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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 v3 3/3] thermal: cv180x: Add cv180x thermal driver support Date: Tue, 2 Jul 2024 09:30:26 +0000 Message-ID: X-Mailer: git-send-email 2.45.2 In-Reply-To: References: X-TMN: [HlG6xpx/xUv4htAWsxl7H/bl9bDttrt8] X-ClientProxiedBy: SI2P153CA0006.APCP153.PROD.OUTLOOK.COM (2603:1096:4:140::22) To SEYPR01MB4221.apcprd01.prod.exchangelabs.com (2603:1096:101:56::12) X-Microsoft-Original-Message-ID: <20240702093025.449-4-heylenay@outlook.com> MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SEYPR01MB4221:EE_|SEZPR01MB4613:EE_ X-MS-Office365-Filtering-Correlation-Id: 86cbac35-d5eb-4025-b55d-08dc9a79ba8d X-Microsoft-Antispam: BCL:0;ARA:14566002|461199028|8060799006|3412199025|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: 86cbac35-d5eb-4025-b55d-08dc9a79ba8d X-MS-Exchange-CrossTenant-AuthSource: SEYPR01MB4221.apcprd01.prod.exchangelabs.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jul 2024 09:31:19.4236 (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: SEZPR01MB4613 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240702_023127_692684_4597EAAE X-CRM114-Status: GOOD ( 18.14 ) 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 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 | 281 +++++++++++++++++++++++++++++++ 3 files changed, 288 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..ab8f0ba8113d --- /dev/null +++ b/drivers/thermal/cv180x_thermal.c @@ -0,0 +1,281 @@ +// 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 chop_period; + u32 accum_period; + 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 |= ctz->chop_period << TEMPSEN_SET_CHOPSEL_OFFSET; + regval |= ctz->accum_period << 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) +{ + u32 divider = (u32)(512 * int_pow(2, ctz->accum_period)); + + return (result * 1000) * 716 / divider - 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, "accumulation-period", &tmp)) { + ctz->accum_period = TEMPSEN_SET_ACCSEL_2048T; + } else { + switch (tmp) { + case 512: + ctz->accum_period = TEMPSEN_SET_ACCSEL_512T; + break; + case 1024: + ctz->accum_period = TEMPSEN_SET_ACCSEL_1024T; + break; + case 2048: + ctz->accum_period = TEMPSEN_SET_ACCSEL_2048T; + break; + case 4096: + ctz->accum_period = TEMPSEN_SET_ACCSEL_4096T; + break; + default: + dev_err(ctz->dev, "invalid accumulation period %d\n", + tmp); + return -EINVAL; + } + } + + if (of_property_read_u32(np, "chop-period", &tmp)) { + ctz->chop_period = TEMPSEN_SET_CHOPSEL_1024T; + } else { + switch (tmp) { + case 128: + ctz->chop_period = TEMPSEN_SET_CHOPSEL_128T; + break; + case 256: + ctz->chop_period = TEMPSEN_SET_CHOPSEL_256T; + break; + case 512: + ctz->chop_period = TEMPSEN_SET_CHOPSEL_512T; + break; + case 1024: + ctz->chop_period = TEMPSEN_SET_CHOPSEL_1024T; + break; + default: + dev_err(ctz->dev, "invalid chop period %d\n", tmp); + return -EINVAL; + } + } + + if (of_property_read_u32(np, "sample-cycle-us", &ctz->sample_cycle)) + ctz->sample_cycle = 1000000; + + 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");