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Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen Wang , Inochi Amaoto , Paul Walmsley , Palmer Dabbelt , Albert Ou , Jisheng Zhang Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Haylen Chu Subject: [PATCH v4 1/3] dt-bindings: thermal: sophgo,cv1800-thermal: Add Sophgo CV1800 thermal Date: Tue, 16 Jul 2024 09:42:33 +0000 Message-ID: X-Mailer: git-send-email 2.45.2 In-Reply-To: References: X-TMN: [1Qn/yyu0Ed40mCrve2gGJ9XcE7GsJTCu] X-ClientProxiedBy: SI2PR04CA0010.apcprd04.prod.outlook.com (2603:1096:4:197::11) To SEYPR01MB4221.apcprd01.prod.exchangelabs.com (2603:1096:101:56::12) X-Microsoft-Original-Message-ID: <20240716094235.51679-1-heylenay@outlook.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SEYPR01MB4221:EE_|TYZPR01MB4895:EE_ X-MS-Office365-Filtering-Correlation-Id: 1c2c4cc3-c0ca-43f0-5e72-08dca57baa1c X-Microsoft-Antispam: BCL:0;ARA:14566002|8060799006|19110799003|461199028|3412199025|1602099012|4302099013|440099028|1710799026; X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 1c2c4cc3-c0ca-43f0-5e72-08dca57baa1c X-MS-Exchange-CrossTenant-AuthSource: SEYPR01MB4221.apcprd01.prod.exchangelabs.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jul 2024 09:42:53.5973 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: TYZPR01MB4895 Add devicetree binding documentation for thermal sensors integrated in Sophgo CV180X SoCs. Signed-off-by: Haylen Chu --- .../thermal/sophgo,cv1800-thermal.yaml | 55 +++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml diff --git a/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml new file mode 100644 index 000000000000..58bd4432cd10 --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/sophgo,cv1800-thermal.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/thermal/sophgo,cv1800-thermal.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Sophgo CV1800 on-SoC Thermal Sensor + +maintainers: + - Haylen Chu + +description: Sophgo CV1800 on-SoC thermal sensor + +properties: + compatible: + enum: + - sophgo,cv1800-thermal + + reg: + maxItems: 1 + + clocks: + description: The thermal sensor clock + + interrupts: + maxItems: 1 + + sample-rate-hz: + minimum: 1 + maximum: 1908 + default: 1 + + '#thermal-sensor-cells': + const: 0 + +required: + - compatible + - reg + - clocks + - interrupts + +additionalProperties: false + +examples: + - | + #include + #include + thermal-sensor@30e0000 { + compatible = "sophgo,cv1800-thermal"; + reg = <0x30e0000 0x100>; + clocks = <&clk CLK_TEMPSEN>; + interrupts = <16 IRQ_TYPE_LEVEL_HIGH>; + #thermal-sensor-cells = <0>; + }; +... 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Signed-off-by: Haylen Chu --- arch/riscv/boot/dts/sophgo/cv1800b.dtsi | 30 +++++++++++++++++++++++++ arch/riscv/boot/dts/sophgo/cv18xx.dtsi | 8 +++++++ 2 files changed, 38 insertions(+) diff --git a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi index ec9530972ae2..0b5c7bc94b05 100644 --- a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi +++ b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi @@ -12,6 +12,34 @@ memory@80000000 { device_type = "memory"; reg = <0x80000000 0x4000000>; }; + + thermal-zones { + soc-thermal { + polling-delay-passive = <1000>; + polling-delay = <1000>; + thermal-sensors = <&soc_temp>; + + trips { + soc_passive: soc-passive { + temperature = <75000>; + hysteresis = <5000>; + type = "passive"; + }; + + soc_hot: