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Fri, 7 Mar 2025 20:09:01 +0000 (UTC) From: Sasha Finkelstein via B4 Relay Date: Fri, 07 Mar 2025 21:08:59 +0100 Subject: [PATCH v2 1/3] dt-bindings: spmi: Add Apple SPMI controller Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250307-spmi-v2-1-eccdb06afb99@gmail.com> References: <20250307-spmi-v2-0-eccdb06afb99@gmail.com> In-Reply-To: <20250307-spmi-v2-0-eccdb06afb99@gmail.com> To: Sven Peter , Janne Grunau , Alyssa Rosenzweig , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Sasha Finkelstein X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1741378140; l=2380; i=fnkl.kernel@gmail.com; s=20241124; h=from:subject:message-id; bh=42A1Zt2nvcW4/B1VtjKrwbVfufeFdTVKin8on6KgoN8=; b=ZGFLsAhcZjp+II8lxt6aHhHoP4xpMbAQhaV8uZk9gbYv3wo+c8nfhcIFUIJeuQ1rZ+Dt84E/H EDyXTAvYYprAPJS6SnlHj0C/w8URuJksc4dgdwLGW7+2Rct5L8Tz+Nw X-Developer-Key: i=fnkl.kernel@gmail.com; a=ed25519; pk=aSkp1PdZ+eF4jpMO6oLvz/YfT5XkBUneWwyhQrOgmsU= X-Endpoint-Received: by B4 Relay for fnkl.kernel@gmail.com/20241124 with auth_id=283 X-Original-From: Sasha Finkelstein Reply-To: fnkl.kernel@gmail.com From: Sasha Finkelstein Add bindings for the SPMI controller present on most Apple SoCs Reviewed-by: Rob Herring (Arm) Signed-off-by: Sasha Finkelstein Reviewed-by: Sven Peter --- .../devicetree/bindings/spmi/apple,spmi.yaml | 49 ++++++++++++++++++= ++++ MAINTAINERS | 1 + 2 files changed, 50 insertions(+) diff --git a/Documentation/devicetree/bindings/spmi/apple,spmi.yaml b/Docum= entation/devicetree/bindings/spmi/apple,spmi.yaml new file mode 100644 index 0000000000000000000000000000000000000000..16bd7eb2b7af2c0b176f0e5b197= 0f4670af691da --- /dev/null +++ b/Documentation/devicetree/bindings/spmi/apple,spmi.yaml @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spmi/apple,spmi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple SPMI controller + +maintainers: + - Sasha Finkelstein + +description: A SPMI controller present on most Apple SoCs + +allOf: + - $ref: spmi.yaml# + +properties: + compatible: + items: + - enum: + - apple,t8103-spmi + - apple,t6000-spmi + - apple,t8112-spmi + - const: apple,spmi + + reg: + maxItems: 1 + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + #include + + spmi@920a1300 { + compatible =3D "apple,t6000-spmi", "apple,spmi"; + reg =3D <0x920a1300 0x100>; + #address-cells =3D <2>; + #size-cells =3D <0>; + + pmic@f { + reg =3D <0xf SPMI_USID>; + /* PMIC-specific properties */ + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 8e0736dc2ee0e33544fa373a4978b7dae18c040c..271ff8110df83c2d4fe7fbbfffc= 0a72259460bc5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2236,6 +2236,7 @@ F: Documentation/devicetree/bindings/pci/apple,pcie.y= aml F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml F: Documentation/devicetree/bindings/power/apple* F: Documentation/devicetree/bindings/pwm/apple,s5l-fpwm.yaml +F: Documentation/devicetree/bindings/spmi/apple,spmi.yaml