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([2a02:1210:861b:6f00:82ee:73ff:feb8:99e3]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aba532595dfsm209794266b.70.2025.02.13.13.57.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Feb 2025 13:57:01 -0800 (PST) From: Alexander Sverdlin To: devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-rtc@vger.kernel.org Cc: Alexander Sverdlin , 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, Jingbao Qiu , Krzysztof Kozlowski Subject: [PATCH v11 0/3] riscv: rtc: sophgo: add rtc support for CV1800 Date: Thu, 13 Feb 2025 22:56:44 +0100 Message-ID: <20250213215655.2311793-1-alexander.sverdlin@gmail.com> X-Mailer: git-send-email 2.48.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250213_135704_331332_48E2A05D X-CRM114-Status: GOOD ( 14.93 ) 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 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. Changes since v10: - only start RTC on set_time; - add machine restart handler (as separate patch 3/3); Changes since v9: - picked up orphaned series; - further simplified bitmask macros; - unconditional RTC start (rtc_enable_sec_counter()); - dropped ANA_CALIB modification; - successfully tested on SG2000; v9: https://lore.kernel.org/linux-riscv/20240428060848.706573-1-qiujingbao.dlmu@gmail.com/ Changes since v8: - delete unused macros - using 0/1 instead of the DISABLE/ENABLE macro - pass in the correct pointer when applying for IRQ - convert the incoming pointer into an appropriate structure pointer in the irq handler v8: https://lore.kernel.org/all/20240204044143.415915-1-qiujingbao.dlmu@gmail.com/ Changes since v7: - pass checkpatch.pl --strict - using u32 replace uint32 - using devm_kzalloc(*) replace devm_kzalloc(sizeof()) - sort header files alphabetically - delete unnecessary header files - fix wrap error - drop dependent description - using hardware automatic calibration replace software calibration. see documentation 197 page v7: https://lore.kernel.org/all/20240122080500.2621-1-qiujingbao.dlmu@gmail.com/ documentation: https://github.com/milkv-duo/duo-files/blob/main/duo/datasheet/CV1800B-CV1801B-Preliminary-Datasheet-full-en.pdf Changes since v6: - completely delete POR dt node - remove syscon tag - use devm_regmap_init_mmio() replace syscon_node_to_regmap v6: https://lore.kernel.org/all/20240115160600.5444-1-qiujingbao.dlmu@gmail.com/ Changes since v5: - remove unnecessary lock - fix cv1800_rtc_alarm_irq_enable() - remove duplicate checks - using alrm->enabled instead of unconditionally enabling - remove disable alarms on probe - using rtc_update_irq() replace mess of alarm - remove leak clk - useing devm_rtc_allocate_device() and devm_rtc_register_device() instead old way - add judgment for rtc_enable_sec_counter() - add POR nodes in DTS. This POR device shares the register region with the RTC device v5: https://lore.kernel.org/all/20240108072253.30183-1-qiujingbao.dlmu@gmail.com/ Changes since v4: - remove POR dt-bindings because it empty - remove MFD dt-bindings because SoC does not have MFDs - add syscon attribute to share registers with POR v4: https://lore.kernel.org/all/20231229090643.116575-1-qiujingbao.dlmu@gmail.com/ Changes since v3: - temporarily not submitting RTC driver code waiting for communication with IC designer - add MFD dt-bindings - add POR dt-bindings v3: https://lore.kernel.org/all/20231226100431.331616-1-qiujingbao.dlmu@gmail.com/ Changes since v2: - add mfd support for CV1800 - add rtc to mfd - using regmap replace iomap - merge register address in dts v2: https://lore.kernel.org/lkml/20231217110952.78784-1-qiujingbao.dlmu@gmail.com/ Changes since v1 - fix duplicate names in subject - using RTC replace RTC controller - improve the properties of dt-bindings - using `unevaluatedProperties` replace `additionalProperties` - dt-bindings passed the test - using `devm_platform_ioremap_resource()` replace `platform_get_resource()` and `devm_ioremap_resource()` - fix random order of the code - fix wrong wrapping of the `devm_request_irq()` and map the flag with dts - using devm_clk_get_enabled replace `devm_clk_get()` and `clk_prepare_enable()` - fix return style - add rtc clock calibration function - use spinlock when write register on read/set time v1: https://lore.kernel.org/lkml/20231121094642.2973795-1-qiujingbao.dlmu@gmail.com/ Alexander Sverdlin (1): rtc: sophgo: cv18xx: Add restart handler Jingbao Qiu (2): dt-bindings: rtc: sophgo: add RTC support for Sophgo CV1800 series SoC rtc: sophgo: add rtc support for Sophgo CV1800 SoC .../bindings/rtc/sophgo,cv1800-rtc.yaml | 53 ++++ drivers/rtc/Kconfig | 10 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-cv1800.c | 277 ++++++++++++++++++ 4 files changed, 341 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml create mode 100644 drivers/rtc/rtc-cv1800.c