From patchwork Thu Feb 13 18:46:14 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Sverdlin X-Patchwork-Id: 13974027 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2A39BC021A6 for ; Thu, 13 Feb 2025 20:41:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=FDe0rDSPGDsZG133T1k0Mqn2/zzEFet+9ExLbsUPU14=; b=btFHFdVC4xoRAK 8zgX/kdyVE9djAAw+cIeaIc/AfczSSCGLq6zo6FD6RSugR8qEkyT6Db3Vfk2HD4vUh10GUcSgXTgk 7h1gggqKaYRRaV2qVU39gYpffS+o144tGPLJZ/GIT99ZMlXl6Cf15PqfsxX/3H1e7lrQbqoiNw9sk mO/9JdR9KLwLuBV8oTXTxiGOtC9QsCzMP8UICp1WbY52qD4CQubTH0LAEjNaRDQO9gftmY5IBKInn 5ry5/IfW6bOUbtSGq+E+pgQFuFEnz9f6Lotjq4S5HFLNOLxX7qhZWaLTBTwagU9bUsxnvJClWQ7jx VjCRrFxkrrl3hiK6ZiwA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tig1S-0000000CZT9-0i4T; Thu, 13 Feb 2025 20:41:22 +0000 Received: from mail-ed1-x536.google.com ([2a00:1450:4864:20::536]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tieEG-0000000CIEn-0tfq for linux-riscv@lists.infradead.org; Thu, 13 Feb 2025 18:46:29 +0000 Received: by mail-ed1-x536.google.com with SMTP id 4fb4d7f45d1cf-5dcdb56c9d3so1823129a12.0 for ; Thu, 13 Feb 2025 10:46:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1739472386; x=1740077186; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=h9v7NZsx7uvmI0y//U+H5k+9INR1KuR11hKVq6XpN7Q=; b=aAW4hcMHGd3flJCkLlLVM0R3HxINTpbMyhbwINxRwAhQP2yZmhZZv4jT8zLor71Wkt 6Qc7ZELySJDzGKColnCG27rD+9tDtzCloGUtoSGShL2BJyVYabFAl53CHxD3dkLjOCEm Q4NvzrgWEbpGhB5LEAigAr77XwDg+PNFehg5+QvT//etT4Fd9seSi5XMRRnhhbHlov31 ji61RuecPnpMjaJNwJAANAqqPPqhVdaO2JAoaibA2Vrq6jcRtLAWac2FnPYL6JR+wzRP bV8oFbWJ/0L67bOBhOe3khVeSQPHvPLWjkv1lAfIXKndnbzI3a9ILgG9S8Ih0ieMskDr Bwiw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739472386; x=1740077186; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=h9v7NZsx7uvmI0y//U+H5k+9INR1KuR11hKVq6XpN7Q=; b=Rzv+rchPk+58wK4W4BGwiEMmFp6DZxA4WAdL2j7nAK/xZxO5aSR+xAJiMPDESIuBM8 Qpc7b++dbU9qxkiggAgVBT1C2ROlwYgMxEbKEiISzc3+7hikUUWPW5cFp/G/ep7PyxGN +DQCcOC4j1vuAvLnQ0q38QekVGzUSMZ/3LxUjro61fOPjI0n75qjtzpoWNVmmQZokG4U Fmae5uyBSxJZXeU64+2zG1bl5zSM4/e5ZVrGmsuwZIFDV6TCf2wHW/UFfzIDDLxRG9gt 7oQ6cSXsB7XQpha3bnohKIwCVtj2Q+E0KXFrGZbi2gyUcv2Ih4Jx+Z/REcjbQUal0R1h /U/Q== X-Forwarded-Encrypted: i=1; AJvYcCXgdMSViBqZzoh0F2r7ma3iJ0r5QNtg6e3okU7f9PXLl6yZgwJMK5Pd/ynI8IcTK5Bf5TFPrqBVqHTIuQ==@lists.infradead.org X-Gm-Message-State: AOJu0YwpAJxNoNkRCVJxbwOxSQe+KztCFTo1vibRz9xcpyXQIwfou8+U AcJCm5MFmZkRxVeoUGHWbzYVhcmmyTKK0WvTDHF3ZgMgc3eSV9x6 X-Gm-Gg: ASbGnctGpWCmQFvtQXXiRNNGjn/yu/jX48pHugmtTqYZz7LFneA2797RFuUFK0fqxTz WcEg7Ths+d1QascW9qi56xGp5VIown0QLxQpFBVwpAoPfTo1VJLtoQ+/xeqjNnjAvBrWHcEANP9 fmCeZZsRh21iGuBAJW7jRah4KUw7JMWpiPqsog9ozwZoeuuJdPK7QY1VcKGyhQyK+60Ws/KtZwZ +cGK7XqzRnVq0hurvUhSAfW3b9w/xhdNfQ6i+P306IJ1bHq8BGjgzM6WRFqHm3FuMd7N/MZ+93S c0f47fQF0pxVQcOQZZQqsaZb3ZIT X-Google-Smtp-Source: AGHT+IFbOtRzeOCQ06GmMjbJRsv9zpsGZKNOgatw0C8hFYhEdBQ55E0H38YVmlbZVJyjoft+DGsobQ== X-Received: by 2002:a05:6402:5202:b0:5dc:ea7e:8c56 with SMTP id 4fb4d7f45d1cf-5dec9e99913mr9052563a12.22.1739472386351; Thu, 13 Feb 2025 10:46:26 -0800 (PST) Received: from giga-mm.. ([2a02:1210:861b:6f00:82ee:73ff:feb8:99e3]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aba533998e2sm181360466b.134.2025.02.13.10.46.