F: Documentation/devicetree/bindings/watchdog/apple,wdt.yaml F: arch/arm64/boot/dts/apple/ F: drivers/bluetooth/hci_bcm4377.c --=20 2.48.1 From nobody Mon Feb 9 07:19:45 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0293E2561A3; 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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250307-spmi-v2-2-eccdb06afb99@gmail.com> References: <20250307-spmi-v2-0-eccdb06afb99@gmail.com> In-Reply-To: <20250307-spmi-v2-0-eccdb06afb99@gmail.com> To: Sven Peter , Janne Grunau , Alyssa Rosenzweig , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Sasha Finkelstein , Jean-Francois Bortolotti X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1741378140; l=7125; i=fnkl.kernel@gmail.com; s=20241124; h=from:subject:message-id; bh=ijXMaFCOmKcRdNz2Iu4Ta5HuPA6nUGhAm2fK832PyKc=; b=xy2/edX38GXnIw4DW8fIc0IaiRkHvkUzvB0TLB875jUkBWPFcSu8vKevksFyR57meRCse7SVH Y1+RMggGmzZAJCt3S5WdCfFF8L0bk190CoK6ho/RnHc5JWVU5U3Fdbk X-Developer-Key: i=fnkl.kernel@gmail.com; a=ed25519; pk=aSkp1PdZ+eF4jpMO6oLvz/YfT5XkBUneWwyhQrOgmsU= X-Endpoint-Received: by B4 Relay for fnkl.kernel@gmail.com/20241124 with auth_id=283 X-Original-From: Sasha Finkelstein Reply-To: fnkl.kernel@gmail.com From: Jean-Francois Bortolotti The connected PMU contains several useful nvmem cells such as RTC offset, boot failure counters, reboot/shutdown selector, and a few others. In addition M3+ machines have their USB-PD controller connected via SPMI. Signed-off-by: Jean-Francois Bortolotti Co-developed-by: Sasha Finkelstein Signed-off-by: Sasha Finkelstein Reviewed-by: Sven Peter --- MAINTAINERS | 1 + drivers/spmi/Kconfig | 8 ++ drivers/spmi/Makefile | 1 + drivers/spmi/spmi-apple-controller.c | 178 +++++++++++++++++++++++++++++++= ++++ 4 files changed, 188 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 271ff8110df83c2d4fe7fbbfffc0a72259460bc5..9006695261d29fbc1e15659c2b4= 3d7afeee0b656 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2254,6 +2254,7 @@ F: drivers/nvmem/apple-efuses.c F: drivers/pinctrl/pinctrl-apple-gpio.c F: drivers/pwm/pwm-apple.c F: drivers/soc/apple/* +F: drivers/spmi/spmi-apple-controller.c F: drivers/watchdog/apple_wdt.c F: include/dt-bindings/interrupt-controller/apple-aic.h F: include/dt-bindings/pinctrl/apple.h diff --git a/drivers/spmi/Kconfig b/drivers/spmi/Kconfig index 73780204631463631cabcbad5bf83e8dbbee94ce..9005fa91d9f4e541403ccc7bf84= e0592402ac41e 100644 --- a/drivers/spmi/Kconfig +++ b/drivers/spmi/Kconfig @@ -11,6 +11,14 @@ menuconfig SPMI =20 if SPMI =20 +config SPMI_APPLE + tristate "Apple SoC SPMI Controller platform driver" + depends on ARCH_APPLE || COMPILE_TEST + help + If you say yes to this option, support will be included for the + SPMI controller present on many Apple SoCs, including the + t8103 (M1) and t600x (M1 Pro/Max). + config SPMI_HISI3670 tristate "Hisilicon 3670 SPMI Controller" select IRQ_DOMAIN_HIERARCHY diff --git a/drivers/spmi/Makefile b/drivers/spmi/Makefile