From patchwork Fri Jul 28 07:49:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinbo Zhu X-Patchwork-Id: 127410 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:918b:0:b0:3e4:2afc:c1 with SMTP id s11csp273447vqg; Fri, 28 Jul 2023 01:08:41 -0700 (PDT) X-Google-Smtp-Source: APBJJlFGolURHgXvGus2LFlBcMPw/r7dGdoypdk3Ajuto4dU3OePrJxNqozWoQJxMNYnuknb63/V X-Received: by 2002:a17:907:2711:b0:99b:5a73:4d09 with SMTP id w17-20020a170907271100b0099b5a734d09mr1268888ejk.43.1690531721449; Fri, 28 Jul 2023 01:08:41 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690531721; cv=none; d=google.com; s=arc-20160816; b=TDUnpJJKAHtcKRHUEEa+5GUaQM8a8AFwadjv41+thFKDrzH9hmPmCCA73DnCcs72HU MiygGMYmlTFlF/WQ8CUvqDDNeHKgNYzuOLMSYKJeXlK5keUQbZgNNAhzNeaRLuvFCOso 1mBdcnSB6zfO6HFao3Z6nte1XO/rPEp2clh9f1Aq7RtiYuzhr0Eu5O9j5RlqtD2JEnz1 Om3vxIohCZgP6QjXa8IJz/I+8eNL6prQVG8WLcvsnBh8DGr2I71ds7Ptb0f4KfofEfPQ F7AVE2u/0fRKEywEvOF9TP+9hKhY2ispsRMnIj3GnLYZca5cffTKex42tvQ5CsIkJ77r VVaw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=xcV0ipVslahvM070ZaDhT4GcHIJLM4QsbOOUd2yXKQ0=; fh=DTuk6cBr3q9fmRYJv+WJWLTjjvYxEASA5XKeCOrarKk=; b=gyeCJK+ifCYtgdT7ldih/aEhIaQR2iaEhVVZ+6h+CnHEfmvIUni6S4ud6mQNlOwg2q zeRdQ1z5Rg6WWvIbhfw1PDarJkE6F6SZaNhU14doBuTvL+iAcReOa9oTXcUp7+zFIi3o NFK5rEDCAV6KJdoBCX8C9Zi3k7BMRM0sMdusl8yI8oVnwkXU3DAxF+qSIZqYbIGiym2y tK57J7JrqVe6W4rnk1GG8q4ATdCs0C2UB8oonXzKK0jUUxx7YT6kT9qcEO+vFE+jf5yy d8VY21mB/QKXiKAjvzpBurMQcG8AtXPpdo9okhP7myEWkh6s9/otGPDPBX3mDuyicvoU PoSg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id f13-20020a170906494d00b00987a43ee395si2355981ejt.741.2023.07.28.01.08.17; Fri, 28 Jul 2023 01:08:41 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234457AbjG1HuE (ORCPT + 99 others); Fri, 28 Jul 2023 03:50:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37448 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234445AbjG1HuA (ORCPT ); Fri, 28 Jul 2023 03:50:00 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id D7A8B30E0; Fri, 28 Jul 2023 00:49:58 -0700 (PDT) Received: from loongson.cn (unknown [10.20.42.201]) by gateway (Coremail) with SMTP id _____8Dx6eokc8NkijsLAA--.22411S3; Fri, 28 Jul 2023 15:49:56 +0800 (CST) Received: from localhost.localdomain (unknown [10.20.42.201]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Dx4eQbc8NkiQA+AA--.34001S3; Fri, 28 Jul 2023 15:49:53 +0800 (CST) From: Yinbo Zhu To: Arnd Bergmann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jianmin Lv , wanghongliang@loongson.cn, Liu Peibao , loongson-kernel@lists.loongnix.cn, Yinbo Zhu , Liu Yun , Krzysztof Kozlowski Subject: [PATCH v5 1/2] soc: dt-bindings: add loongson-2 pm Date: Fri, 28 Jul 2023 15:49:43 +0800 Message-Id: <20230728074944.26746-2-zhuyinbo@loongson.cn> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20230728074944.26746-1-zhuyinbo@loongson.cn> References: <20230728074944.26746-1-zhuyinbo@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8Dx4eQbc8NkiQA+AA--.34001S3 X-CM-SenderInfo: 52kx5xhqerqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1772650990528967971 X-GMAIL-MSGID: 1772650990528967971 Add the Loongson-2 SoC Power Management Controller binding with DT schema format using json-schema. Signed-off-by: Yinbo Zhu Reviewed-by: Krzysztof Kozlowski --- .../soc/loongson/loongson,ls2k-pmc.yaml | 52 +++++++++++++++++++ MAINTAINERS | 6 +++ 2 files changed, 58 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/loongson/loongson,ls2k-pmc.yaml diff --git a/Documentation/devicetree/bindings/soc/loongson/loongson,ls2k-pmc.yaml b/Documentation/devicetree/bindings/soc/loongson/loongson,ls2k-pmc.yaml new file mode 100644 index 000000000000..da2dcfeebf12 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/loongson/loongson,ls2k-pmc.yaml @@ -0,0 +1,52 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/soc/loongson/loongson,ls2k-pmc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Loongson-2 Power Manager controller + +maintainers: + - Yinbo Zhu + +properties: + compatible: + items: + - enum: + - loongson,ls2k0500-pmc + - loongson,ls2k1000-pmc + - const: syscon + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + loongson,suspend-address: + $ref: /schemas/types.yaml#/definitions/uint64 + description: + The "loongson,suspend-address" is a deep sleep state (Suspend To + RAM) firmware entry address which was jumped from kernel and it's + value was dependent on specific platform firmware code. In + addition, the PM need according to it to indicate that current + SoC whether support Suspend To RAM. + +required: + - compatible + - reg + - interrupts + +additionalProperties: false + +examples: + - | + #include + + power-management@1fe27000 { + compatible = "loongson,ls2k1000-pmc", "syscon"; + reg = <0x1fe27000 0x58>; + interrupt-parent = <&liointc1>; + interrupts = <11 IRQ_TYPE_LEVEL_LOW>; + loongson,suspend-address = <0x0 0x1c000500>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 7a91f14cad2e..bcd05f1fa5c1 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12190,6 +12190,12 @@ S: Maintained F: Documentation/devicetree/bindings/hwinfo/loongson,ls2k-chipid.yaml F: drivers/soc/loongson/loongson2_guts.c +LOONGSON-2 SOC SERIES PM DRIVER +M: Yinbo Zhu +L: linux-pm@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/soc/loongson/loongson,ls2k-pmc.yaml + LOONGSON-2 SOC SERIES PINCTRL DRIVER M: zhanghongchen M: Yinbo Zhu From patchwork Fri Jul 28 07:49:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinbo Zhu X-Patchwork-Id: 127411 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:918b:0:b0:3e4:2afc:c1 with SMTP id s11csp273819vqg; Fri, 28 Jul 2023 01:09:28 -0700 (PDT) X-Google-Smtp-Source: APBJJlELg9K9u1CDhmlqpGSkewrzdj6LMoYwL7xdUX+SvNYaGMfz50GdIddne6ordvRYp0XflJJW X-Received: by 2002:a17:906:51d7:b0:99b:627f:9c0d with SMTP id v23-20020a17090651d700b0099b627f9c0dmr1404484ejk.27.1690531768650; Fri, 28 Jul 2023 01:09:28 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690531768; cv=none; d=google.com; s=arc-20160816; b=lFBDDQclIyZaxxwSrNg+S5SrnmFg6hItQ/LS8zd8dhKEx6FnuQg6HVPBOJdE38Pk0D QKdCScpjHF0DZ1rhGRARgI2nwhHB4vLXmZkIB9eLXTP6goOI5L9Uq6lLtg5wSwCgMj2d 3m49lKo53XQdb05Dl4mOWFo+P8ye/I8cWpwkeWaPJFTwXBL43ad3PsysiE3a2pG+S0tY /lKimWSgmzrvKsTpmo9MAPqCT+RU/gEV+8HjNi+a5J4HLUp9wTgHuLY1h9EOuZSmQsFd Y4Wj3PNeFr20O/Z+K56AYu4jRFycUykr0g7N0U8jJ7sUyoL8GYLcMg+PMYANlmBfNBgY DsDg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=sc2iTuxJQH6NYl+lQaPPyvZP4Ro7kqjCUNnSPsD85qE=; fh=GFNH2kwX0P1hdGVSRsHQBGvzF0wKvBygsPtNX3whwZY=; b=xJ192/W0axMmW74sjT4rP7u7ZwEatZsNLbtHbDG6KIXblf42ibCe9lw+2nj9Y0K5cs