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bh=Y+Si40H9xvWW0NrdR4yM4VReyGwc5L82H6rUoRcB3Vo=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=M/h0/K21t75bfCjSagqoaN9u2XSZqYSbEy70L436keqQWryiGVdPYjsjbLXRwGvZf VC90WXIu3Bm3uso5B93l26rY5zZwFrTO1v921zmpbWeC3l47G2NvVu/xY56PvyS9XU yNFiMpYz/YG9LSS1ERcA45gmce2bGgiXht4tTqtiRR29YB1j1HRua7wtDuewwmQBsG lppH3qiqwJRhgRTLZH/yFZlk2z8+Kr1N3TSHWTZq4wiUbOhjoIr7071oe2NUWSaLXc C3zgx8HyZBveGhx5JV6zYWv/RSdmaq5omFoVmT5xUTOJFFeDsaigob8Cyj03KnMvGU OAIiabjk7zNOA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7C6A2C282EC; Wed, 5 Mar 2025 20:26:45 +0000 (UTC) From: Sasha Finkelstein via B4 Relay Date: Wed, 05 Mar 2025 21:26:40 +0100 Subject: [PATCH 2/3] spmi: add a spmi driver for Apple SoC MIME-Version: 1.0 Message-Id: <20250305-spmi-v1-2-c98f561fa99f@gmail.com> References: <20250305-spmi-v1-0-c98f561fa99f@gmail.com> In-Reply-To: <20250305-spmi-v1-0-c98f561fa99f@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=1741206403; l=7051; i=fnkl.kernel@gmail.com; s=20241124; h=from:subject:message-id; bh=rJ1vd9Iyd4gHu+jjWDpOWXoACMXfatLFKEyKY06WpWo=; b=sSgqnZA+YPk4BKHtpSDkTabZcZg+dilCxAqkFglzGcLhilQ5/ZrxlYTTgPef7EKr1Ko7H8G5Y ZQDIr7nhEIaCA0NdE7t0PICYTMqVX0CpiNN0Lj33U4x61h6317TNz6w 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250305_202649_910637_BBFED0E3 X-CRM114-Status: GOOD ( 19.42 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: fnkl.kernel@gmail.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Jean-Francois Bortolotti Signed-off-by: Jean-Francois Bortolotti Co-developed-by: Sasha Finkelstein Signed-off-by: Sasha Finkelstein --- MAINTAINERS | 1 + drivers/spmi/Kconfig | 8 ++ drivers/spmi/Makefile | 1 + drivers/spmi/spmi-apple-controller.c | 176 +++++++++++++++++++++++++++++++++++ 4 files changed, 186 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 271ff8110df83c2d4fe7fbbfffc0a72259460bc5..9006695261d29fbc1e15659c2b43d7afeee0b656 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..9005fa91d9f4e541403ccc7bf84e0592402ac41e 100644 --- a/drivers/spmi/Kconfig +++ b/drivers/spmi/Kconfig @@ -11,6 +11,14 @@ menuconfig SPMI if SPMI +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..38ac635645ba65aa46cb5e8a50072ed9771e229b 100644 --- a/drivers/spmi/Makefile +++ b/drivers/spmi/Makefile @@ -4,6 +4,7 @@ # obj-$(CONFIG_SPMI) += spmi.o spmi-devres.o +obj-$(CONFIG_SPMI_APPLE) += spmi-apple-controller.o obj-$(CONFIG_SPMI_HISI3670) += hisi-spmi-controller.o obj-$(CONFIG_SPMI_MSM_PMIC_ARB) += spmi-pmic-arb.o obj-$(CONFIG_SPMI_MTK_PMIF) += 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..194fa5dd7c2c6fc4ecfbee0db7930b0c73b02550 --- /dev/null +++ b/drivers/spmi/spmi-apple-controller.c @@ -0,0 +1,176 @@ +// 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-ard.c Copyright (c) 2021, The Linux Foundation. + */ + +#include +#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_relaxed_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_relaxed(spmi->regs + offset); +} + +static inline void write_reg(u32 value, struct apple_spmi *spmi, int offset) +{ + writel_relaxed(value, spmi->regs + offset); +} + +static int spmi_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, + u16 saddr, u8 *__buf, size_t bc) +{ + struct apple_spmi *spmi = spmi_controller_get_drvdata(ctrl); + u32 spmi_cmd = opc | sid << 8 | saddr << 16 | (bc - 1) | (1 << 15); + u32 rsp; + u32 status; + size_t len_to_read = 0; + u8 i; + int ret; + + write_reg(spmi_cmd, spmi, SPMI_CMD_REG); + + /* Wait for Rx FIFO to have something */ + ret = poll_reg(spmi, SPMI_STATUS_REG, status, !