index 7f152167bb05b2c24a0f9669f60278152898eebb..38ac635645ba65aa46cb5e8a500= 72ed9771e229b 100644 --- a/drivers/spmi/Makefile +++ b/drivers/spmi/Makefile @@ -4,6 +4,7 @@ # obj-$(CONFIG_SPMI) +=3D spmi.o spmi-devres.o =20 +obj-$(CONFIG_SPMI_APPLE) +=3D spmi-apple-controller.o obj-$(CONFIG_SPMI_HISI3670) +=3D hisi-spmi-controller.o obj-$(CONFIG_SPMI_MSM_PMIC_ARB) +=3D spmi-pmic-arb.o obj-$(CONFIG_SPMI_MTK_PMIF) +=3D spmi-mtk-pmif.o diff --git a/drivers/spmi/spmi-apple-controller.c b/drivers/spmi/spmi-apple= -controller.c new file mode 100644 index 0000000000000000000000000000000000000000..2d4a677aaff6b10fce80f7eacc3= 30605674ea495 --- /dev/null +++ b/drivers/spmi/spmi-apple-controller.c @@ -0,0 +1,178 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Apple SoC SPMI device driver + * + * Copyright The Asahi Linux Contributors + * + * Inspired by: + * OpenBSD support Copyright (c) 2021 Mark Kettenis + * Correllium support Copyright (C) 2021 Corellium LLC + * hisi-spmi-controller.c + * spmi-pmic-arb.c Copyright (c) 2021, The Linux Foundation. + */ + +#include +#include +#include +#include +#include +#include + +/* SPMI Controller Registers */ +#define SPMI_STATUS_REG 0 +#define SPMI_CMD_REG 0x4 +#define SPMI_RSP_REG 0x8 + +#define SPMI_RX_FIFO_EMPTY BIT(24) + +#define REG_POLL_INTERVAL 10000 +#define REG_POLL_TIMEOUT (REG_POLL_INTERVAL * 5) + +struct apple_spmi { + void __iomem *regs; +}; + +#define poll_reg(spmi, reg, val, cond) \ + readl_poll_timeout((spmi)->regs + (reg), (val), (cond), \ + REG_POLL_INTERVAL, REG_POLL_TIMEOUT) + +static inline u32 read_reg(struct apple_spmi *spmi, int offset) +{ + return readl(spmi->regs + offset); +} + +static inline void write_reg(u32 value, struct apple_spmi *spmi, int offse= t) +{ + writel(value, spmi->regs + offset); +} + +static inline u32 apple_spmi_pack_cmd(u8 opc, u8 sid, u16 saddr, size_t le= n) +{ + return opc | sid << 8 | saddr << 16 | (len - 1) | (1 << 15); +} + +/* Wait for Rx FIFO to have something */ +static int apple_spmi_wait_rx_not_empty(struct spmi_controller *ctrl) +{ + struct apple_spmi *spmi =3D spmi_controller_get_drvdata(ctrl); + int ret; + u32 status; + + ret =3D poll_reg(spmi, SPMI_STATUS_REG, status, !(status & SPMI_RX_FIFO_E= MPTY)); + if (ret) { + dev_err(&ctrl->dev, + "%s: Failed to wait for RX FIFO not empty\n", __func__); + return ret; + } + + return 0; +} + +static int spmi_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, + u16 saddr, u8 *buf, size_t len) +{ + struct apple_spmi *spmi =3D spmi_controller_get_drvdata(ctrl); + u32 spmi_cmd =3D apple_spmi_pack_cmd(opc, sid, saddr, len); + u32 rsp; + size_t len_read =3D 0; + u8 i; + int ret; + + write_reg(spmi_cmd, spmi, SPMI_CMD_REG); + + ret =3D apple_spmi_wait_rx_not_empty(ctrl); + if (ret) + return ret; + + /* Discard SPMI reply status */ + read_reg(spmi, SPMI_RSP_REG); + + /* Read SPMI data reply */ + while (len_read < len) { + rsp =3D read_reg(spmi, SPMI_RSP_REG); + i =3D 0; + while ((len_read < len) && (i < 4)) { + buf[len_read++] =3D ((0xff << (8 * i)) & rsp) >> (8 * i); + i +=3D 1; + } + } + + return 0; +} + +static int spmi_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, + u16 saddr, const u8 *buf, size_t len) +{ + struct apple_spmi *spmi =3D spmi_controller_get_drvdata(ctrl); + u32 spmi_cmd =3D apple_spmi_pack_cmd(opc, sid, saddr, len); + size_t i =3D 0, j; + int ret; + + write_reg(spmi_cmd, spmi, SPMI_CMD_REG); + + while (i < len) { + j =3D 0; + spmi_cmd =3D 0; + while ((j < 4) & (i < len)) + spmi_cmd |=3D buf[i++] << (j++ * 8); + + write_reg(spmi_cmd, spmi, SPMI_CMD_REG); + } + + ret =3D apple_spmi_wait_rx_not_empty(ctrl); + if (ret) + return ret; + + /* Discard */ + read_reg(spmi, SPMI_RSP_REG); + + return 0; +} + +static int apple_spmi_probe(struct platform_device *pdev) +{ + struct apple_spmi *spmi; + struct spmi_controller *ctrl; + int ret; + + ctrl =3D devm_spmi_controller_alloc(&pdev->dev, sizeof(*spmi)); + if (IS_ERR(ctrl)) + return -ENOMEM; + + spmi =3D spmi_controller_get_drvdata(ctrl); + + spmi->regs =3D devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(spmi->regs)) + return PTR_ERR(spmi->regs); + + ctrl->dev.of_node =3D pdev->dev.of_node; + + ctrl->read_cmd =3D spmi_read_cmd; + ctrl->write_cmd =3D spmi_write_cmd; + + ret =3D devm_spmi_controller_add(&pdev->dev, ctrl); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "spmi_controller_add failed\n"); + + return 0; +} + +static const struct of_device_id apple_spmi_match_table[] =3D { + { .compatible =3D "apple,spmi", }, + {} +}; +MODULE_DEVICE_TABLE(of, apple_spmi_match_table); + +static struct platform_driver apple_spmi_driver =3D { + .probe =3D apple_spmi_probe, + .driver =3D { + .name =3D "apple-spmi", + .of_match_table =3D apple_spmi_match_table, + }, +}; +module_platform_driver(apple_spmi_driver); + +MODULE_AUTHOR("Jean-Francois Bortolotti "); +MODULE_DESCRIPTION("Apple SoC SPMI driver"); +MODULE_LICENSE("GPL"); --=20 2.48.1 From nobody Mon Feb 9 07:19:45 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A438F2405EC; Fri, 7 Mar 2025 20:09:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741378141; cv=none; b=o86wvkZ66LXppNN1sDXJmchc6vvepIT1OgCNfouVaG01BCNMRofDGh6Was2TVWmvdOKUbAt0xMmrtXWha42GOKnecePzK9BC1KqIW/pXt3fbqQIqHFHvCwJJXjLCcc+PbnkKfszjnvgjPe9CP2d3Vi4cKdvPJ7zN+1cS3JmdmDg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741378141; c=relaxed/simple; bh=M8b67bSpkXpNwrWbVgdymEb+uCIjAyGK7SXteTWS2zk=; 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Fri, 7 Mar 2025 20:09:01 +0000 (UTC) From: Sasha Finkelstein via B4 Relay Date: Fri, 07 Mar 2025 21:09:01 +0100 Subject: [PATCH v2 3/3] arm64: dts: apple: Add SPMI controller nodes Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250307-spmi-v2-3-eccdb06afb99@gmail.com> References: <20250307-spmi-v2-0-eccdb06afb99@gmail.com> In-Reply-To: <20250307-spmi-v2-0-eccdb06afb99@gmail.com> To: Sven Peter , Janne Grunau , Alyssa Rosenzweig , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Sasha Finkelstein , Nick Chan X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1741378140; l=2656; i=fnkl.kernel@gmail.com; s=20241124; h=from:subject:message-id; bh=vAy3qAJvENlWfH+6RnDDlx2HQlH2MYFllFghIMOrbEU=; b=MClImYe6YJJM14dS7aEJlgncn9cez8m0s5vjVl604WH60T+4pOqVUAgjY5+lfzVcMvNK9C2Aw q5cItAiy1W2AJB7A6XeKCJRtrzrjD6SOIUqko8dXi/Z8Du9mlH82qiT X-Developer-Key: i=fnkl.kernel@gmail.com; a=ed25519; pk=aSkp1PdZ+eF4jpMO6oLvz/YfT5XkBUneWwyhQrOgmsU= X-Endpoint-Received: by B4 Relay for fnkl.kernel@gmail.com/20241124 with auth_id=283 X-Original-From: Sasha Finkelstein Reply-To: fnkl.kernel@gmail.com From: Sasha Finkelstein Add device tree entries for the SPMI controller Reviewed-by: Nick Chan Signed-off-by: Sasha Finkelstein --- arch/arm64/boot/dts/apple/t600x-die0.dtsi | 7 +++++++ arch/arm64/boot/dts/apple/t8103.dtsi | 8 ++++++++ arch/arm64/boot/dts/apple/t8112.dtsi | 7 +++++++ 3 files changed, 22 insertions(+) diff --git a/arch/arm64/boot/dts/apple/t600x-die0.dtsi b/arch/arm64/boot/dt= s/apple/t600x-die0.dtsi index b1c875e692c8fb9c0af46a23568a7b0cd720141b..d544a35c8af414c583d38b040e1= aa753902f1c93 100644 --- a/arch/arm64/boot/dts/apple/t600x-die0.dtsi +++ b/arch/arm64/boot/dts/apple/t600x-die0.dtsi @@ -53,6 +53,13 @@ wdt: watchdog@2922b0000 { interrupts =3D ; }; =20 + nub_spmi0: spmi@2920a1300 { + compatible =3D "apple,t6000-spmi", "apple,spmi"; + reg =3D <0x2 0x920a1300 0x0 0x100>; + #address-cells =3D <2>; + #size-cells =3D <0>; + }; + sio_dart_0: iommu@39b004000 { compatible =3D "apple,t6000-dart"; reg =3D <0x3 0x9b004000 0x0 0x4000>; diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/app= le/t8103.dtsi index 9b0dad6b618444ac6b1c9735c50cccfc3965f947..0f03dc808cf7c6b7d71afc79dd2= 9d368f957f979 100644 --- a/arch/arm64/boot/dts/apple/t8103.dtsi +++ b/arch/arm64/boot/dts/apple/t8103.dtsi @@ -11,6 +11,7 @@ #include #include #include +#include =20 / { compatible =3D "apple,t8103", "apple,arm-platform"; @@ -604,6 +605,13 @@ pcie_pins: pcie-pins { }; }; =20 + nub_spmi: spmi@23d0d9300 { + compatible =3D "apple,t8103-spmi", "apple,spmi"; + reg =3D <0x2 0x3d0d9300 0x0 0x100>; + #address-cells =3D <2>; + #size-cells =3D <0>; + }; + pinctrl_nub: pinctrl@23d1f0000 { compatible =3D "apple,t8103-pinctrl", "apple,pinctrl"; reg =3D <0x2 0x3d1f0000 0x0 0x4000>; diff --git a/arch/arm64/boot/dts/apple/t8112.dtsi b/arch/arm64/boot/dts/app= le/t8112.dtsi index 1666e6ab250bc0be9b8318e3c8fc903ccd3f3760..fecf70eba255c668757e2edfe25= a4e9e7c0d0bad 100644 --- a/arch/arm64/boot/dts/apple/t8112.dtsi +++ b/arch/arm64/boot/dts/apple/t8112.dtsi @@ -641,6 +641,13 @@ pcie_pins: pcie-pins { }; }; =20 + nub_spmi: spmi@23d714000 { + compatible =3D "apple,t8112-spmi", "apple,spmi"; + reg =3D <0x2 0x3d714000 0x0 0x100>; + #address-cells =3D <2>; + #size-cells =3D <0>; + }; + pinctrl_nub: pinctrl@23d1f0000 { compatible =3D "apple,t8112-pinctrl", "apple,pinctrl"; reg =3D <0x2 0x3d1f0000 0x0 0x4000>; --=20 2.48.1