From nobody Wed Dec 17 10:43:33 2025 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 9996F2900BE for ; Fri, 9 May 2025 12:25:06 +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=1746793507; cv=none; b=dzJdBGCmVqCVZvd91NZXtFs9sJ/HB1IRDTzx6Y7juDvjJDQk5XFzMUzciM0z4har4V3PR+OPRLjKSnc/jQ+TK5CfyY6Dsl32NXdBmPV48YMRxke77IrI813MiZvWUMBC+NEnwFXegURuyiIqvNF50DvQRs9dMdnQM/FNXzaksvI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746793507; c=relaxed/simple; bh=RMw7g4/SU9cO0pK7UMO3xQvgqzcugLhcbfNZwcAQsyw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pHZ7VIrca1AJrjE0pCzF61/68PXeP3coLeFlLglt7WobhPZcPNGoJNm3OvZkULVeofloKBuNRB8dWaqdNJuMjMnmyr9cVpam6MjGNUx6W2V5v28QcTcZ71lVPfadd9chkDdZEt3DKz2x/FzDaWj+x4baM5QL2kPWk5naaLi5fnU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ejE+Bw2g; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ejE+Bw2g" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5132CC4CEF0; Fri, 9 May 2025 12:25:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746793506; bh=RMw7g4/SU9cO0pK7UMO3xQvgqzcugLhcbfNZwcAQsyw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ejE+Bw2g7kYUOibE/82DsluAfFH4MF4zSofN9+xNe25lLkNo6Y9zpiGMcvlgcBUYf s2pRz+NbDVlDIVPZfF8s4kiEZeaRYMXkSOFCfZf3jGpmGkJeicXhHQIvrQPfWRZnAV JnvcCD4CcvE3+ET3ZvtD7NawCo4OgP5jqncOFwY7M2GBZV8HYIRQJqCQL+DyTKir50 hxoo3bgKVpE3OWV4WiGQY1zu0aL21wK1thKIwY+T5pftMSJ4A2hjV2nUhcrVZKTc/J tHu2OZ6twjfWVJP3dsnkEFx5W21zsZzBJTxxSzRJyYA1pdfLuTo3D6wFaWdxdSuUEV yU5zOzGMGdoTQ== From: srini@kernel.org To: gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org, Hector Martin , Neal Gompa , Alyssa Rosenzweig , Sasha Finkelstein , Srinivas Kandagatla Subject: [PATCH 3/3] nvmem: Add apple-spmi-nvmem driver Date: Fri, 9 May 2025 13:24:52 +0100 Message-ID: <20250509122452.11827-4-srini@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250509122452.11827-1-srini@kernel.org> References: <20250509122452.11827-1-srini@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Hector Martin Add a driver for a series of SPMI-attached PMICs present on Apple devices Reviewed-by: Neal Gompa Reviewed-by: Alyssa Rosenzweig Signed-off-by: Hector Martin Co-developed-by: Sasha Finkelstein Signed-off-by: Sasha Finkelstein Signed-off-by: Srinivas Kandagatla --- MAINTAINERS | 1 + drivers/nvmem/Kconfig | 13 +++++++ drivers/nvmem/Makefile | 2 ++ drivers/nvmem/apple-spmi-nvmem.c | 62 ++++++++++++++++++++++++++++++++ 4 files changed, 78 insertions(+) create mode 100644 drivers/nvmem/apple-spmi-nvmem.c diff --git a/MAINTAINERS b/MAINTAINERS index 9936fa9fe87c..65abe712170d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2298,6 +2298,7 @@ F: drivers/iommu/io-pgtable-dart.c F: drivers/irqchip/irq-apple-aic.c F: drivers/nvme/host/apple.c F: drivers/nvmem/apple-efuses.c +F: drivers/nvmem/apple-spmi-nvmem.c F: drivers/pinctrl/pinctrl-apple-gpio.c F: drivers/pwm/pwm-apple.c F: drivers/soc/apple/* diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index 8671b7c974b9..ae4afbd8293c 