From patchwork Fri Jun 10 01:32:16 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: 580896 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 2D70DCCA480 for ; Fri, 10 Jun 2022 01:31:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243242AbiFJBbY (ORCPT ); Thu, 9 Jun 2022 21:31:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58546 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243014AbiFJBbW (ORCPT ); Thu, 9 Jun 2022 21:31:22 -0400 Received: from mail-yw1-x1132.google.com (mail-yw1-x1132.google.com [IPv6:2607:f8b0:4864:20::1132]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A1642DD2F7; Thu, 9 Jun 2022 18:31:20 -0700 (PDT) Received: by mail-yw1-x1132.google.com with SMTP id 00721157ae682-3137c877092so58525737b3.13; Thu, 09 Jun 2022 18:31:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:from:date:message-id:subject:to:cc; bh=HWvVQh5kVq3Tzv+knJyrp33L0772CHDDuvD3or3h+LY=; b=RmoVA7VKI0Vqts1YNiNLaS/oHACxerh4NKbncWclahykA6R5Eh0zSyRD/n/guMs4NY MZsjb15ih7O6n1jfBaCVw+/Jn/P1bpubbPReV8PvH+kyDhfbO3yqz3TaqJc/4JjOBmpf jf3UrXxuar+z8NAcOp5mJc9qXoq9St3cYCGgWq1iscljlq5iPJnRycGNE6/dbs3tsr8z UfSqnO1Y5vAhvf8K3Oz+4sffrC4oRSY5J7B+SwZDqrTvRv7W6i1Qdx7PRhHVy1RkB7YS uG9NFt3Z/CbbChOyZ96h2gJ5kdq4/i0bD0W7mPhu6S5vo5fu1cEXdAaUofoZ8GNC75D0 XS6w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=HWvVQh5kVq3Tzv+knJyrp33L0772CHDDuvD3or3h+LY=; b=UwqykVHqj+tnOY7+trK5o7ink2yvENye0LP45fYF4jkS36K/p7Of9pcQXWxKylCYNs 5SuMlu07n5Hs7imyRXYueFz+nXWHuVoeEfcJTcam/7sDTHCCNNoeWdnsW3uhHtfsDSMH M4XJDePeRpNWw669SCfCAwATJV2oh6qiF42Cgk6S24g13geG5qPFQBeAeT7UCN4+B7si Na1DeDWVBKYTfe2MC0KyuV05DQ6Z7wd4010P5QHAMB+lNlVt0wI6cjFNDoTXXP8nNXcn xNv2m9PIyio8OBM4vefvBGr73HooHJRDLW8AZERszJUKbz4UBv97qRtBACzA3EnbL5qX AnRQ== X-Gm-Message-State: AOAM530bSnFwLnUpZtLubsq/0iE8WrUgMz9MYNjs1zVPFldvlW5a5RUH uAeq01H58vPJ4lXmf2dbUydHRr/X9ucauVX8oiE= X-Google-Smtp-Source: ABdhPJy4zrQ6/2Yec9FBU+k8T3ReOM2EsFkigKMnw9jHCiFB6jQGOZ5bEUDOOt5VLepRzZ7AxnijZrDXkeolnmB+bl0= X-Received: by 2002:a81:9bd8:0:b0:30c:86d3:d121 with SMTP id s207-20020a819bd8000000b0030c86d3d121mr45985459ywg.482.1654824679710; Thu, 09 Jun 2022 18:31:19 -0700 (PDT) MIME-Version: 1.0 From: =?utf-8?b?6YOt5Yqb6LGq?= Date: Fri, 10 Jun 2022 09:32:16 +0800 Message-ID: Subject: [PATCH v9 1/2] thermal: Add thermal driver for Sunplus To: krzk@kernel.org, rafael@kernel.org, Daniel Lezcano , 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" , =?utf-8?b?5ZGC6Iqz6aiwTHVXZWxscw==?= Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add thermal driver for Sunplus. Signed-off-by: Li-hao Kuo --- Changes in v9: - 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 +MODULE_DESCRIPTION("Thermal driver for Sunplus SoC"); +MODULE_LICENSE("GPL"); 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 ");