(status & SPMI_RX_FIFO_EMPTY)); + if (ret) { + dev_err(&ctrl->dev, + "%s:Failed to wait for RX FIFO not empty\n", __func__); + return ret; + } + + /* Discard SPMI reply status */ + read_reg(spmi, SPMI_RSP_REG); + + /* Read SPMI data reply */ + while (len_to_read < bc) { + rsp = read_reg(spmi, SPMI_RSP_REG); + i = 0; + while ((len_to_read < bc) && (i < 4)) { + __buf[len_to_read++] = ((0xff << (8 * i)) & rsp) >> + (8 * i); + i += 1; + } + } + + return 0; +} + +static int spmi_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, + u16 saddr, const u8 *__buf, size_t bc) +{ + struct apple_spmi *spmi = spmi_controller_get_drvdata(ctrl); + u32 spmi_cmd = opc | sid << 8 | saddr << 16 | (bc - 1) | (1 << 15); + u32 status; + size_t i = 0, j; + int ret; + + write_reg(spmi_cmd, spmi, SPMI_CMD_REG); + + while (i < bc) { + j = 0; + spmi_cmd = 0; + while ((j < 4) & (i < bc)) + spmi_cmd |= __buf[i++] << (j++ * 8); + + write_reg(spmi_cmd, spmi, SPMI_CMD_REG); + } + + /* Wait for Rx FIFO to have something */ + ret = poll_reg(spmi, SPMI_STATUS_REG, status, !(status & SPMI_RX_FIFO_EMPTY)); + if (ret) { + dev_err(&ctrl->dev, + "%s:Failed to wait for RX FIFO not empty\n", __func__); + return ret; + } + + /* Discard */ + read_reg(spmi, SPMI_RSP_REG); + + return 0; +} + +static int spmi_controller_probe(struct platform_device *pdev) +{ + struct apple_spmi *spmi; + struct spmi_controller *ctrl; + int ret; + + ctrl = devm_spmi_controller_alloc(&pdev->dev, sizeof(*spmi)); + if (IS_ERR(ctrl)) { + dev_err_probe(&pdev->dev, PTR_ERR(ctrl), + "Can't allocate spmi_controller data\n"); + return -ENOMEM; + } + + spmi = spmi_controller_get_drvdata(ctrl); + + spmi->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(spmi->regs)) { + dev_err_probe(&pdev->dev, PTR_ERR(spmi->regs), + "Can't get ioremap regs\n"); + return PTR_ERR(spmi->regs); + } + + ctrl->dev.of_node = of_node_get(pdev->dev.of_node); + + ctrl->read_cmd = spmi_read_cmd; + ctrl->write_cmd = spmi_write_cmd; + + ret = devm_spmi_controller_add(&pdev->dev, ctrl); + if (ret) { + dev_err(&pdev->dev, + "spmi_controller_add failed with error %d!\n", ret); + return ret; + } + + return 0; +} + +static const struct of_device_id spmi_controller_match_table[] = { + { .compatible = "apple,spmi", }, + {} +}; +MODULE_DEVICE_TABLE(of, spmi_controller_match_table); + +static struct platform_driver spmi_controller_driver = { + .probe = spmi_controller_probe, + .driver = { + .name = "apple-spmi", + .of_match_table = spmi_controller_match_table, + }, +}; +module_platform_driver(spmi_controller_driver); + +MODULE_AUTHOR("Jean-Francois Bortolotti "); +MODULE_DESCRIPTION("Apple SoC SPMI driver"); +MODULE_LICENSE("GPL");