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Date: Mon, 7 Dec 2020 11:58:09 -0600
From: Rob Herring <robh@...nel.org>
To: Adam Ward <Adam.Ward.opensource@...semi.com>
Cc: Mark Brown <broonie@...nel.org>,
Liam Girdwood <lgirdwood@...il.com>,
Vincent Whitchurch <vincent.whitchurch@...s.com>,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
Support Opensource <support.opensource@...semi.com>
Subject: Re: [PATCH V4 01/10] regulator: Update DA9121 dt-bindings
On Tue, Dec 01, 2020 at 01:52:27PM +0000, Adam Ward wrote:
> Update bindings for the Dialog Semiconductor DA9121 voltage regulator to
> add device variants.
> Because several variants have multiple regulators, and to regard potential
> to add GPIO support in future, the 'regulators' sub-node is added,
> following the precedent set by other multi-regulator devices, including
> the DA9211 family. This breaks compatibility with the original submission
> by Vincent Whitchurch - but as this is still in for-next, the alignment
> could be made before upstreaming occurs.
>
> Signed-off-by: Adam Ward <Adam.Ward.opensource@...semi.com>
> ---
> .../devicetree/bindings/regulator/dlg,da9121.yaml | 164 +++++++++++++++++++--
> MAINTAINERS | 2 +
> .../dt-bindings/regulator/dlg,da9121-regulator.h | 22 +++
> 3 files changed, 177 insertions(+), 11 deletions(-)
> create mode 100644 include/dt-bindings/regulator/dlg,da9121-regulator.h
>
> diff --git a/Documentation/devicetree/bindings/regulator/dlg,da9121.yaml b/Documentation/devicetree/bindings/regulator/dlg,da9121.yaml
> index 2ece46e..6f2164f 100644
> --- a/Documentation/devicetree/bindings/regulator/dlg,da9121.yaml
> +++ b/Documentation/devicetree/bindings/regulator/dlg,da9121.yaml
> @@ -7,41 +7,183 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
> title: Dialog Semiconductor DA9121 voltage regulator
>
> maintainers:
> - - Vincent Whitchurch <vincent.whitchurch@...s.com>
> + - Adam Ward <Adam.Ward.opensource@...semi.com>
> +
> +description: |
> + Dialog Semiconductor DA9121 Single-channel 10A double-phase buck converter
> + Dialog Semiconductor DA9122 Double-channel 5A single-phase buck converter
> + Dialog Semiconductor DA9220 Double-channel 3A single-phase buck converter
> + Dialog Semiconductor DA9217 Single-channel 6A double-phase buck converter
> + Dialog Semiconductor DA9130 Single-channel 10A double-phase buck converter
> + Dialog Semiconductor DA9131 Double-channel 5A single-phase buck converter
> + Dialog Semiconductor DA9132 Double-channel 3A single-phase buck converter
> +
> + Current limits
> +
> + This is PER PHASE, and the current limit setting in the devices reflect
> + that with a maximum 10A limit. Allowing for transients at/near double
> + the rated current, this translates across the device range to per
> + channel figures as so...
> +
> + | DA9121 DA9122 DA9220 DA9217 DA9140
> + | /DA9130 /DA9131 /DA9132
> + -----------------------------------------------------------------------------
> + Output current / channel | 10000000 5000000 3000000 6000000 40000000
> + Output current / phase | 5000000 5000000 3000000 3000000 9500000
> + -----------------------------------------------------------------------------
> + Min regulator-min-microvolt| 300000 300000 300000 300000 500000
> + Max regulator-max-microvolt| 1900000 1900000 1900000 1900000 1000000
> + Device hardware default | 1000000 1000000 1000000 1000000 1000000
> + -----------------------------------------------------------------------------
> + Min regulator-min-microamp | 7000000 3500000 3500000 7000000 26000000
> + Max regulator-max-microamp | 20000000 10000000 6000000 12000000 78000000
> + Device hardware default | 15000000 7500000 5500000 11000000 58000000
>
> properties:
> + $nodename:
> + pattern: "pmic@[0-9a-f]{1,2}"
> compatible:
> - const: dlg,da9121
> + enum:
> + - dlg,da9121
> + - dlg,da9122
> + - dlg,da9220
> + - dlg,da9217
> + - dlg,da9130
> + - dlg,da9131
> + - dlg,da9132
> + - dlg,da9140
>
> reg:
> maxItems: 1
> + description: Specifies the I2C slave address.