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Feb 2025 10:46:26 -0800 (PST) From: Alexander Sverdlin To: devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-rtc@vger.kernel.org Cc: Jingbao Qiu , Inochi Amaoto , alexandre.belloni@bootlin.com, robh@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, unicorn_wang@outlook.com, inochiama@outlook.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, dlan@gentoo.org, linux-kernel@vger.kernel.org, Krzysztof Kozlowski , Alexander Sverdlin Subject: [PATCH v10 1/2] dt-bindings: rtc: sophgo: add RTC support for Sophgo CV1800 series SoC Date: Thu, 13 Feb 2025 19:46:14 +0100 Message-ID: <20250213184622.2099324-2-alexander.sverdlin@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250213184622.2099324-1-alexander.sverdlin@gmail.com> References: <20250213184622.2099324-1-alexander.sverdlin@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250213_104628_254531_FC875A28 X-CRM114-Status: GOOD ( 12.35 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Jingbao Qiu Add RTC devicetree binding for Sophgo CV1800 SoC. Reviewed-by: Krzysztof Kozlowski Signed-off-by: Jingbao Qiu Signed-off-by: Alexander Sverdlin --- .../bindings/rtc/sophgo,cv1800-rtc.yaml | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml diff --git a/Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml b/Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml new file mode 100644 index 000000000000..b36b51a69166 --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml @@ -0,0 +1,53 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/rtc/sophgo,cv1800-rtc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Real Time Clock of the Sophgo CV1800 SoC + +description: + Real Time Clock (RTC) is an independently powered module + within the chip, which includes a 32KHz oscillator and a + Power On Reset/POR submodule. It can be used for time display + and timed alarm generation. In addition, the hardware state + machine provides triggering and timing control for chip + power on, off, and reset. + +maintainers: + - Jingbao Qiu + +allOf: + - $ref: rtc.yaml# + +properties: + compatible: + const: sophgo,cv1800-rtc + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + +required: + - compatible + - reg + - interrupts + - clocks + +unevaluatedProperties: false + +examples: + - | + #include + + rtc@5025000 { + compatible = "sophgo,cv1800-rtc"; + reg = <0x5025000 0x2000>; + interrupts = <17 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&osc>; + }; From patchwork Thu Feb 13 18:46:15 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Sverdlin X-Patchwork-Id: 13974028 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C9934C021A8 for ; Thu, 13 Feb 2025 20:41:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=NRTiglTpyqMKxgMFKUmr/vpsPPH4d5CAcmIJaHbQn2A=; b=RVMpQMJdO7rrF0 8tGKXEikffWXTc5hM2WOSc7UaD66VOVzwOlf6lFdLUFZ487hrWLkPd1A21+T7orBKJgRbXcFHcv3t +H8Ce8fL/rV2pAum5zW3DBPO9W8zHEtnL/Bm2djx+8dSvx4iQukZRS4fG3Z5O3Ataqgl0w0aR+EjG 2omkn2Atv6Zh6E2VoRMCZhoTPj18E5nqJTfCa2hNlCrR76oNIZBYBe5Zwdew6w1LM+4SOg/s+L0l5 y8W6HczDyE3pHK01kYSETtRV2+Rg4lRElo/4Oi4LUSGAZR+I/eZ4I9KhvI3UI2LhM9Un2ubVD1t8R RxZziDTKgykcr3GCM9ZA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tig1S-0000000CZTy-3itL; Thu, 13 Feb 2025 20:41:22 +0000 Received: from mail-ej1-x62d.google.com ([2a00:1450:4864:20::62d]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tieEH-0000000CIFb-0DW2 for linux-riscv@lists.infradead.org; Thu, 13 Feb 2025 18:46:30 +0000 