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -40,6 +40,19 @@ config NVMEM_APPLE_EFUSES This driver can also be built as a module. If so, the module will be called nvmem-apple-efuses. =20 +config NVMEM_APPLE_SPMI + tristate "Apple SPMI NVMEM" + depends on ARCH_APPLE || COMPILE_TEST + depends on SPMI + select REGMAP_SPMI + help + Say y here to build a driver to expose NVMEM cells for a set of power + and RTC-related settings on a SPMI-attached PMIC present on Apple + devices, such as Apple Silicon Macs. + + This driver can also be built as a module. If so, the module + will be called apple-nvmem-spmi. + config NVMEM_BCM_OCOTP tristate "Broadcom On-Chip OTP Controller support" depends on ARCH_BCM_IPROC || COMPILE_TEST diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index 5b77bbb6488b..89a3c252c2c8 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -12,6 +12,8 @@ obj-y +=3D layouts/ # Devices obj-$(CONFIG_NVMEM_APPLE_EFUSES) +=3D nvmem-apple-efuses.o nvmem-apple-efuses-y :=3D apple-efuses.o +obj-$(CONFIG_NVMEM_APPLE_SPMI) +=3D apple_nvmem_spmi.o +apple_nvmem_spmi-y :=3D apple-spmi-nvmem.o obj-$(CONFIG_NVMEM_BCM_OCOTP) +=3D nvmem-bcm-ocotp.o nvmem-bcm-ocotp-y :=3D bcm-ocotp.o obj-$(CONFIG_NVMEM_BRCM_NVRAM) +=3D nvmem_brcm_nvram.o diff --git a/drivers/nvmem/apple-spmi-nvmem.c b/drivers/nvmem/apple-spmi-nv= mem.c new file mode 100644 index 000000000000..88614005d5ce --- /dev/null +++ b/drivers/nvmem/apple-spmi-nvmem.c @@ -0,0 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0-only OR MIT +/* + * Apple SPMI NVMEM driver + * + * Copyright The Asahi Linux Contributors + */ + +#include +#include +#include +#include +#include +#include + +static const struct regmap_config apple_spmi_regmap_config =3D { + .reg_bits =3D 16, + .val_bits =3D 8, + .max_register =3D 0xffff, +}; + +static int apple_spmi_nvmem_probe(struct spmi_device *sdev) +{ + struct regmap *regmap; + struct nvmem_config nvmem_cfg =3D { + .dev =3D &sdev->dev, + .name =3D "spmi_nvmem", + .id =3D NVMEM_DEVID_AUTO, + .word_size =3D 1, + .stride =3D 1, + .size =3D 0xffff, + .reg_read =3D (void *)regmap_bulk_read, + .reg_write =3D (void *)regmap_bulk_write, + }; + + regmap =3D devm_regmap_init_spmi_ext(sdev, &apple_spmi_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + nvmem_cfg.priv =3D regmap; + + return PTR_ERR_OR_ZERO(devm_nvmem_register(&sdev->dev, &nvmem_cfg)); +} + +static const struct of_device_id apple_spmi_nvmem_id_table[] =3D { + { .compatible =3D "apple,spmi-nvmem" }, + { }, +}; +MODULE_DEVICE_TABLE(of, apple_spmi_nvmem_id_table); + +static struct spmi_driver apple_spmi_nvmem_driver =3D { + .probe =3D apple_spmi_nvmem_probe, + .driver =3D { + .name =3D "apple-spmi-nvmem", + .of_match_table =3D apple_spmi_nvmem_id_table, + }, +}; + +module_spmi_driver(apple_spmi_nvmem_driver); + +MODULE_LICENSE("Dual MIT/GPL"); +MODULE_AUTHOR("Hector Martin "); +MODULE_DESCRIPTION("Apple SPMI NVMEM driver"); --=20 2.43.0