> +
> + interrupts:
> + maxItems: 1
> + description: IRQ line information.
> +
> + dlg,irq-polling-delay-passive-ms:
> + $ref: "/schemas/types.yaml#/definitions/uint32"
Don't need a type with a standard unit suffix.
> + minimum: 1000
> + maximum: 10000
> + description: |
> + Specify the polling period, measured in milliseconds, between interrupt status
> + update checks. Range 1000-10000 ms.
>
> - buck1:
> - description:
> - Initial data for the Buck1 regulator.
> - $ref: "regulator.yaml#"
> + regulators:
> type: object
> + $ref: regulator.yaml#
'regulators' node is not a regulator, so this line should be dropped.
> + description: |
> + This node defines the settings for the BUCK. The content of the
> + sub-node is defined by the standard binding for regulators; see regulator.yaml.
> + The DA9121 regulator is bound using their names listed below
> + buck1 - BUCK1
> + buck2 - BUCK2 //DA9122, DA9220, DA9131, DA9132 only
>
> -additionalProperties: false
> + patternProperties:
> + "^buck([1-2])$":
> + type: object
> + $ref: regulator.yaml#
> +
> + properties:
> + regulator-mode:
> + maxItems: 1
> + description: Defined in include/dt-bindings/regulator/dlg,da9121-regulator.h
'regulator-mode' is defined as a property of a
'regulator-state-(standby|mem|disk)' child node. I don't see how you
would use this with 'regulator-initial-mode' either.
> +
> + regulator-initial-mode:
> + maxItems: 1
'maxItems' applies to arrays and this is not an array. What you should
have is constraints on the values:
enum: [ 0, 1, 2, 3 ]
> + description: Defined in include/dt-bindings/regulator/dlg,da9121-regulator.h
> +
> + enable-gpios:
> + maxItems: 1
> + description: Specify a valid GPIO for platform control of the regulator
> +
> + dlg,ripple-cancel:
> + $ref: "/schemas/types.yaml#/definitions/uint32"
> + description: |
> + Defined in include/dt-bindings/regulator/dlg,da9121-regulator.h
> + Only present on multi-channel devices (DA9122, DA9220, DA9131, DA9132)
enum: [ 0, 1, 2, 3 ]
> +
> + unevaluatedProperties: false
>
> required:
> - compatible
> - reg
> + - regulators
> +
> +additionalProperties: false
>
> examples:
> - |
> + #include <dt-bindings/gpio/gpio.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/regulator/dlg,da9121-regulator.h>
> i2c {
> #address-cells = <1>;
> #size-cells = <0>;
> - regulator@68 {
> + pmic@68 {
> compatible = "dlg,da9121";
> reg = <0x68>;
>
> - buck1 {
> - regulator-min-microvolt = <680000>;
> - regulator-max-microvolt = <820000>;
> + interrupt-parent = <&gpio6>;
> + interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
> +
> + dlg,irq-polling-delay-passive-ms = <2000>;
> +
> + regulators {
> + DA9121_BUCK1: buck1 {
> + regulator-name = "BUCK1";
> + regulator-min-microvolt = <300000>;
> + regulator-max-microvolt = <1900000>;
> + regulator-min-microamp = <7000000>;
> + regulator-max-microamp = <20000000>;
> + regulator-boot-on;
> + regulator-initial-mode = <DA9121_BUCK_MODE_AUTO>;
> + enable-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
> + };
> };
> };
> };
>
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/regulator/dlg,da9121-regulator.h>