Received: by mail-ej1-x62d.google.com with SMTP id a640c23a62f3a-ab7e80c4b55so258569366b.0 for ; Thu, 13 Feb 2025 10:46:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1739472387; x=1740077187; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=HaEihAiyP6MocC5Oa52F4VzuNeOxClEAtoQkxcRqaYg=; b=MndlFiDeaSy8/KysnsoBA0Av9ME6O15aLarJIA3Rl7iMDyQ2EtZMVZdHWbUqWRvIjU fALaObZpyybXiYXJxMbEc9tlROPqpuLJSOfjn1BzWq39t2mvJXBortAF+xXZfJt1/EPA fcwnS1HyC08f45FaJcNHVUUweTghTsusQAF5/YsgTRXnZo1dpfznIuvhVQDVwbJZfcFK 4WpLIvMNjYcO8x2UgaU9lcvjerqO4SsNXNeUuD/FfCB1RZkAAnDJQ0wFi7SCZOZjGzpv 2L/ssQvYUhxkMzTjD8FSe9271+RcJle2f4fmx9aZ9/+h/Uh3rQ9Nb74lHWDXrI8fOsHf 12oQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739472387; x=1740077187; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=HaEihAiyP6MocC5Oa52F4VzuNeOxClEAtoQkxcRqaYg=; b=D3B51yfRIe0nlKL1JMkeHUghH5VdZRjgR+ULNauHSvMSO5Sq3z9w2w6hNq4EL0ogCL bA9/kYxKYuml5eLVYZKKVH5Tbzh+Pjry6bF+6v4zKNfZsE/MFlhnVBIe/LHB85G8rtr0 dk62tBn8AvKA+4CR/AOiFyWvhuzXLiv9UIk2oEwzC21QlUNqqZNgC+Pq0QcHFVV7lpab a91NXk6zrzjqT6Z5ZOLbaPruGqD7+Q9STH1QuCv9Ah2pocFYEKME0R4ujIuS/IGaeMtL HWxEHFXMdkIh06PdsVdvWGZJyg8qiKpgZCy35tFZkN2R/3L8hEp/W1z+DAZ5AnEXBqpa +4fg== X-Gm-Message-State: AOJu0YzJsrJIvNW8B3dsvmXpwv2WyyFiEgZSl/3XhEvEcWb6YsJs0KA0 9QBVLROwA8PHZUwwfbDzjFuMK28oyCDUG5oh9J0RRGiuxqcYVFbOYiXDByoW X-Gm-Gg: ASbGncuwGCUSqOggL6tZUv7OFMZ4YpbpYTDjQcEvByX5VvrJ3SBPW5EJxCqppLUGHYn q0Sn9Dd+gXyjPLPO0fHuHQ+wZPYcjiefHvZ/KcZUF85iutCcqkit2QhscUEgggTB9Wyro5fQggI UlsGUzayQ6khkOK3RBqPtj405i+6uCYjb7aNVaX4UTRzj8pr18XBD/gYA9EAw9NVNBPF6uLAaM6 E6sGYayBQrdFyqwYkdDfJ+FsTE0CXQprBDQOX7YHrDtFioD99ZTt/oPImq4ZM6kB9udG8lNkStU kA4ydPUqu2KXhwebG8AG5jiVHvgo X-Google-Smtp-Source: AGHT+IGGkWWLaNNzOzd7hKMrdf41hfYgyJmTTQbUi197zNRcg+XO4S8rTNRAVGB7tDq/vKYEFmIXRw== X-Received: by 2002:a17:906:6a23:b0:ab6:dace:e763 with SMTP id a640c23a62f3a-aba5017e5d9mr408825466b.38.1739472387157; Thu, 13 Feb 2025 10:46:27 -0800 (PST) Received: from giga-mm.. ([2a02:1210:861b:6f00:82ee:73ff:feb8:99e3]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aba533998e2sm181360466b.134.2025.02.13.10.46.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Feb 2025 10:46:26 -0800 (PST) From: Alexander Sverdlin To: linux-riscv@lists.infradead.org, linux-rtc@vger.kernel.org Cc: Jingbao Qiu , Inochi Amaoto , alexandre.belloni@bootlin.com, robh@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, unicorn_wang@outlook.com, inochiama@outlook.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, dlan@gentoo.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Alexander Sverdlin Subject: [PATCH v10 2/2] rtc: sophgo: add rtc support for Sophgo CV1800 SoC Date: Thu, 13 Feb 2025 19:46:15 +0100 Message-ID: <20250213184622.2099324-3-alexander.sverdlin@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250213184622.2099324-1-alexander.sverdlin@gmail.com> References: <20250213184622.2099324-1-alexander.sverdlin@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250213_104629_099795_9547FE2C X-CRM114-Status: GOOD ( 23.21 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Jingbao Qiu Implement the RTC driver for CV1800, which able to provide time alarm. Signed-off-by: Jingbao Qiu Signed-off-by: Alexander Sverdlin --- Changes since v9: - further simplified bitmask macros; - unconditional RTC start (rtc_enable_sec_counter()), otherwise didn't start on SG2000; - dropped ANA_CALIB modification (has been forgotten in v8 with the drop of SW calibration to switch to HW calibration); - successfully tested on SG2000; drivers/rtc/Kconfig | 10 ++ drivers/rtc/Makefile | 1 + drivers/rtc/rtc-cv1800.c | 223 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 234 insertions(+) create mode 100644 drivers/rtc/rtc-cv1800.