HKcbcxShAvwNkE0M3c6D9ogkhH2BdC5i5dyORZZLy0Q8DlVgOhOPg8b5iFjLjlyByxDM zpzY09DaibOLuDLNw2WvfGoYYnS3xHT9xFRfsUhECtQlcpxD0oqk7uTnAgUiu5IpP4gF XBUUC9Hmr8RGcsaZzHMNOxY2B+xoE0pvuHu+KiJcVcHMVn+OiyiMFXmSEOHDt53XdVRD M0LNpWTkOQ0MqGAKQgaQB79Y4Ht+GxYPigC85mZEI+s7hzQY+uotE4XdUojCS9iTmi69 aN/A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id v14-20020a170906858e00b009930c0374basi2433557ejx.632.2023.07.28.01.09.03; Fri, 28 Jul 2023 01:09:28 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234485AbjG1HuK (ORCPT + 99 others); Fri, 28 Jul 2023 03:50:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37450 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234446AbjG1HuB (ORCPT ); Fri, 28 Jul 2023 03:50:01 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 053CB30E1; Fri, 28 Jul 2023 00:49:58 -0700 (PDT) Received: from loongson.cn (unknown [10.20.42.201]) by gateway (Coremail) with SMTP id _____8DxBfElc8NkjzsLAA--.27846S3; Fri, 28 Jul 2023 15:49:57 +0800 (CST) Received: from localhost.localdomain (unknown [10.20.42.201]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Dx4eQbc8NkiQA+AA--.34001S4; Fri, 28 Jul 2023 15:49:55 +0800 (CST) From: Yinbo Zhu To: Arnd Bergmann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jianmin Lv , wanghongliang@loongson.cn, Liu Peibao , loongson-kernel@lists.loongnix.cn, Yinbo Zhu , Liu Yun Subject: [PATCH v5 2/2] soc: loongson2_pm: add power management support Date: Fri, 28 Jul 2023 15:49:44 +0800 Message-Id: <20230728074944.26746-3-zhuyinbo@loongson.cn> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20230728074944.26746-1-zhuyinbo@loongson.cn> References: <20230728074944.26746-1-zhuyinbo@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8Dx4eQbc8NkiQA+AA--.34001S4 X-CM-SenderInfo: 52kx5xhqerqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1772651014868172310 X-GMAIL-MSGID: 1772651039921464565 The Loongson-2's power management controller was ACPI, supports ACPI S2Idle (Suspend To Idle), ACPI S3 (Suspend To RAM), ACPI S4 (Suspend To Disk), ACPI S5 (Soft Shutdown) and supports multiple wake-up methods (USB, GMAC, PWRBTN, etc.). This driver was to add power management controller support that base on dts for Loongson-2 series SoCs. Co-developed-by: Liu Yun Signed-off-by: Liu Yun Co-developed-by: Liu Peibao Signed-off-by: Liu Peibao Signed-off-by: Yinbo Zhu --- MAINTAINERS | 1 + drivers/soc/loongson/Kconfig | 10 ++ drivers/soc/loongson/Makefile | 1 + drivers/soc/loongson/loongson2_pm.c | 215 ++++++++++++++++++++++++++++ 4 files changed, 227 insertions(+) create mode 100644 drivers/soc/loongson/loongson2_pm.c diff --git a/MAINTAINERS b/MAINTAINERS index bcd05f1fa5c1..7c4ad0cbaeff 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12195,6 +12195,7 @@ M: Yinbo Zhu L: linux-pm@vger.kernel.org S: Maintained F: Documentation/devicetree/bindings/soc/loongson/loongson,ls2k-pmc.yaml +F: drivers/soc/loongson/loongson2_pm.c LOONGSON-2 SOC SERIES PINCTRL DRIVER M: zhanghongchen diff --git a/drivers/soc/loongson/Kconfig b/drivers/soc/loongson/Kconfig index 707f56358dc4..4f3ce9eb7520 100644 --- a/drivers/soc/loongson/Kconfig +++ b/drivers/soc/loongson/Kconfig @@ -16,3 +16,13 @@ config LOONGSON2_GUTS SoCs. Initially only reading