From patchwork Wed Sep 21 01:56:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinbo Zhu X-Patchwork-Id: 12982970 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 7B703C54EE9 for ; Wed, 21 Sep 2022 01:56:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231479AbiIUB4V (ORCPT ); Tue, 20 Sep 2022 21:56:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229993AbiIUB4U (ORCPT ); Tue, 20 Sep 2022 21:56:20 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id D3C0879631; Tue, 20 Sep 2022 18:56:17 -0700 (PDT) Received: from localhost.localdomain (unknown [10.180.13.64]) by localhost.localdomain (Coremail) with SMTP id AQAAf8DxReI3bypj2yYfAA--.51844S2; Wed, 21 Sep 2022 09:56:13 +0800 (CST) From: Yinbo Zhu To: "Rafael J . Wysocki" , Daniel Lezcano , Amit Kucheria , Zhang Rui , Rob Herring , Krzysztof Kozlowski , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: zhanghongchen , Yinbo Zhu Subject: [PATCH v2 1/3] MAINTAINERS: add maintainer for thermal driver for loongson2 SoCs Date: Wed, 21 Sep 2022 09:56:03 +0800 Message-Id: <20220921015605.17078-1-zhuyinbo@loongson.cn> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CM-TRANSID: AQAAf8DxReI3bypj2yYfAA--.51844S2 X-Coremail-Antispam: 1UD129KBjvdXoW7Xw1kAFWxZryrXF1kAw15XFb_yoWDJFb_AF 1Iqa18Za18AF1ak3ykZryxJ343Zr4xGF13A3Zrt39rA34Dtay3AFyDJwnxuw18Cr4UuryS ya97Gr1xur12qjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbV8FF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_ Gr1UM28EF7xvwVC2z280aVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Cr 1j6rxdM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj 6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr 0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E 8cxan2IY04v7MxkIecxEwVCm-wCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJV W8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF 1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6x IIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvE x4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvj DU0xZFpf9x0JUdHUDUUUUU= X-CM-SenderInfo: 52kx5xhqerqz5rrqw2lrqou0/ Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add zhanghongchen and myself as maintainer of the loongson2 SoC series thermal driver. Signed-off-by: Yinbo Zhu --- Change in v2: 1. Update file name. MAINTAINERS | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 589517372408..63076e12c91a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11899,6 +11899,14 @@ F: drivers/*/*loongarch* F: Documentation/loongarch/ F: Documentation/translations/zh_CN/loongarch/ +LOONGSON2 SOC SERIES THERMAL DRIVER +M: zhanghongchen +M: Yinbo Zhu +L: linux-pm@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/thermal/loongson2-thermal.yaml +F: drivers/thermal/loongson2_thermal.c + LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI) M: Sathya Prakash M: Sreekanth Reddy From patchwork Wed Sep 21 01:56:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinbo Zhu X-Patchwork-Id: 12982971 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 3B4A3C6FA90 for ; Wed, 21 Sep 2022 01:56:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230150AbiIUB4V (ORCPT ); Tue, 20 Sep 2022 21:56:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48972 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229805AbiIUB4U (ORCPT ); Tue, 20 Sep 2022 21:56:20 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id F3AA979632; Tue, 20 Sep 2022 18:56:17 -0700 (PDT) Received: from localhost.localdomain (unknown [10.180.13.64]) by localhost.localdomain (Coremail) with SMTP id AQAAf8DxReI3bypj2yYfAA--.51844S3; Wed, 21 Sep 2022 09:56:13 +0800 (CST) From: Yinbo Zhu To: "Rafael J . Wysocki" , Daniel Lezcano , Amit Kucheria , Zhang Rui , Rob Herring , Krzysztof Kozlowski , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: zhanghongchen , Yinbo Zhu Subject: [PATCH v2 2/3] dt-bindings: thermal: Convert loongson2 to json-schema Date: Wed, 21 Sep 2022 09:56:04 +0800 Message-Id: <20220921015605.17078-2-zhuyinbo@loongson.cn> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20220921015605.17078-1-zhuyinbo@loongson.cn> References: <20220921015605.17078-1-zhuyinbo@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8DxReI3bypj2yYfAA--.51844S3 X-Coremail-Antispam: 1UD129KBjvJXoW7AFyxtrykGw1UKryxWF1xXwb_yoW8CryUpF 43Cw1UGr4vgF17ZanxGa48Ar4Yya9YyF9rXrs7Ww1rtF98Ja4Sqw4akr1UX3yxCr1DKFy7 uFWkur4jk3WDC3DanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPl14x267AKxVW5JVWrJwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jr4l82xGYIkIc2 x26xkF7I0E14v26r4j6ryUM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr1UM2 8EF7xvwVC2z280aVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Cr1j6rxd M2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjx v20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1l F7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8cxan2 IY04v7MxkIecxEwVCm-wCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC2 0s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI 0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv2 0xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2js IE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZF pf9x0JU2_M3UUUUU= X-CM-SenderInfo: 52kx5xhqerqz5rrqw2lrqou0/ Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Convert the loongson2 thermal binding to DT schema format using json-schema. Signed-off-by: Yinbo Zhu --- Change in v2: 1. Add description and type about the "id". 2. Make the filename was based on compatible. .../bindings/thermal/loongson2-thermal.yaml | 52 +++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 Documentation/devicetree/bindings/thermal/loongson2-thermal.yaml diff --git a/Documentation/devicetree/bindings/thermal/loongson2-thermal.yaml b/Documentation/devicetree/bindings/thermal/loongson2-thermal.yaml new file mode 100644 index 000000000000..2994ae3a56aa --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/loongson2-thermal.yaml @@ -0,0 +1,52 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/thermal/loongson2-thermal.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Thermal sensors on loongson2 SoCs + +maintainers: + - zhanghongchen + - Yinbo Zhu + +properties: + compatible: + const: loongson,loongson2-thermal + + reg: + maxItems: 1 + + id: + $ref: '//schemas/types.yaml#/definitions/uint32' + description: | + Specify the thermal sensor id. + minimum: 0 + maximum: 3 + + interrupts: + maxItems: 1 + + "#thermal-sensor-cells": + const: 1 + +required: + - compatible + - reg + - id + - interrupt-parent + - interrupts + - '#thermal-sensor-cells' + +additionalProperties: false + +examples: + - | + thermal: thermal@1fe01500 { + compatible = "loongson,loongson2-thermal"; + reg = <0 0x1fe01500 0 0x30>; + id = <0>; + interrupt-parent = <&icu>; + interrupts = <7>; + #thermal-sensor-cells = <1>; + }; From patchwork Wed Sep 21 01:56:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinbo Zhu X-Patchwork-Id: 12982972 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 888B2C6FA93 for ; Wed, 21 Sep 2022 01:56:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231593AbiIUB4W (ORCPT ); Tue, 20 Sep 2022 21:56:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48974 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230077AbiIUB4U (ORCPT ); Tue, 20 Sep 2022 21:56:20 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 5D56F7963E; Tue, 20 Sep 2022 18:56:18 -0700 (PDT) Received: from localhost.localdomain (unknown [10.180.13.64]) by localhost.localdomain (Coremail) with SMTP id AQAAf8DxReI3bypj2yYfAA--.51844S4; Wed, 21 Sep 2022 09:56:14 +0800 (CST) From: Yinbo Zhu To: "Rafael J . Wysocki" , Daniel Lezcano , Amit Kucheria , Zhang Rui , Rob Herring , Krzysztof Kozlowski , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: zhanghongchen , Yinbo Zhu Subject: [PATCH v2 3/3] thermal: loongson2: add thermal management support Date: Wed, 21 Sep 2022 09:56:05 +0800 Message-Id: <20220921015605.17078-3-zhuyinbo@loongson.cn> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20220921015605.17078-1-zhuyinbo@loongson.cn> References: <20220921015605.17078-1-zhuyinbo@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8DxReI3bypj2yYfAA--.51844S4 X-Coremail-Antispam: 1UD129KBjvJXoW3Ww4UCrWUGrWxCryDtry3twb_yoWfWFWDpF