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + pmic@68 {
> + compatible = "dlg,da9122";
> + reg = <0x68>;
> +
> + interrupt-parent = <&gpio6>;
> + interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
> +
> + dlg,irq-polling-delay-passive-ms = <2000>;
> +
> + regulators {
> + DA9122_BUCK1: buck1 {
> + regulator-name = "BUCK1";
> + regulator-min-microvolt = <300000>;
> + regulator-max-microvolt = <1900000>;
> + regulator-min-microamp = <3500000>;
> + regulator-max-microamp = <10000000>;
> + regulator-boot-on;
> + regulator-initial-mode = <DA9121_BUCK_MODE_AUTO>;
> + enable-gpios = <&gpio6 1 GPIO_ACTIVE_HIGH>;
> + dlg,ripple-cancel = <DA9121_BUCK_RIPPLE_CANCEL_NONE>;
> + };
> + DA9122_BUCK2: buck2 {
> + regulator-name = "BUCK2";
> + regulator-min-microvolt = <300000>;
> + regulator-max-microvolt = <1900000>;
> + regulator-min-microamp = <3500000>;
> + regulator-max-microamp = <10000000>;
> + regulator-boot-on;
> + regulator-initial-mode = <DA9121_BUCK_MODE_AUTO>;
> + enable-gpios = <&gpio6 2 GPIO_ACTIVE_HIGH>;
> + dlg,ripple-cancel = <DA9121_BUCK_RIPPLE_CANCEL_NONE>;
> + };
> + };
> + };
> + };
> ...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 9bff945..1e5b756 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -5118,6 +5118,7 @@ S: Supported
> W: http://www.dialog-semiconductor.com/products
> F: Documentation/devicetree/bindings/input/da90??-onkey.txt
> F: Documentation/devicetree/bindings/mfd/da90*.txt
> +F: Documentation/devicetree/bindings/regulator/dlg,da9*.yaml
> F: Documentation/devicetree/bindings/regulator/da92*.txt
> F: Documentation/devicetree/bindings/regulator/slg51000.txt
> F: Documentation/devicetree/bindings/sound/da[79]*.txt
> @@ -5142,6 +5143,7 @@ F: drivers/rtc/rtc-da90??.c
> F: drivers/thermal/da90??-thermal.c
> F: drivers/video/backlight/da90??_bl.c
> F: drivers/watchdog/da90??_wdt.c
> +F: include/dt-bindings/regulator/dlg,da9*-regulator.h
> F: include/linux/mfd/da903x.h
> F: include/linux/mfd/da9052/
> F: include/linux/mfd/da9055/
> diff --git a/include/dt-bindings/regulator/dlg,da9121-regulator.h b/include/dt-bindings/regulator/dlg,da9121-regulator.h
> new file mode 100644
> index 0000000..954edf6
> --- /dev/null
> +++ b/include/dt-bindings/regulator/dlg,da9121-regulator.h
> @@ -0,0 +1,22 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +
> +#ifndef _DT_BINDINGS_REGULATOR_DLG_DA9121_H
> +#define _DT_BINDINGS_REGULATOR_DLG_DA9121_H
> +
> +/*
> + * These buck mode constants may be used to specify values in device tree
> + * properties (e.g. regulator-initial-mode).
> + * A description of the following modes is in the manufacturers datasheet.
> + */
> +
> +#define DA9121_BUCK_MODE_FORCE_PFM 0
> +#define DA9121_BUCK_MODE_FORCE_PWM 1
> +#define DA9121_BUCK_MODE_FORCE_PWM_SHEDDING 2
> +#define DA9121_BUCK_MODE_AUTO 3
> +
> +#define DA9121_BUCK_RIPPLE_CANCEL_NONE 0
> +#define DA9121_BUCK_RIPPLE_CANCEL_SMALL 1
> +#define DA9121_BUCK_RIPPLE_CANCEL_MID 2
> +#define DA9121_BUCK_RIPPLE_CANCEL_LARGE 3
> +
> +#endif
> --
> 1.9.1
>
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