SVR and registering soc device are supported. Other guts accesses, such as reading firmware configuration by default, should eventually be added into this driver as well. + +config LOONGSON2_PM + bool "Loongson-2 SoC Power Management Controller Driver" + depends on LOONGARCH && OF + help + The Loongson-2's power management controller was ACPI, supports ACPI + S2Idle (Suspend To Idle), ACPI S3 (Suspend To RAM), ACPI S4 (Suspend To + Disk), ACPI S5 (Soft Shutdown) and supports multiple wake-up methods + (USB, GMAC, PWRBTN, etc.). This driver was to add power management + controller support that base on dts for Loongson-2 series SoCs. diff --git a/drivers/soc/loongson/Makefile b/drivers/soc/loongson/Makefile index 263c486df638..4118f50f55e2 100644 --- a/drivers/soc/loongson/Makefile +++ b/drivers/soc/loongson/Makefile @@ -4,3 +4,4 @@ # obj-$(CONFIG_LOONGSON2_GUTS) += loongson2_guts.o +obj-$(CONFIG_LOONGSON2_PM) += loongson2_pm.o diff --git a/drivers/soc/loongson/loongson2_pm.c b/drivers/soc/loongson/loongson2_pm.c new file mode 100644 index 000000000000..796add6e8b63 --- /dev/null +++ b/drivers/soc/loongson/loongson2_pm.c @@ -0,0 +1,215 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Loongson-2 PM Support + * + * Copyright (C) 2023 Loongson Technology Corporation Limited + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define LOONGSON2_PM1_CNT_REG 0x14 +#define LOONGSON2_PM1_STS_REG 0x0c +#define LOONGSON2_PM1_ENA_REG 0x10 +#define LOONGSON2_GPE0_STS_REG 0x28 +#define LOONGSON2_GPE0_ENA_REG 0x2c + +#define LOONGSON2_PM1_PWRBTN_STS BIT(8) +#define LOONGSON2_PM1_PCIEXP_WAKE_STS BIT(14) +#define LOONGSON2_PM1_WAKE_STS BIT(15) +#define LOONGSON2_PM1_CNT_INT_EN BIT(0) +#define LOONGSON2_PM1_PWRBTN_EN LOONGSON2_PM1_PWRBTN_STS + +static struct loongson2_pm { + void __iomem *base; + struct input_dev *dev; + bool suspended; +} loongson2_pm; + +#define loongson2_pm_readw(reg) readw(loongson2_pm.base + reg) +#define loongson2_pm_readl(reg) readl(loongson2_pm.base + reg) +#define loongson2_pm_writew(val, reg) writew(val, loongson2_pm.base + reg) +#define loongson2_pm_writel(val, reg) writel(val, loongson2_pm.base + reg) + +static void loongson2_pm_status_clear(void) +{ + u16 value; + + value = loongson2_pm_readw(LOONGSON2_PM1_STS_REG); + value |= (LOONGSON2_PM1_PWRBTN_STS | LOONGSON2_PM1_PCIEXP_WAKE_STS | + LOONGSON2_PM1_WAKE_STS); + loongson2_pm_writew(value, LOONGSON2_PM1_STS_REG); + loongson2_pm_writel(loongson2_pm_readl(LOONGSON2_GPE0_STS_REG), LOONGSON2_GPE0_STS_REG); +} + +static void loongson2_pm_irq_enable(void) +{ + u16 value; + + value = loongson2_pm_readw(LOONGSON2_PM1_CNT_REG); + value |= LOONGSON2_PM1_CNT_INT_EN; + loongson2_pm_writew(value, LOONGSON2_PM1_CNT_REG); + + value = loongson2_pm_readw(LOONGSON2_PM1_ENA_REG); + value |= LOONGSON2_PM1_PWRBTN_EN; + loongson2_pm_writew(value, LOONGSON2_PM1_ENA_REG); +} + +static int loongson2_suspend_enter(suspend_state_t state) +{ + loongson2_pm_status_clear(); + loongarch_common_suspend(); + loongarch_suspend_enter(); + loongarch_common_resume(); + loongson2_pm_irq_enable(); + pm_set_resume_via_firmware(); + + return 0; +} + +static int loongson2_suspend_begin(suspend_state_t state) +{ + pm_set_suspend_via_firmware(); + + return 