From patchwork Tue Oct 18 07:32:51 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: 13010097 X-Patchwork-Delegate: daniel.lezcano@linaro.org 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 D376AC433FE for ; Tue, 18 Oct 2022 07:33:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230272AbiJRHdV (ORCPT ); Tue, 18 Oct 2022 03:33:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36834 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230239AbiJRHdS (ORCPT ); Tue, 18 Oct 2022 03:33:18 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D4D2691A8; Tue, 18 Oct 2022 00:33:14 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id k9so12600992pll.11; Tue, 18 Oct 2022 00:33:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=references:in-reply-to:references:in-reply-to:message-id:date :subject:cc:to:from:from:to:cc:subject:date:message-id:reply-to; bh=kjbPHXqyVQKTBNGKhAz9KJkxl8OTw4y/RUKXsXL8Wqc=; b=YVYyx4KOy//UpLvWWqJsCWYzv2gQjalPRYP7YW+cfdlNxCoWzKNDbj4hjLWeZU5CBY FRjw3fbWXFGO3G/A9T+Kajb8Yfjn4wB8/O4D/dO3D6f+6E2Z5qp/42EHMfxkx72kU6VD Q+2MJsSmLK7331RQE2lIZraQv9/ryTu64c2heSS6NNXHLY9T/40JLZKCEH5ZCILPke2v Wxe80Uv7/nixfEmyc/8K0BMloZvoOL2XGGE+8QlwT0oCtVGJyNP5cmq3YAstg7GKzmZA iTfrqKxAJ6Eu3lirzU9FTCXLruWzYWuMstMLDyP1lhjGyOuUd0Wg2LDXl5UOoq6qWRHu 294A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=references:in-reply-to:references:in-reply-to:message-id:date :subject:cc:to:from:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=kjbPHXqyVQKTBNGKhAz9KJkxl8OTw4y/RUKXsXL8Wqc=; b=nm6ajnGILL89Ap2nZxV8FvfyK18PJkanooi77AwjFaR3bV/fNKY1XKHWIdSsRUS9/Y Uqjpru9VBFUtfsHKr4eAxfI3GTTwaHbQbuREzJU73O8iKFn1bHvved4cqKB5+2SoypXs gBpvL/bCzzT9Md7er9gt2cCuveLA7PsXp1tcItv2jEP9KWBcn89LzjVqjp7iXZTPGj3v oU3Gs4HEMF3scgnj4kaCJey6ZLRh/R1ecbuq8yQyhDfNKj7mueXYMxYtHC4lOB9M7qnk ARc67JzOutASU2rN2cypNqlmbAQXF4s76rM38HzF9zmncirDNaIWRvTkhldPQBSIrMZX d1pA== X-Gm-Message-State: ACrzQf2sYIpaKMoeAx8RQdh7eCiifSFLEZN8UvX8w0VnhN4DOB4JEpLg XIhTScijN2dmarDdQ/d3KKKj2WRUN8DUng== X-Google-Smtp-Source: AMsMyM5Jwfp21wPltxo9rtJBcrwJBF3BHn5kv8oRtXdlHz9UJhjMJMdLPpxlYVCzdEyVjr5oRnJGLQ== X-Received: by 2002:a17:902:a60c:b0:184:fa22:8b3c with SMTP id u12-20020a170902a60c00b00184fa228b3cmr1667837plq.136.1666078393319; Tue, 18 Oct 2022 00:33:13 -0700 (PDT) Received: from scdiu3.sunplus.com ([113.196.136.192]) by smtp.googlemail.com with ESMTPSA id s1-20020a170902ea0100b001769206a766sm7853260plg.307.2022.10.18.00.33.10 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 18 Oct 2022 00:33:12 -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 v11 1/2] thermal: Add thermal driver for Sunplus Date: Tue, 18 Oct 2022 15:32:51 +0800 Message-Id: <076585e120b64832dcb81e39f3e59d719148816b.1665990345.git.lhjeff911@gmail.com> 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 --- Changes in v11: - Remove the remove function of the platform_driver - Fix error reported-by: kernel test robot. MAINTAINERS | 6 ++ drivers/thermal/Kconfig | 10 +++ drivers/thermal/Makefile | 1 + drivers/thermal/sunplus_thermal.c | 130 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 147 insertions(+) create mode 100644 drivers/thermal/sunplus_thermal.c diff --git a/MAINTAINERS b/MAINTAINERS index cf0f185..bf22c53 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19753,6 +19753,12 @@ 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 e052dae..405b788 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 2506c6c..4512193 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 \ No newline at end of file diff --git a/drivers/thermal/sunplus_thermal.c b/drivers/thermal/sunplus_thermal.c new file mode 100644 index 0000000..20ea7d9 --- /dev/null +++ b/drivers/thermal/sunplus_thermal.c @@ -0,0 +1,130 @@ +// 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(&pdev->dev, "failed to register tsensor: %d\n", ret); + return ret; + } + + return ret; +} + +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, + .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");