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Message-ID: <20230919195752.GA85007-robh@kernel.org>
Date: Tue, 19 Sep 2023 14:57:52 -0500
From: Rob Herring <robh@...nel.org>
To: Chen-Yu Tsai <wenst@...omium.org>
Cc: Lee Jones <lee@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Mark Brown <broonie@...nel.org>,
Zhiyong Tao <zhiyong.tao@...iatek.com>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v3 05/12] regulator: dt-bindings: mt6358: Add MT6366 PMIC
On Tue, Sep 19, 2023 at 06:43:48PM +0800, Chen-Yu Tsai wrote:
> From: Zhiyong Tao <zhiyong.tao@...iatek.com>
>
> The MediaTek MT6366 PMIC is similar to the MT6358 PMIC. It is designed
> to be paired with the MediaTek MT8186 SoC. It has 9 buck regulators and
> 29 LDO regulators, not counting ones that feed internally and basically
> have no controls. The regulators are named after their intended usage
> for the SoC and system design, thus not named generically as ldoX or
> dcdcX, but as vcn33 or vgpu.
>
> The differences compared to the MT6358 are minimal:
> - Regulators removed: VCAMA1, VCAMA2, VCAMD, VCAMIO, VLDO28
> - Regulators added: VM18, VMDDR, VSRAM_CORE
>
> Add a binding document describing all the regulators and their supplies.
>
> Signed-off-by: Zhiyong Tao <zhiyong.tao@...iatek.com>
> [wens@...omium.org: major rework and added commit message]
> Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
> ---
> Changes since v2:
> - Merged all the propertyPatterns together; the if-then sections now
> only block out invalid properties
>
> Changes since v1:
> - Replaced underscores in supply names to hyphens
> - Merged with MT6358 regulator binding
> - Added MT6358 fallback compatible to MT6366 regulator
>
> Changes since Zhiyong's last version (v4) [1]:
> - simplified regulator names
> - added descriptions to regulators
> - removed bogus regulators (*_sshub)
> - merged vcn33-wifi and vcn33-bt as vcn33
> - added missing regulators (vm18, vmddr, vsram-core)
> - cut down examples to a handful of cases and made them complete
> - expanded commit message a lot
>
> [1] https://lore.kernel.org/linux-arm-kernel/20220823123745.14061-1-zhiyong.tao@mediatek.com/
>
> .../regulator/mediatek,mt6358-regulator.yaml | 120 +++++++++++++++---
> 1 file changed, 104 insertions(+), 16 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/regulator/mediatek,mt6358-regulator.yaml b/Documentation/devicetree/bindings/regulator/mediatek,mt6358-regulator.yaml
> index c5f336318ec2..05e381899d08 100644
> --- a/Documentation/devicetree/bindings/regulator/mediatek,mt6358-regulator.yaml
> +++ b/Documentation/devicetree/bindings/regulator/mediatek,mt6358-regulator.yaml
> @@ -16,14 +16,18 @@ description:
>
> properties:
> compatible:
> - const: mediatek,mt6358-regulator
> + oneOf:
> + - const: mediatek,mt6358-regulator
> + - items:
> + - const: mediatek,mt6366-regulator
> + - const: mediatek,mt6358-regulator
Would the mt6366 regulator driver(s) function with the mt6358 driver
unchanged? If not, then not really much point in having the fallback.
