linux-kernel - Re: [PATCH v2 4/5] mfd: axp20x: AXP717: Add support for boost regulator

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Message-ID: <664e3f5e.050a0220.ae493.07d7@mx.google.com>
Date: Wed, 22 May 2024 13:54:21 -0500
From: Chris Morgan <macroalpha82@...il.com>
To: Andre Przywara <andre.przywara@....com>
Cc: Chen-Yu Tsai <wens@...e.org>, Lee Jones <lee@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-sunxi@...ts.linux.dev,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>,
	Ryan Walklin <ryan@...ttoast.com>
Subject: Re: [PATCH v2 4/5] mfd: axp20x: AXP717: Add support for boost
 regulator

On Thu, Apr 18, 2024 at 01:07:35AM +0100, Andre Przywara wrote:
> The AXP717 also contains a boost regulator, to provide the 5V USB VBUS
> rail when running on battery.
> 
> Add the registers to the MFD description to be able to use them from the
> regulator driver.
> 
> Signed-off-by: Andre Przywara <andre.przywara@....com>
> Reviewed-by: John Watts <contact@...kia.org>
> ---
>  drivers/mfd/axp20x.c       | 2 ++
>  include/linux/mfd/axp20x.h | 2 ++
>  2 files changed, 4 insertions(+)
> 
> diff --git a/drivers/mfd/axp20x.c b/drivers/mfd/axp20x.c
> index d8ad4e120d379..02513b1eff2e8 100644
> --- a/drivers/mfd/axp20x.c
> +++ b/drivers/mfd/axp20x.c
> @@ -209,6 +209,8 @@ static const struct regmap_access_table axp313a_volatile_table = {
>  };
>  
>  static const struct regmap_range axp717_writeable_ranges[] = {
> +	regmap_reg_range(AXP717_MODULE_EN_CONTROL, AXP717_MODULE_EN_CONTROL),
> +	regmap_reg_range(AXP717_BOOST_CONTROL, AXP717_BOOST_CONTROL),
>  	regmap_reg_range(AXP717_IRQ0_EN, AXP717_IRQ4_EN),
>  	regmap_reg_range(AXP717_IRQ0_STATE, AXP717_IRQ4_STATE),
>  	regmap_reg_range(AXP717_DCDC_OUTPUT_CONTROL, AXP717_CPUSLDO_CONTROL),
> diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h
> index 8c0a33a2e9ce2..4dad54fdf67ee 100644
> --- a/include/linux/mfd/axp20x.h
> +++ b/include/linux/mfd/axp20x.h
> @@ -115,6 +115,8 @@ enum axp20x_variants {
>  #define AXP313A_IRQ_STATE		0x21
>  
>  #define AXP717_ON_INDICATE		0x00
> +#define AXP717_MODULE_EN_CONTROL	0x19

Could we name this register something like "AXP717_MODULE_EN_CONTROL_2"?
We're going to need register 0x0b later for usb and battery, and that's
also marked as a control register (control_1 per the datasheet).

Thank you,
Chris

> +#define AXP717_BOOST_CONTROL		0x1e
>  #define AXP717_IRQ0_EN			0x40
>  #define AXP717_IRQ1_EN			0x41
>  #define AXP717_IRQ2_EN			0x42
> -- 
> 2.35.8
>