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 0bbbf778ecfa..019622db3e93 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1159,6 +1159,16 @@ config RTC_DRV_DS2404 This driver can also be built as a module. If so, the module will be called rtc-ds2404. +config RTC_DRV_CV1800 + tristate "Sophgo CV1800 RTC" + depends on ARCH_SOPHGO || COMPILE_TEST + help + If you say yes here you get support the RTC driver + for Sophgo CV1800 chip. + + This driver can also be built as a module. If so, the + module will be called rtc-cv1800. + config RTC_DRV_DA9052 tristate "Dialog DA9052/DA9053 RTC" depends on PMIC_DA9052 diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 489b4ab07068..621b30a33dda 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -44,6 +44,7 @@ obj-$(CONFIG_RTC_DRV_CADENCE) += rtc-cadence.o obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o obj-$(CONFIG_RTC_DRV_CPCAP) += rtc-cpcap.o obj-$(CONFIG_RTC_DRV_CROS_EC) += rtc-cros-ec.o +obj-$(CONFIG_RTC_DRV_CV1800) += rtc-cv1800.o obj-$(CONFIG_RTC_DRV_DA9052) += rtc-da9052.o obj-$(CONFIG_RTC_DRV_DA9055) += rtc-da9055.o obj-$(CONFIG_RTC_DRV_DA9063) += rtc-da9063.o diff --git a/drivers/rtc/rtc-cv1800.c b/drivers/rtc/rtc-cv1800.c new file mode 100644 index 000000000000..63d36f68a119 --- /dev/null +++ b/drivers/rtc/rtc-cv1800.c @@ -0,0 +1,223 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * rtc-cv1800.c: RTC driver for Sophgo cv1800 RTC + * + * Author: Jingbao Qiu + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define SEC_PULSE_GEN 0x1004 +#define ALARM_TIME 0x1008 +#define ALARM_ENABLE 0x100C +#define SET_SEC_CNTR_VAL 0x1010 +#define SET_SEC_CNTR_TRIG 0x1014 +#define SEC_CNTR_VAL 0x1018 + +/* + * When in VDDBKUP domain, this MACRO register + * does not power down + */ +#define MACRO_RO_T 0x14A8 +#define MACRO_RG_SET_T 0x1498 + +#define ALARM_ENABLE_MASK BIT(0) +#define SET_SEC_CNTR_VAL_INIT GENMASK(29, 28) +#define SEL_SEC_PULSE BIT(31) + +struct cv1800_rtc_priv { + struct rtc_device *rtc_dev; + struct regmap *rtc_map; + struct clk *clk; + int irq; +}; + +static const struct regmap_config cv1800_rtc_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static int cv1800_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct cv1800_rtc_priv *info = dev_get_drvdata(dev); + + regmap_write(info->rtc_map, ALARM_ENABLE, enabled); + + return 0; +} + +static int cv1800_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct cv1800_rtc_priv *info = dev_get_drvdata(dev); + unsigned long alarm_time; + + alarm_time = rtc_tm_to_time64(&alrm->time); + + cv1800_rtc_alarm_irq_enable(dev, 0); + + regmap_write(info->rtc_map, ALARM_TIME, alarm_time); + + cv1800_rtc_alarm_irq_enable(dev, alrm->enabled); + + return 0; +} + +static int cv1800_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct cv1800_rtc_priv *info = dev_get_drvdata(dev); + u32 enabled; + u32 time; + + regmap_read(info->rtc_map, ALARM_ENABLE, &enabled); + + alarm->enabled = enabled & ALARM_ENABLE_MASK; + + regmap_read(info->rtc_map, ALARM_TIME, &time); + + rtc_time64_to_tm(time, &alarm->time); + + return 0; +} + +static void rtc_enable_sec_counter(struct cv1800_rtc_priv *info) +{ + u32 sec_ro_t; + u32 sec; + + /* select inner sec pulse */ + regmap_update_bits(info->rtc_map, SEC_PULSE_GEN, SEL_SEC_PULSE, 0); + + sec = SET_SEC_CNTR_VAL_INIT; + + /* load from MACRO register */ + regmap_read(info->rtc_map, MACRO_RO_T, &sec_ro_t); + if (sec_ro_t > (SET_SEC_CNTR_VAL_INIT)) + sec = sec_ro_t; + + regmap_write(info->rtc_map, SET_SEC_CNTR_VAL, sec); + regmap_write(info->rtc_map, SET_SEC_CNTR_TRIG, 1); +} + +static int cv1800_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct cv1800_rtc_priv *info = dev_get_drvdata(dev); + u32 sec; + + regmap_read(info->rtc_map, SEC_CNTR_VAL, &sec); + + rtc_time64_to_tm(sec, tm); + + return 0; +} + +static int cv1800_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct cv1800_rtc_priv *info = dev_get_drvdata(dev); + unsigned long sec; + + sec = rtc_tm_to_time64(tm); + + regmap_write(info->rtc_map, SET_SEC_CNTR_VAL, sec); + regmap_write(info->rtc_map, SET_SEC_CNTR_TRIG, 1); + + regmap_write(info->rtc_map, MACRO_RG_SET_T, sec); + + return 0; +} + +static irqreturn_t cv1800_rtc_irq_handler(int irq, void *dev_id) +{ + struct cv1800_rtc_priv *info = dev_id; + + rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); + + regmap_write(info->rtc_map, ALARM_ENABLE, 0); + + return IRQ_HANDLED; +} + +static const struct rtc_class_ops cv1800_rtc_ops = { + .read_time = cv1800_rtc_read_time, + .set_time = cv1800_rtc_set_time, + .read_alarm = cv1800_rtc_read_alarm, + .set_alarm = cv1800_rtc_set_alarm, + .alarm_irq_enable = cv1800_rtc_alarm_irq_enable, +}; + +static int cv1800_rtc_probe(struct platform_device *pdev) +{ + struct cv1800_rtc_priv *rtc; + u32 ctrl_val; + void __iomem *base; + int ret; + + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + rtc->rtc_map = devm_regmap_init_mmio(&pdev->dev, base, + &cv1800_rtc_regmap_config); + if (IS_ERR(rtc->rtc_map)) + return PTR_ERR(rtc->rtc_map); + + rtc->irq = platform_get_irq(pdev, 0); + if (rtc->irq < 0) + return rtc->irq; + + rtc->clk = devm_clk_get_enabled(&pdev->dev, NULL); + if (IS_ERR(rtc->clk)) + return dev_err_probe(&pdev->dev, PTR_ERR(rtc->clk), + "clk not found\n"); + + platform_set_drvdata(pdev, rtc); + + device_init_wakeup(&pdev->dev, 1); + + rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev); + if (IS_ERR(rtc->rtc_dev)) + return PTR_ERR(rtc->rtc_dev); + + rtc->rtc_dev->ops = &cv1800_rtc_ops; + rtc->rtc_dev->range_max = U32_MAX; + + ret = devm_request_irq(&pdev->dev, rtc->irq, cv1800_rtc_irq_handler, + IRQF_TRIGGER_HIGH, "rtc alarm", rtc); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "cannot register interrupt handler\n"); + + rtc_enable_sec_counter(rtc); + + return devm_rtc_register_device(rtc->rtc_dev); +} + +static const struct of_device_id cv1800_dt_ids[] = { + { .compatible = "sophgo,cv1800-rtc" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, cv1800_dt_ids); + +static struct platform_driver cv1800_rtc_driver = { + .driver = { + .name = "sophgo-cv1800-rtc", + .of_match_table = cv1800_dt_ids, + }, + .probe = cv1800_rtc_probe, +}; + +module_platform_driver(cv1800_rtc_driver); +MODULE_AUTHOR("Jingbao Qiu"); +MODULE_DESCRIPTION("Sophgo cv1800 RTC Driver"); +MODULE_LICENSE("GPL");