From patchwork Tue Jul 12 07:30:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li-hao Kuo X-Patchwork-Id: 590229 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23312C433EF for ; Tue, 12 Jul 2022 07:31:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232336AbiGLHbj (ORCPT ); Tue, 12 Jul 2022 03:31:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37826 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232329AbiGLHbh (ORCPT ); Tue, 12 Jul 2022 03:31:37 -0400 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A939A99661; Tue, 12 Jul 2022 00:31:36 -0700 (PDT) Received: by mail-pj1-x102e.google.com with SMTP id fz10so6888392pjb.2; Tue, 12 Jul 2022 00:31:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=m2QT0zAuCqwcPmvaYj5/N1FN8bWkD80+OKsR0WiVxc8=; b=jRtWuduZ2CwXXaf71nnLZO9NnzlJoFo1o/0E8hLsZZfYQ0AQLD8Y7Xk3rKSzRS1xrE XtmLupbqOGFvMFD7tBNcobyGksHoXknAoao4QXC/z7J3k/uVwblqi/Plg2SQWrd4C4pc Abhu5m7hfnixQPWQk9liNDfAHoO5p0NY9SUXJWMiqEAMNuInm0zFU6qjn//s/uuSuNQU 4GvVPfJ+TDApXQpXLJIOHlODCWmwulIWLCqUy4F3TNCmYTw1zG5YGk7RZaDNxmVk3YyQ ScLMtdteK3klei8eCv6ysFOmwNEnQflESk+3bnVzK1odhlbtbUid2q+ydOJ1l/eorPMp rAhA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=m2QT0zAuCqwcPmvaYj5/N1FN8bWkD80+OKsR0WiVxc8=; b=yZwYWD/TBrM1kUsb9I3QH30eAzdLEnB/swhWPHGLF/HKqtindQfJTeDmC3bKfjKK4T yvwZz70I/tl/LQopDB+byzwNFojJWJEdWIVtKto/3SW54VaGSAPYPsLNp4FXT86sXOPq fODGoh2I+kvhoW5XqFOjQK9gabDQ1q64Lb9WT3tm0EeEm3n6Qp8gueS/4aUW6Znia6zG 0t+Qdz6KwQEUGBydwLdiFk9sRHteqF0rYPEFfyDWmk4vAqouDO4QYzevnHBQKFGYKQFo hgJd2sFG6F3vuGO1skUGdpuuJgdSgBn232bCU++/CjGsI3Y7KVud/oERy4VMq2ihUihn x+sw== X-Gm-Message-State: AJIora88vsy5rRht7tC/KEnNCRDrq9i4+UIkJN4SObSW7GWHyyk73RAd sh9hEt6BV0k1SuYuYfsSW9Tbs7PMiR4h/A== X-Google-Smtp-Source: AGRyM1s9rHIQF6lInCgW6yG5sosK3a5vbo22XEHRg4cwJ25n5DjPYVWEXFHN/iQneTTo/J4ZwPRNTg== X-Received: by 2002:a17:903:189:b0:16c:39b2:c217 with SMTP id z9-20020a170903018900b0016c39b2c217mr14862275plg.113.1657611096092; Tue, 12 Jul 2022 00:31:36 -0700 (PDT) Received: from scdiu3.sunplus.com ([113.196.136.192]) by smtp.googlemail.com with ESMTPSA id t18-20020a170902d29200b0016c09a0ef87sm5994557plc.255.2022.07.12.00.31.33 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 12 Jul 2022 00:31:34 -0700 (PDT) From: Li-hao Kuo To: krzk@kernel.org, rafael@kernel.org, daniel.lezcano@linaro.org, amitk@kernel.org, rui.zhang@intel.com, robh+dt@kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: lh.kuo@sunplus.com, Li-hao Kuo Subject: [PATCH v10 1/2] thermal: Add thermal driver for Sunplus Date: Tue, 12 Jul 2022 15:30:44 +0800 Message-Id: X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add thermal driver for Sunplus. Signed-off-by: Li-hao Kuo Reported-by: kernel test robot --- Changes in v10: - Change the setting of compatible - Mosdify the setting of remove funciton. MAINTAINERS | 6 ++ drivers/thermal/Kconfig | 10 +++ drivers/thermal/Makefile | 1 + drivers/thermal/sunplus_thermal.c | 139 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 156 insertions(+) create mode 100644 drivers/thermal/sunplus_thermal.c diff --git a/MAINTAINERS b/MAINTAINERS index a6d3bd9..23bde07 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19103,6 +19103,12 @@ S: Maintained F: Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml F: drivers/spi/spi-sunplus-sp7021.c +SUNPLUS THERMAL DRIVER +M: Li-hao Kuo +L: linux-pm@vger.kernel.org +S: Maintained +F: drivers/thermal/sunplus_thermal.c + SUNPLUS UART DRIVER M: Hammer Hsieh S: Maintained diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 0e5cc94..c85e668 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -504,4 +504,14 @@ config KHADAS_MCU_FAN_THERMAL If you say yes here you get support for the FAN controlled by the Microcontroller found on the Khadas VIM boards. +config SUNPLUS_THERMAL + tristate "Sunplus thermal drivers" + depends on SOC_SP7021 || COMPILE_TEST + help + This enable the Sunplus SP7021 thermal driver, which supports the primitive + temperature sensor embedded in Sunplus SP7021 SoC. + + If