From patchwork Thu Dec 23 05:06:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li-hao Kuo X-Patchwork-Id: 527908 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 CC04BC433EF for ; Thu, 23 Dec 2021 05:06:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232010AbhLWFGX (ORCPT ); Thu, 23 Dec 2021 00:06:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33516 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230113AbhLWFGW (ORCPT ); Thu, 23 Dec 2021 00:06:22 -0500 Received: from mail-pg1-x535.google.com (mail-pg1-x535.google.com [IPv6:2607:f8b0:4864:20::535]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA30BC061401; Wed, 22 Dec 2021 21:06:21 -0800 (PST) Received: by mail-pg1-x535.google.com with SMTP id v25so3931088pge.2; Wed, 22 Dec 2021 21:06:21 -0800 (PST) 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=rs8+NtHVHeaYW7hEVsp2d+01AFTPC1CQK7yX0xYeBOk=; b=kLtlug0aOEtRbEIN1I3bfKHKz267Tv4Sp3FBjBhPN4zIAAw+H7MyyfUBCFLnNYiQFs kOk+UCKRhHe/jH40njtE7WoBbBqCgPGZMplaoAoVmnTFQdZGQnF0UhQreuGkvhdXpNdK Ycpk6wqYq1WWxG+X2qCJz8wNBxPUX+HGGdBtOL+fB4fk+vLFe7Yk0mOzyIxRHR1oYuIb FZ5HMeju77v3Hs20nUVgsfSxfE9HVEMoj46yyLjo07hvkUok1wolE8u5NojIiRscopQy jw9DUS9WDgNHnkgQpOLWkdaerDrFCbgesNQ2VJKYqUT3xmI9bay9vn0WLNKdKU9dVDU/ xZVw== 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=rs8+NtHVHeaYW7hEVsp2d+01AFTPC1CQK7yX0xYeBOk=; b=SSIvYBPAY4AmhWJEFlHBbQof1JLO9ebXeKc5yb69AgpkYYEv4tDb89Gxf9F0CoQ9eI L77hQixRhug3GYXvub8aHeliJG7MHhLC9wklVGSj0HOiSxVoq1hSUdE7e19s+Vqe6KEj 9ANwd++UkizsSwXg5cHj2CHanCG6/a4t9psD46lWahcnx+KTXIt/nInrTV8xC9+hle68 AKFKtrFJqY9yzr8fbCUzgPRZRk1BhY2BDDvFl8KHYx8h+3zQHUcJjZ3kpcs3uQ8esIXt czH/cI+PuM8fE61VcMMlijW41qnxvklQ26mIAyuWtg2jnEhvp70CBJkoeQZpq1TSlmT4 5Yrg== X-Gm-Message-State: AOAM532kZM5i/4Si7UrslVFl2xl2tUgxMLGeR1WJB4sZCene5eRGJBmB JIhMbYIzKfGAvLC5VoWIWlM= X-Google-Smtp-Source: ABdhPJw+i8emDaS4YD6OJzzF5HcUApl/OJGbyv+18hyK3hogIiu18ju7dJAqfevW2RZhF0vYwfHXVQ== X-Received: by 2002:aa7:938d:0:b0:4ba:c445:8761 with SMTP id t13-20020aa7938d000000b004bac4458761mr924105pfe.12.1640235981104; Wed, 22 Dec 2021 21:06:21 -0800 (PST) Received: from scdiu3.sunplus.com ([113.196.136.192]) by smtp.googlemail.com with ESMTPSA id oo13sm4170936pjb.25.2021.12.22.21.06.19 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 22 Dec 2021 21:06:20 -0800 (PST) From: Li-hao Kuo To: 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: wells.lu@sunplus.com, Li-hao Kuo Subject: [PATCH v2 1/2] THERMAL: Add THERMAL driver for Sunplus SP7021 Date: Thu, 23 Dec 2021 13:06:25 +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 SP7021. Signed-off-by: Li-hao Kuo Reported-by: kernel test robot Reported-by: kernel test robot --- Changes in v2: - Addressed all comments from Mr. Rob Herring - Modify Theraml driver MAINTAINERS | 6 ++ drivers/thermal/Kconfig | 10 +++ drivers/thermal/Makefile | 1 + drivers/thermal/sunplus_thermal.c | 161 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 178 insertions(+) create mode 100644 drivers/thermal/sunplus_thermal.c diff --git a/MAINTAINERS b/MAINTAINERS index 8912b2c..5f1fa6d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18242,6 +18242,12 @@ L: netdev@vger.kernel.org S: Maintained F: drivers/net/ethernet/dlink/sundance.c +SUNPLUS THERMAL DRIVER +M: Li-hao Kuo +L: linux-pm@vger.kernel.org +S: Maintained +F: drivers/thermal/sunplus_thermal.c + SUPERH M: Yoshinori Sato M: Rich Felker diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index d7f44de..ddad391 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -493,4 +493,14 @@ 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 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 82fc3e6..23f8dce 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -60,3 +60,4 @@ 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..35e68bc --- /dev/null +++ b/drivers/thermal/sunplus_thermal.