>
> vsys-ldo1-supply:
> description: Supply for LDOs vfe28, vxo22, vcn28, vaux18, vaud28, vsim1, vusb, vbif28
> vsys-ldo2-supply:
> - description: Supply for LDOs vldo28, vio28, vmc, vmch, vsim2
> + description: Supply for LDOs vldo28 (MT6358 only), vio28, vmc, vmch, vsim2
> vsys-ldo3-supply:
> - description: Supply for LDOs vcn33, vcama1, vcama2, vemc, vibr
> + description: Supply for LDOs vcn33, vcama[12] (MT6358 only), vemc, vibr
> vsys-vcore-supply:
> description: Supply for buck regulator vcore
> vsys-vdram1-supply:
> @@ -43,18 +47,20 @@ properties:
> vsys-vs2-supply:
> description: Supply for buck regulator vs2
> vs1-ldo1-supply:
> - description: Supply for LDOs vrf18, vefuse, vcn18, vcamio, vio18
> + description:
> + Supply for LDOs vrf18, vefuse, vcn18, vcamio (MT6358 only), vio18, vm18 (MT6366 only)
> vs2-ldo1-supply:
> - description: Supply for LDOs vdram2
> + description: Supply for LDOs vdram2, vmddr (MT6366 only)
> vs2-ldo2-supply:
> description: Supply for LDOs vrf12, va12
> vs2-ldo3-supply:
> - description: Supply for LDOs vsram-gpu, vsram-others, vsram-proc11, vsram-proc12
> + description:
> + Supply for LDOs vsram-core (MT6366 only), vsram-gpu, vsram-others, vsram-proc11, vsram-proc12
> vs2-ldo4-supply:
> description: Supply for LDO vcamd
>
> patternProperties:
> - "^buck_v(core|dram1|gpu|modem|pa|proc1[12]|s[12])$":
> + "^(buck_)?v(core|dram1|gpu|modem|pa|proc1[12]|s[12])$":
> description: Buck regulators
> type: object
> $ref: regulator.yaml#
> @@ -69,7 +75,7 @@ patternProperties:
> enum: [0, 1]
> unevaluatedProperties: false
>
> - "^ldo_v(a|rf)12$":
> + "^(ldo_)?v(a|rf)12$":
> description: LDOs with fixed 1.2V output and 0~100/10mV tuning
> type: object
> $ref: regulator.yaml#
> @@ -77,15 +83,16 @@ patternProperties:
> regulator-allowed-modes: false
> unevaluatedProperties: false
>
> - "^ldo_v((aux|cn|io|rf)18|camio)$":
> - description: LDOs with fixed 1.8V output and 0~100/10mV tuning
> + "^(ldo_)?v((aux|cn|io|rf)18|camio)$":
> + description:
> + LDOs with fixed 1.8V output and 0~100/10mV tuning (vcn18 on MT6366 has variable output)
> type: object
> $ref: regulator.yaml#
> properties:
> regulator-allowed-modes: false
> unevaluatedProperties: false
>
> - "^ldo_vxo22$":
> + "^(ldo_)?vxo22$":
> description: LDOs with fixed 2.2V output and 0~100/10mV tuning
> type: object
> $ref: regulator.yaml#
> @@ -93,7 +100,7 @@ patternProperties:
> regulator-allowed-modes: false
> unevaluatedProperties: false
>
> - "^ldo_v(aud|bif|cn|fe|io)28$":
> + "^(ldo_)?v(aud|bif|cn|fe|io)28$":
> description: LDOs with fixed 2.8V output and 0~100/10mV tuning
> type: object
> $ref: regulator.yaml#
> @@ -101,7 +108,7 @@ patternProperties:
> regulator-allowed-modes: false
> unevaluatedProperties: false
>
> - "^ldo_vusb$":
> + "^(ldo_)?vusb$":
> description: LDOs with fixed 3.0V output and 0~100/10mV tuning
> type: object
> $ref: regulator.yaml#
> @@ -109,7 +116,7 @@ patternProperties:
> regulator-allowed-modes: false
> unevaluatedProperties: false
>
> - "^ldo_vsram_(gpu|others|proc1[12])$":
> + "^(ldo_)?vsram[_-](core|gpu|others|proc1[12])$":