soc-hot { + temperature = <85000>; + hysteresis = <5000>; + type = "hot"; + }; + + soc_critical: soc-critical { + temperature = <100000>; + hysteresis = <0>; + type = "critical"; + }; + }; + }; + }; }; &plic { @@ -25,3 +53,5 @@ &clint { &clk { compatible = "sophgo,cv1800-clk"; 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Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen Wang , Inochi Amaoto , Paul Walmsley , Palmer Dabbelt , Albert Ou , Jisheng Zhang Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Haylen Chu Subject: [PATCH v4 3/3] thermal: cv180x: Add cv180x thermal driver support Date: Tue, 16 Jul 2024 09:42:35 +0000 Message-ID: X-Mailer: git-send-email 2.45.2 In-Reply-To: References: X-TMN: [dpfur8txUxkJLfBUTN3M8cdWVTStQeJQ] X-ClientProxiedBy: SI2PR04CA0010.apcprd04.prod.outlook.com (2603:1096:4:197::11) To SEYPR01MB4221.apcprd01.prod.exchangelabs.com (2603:1096:101:56::12) X-Microsoft-Original-Message-ID: <20240716094235.51679-3-heylenay@outlook.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SEYPR01MB4221:EE_|TYZPR01MB4895:EE_ X-MS-Office365-Filtering-Correlation-Id: 42def73b-3d69-4496-33a7-08dca57bb025 X-Microsoft-Antispam: BCL:0;ARA:14566002|8060799006|19110799003|461199028|3412199025|440099028|1710799026; X-Microsoft-Antispam-Message-Info: 9itgIIYiy59aJbOVoXRnrXPv0V4mDlHbvptjNQcae4kbIKpth+Z3iwffbDGxxfaG0lnSmD9jmdNdDSvhIzTQuZcrD61+gfqahh7V1BFoIfp4ckc+CTRQ+Au/JA3CaywgwA9sfIpfqhzlKZizzb9BAd3DP0lyeKp435XcSP5aQa6E6HZxdUy2ZO9rmDO0TOXmykbH8Z0Zu5FZlAxaSKzv1TYBy78qkBwIOadeecqK/L+K1mAf/ALxC+k+5yAGjZC2lAgFZUb8qFVSVMVt1p6dZGM+gJpr82ZtrIlIIMJTslwP6mFOTUW1YG7uTNIiuXa+NZfM1x4GIbxV+xzjd2+plWyIv844W/ssjob+N0qcNQVXKBLYnTaIbs8aSb2eXT/y87mF5A8phQDaU5GYXbgFK5wqTX+U4hTJ/02NfyLjExth7eYjEwFUAluAdUL+0DoaV+rBaxcc2QSmO5S/61mSg32dQzkbzJAaNZpmuPQytV+gFSB9eXbYWLElVdMaUQeD5cN+6S/ROMuxfscSCycxm6Fe1jUZjLy30MzeCoRfzv5pnFYuh9WRlUV8KtL08iMq7jCeSzTvdOi001eL6BGZLtEXTahcKyGcLu2bx/v+DdcBBXcLcevsPCx9oF8jidYcEhqBtuhFwX2nMIjo+IRzjW+PWeYEkvTBVorARJNcMj7WG3YXc7tEpoGmit4vZHzW X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 42def73b-3d69-4496-33a7-08dca57bb025 X-MS-Exchange-CrossTenant-AuthSource: SEYPR01MB4221.apcprd01.prod.exchangelabs.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jul 2024 09:43:03.6885 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: TYZPR01MB4895 Add support for cv180x SoCs integrated thermal sensors. Signed-off-by: Haylen Chu --- drivers/thermal/Kconfig | 6 + drivers/thermal/Makefile | 1 + drivers/thermal/cv180x_thermal.c | 241 +++++++++++++++++++++++++++++++ 3 files changed, 248 insertions(+) create mode 100644 drivers/thermal/cv180x_thermal.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 204ed89a3ec9..f53c973a361d 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -514,4 +514,10 @@ config LOONGSON2_THERMAL is higher than the high temperature threshold or lower than the low temperature threshold, the interrupt will occur. +config CV180X_THERMAL + tristate "Temperature sensor driver for Sophgo CV180X" + help + If you say yes here you get support for thermal sensor integrated in + Sophgo CV180X SoCs. + endif diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 5cdf7d68687f..5b59bde8a579 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -65,3 +65,4 @@ obj-$(CONFIG_AMLOGIC_THERMAL) += amlogic_thermal.o obj-$(CONFIG_SPRD_THERMAL) += sprd_thermal.o obj-$(CONFIG_KHADAS_MCU_FAN_THERMAL) += khadas_mcu_fan.o obj-$(CONFIG_LOONGSON2_THERMAL) += loongson2_thermal.o +obj-$(CONFIG_CV180X_THERMAL) += cv180x_thermal.o diff --git a/drivers/thermal/cv180x_thermal.c b/drivers/thermal/cv180x_thermal.c new file mode 100644 index 000000000000..8b726c0ad848 --- /dev/null +++ b/drivers/thermal/cv180x_thermal.c @@ -0,0 +1,241 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021 Sophgo Inc. + * Copyright (C) 2024 Haylen Chu + */ + +#include +#include +#include +#include +#include +#include +#include + +#define TEMPSEN_VERSION 0x0 +#define TEMPSEN_CTRL 0x4 +#define TEMPSEN_CTRL_EN BIT(0) +#define TEMPSEN_CTRL_SEL_MASK GENMASK(7, 4) +#define TEMPSEN_CTRL_SEL_OFFSET 4 +#define TEMPSEN_STATUS 0x8 +#define TEMPSEN_SET 0xc +#define TEMPSEN_SET_CHOPSEL_MASK GENMASK(5, 4) +#define TEMPSEN_SET_CHOPSEL_OFFSET 4 +#define TEMPSEN_SET_CHOPSEL_128T 0 +#define TEMPSEN_SET_CHOPSEL_256T 1 +#define TEMPSEN_SET_CHOPSEL_512T 2 +#define TEMPSEN_SET_CHOPSEL_1024T 3 +#define TEMPSEN_SET_ACCSEL_MASK GENMASK(7, 6) +#define TEMPSEN_SET_ACCSEL_OFFSET 6 +#define TEMPSEN_SET_ACCSEL_512T 0 +#define TEMPSEN_SET_ACCSEL_1024T 1 +#define TEMPSEN_SET_ACCSEL_2048T 2 +#define TEMPSEN_SET_ACCSEL_4096T 3 +#define TEMPSEN_SET_CYC_CLKDIV_MASK GENMASK(15, 8) +#define TEMPSEN_SET_CYC_CLKDIV_OFFSET 8 +#define TEMPSEN_INTR_EN 0x10 +#define TEMPSEN_INTR_CLR 0x14 +#define TEMPSEN_INTR_STA 0x18 +#define TEMPSEN_INTR_RAW 0x1c +#define TEMPSEN_RESULT(n) (0x20 + (n) * 4) +#define TEMPSEN_RESULT_RESULT_MASK GENMASK(12, 0) +#define TEMPSEN_RESULT_MAX_RESULT_MASK GENMASK(28, 16) +#define TEMPSEN_RESULT_CLR_MAX_RESULT BIT(31) +#define TEMPSEN_AUTO_PERIOD 0x64 +#define TEMPSEN_AUTO_PERIOD_AUTO_CYCLE_MASK GENMASK(23, 0) +#define TEMPSEN_AUTO_PERIOD_AUTO_CYCLE_OFFSET 0 + +struct cv180x_thermal_zone { + struct device *dev; + void __iomem *base; + struct clk *clk_tempsen; + u32 sample_cycle; +}; + +static void cv180x_thermal_init(struct cv180x_thermal_zone *ctz) +{ + void __iomem *base = ctz->base; + u32 regval; + + writel(readl(base + TEMPSEN_INTR_RAW), base + TEMPSEN_INTR_CLR); + writel(TEMPSEN_RESULT_CLR_MAX_RESULT, base + TEMPSEN_RESULT(0)); + + regval = readl(base + TEMPSEN_SET); + regval &= ~TEMPSEN_SET_CHOPSEL_MASK; + regval &= ~TEMPSEN_SET_ACCSEL_MASK; + regval &= ~TEMPSEN_SET_CYC_CLKDIV_MASK; + regval |= TEMPSEN_SET_CHOPSEL_1024T << TEMPSEN_SET_CHOPSEL_OFFSET; + regval |= TEMPSEN_SET_ACCSEL_2048T << TEMPSEN_SET_ACCSEL_OFFSET; + regval |= 0x31 << TEMPSEN_SET_CYC_CLKDIV_OFFSET; + writel(regval, base + TEMPSEN_SET); + + regval = readl(base + TEMPSEN_AUTO_PERIOD); + regval &= ~TEMPSEN_AUTO_PERIOD_AUTO_CYCLE_MASK; + regval |= ctz->sample_cycle << TEMPSEN_AUTO_PERIOD_AUTO_CYCLE_OFFSET; + writel(regval, base + TEMPSEN_AUTO_PERIOD); + + regval = readl(base + TEMPSEN_CTRL); + regval &= ~TEMPSEN_CTRL_SEL_MASK; + regval |= 1 << TEMPSEN_CTRL_SEL_OFFSET; + regval |= TEMPSEN_CTRL_EN; + writel(regval, base + TEMPSEN_CTRL); +} + +static void cv180x_thermal_deinit(struct cv180x_thermal_zone *ct) +{ + void __iomem *base = ct->base; + u32 regval; + + regval = readl(base + TEMPSEN_CTRL); + regval &= ~(TEMPSEN_CTRL_SEL_MASK | TEMPSEN_CTRL_EN); + writel(regval, base + TEMPSEN_CTRL); + + writel(readl(base + TEMPSEN_INTR_RAW), base + TEMPSEN_INTR_CLR); +} + +/* + * Raw register value to temperature (mC) formula: + * + * read_val * 1000 * 716 + * Temperature = ----------------------- - 273000 + * divider + * + * where divider should be ticks number of accumulation period, + * e.g. 2048 for