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) Sunplus Inc. + * Author: Li-hao Kuo + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DISABLE_THREMAL (BIT(31) | BIT(15)) +#define ENABLE_THREMAL BIT(31) +#define SP_THREMAL_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; + struct platform_device *pdev; + enum thermal_device_mode mode; + long sensor_temp; + void __iomem *regs; + int otp_temp0; + int otp_temp1; + u32 id; +}; + +char *sp7021_otp_coef_read(struct device *dev, ssize_t *len) +{ + char *ret = NULL; + struct nvmem_cell *c = nvmem_cell_get(dev, "therm_calib"); + + if (IS_ERR_OR_NULL(c)) { + dev_err(dev, "OTP read failure:%ld", PTR_ERR(c)); + return NULL; + } + ret = nvmem_cell_read(c, len); + nvmem_cell_put(c); + dev_dbg(dev, "%d bytes read from OTP", *len); + return ret; +} + +static void sp7021_get_otp_temp_coef(struct sp_thermal_data *sp_data, struct device *_d) +{ + ssize_t otp_l = 0; + char *otp_v; + + otp_v = sp7021_otp_coef_read(_d, &otp_l); + if (otp_l < 3) + return; + if (IS_ERR_OR_NULL(otp_v)) + return; + sp_data->otp_temp0 = otp_v[0] | (otp_v[1] << 8); + sp_data->otp_temp0 = otp_v[0] | (otp_v[1] << 8); + sp_data->otp_temp0 = FIELD_GET(SP_THREMAL_MASK, sp_data->otp_temp0); + sp_data->otp_temp1 = (otp_v[1] >> 3) | (otp_v[2] << 5); + sp_data->otp_temp1 = FIELD_GET(SP_THREMAL_MASK, sp_data->otp_temp1); + if (sp_data->otp_temp0 == 0) + sp_data->otp_temp0 = TEMP_OTP_BASE; +} + +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_THREMAL_MASK, t_code); + *temp = ((sp_data->otp_temp0 - t_code) * 10000 / TEMP_RATE) + TEMP_BASE; + *temp *= 10; + dev_dbg(&(sp_data->pdev->dev), "tc:%d t:%d", t_code, *temp); + return 0; +} + +static struct thermal_zone_of_device_ops sp_of_thermal_ops = { + .get_temp = sp_thermal_get_sensor_temp, +}; + +static int sp_thermal_register_sensor(struct platform_device *pdev, struct sp_thermal_data *data, + int index) +{ + int ret; + + data->id = index; + data->pcb_tz = devm_thermal_zone_of_sensor_register(&pdev->dev, + data->id, data, &sp_of_thermal_ops); + if (!IS_ERR_OR_NULL(data->pcb_tz)) + return 0; + ret = PTR_ERR(data->pcb_tz); + data->pcb_tz = NULL; + dev_err(&pdev->dev, "sensor#%d reg fail: %d\n", index, ret); + return ret; +} + +static int sp7021_thermal_probe(struct platform_device *pdev) +{ + struct sp_thermal_data *sp_data; + struct resource *res; + int ret; + + sp_data = devm_kzalloc(&(pdev->dev), sizeof(*sp_data), GFP_KERNEL); + if (!sp_data) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (IS_ERR(res)) + return dev_err_probe(&(pdev->dev), PTR_ERR(res), "resource get fail\n"); + + sp_data->regs = devm_ioremap(&(pdev->dev), res->start, resource_size(res)); + if (IS_ERR(sp_data->regs)) + return dev_err_probe(&(pdev->dev), PTR_ERR(sp_data->regs), "mas_base get fail\n"); + + writel(ENABLE_THREMAL, sp_data->regs + SP_THERMAL_CTL0_REG); + + platform_set_drvdata(pdev, sp_data); + sp7021_get_otp_temp_coef(sp_data, &pdev->dev); + ret = sp_thermal_register_sensor(pdev, sp_data, 0); + + return ret; +} + +static int sp7021_thermal_remove(struct platform_device *_pd) +{ + return 0; +} + +static const struct of_device_id of_sp7021_thermal_ids[] = { + { .compatible = "sunplus,sp7021-thermal" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_sp7021_thermal_ids); + +static struct platform_driver sp7021_thermal_driver = { + .probe = sp7021_thermal_probe, + .remove = sp7021_thermal_remove, + .driver = { + .name = "sp7021-thermal", + .of_match_table = of_match_ptr(of_sp7021_thermal_ids), + }, +}; +module_platform_driver(sp7021_thermal_driver); + +MODULE_AUTHOR("Li-hao Kuo "); +MODULE_DESCRIPTION("Thermal driver for SP7021 SoC"); +MODULE_LICENSE("GPL v2");