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

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Date:   Fri, 13 Jan 2017 14:01:56 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Christian Mauderer <oss@...auderer.de>
Cc:     Chen-Yu Tsai <wens@...e.org>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mfd: axp20x: Add AXP288 volatile registers.

On Wed, 11 Jan 2017, Christian Mauderer wrote:

> 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(+)

Applied, thanks.

> 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 = {

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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