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Fri, 3 Apr 2026 05:50:12 +0000 From: Changhuang Liang To: Michael Turquette , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Stephen Boyd , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Philipp Zabel , Emil Renner Berthing Cc: Chen Wang , Inochi Amaoto , Alexey Charkov , Thomas Bogendoerfer , Keguang Zhang , linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, Ley Foon Tan , Changhuang Liang Subject: [PATCH v1 10/13] reset: starfive: Add syscon reset driver support Date: Thu, 2 Apr 2026 22:49:42 -0700 Message-Id: <20260403054945.467700-11-changhuang.liang@starfivetech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260403054945.467700-1-changhuang.liang@starfivetech.com> References: <20260403054945.467700-1-changhuang.liang@starfivetech.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: BJXPR01CA0052.CHNPR01.prod.partner.outlook.cn (2406:e500:c211:12::19) To ZQ4PR01MB1202.CHNPR01.prod.partner.outlook.cn (2406:e500:c550:17::6) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: ZQ4PR01MB1202:EE_|ZQ4PR01MB1252:EE_ X-MS-Office365-Filtering-Correlation-Id: c8f30830-e2d7-4ae1-932e-08de9144df7e X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|52116014|7416014|376014|921020|38350700014|56012099003|22082099003|18002099003; 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Signed-off-by: Changhuang Liang --- drivers/reset/starfive/Kconfig | 9 ++++ drivers/reset/starfive/Makefile | 1 + .../starfive/reset-starfive-jhb100-syscon.c | 48 +++++++++++++++++++ 3 files changed, 58 insertions(+) create mode 100644 drivers/reset/starfive/reset-starfive-jhb100-syscon.c diff --git a/drivers/reset/starfive/Kconfig b/drivers/reset/starfive/Kconfig index 6f9a0f24f9b9..cd5ae9cad9d9 100644 --- a/drivers/reset/starfive/Kconfig +++ b/drivers/reset/starfive/Kconfig @@ -28,3 +28,12 @@ config RESET_STARFIVE_JHB100 default ARCH_STARFIVE help This enables the reset controller driver for the StarFive JHB100 SoC. + +config RESET_STARFIVE_JHB100_SYSCON + bool "StarFive JHB100 SYSCON Reset Driver" + depends on ARCH_STARFIVE || COMPILE_TEST + select RESET_STARFIVE_COMMON + default ARCH_STARFIVE + help + This enables the SYSCON reset controller driver for the StarFive + JHB100 SoC. diff --git a/drivers/reset/starfive/Makefile b/drivers/reset/starfive/Makefile index 217002302a9f..d5033d723167 100644 --- a/drivers/reset/starfive/Makefile +++ b/drivers/reset/starfive/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_RESET_STARFIVE_COMMON) += reset-starfive-common.o obj-$(CONFIG_RESET_STARFIVE_JH7100) += reset-starfive-jh7100.o obj-$(CONFIG_RESET_STARFIVE_JH7110) += reset-starfive-jh7110.o obj-$(CONFIG_RESET_STARFIVE_JHB100) += reset-starfive-jhb100.o +obj-$(CONFIG_RESET_STARFIVE_JHB100_SYSCON) += reset-starfive-jhb100-syscon.o diff --git a/drivers/reset/starfive/reset-starfive-jhb100-syscon.c b/drivers/reset/starfive/reset-starfive-jhb100-syscon.c new file mode 100644 index 000000000000..8de6419615c2 --- /dev/null +++ b/drivers/reset/starfive/reset-starfive-jhb100-syscon.c @@ -0,0 +1,48 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * SYSCON Reset driver for the StarFive JHB110 SoC + * + * Copyright (C) 2025 StarFive Technology Co., Ltd. + */ + +#include +#include +#include + +#include "reset-starfive-common.h" + +#define JHB100_PCIERP_SYSCON_RESET_ASSERT0 0x00 + +static int jhb100_syscon_reset_probe(struct platform_device *pdev) +{ + void __iomem *base = devm_platform_ioremap_resource(pdev, 0); + + if (IS_ERR(base)) + return PTR_ERR(base); + + return reset_starfive_register_polarity(&pdev->dev, pdev->dev.of_node, + base + JHB100_PCIERP_SYSCON_RESET_ASSERT0, + base + JHB100_PCIERP_SYSCON_RESET_ASSERT0, + NULL, + JHB100_PCIERP_SYSCONRST_PE2RST_OUT + 1, + NULL); +} + +static const struct of_device_id jhb100_syscon_reset_dt_ids[] = { + { .compatible = "starfive,jhb100-reset-pcierp" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, jhb100_syscon_reset_dt_ids); + +static struct platform_driver jhb100_syscon_reset_driver = { + .probe = jhb100_syscon_reset_probe, + .driver = { + .name = "jhb100-syscon-reset", + .of_match_table = jhb100_syscon_reset_dt_ids, + }, +}; +module_platform_driver(jhb100_syscon_reset_driver); + +MODULE_AUTHOR("Changhuang Liang "); +MODULE_DESCRIPTION("StarFive JHB100 SYSCON reset driver"); +MODULE_LICENSE("GPL"); -- 2.25.1