0; +} + +static int loongson2_suspend_valid_state(suspend_state_t state) +{ + return (state == PM_SUSPEND_MEM); +} + +static const struct platform_suspend_ops loongson2_suspend_ops = { + .valid = loongson2_suspend_valid_state, + .begin = loongson2_suspend_begin, + .enter = loongson2_suspend_enter, +}; + +static int loongson2_power_button_init(struct device *dev, int irq) +{ + int ret; + struct input_dev *button; + + button = input_allocate_device(); + if (!dev) + return -ENOMEM; + + button->name = "Power Button"; + button->phys = "pm/button/input0"; + button->id.bustype = BUS_HOST; + button->dev.parent = NULL; + input_set_capability(button, EV_KEY, KEY_POWER); + + ret = input_register_device(button); + if (ret) + goto free_dev; + + dev_pm_set_wake_irq(&button->dev, irq); + device_set_wakeup_capable(&button->dev, true); + device_set_wakeup_enable(&button->dev, true); + + loongson2_pm.dev = button; + dev_info(dev, "Power Button: Init successful!\n"); + + return 0; + +free_dev: + input_free_device(button); + + return ret; +} + +static irqreturn_t loongson2_pm_irq_handler(int irq, void *dev_id) +{ + u16 status = loongson2_pm_readw(LOONGSON2_PM1_STS_REG); + + if (!loongson2_pm.suspended && (status & LOONGSON2_PM1_PWRBTN_STS)) { + pr_info("Power Button pressed...\n"); + input_report_key(loongson2_pm.dev, KEY_POWER, 1); + input_sync(loongson2_pm.dev); + input_report_key(loongson2_pm.dev, KEY_POWER, 0); + input_sync(loongson2_pm.dev); + } + + loongson2_pm_status_clear(); + + return IRQ_HANDLED; +} + +static int __maybe_unused loongson2_pm_suspend(struct device *dev) +{ + loongson2_pm.suspended = true; + + return 0; +} + +static int __maybe_unused loongson2_pm_resume(struct device *dev) +{ + loongson2_pm.suspended = false; + + return 0; +} +static SIMPLE_DEV_PM_OPS(loongson2_pm_ops, loongson2_pm_suspend, loongson2_pm_resume); + +static int loongson2_pm_probe(struct platform_device *pdev) +{ + int irq, retval; + u64 suspend_addr; + struct device *dev = &pdev->dev; + + loongson2_pm.base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(loongson2_pm.base)) + return PTR_ERR(loongson2_pm.base); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + if (!device_property_read_u64(dev, "loongson,suspend-address", &suspend_addr)) + loongson_sysconf.suspend_addr = (u64)phys_to_virt(suspend_addr); + else + dev_err(dev, "No loongson,suspend-address, could not support S3!\n"); + + if (loongson2_power_button_init(dev, irq)) + return -EINVAL; + + retval = devm_request_irq(&pdev->dev, irq, loongson2_pm_irq_handler, + IRQF_SHARED, "pm_irq", &loongson2_pm); + if (retval) + return retval; + + loongson2_pm_irq_enable(); + loongson2_pm_status_clear(); + + if (loongson_sysconf.suspend_addr) + suspend_set_ops(&loongson2_suspend_ops); + + return 0; +} + +static const struct of_device_id loongson2_pm_match[] = { + { .compatible = "loongson,ls2k0500-pmc", }, + { .compatible = "loongson,ls2k1000-pmc", }, + {}, +}; + +static struct platform_driver loongson2_pm_driver = { + .driver = { + .name = "ls2k-pm", + .pm = &loongson2_pm_ops, + .of_match_table = loongson2_pm_match, + }, + .probe = loongson2_pm_probe, +}; +module_platform_driver(loongson2_pm_driver); + +MODULE_DESCRIPTION("Loongson-2 PM driver"); +MODULE_LICENSE("GPL");