you have a Sunplus SP7021 platform say Y here and enable this option + to have support for thermal management. + endif diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index def8e1a..b603730 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -61,3 +61,4 @@ obj-$(CONFIG_UNIPHIER_THERMAL) += uniphier_thermal.o obj-$(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_SUNPLUS_THERMAL) += sunplus_thermal.o diff --git a/drivers/thermal/sunplus_thermal.c b/drivers/thermal/sunplus_thermal.c new file mode 100644 index 0000000..ed73a15 --- /dev/null +++ b/drivers/thermal/sunplus_thermal.c @@ -0,0 +1,139 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) Sunplus Inc. + * Author: Li-hao Kuo + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ENABLE_THERMAL BIT(31) +#define SP_THERMAL_MASK GENMASK(10, 0) + +#define TEMP_RATE 608 +#define TEMP_BASE 3500 +#define TEMP_OTP_BASE 1518 + +#define SP_THERMAL_CTL0_REG 0x0000 +#define SP_THERMAL_STS0_REG 0x0030 + +/* common data structures */ +struct sp_thermal_data { + struct thermal_zone_device *pcb_tz; + void __iomem *regs; + int *otp_temp0; +}; + +static int sunplus_get_otp_temp_coef(struct sp_thermal_data *sp_data, struct device *dev) +{ + struct nvmem_cell *cell; + ssize_t otp_l; + + cell = nvmem_cell_get(dev, "calib"); + if (IS_ERR(cell)) + return PTR_ERR(cell); + + sp_data->otp_temp0 = nvmem_cell_read(cell, &otp_l); + nvmem_cell_put(cell); + + if (*sp_data->otp_temp0 == 0) + *sp_data->otp_temp0 = TEMP_OTP_BASE; + + return 0; +} + +/* + * There is a thermal sensor instance for Sunplus Soc + * T_CODE is the ADC of the thermal sensor + * T_CODE : 11 digits in total + * When remanufacturing, the 35 degree T_CODE will be read and stored in nvcell. + * otp_temp0 is the 35 degree T_CODE obtained from nvcell + * The function will get 35 degree T_CODE for thermal calibration. + * TEMP_RATE is the Sunplus thermal temperature slope. + */ + +static int sp_thermal_get_sensor_temp(void *data, int *temp) +{ + struct sp_thermal_data *sp_data = data; + int t_code; + + t_code = readl(sp_data->regs + SP_THERMAL_STS0_REG); + t_code = FIELD_GET(SP_THERMAL_MASK, t_code); + *temp = ((*sp_data->otp_temp0 - t_code) * 10000 / TEMP_RATE) + TEMP_BASE; + *temp *= 10; + return 0; +} + +static const struct thermal_zone_of_device_ops sp_of_thermal_ops = { + .get_temp = sp_thermal_get_sensor_temp, +}; + +static int sunplus_thermal_probe(struct platform_device *pdev) +{ + struct sp_thermal_data *sp_data; + int ret; + + sp_data = devm_kzalloc(&pdev->dev, sizeof(*sp_data), GFP_KERNEL); + if (!sp_data) + return -ENOMEM; + + sp_data->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(sp_data->regs)) { + dev_err(&pdev->dev, "resource get fail\n"); + return PTR_ERR(sp_data->regs); + } + + writel(ENABLE_THERMAL, sp_data->regs + SP_THERMAL_CTL0_REG); + + platform_set_drvdata(pdev, sp_data); + ret = sunplus_get_otp_temp_coef(sp_data, &pdev->dev); + if (ret) + return ret; + + sp_data->pcb_tz = devm_thermal_zone_of_sensor_register(&pdev->dev, + 0, + sp_data, &sp_of_thermal_ops); + + if (IS_ERR(sp_data->pcb_tz)) { + ret = PTR_ERR(sp_data->pcb_tz); + dev_err(dev, "Failed to register tsensor: %d\n", ret); + return ret; + } + + return ret; +} + +static int sunplus_thermal_remove(struct platform_device *pdev) +{ + struct sp_thermal_data *sp_data = platform_get_drvdata(pdev); + + thermal_zone_of_sensor_unregister(&pdev->dev, sp_data->pcb_tz); + return 0; +} + +static const struct of_device_id of_sunplus_thermal_ids[] = { + { .compatible = "sunplus,sp7021-thermal" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_sunplus_thermal_ids); + +static struct platform_driver sunplus_thermal_driver = { + .probe = sunplus_thermal_probe, + .remove = sunplus_thermal_remove, + .driver = { + .name = "sunplus-thermal", + .of_match_table = of_sunplus_thermal_ids, + }, +}; +module_platform_driver(sunplus_thermal_driver); + +MODULE_AUTHOR("Li-hao Kuo "); +MODULE_DESCRIPTION("Thermal driver for Sunplus SoC"); +MODULE_LICENSE("GPL");