PWR_INPUT_STATUS, AXP20X_PWR_OP_MODE),
 	regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IPSOUT_V_HIGH_L),
+	regmap_reg_range(AXP20X_CC_CTRL, AXP288_FG_OCVL_REG),
+	regmap_reg_range(AXP288_FG_DES_CAP1_REG, AXP288_FG_CC_CAP_REG),
 };
 
 static const struct regmap_access_table axp288_writeable_table = {
-- 
2.11.0