TEMPSEN_CTRL_ACCSEL_2048T + */ +static int cv180x_calc_temp(struct cv180x_thermal_zone *ctz, u32 result) +{ + return (result * 1000) * 716 / 2048 - 273000; +} + +static int cv180x_get_temp(struct thermal_zone_device *tdev, int *temperature) +{ + struct cv180x_thermal_zone *ctz = thermal_zone_device_priv(tdev); + void __iomem *base = ctz->base; + u32 result; + + result = readl(base + TEMPSEN_RESULT(0)) & TEMPSEN_RESULT_RESULT_MASK; + *temperature = cv180x_calc_temp(ctz, result); + + return 0; +} + +static const struct thermal_zone_device_ops cv180x_thermal_ops = { + .get_temp = cv180x_get_temp, +}; + +static const struct of_device_id cv180x_thermal_of_match[] = { + { .compatible = "sophgo,cv1800-thermal" }, + {}, +}; +MODULE_DEVICE_TABLE(of, cv180x_thermal_of_match); + +static int +cv180x_parse_dt(struct cv180x_thermal_zone *ctz) +{ + struct device_node *np = ctz->dev->of_node; + u32 tmp; + + if (of_property_read_u32(np, "sample-rate-hz", &tmp)) { + ctz->sample_cycle = 1000000; + } else { + /* sample cycle should be at least 524us */ + if (tmp > 1000000 / 524) { + dev_err(ctz->dev, "invalid sample rate %d\n", tmp); + return -EINVAL; + } + + ctz->sample_cycle = 1000000 / tmp; + } + + return 0; +} + +static int cv180x_thermal_probe(struct platform_device *pdev) +{ + struct cv180x_thermal_zone *ctz; + struct thermal_zone_device *tz; + struct resource *res; + int ret; + + ctz = devm_kzalloc(&pdev->dev, sizeof(*ctz), GFP_KERNEL); + if (!ctz) + return -ENOMEM; + + ctz->dev = &pdev->dev; + + ret = cv180x_parse_dt(ctz); + if (ret) + return dev_err_probe(&pdev->dev, ret, "failed to parse dt\n"); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ctz->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ctz->base)) + return dev_err_probe(&pdev->dev, PTR_ERR(ctz->base), + "failed to map tempsen registers\n"); + + ctz->clk_tempsen = devm_clk_get_enabled(&pdev->dev, NULL); + if (IS_ERR(ctz->clk_tempsen)) + return dev_err_probe(&pdev->dev, PTR_ERR(ctz->clk_tempsen), + "failed to get clk_tempsen\n"); + + cv180x_thermal_init(ctz); + + tz = devm_thermal_of_zone_register(&pdev->dev, 0, ctz, + &cv180x_thermal_ops); + if (IS_ERR(tz)) + return dev_err_probe(&pdev->dev, PTR_ERR(tz), + "failed to register thermal zone\n"); + + platform_set_drvdata(pdev, ctz); + + return 0; +} + +static int cv180x_thermal_remove(struct platform_device *pdev) +{ + struct cv180x_thermal_zone *ctz = platform_get_drvdata(pdev); + + cv180x_thermal_deinit(ctz); + + return 0; +} + +static int __maybe_unused cv180x_thermal_suspend(struct device *dev) +{ + struct cv180x_thermal_zone *ctz = dev_get_drvdata(dev); + + cv180x_thermal_deinit(ctz); + clk_disable_unprepare(ctz->clk_tempsen); + + return 0; +} + +static int __maybe_unused cv180x_thermal_resume(struct device *dev) +{ + struct cv180x_thermal_zone *ctz = dev_get_drvdata(dev); + + clk_prepare_enable(ctz->clk_tempsen); + cv180x_thermal_init(ctz); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(cv180x_thermal_pm_ops, + cv180x_thermal_suspend, cv180x_thermal_resume); + +static struct platform_driver cv180x_thermal_driver = { + .probe = cv180x_thermal_probe, + .remove = cv180x_thermal_remove, + .driver = { + .name = "cv180x-thermal", + .pm = &cv180x_thermal_pm_ops, + .of_match_table = cv180x_thermal_of_match, + }, +}; + +module_platform_driver(cv180x_thermal_driver); + +MODULE_DESCRIPTION("Sophgo CV180x thermal driver"); +MODULE_AUTHOR("Haylen Chu "); +MODULE_LICENSE("GPL");