> description: LDOs with variable output
> type: object
> $ref: regulator.yaml#
> @@ -117,7 +124,7 @@ patternProperties:
> regulator-allowed-modes: false
> unevaluatedProperties: false
>
> - "^ldo_v(cama[12]|camd|cn33|dram2|efuse|emc|ibr|ldo28|mc|mch|sim[12])$":
> + "^(ldo_)?v(cama[12]|camd|cn33|dram2|efuse|emc|ibr|ldo28|m18|mc|mch|mddr|sim[12])$":
> description: LDOs with variable output and 0~100/10mV tuning
> type: object
> $ref: regulator.yaml#
> @@ -130,11 +137,50 @@ required:
>
> additionalProperties: false
>
> +allOf:
> + - if:
> + properties:
> + compatible:
> + const: mediatek,mt6358-regulator
> + then:
> + patternProperties:
> + # Old regulator node name scheme (with prefix and underscores) only
> + # ([^y-] is used to avoid matching -supply
> + "^(?<!buck_)(?<!ldo_)v.*[^y-](?!-supply)$": false
> + "^ldo_vsram-": false
> + # vsram_core regulator doesn't exist on MT6358
> + "^ldo_vsram[-_]core$": false
> +
> + properties:
> + # vm18 and vmddr regulators don't exist on MT6358
> + ldo_vm18: false
> + ldo_vmddr: false
> +
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: mediatek,mt6366-regulator
> + then:
> + patternProperties:
> + # Prefer cleaned up regulator node names
> + "^(buck|ldo)_": false
> + # Don't allow underscores
> + "^vsram_": false
> + # vcam* regulators don't exist on MT6366
> + "^vcam": false
> +
> + properties:
> + # vldo28 regulator doesn't exist on MT6366
> + vldo28: false
> + # vs2_ldo4 supply pin doesn't exist on MT6366
> + vs2-ldo4-supply: false
> +
> examples:
> - |
> #include <dt-bindings/regulator/mediatek,mt6397-regulator.h>
>
> - regulator {
> + mt6358-regulator {
regulator or regulators is preferred.
> compatible = "mediatek,mt6358-regulator";
>
> buck_vgpu {
> @@ -156,4 +202,46 @@ examples:
> };
> };
>
> + mt6366-regulator {
> + compatible = "mediatek,mt6366-regulator", "mediatek,mt6358-regulator";
> +
> + vdram1 {
> + regulator-name = "pp1125_emi_vdd2";
> + regulator-min-microvolt = <1125000>;
> + regulator-max-microvolt = <1125000>;
> + regulator-ramp-delay = <12500>;
> + regulator-enable-ramp-delay = <0>;
> + regulator-allowed-modes = <MT6397_BUCK_MODE_AUTO
> + MT6397_BUCK_MODE_FORCE_PWM>;
> + regulator-always-on;
> + };
> +
> + vproc11 {
> + regulator-name = "ppvar_dvdd_proc_bc_mt6366";
> + regulator-min-microvolt = <600000>;
> + regulator-max-microvolt = <1200000>;
> + regulator-ramp-delay = <6250>;
> + regulator-enable-ramp-delay = <200>;
> + regulator-allowed-modes = <MT6397_BUCK_MODE_AUTO
> + MT6397_BUCK_MODE_FORCE_PWM>;
> + regulator-always-on;
> + };
> +
> + vmddr {
> + regulator-name = "pm0750_emi_vmddr";
> + regulator-min-microvolt = <700000>;
> + regulator-max-microvolt = <750000>;
> + regulator-enable-ramp-delay = <325>;
> + regulator-always-on;
> + };
> +
> + vsram-proc11 {
> + regulator-name = "pp0900_dvdd_sram_bc";
> + regulator-min-microvolt = <850000>;
> + regulator-max-microvolt = <1120000>;
> + regulator-ramp-delay = <6250>;
> + regulator-enable-ramp-delay = <240>;
> + regulator-always-on;
> + };
> + };
> ...
> --
> 2.42.0.459.ge4e396fd5e-goog
>
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