W3J3y5GrsrGFsruwsrAr18CFs0vw12yF9xZFWxCw1Y9rWfJ343WryUJFy8ArWSkFyDGF13 ZrZ0kFWUCFWDW3DanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPG14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jryl82xGYIkIc2 x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v26F4UJVW0 owAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7 IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4U M4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2 kIc2xKxwCY02Avz4vE-syl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1l x2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14 v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IY x2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87 Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIF yTuYvjfUOJPEUUUUU X-CM-SenderInfo: 52kx5xhqerqz5rrqw2lrqou0/ Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org This patch adds the support for loongson2 thermal sensor controller, which can support maximum 4 sensors. It's based on thermal of framework: - Trip points defined in device tree. - Cpufreq as cooling device registered in loongson2 cpufreq driver. - Pwm fan as cooling device registered in hwmon pwm-fan driver. Signed-off-by: zhanghongchen Signed-off-by: Yinbo Zhu --- Change in v2: 1. Remove error msg printing when addr ioremap has error. 2. Make loongson2 thermal driver was built-in by default. 3. Replace ls2k with loongson2. 4. Remove CONFIG_PM_SLEEP and set pm function type was __maybe_unused. drivers/thermal/Kconfig | 10 ++ drivers/thermal/Makefile | 1 + drivers/thermal/loongson2_thermal.c | 238 ++++++++++++++++++++++++++++ 3 files changed, 249 insertions(+) create mode 100644 drivers/thermal/loongson2_thermal.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index e052dae614eb..6b60397e96a1 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 LOONGSON2_THERMAL + tristate "Loongson2 SOC series thermal driver" + depends on OF + default y + help + Support for Thermal driver found on Loongson2 SOC series platforms. + It supports one critical trip point and one passive trip point. The + cpufreq and the pwm fan is used as the cooling device to throttle + CPUs when the passive trip is crossed. + endif diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index def8e1a0399c..e99f839126fa 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_LOONGSON2_THERMAL) += loongson2_thermal.o diff --git a/drivers/thermal/loongson2_thermal.c b/drivers/thermal/loongson2_thermal.c new file mode 100644 index 000000000000..d685c2ab1c0a --- /dev/null +++ b/drivers/thermal/loongson2_thermal.c @@ -0,0 +1,238 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Author: zhanghongchen + * Yinbo Zhu + * Copyright (C) 2022-2023 Loongson Technology Corporation Limited + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "thermal_hwmon.h" + +#define LOONGSON2_SOC_DEFAULT_SENSOR 0 +#define LOONGSON2_SOC_MAX_SENSOR_NUM 4 + +#define LOONGSON2_TSENSOR_CTRL_HI 0x0 +#define LOONGSON2_TSENSOR_CTRL_LO 0x8 +#define LOONGSON2_TSENSOR_STATUS 0x10 +#define LOONGSON2_TSENSOR_OUT 0x14 + +struct loongson2_thermal_data { + struct thermal_zone_device *tzd; + int irq; + int id; + void __iomem *regs; + struct platform_device *pdev; + u16 ctrl_low_val; + u16 ctrl_hi_val; +}; + +/** + * @low : temperature in degree + * @high: temperature in degree + */ +static int loongson2_thermal_set(struct loongson2_thermal_data *data, + int low, int high, bool enable) +{ + u64 reg_ctrl = 0; + int reg_off = data->id * 2; + + if (low > high) + return -EINVAL; + + low = low < -100 ? -100 : low; + high = high > 155 ? 155 : high; + + low += 100; + high += 100; + + reg_ctrl |= low; + reg_ctrl |= enable ? 0x100 : 0; + writew(reg_ctrl, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); + + reg_ctrl = 0; + reg_ctrl |= high; + reg_ctrl |= enable ? 0x100 : 0; + writew(reg_ctrl, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); + + return 0; +} + +static int loongson2_thermal_get_temp(void *__data, int *temp) +{ + struct loongson2_thermal_data *data = __data; + u32 reg_val; + + reg_val = readl(data->regs + LOONGSON2_TSENSOR_OUT); + *temp = ((reg_val & 0xff) - 100) * 1000; + + return 0; +} + +static irqreturn_t loongson2_thermal_alarm_irq(int irq, void *dev) +{ + struct loongson2_thermal_data *data = dev; + + /* clear interrupt */ + writeb(0x3, data->regs + LOONGSON2_TSENSOR_STATUS); + + disable_irq_nosync(irq); + + return IRQ_WAKE_THREAD; +} + +static irqreturn_t loongson2_thermal_irq_thread(int irq, void *dev) +{ + struct loongson2_thermal_data *data = dev; + + thermal_zone_device_update(data->tzd, + THERMAL_EVENT_UNSPECIFIED); + enable_irq(data->irq); + + return IRQ_HANDLED; +} + +static int loongson2_thermal_set_trips(void *data, int low, int high) +{ + return loongson2_thermal_set(data, low/1000, high/1000, true); +} + +static const struct thermal_zone_of_device_ops loongson2_of_thermal_ops = { + .get_temp = loongson2_thermal_get_temp, + .set_trips = loongson2_thermal_set_trips, +}; + +static int loongson2_thermal_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *res; + struct loongson2_thermal_data *data; + int ret; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->pdev = pdev; + platform_set_drvdata(pdev, data); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->regs = devm_ioremap(dev, res->start, resource_size(res)); + if (IS_ERR(data->regs)) + return PTR_ERR(data->regs); + + /* get irq */ + data->irq = platform_get_irq(pdev, 0); + if (data->irq < 0) + return data->irq; + + /* get id */ + if (of_property_read_u32(dev->of_node, "id", &data->id)) { + dev_err(dev, "not found id property!\n"); + data->id = LOONGSON2_SOC_DEFAULT_SENSOR; + } + + if (data->id > LOONGSON2_SOC_MAX_SENSOR_NUM - 1) { + dev_err(dev, "sensor id error,must be in <0 ~ %d>\n", + LOONGSON2_SOC_MAX_SENSOR_NUM - 1); + return -EINVAL; + } + + writeb(0xff, data->regs + LOONGSON2_TSENSOR_STATUS); + + loongson2_thermal_set(data, 0, 0, false); + + data->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, + data->id, data, + &loongson2_of_thermal_ops); + if (IS_ERR(data->tzd)) { + ret = PTR_ERR(data->tzd); + data->tzd = NULL; + dev_err(&pdev->dev, "failed to register %d\n", ret); + return ret; + } + + ret = devm_request_threaded_irq(dev, data->irq, + loongson2_thermal_alarm_irq, loongson2_thermal_irq_thread, + IRQF_ONESHOT, "loongson2_thermal", data); + if (ret < 0) { + dev_err(dev, "failed to request alarm irq: %d\n", ret); + return ret; + } + + /* + * Thermal_zone doesn't enable hwmon as default, + * enable it here + */ + data->tzd->tzp->no_hwmon = false; + ret = thermal_add_hwmon_sysfs(data->tzd); + if (ret) { + dev_err(dev, "failed to add hwmon sysfs interface %d\n", ret); + return ret; + } + + return 0; +} + +int loongson2_thermal_remove(struct platform_device *pdev) +{ + struct loongson2_thermal_data *data = platform_get_drvdata(pdev); + int reg_off = data->id * 2; + + /* disable interrupt */ + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); + + return 0; +} + +static const struct of_device_id of_loongson2_thermal_match[] = { + { .compatible = "loongson,loongson2-thermal",}, + { /* end */ } +}; +MODULE_DEVICE_TABLE(of, of_loongson2_thermal_match); + +static int __maybe_unused loongson2_thermal_suspend(struct device *dev) +{ + struct loongson2_thermal_data *data = dev_get_drvdata(dev); + int reg_off = data->id * 2; + + data->ctrl_low_val = readw(data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); + data->ctrl_hi_val = readw(data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); + + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); + + return 0; +} + +static int __maybe_unused loongson2_thermal_resume(struct device *dev) +{ + struct loongson2_thermal_data *data = dev_get_drvdata(dev); + int reg_off = data->id * 2; + + writew(data->ctrl_low_val, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); + writew(data->ctrl_hi_val, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(loongson2_thermal_pm_ops, + loongson2_thermal_suspend, loongson2_thermal_resume); + +static struct platform_driver loongson2_thermal_driver = { + .driver = { + .name = "loongson2_thermal", + .pm = &loongson2_thermal_pm_ops, + .of_match_table = of_loongson2_thermal_match, + }, + .probe = loongson2_thermal_probe, + .remove = loongson2_thermal_remove, +}; +module_platform_driver(loongson2_thermal_driver);