From patchwork Thu Jul 1 13:13:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qing Zhang X-Patchwork-Id: 12354113 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18D8AC11F64 for ; Thu, 1 Jul 2021 13:14:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D4222601FC for ; Thu, 1 Jul 2021 13:14:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236603AbhGANQm (ORCPT ); Thu, 1 Jul 2021 09:16:42 -0400 Received: from mail.loongson.cn ([114.242.206.163]:40240 "EHLO loongson.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S236567AbhGANQl (ORCPT ); Thu, 1 Jul 2021 09:16:41 -0400 Received: from localhost.localdomain (unknown [113.200.148.30]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxf0OZv91gKz8bAA--.11066S2; Thu, 01 Jul 2021 21:14:02 +0800 (CST) From: Qing Zhang To: Thomas Bogendoerfer , Rob Herring , Jiaxun Yang Cc: Sergei Shtylyov , devicetree@vger.kernel.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v8 1/3] MIPS: Loongson64: Add Loongson-2K1000 reset platform driver Date: Thu, 1 Jul 2021 21:13:58 +0800 Message-Id: <20210701131400.4699-1-zhangqing@loongson.cn> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 X-CM-TRANSID: AQAAf9Dxf0OZv91gKz8bAA--.11066S2 X-Coremail-Antispam: 1UD129KBjvJXoWxAFW3tw4fAw18Zr1DAw48Crg_yoW5Wry5pF Z8Cw43Ar4rWa12gw4fJFyUuFW5Zwn3tFWUuFy2v34UZas8WFZ5J3WUta4FvF9rWr17JFWa qrsYqFW5CF4F9w7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUvlb7Iv0xC_Kw4lb4IE77IF4wAFF20E14v26r4j6ryUM7CY07I2 0VC2zVCF04k26cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rw A2F7IY1VAKz4vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xII jxv20xvEc7CjxVAFwI0_Cr0_Gr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I 8E87Iv6xkF7I0E14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI 64kE6c02F40Ex7xfMcIj64x0Y40En7xvr7AKxVWUJVW8JwAv7VC0I7IYx2IY67AKxVWUAV WUtwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAK I48JMxkIecxEwVAFwVW5GwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8Jw C20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAF wI0_JF0_Jw1lIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjx v20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF04k26cxKx2IYs7xG6rWUJVWrZr1UMIIF0xvE x4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvj DU0xZFpf9x07b2a0PUUUUU= X-CM-SenderInfo: x2kd0wptlqwqxorr0wxvrqhubq/ Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Add power management register operations to support reboot and poweroff. Signed-off-by: Qing Zhang --- v7-v8: delete unnecessary pointer casts --- drivers/platform/mips/Kconfig | 6 ++++ drivers/platform/mips/Makefile | 1 + drivers/platform/mips/ls2k-reset.c | 53 ++++++++++++++++++++++++++++++ 3 files changed, 60 insertions(+) create mode 100644 drivers/platform/mips/ls2k-reset.c diff --git a/drivers/platform/mips/Kconfig b/drivers/platform/mips/Kconfig index 8ac149173c64..d421e1482395 100644 --- a/drivers/platform/mips/Kconfig +++ b/drivers/platform/mips/Kconfig @@ -30,4 +30,10 @@ config RS780E_ACPI help Loongson RS780E PCH ACPI Controller driver. +config LS2K_RESET + bool "Loongson-2K1000 Reset Controller" + depends on MACH_LOONGSON64 || COMPILE_TEST + help + Loongson-2K1000 Reset Controller driver. + endif # MIPS_PLATFORM_DEVICES diff --git a/drivers/platform/mips/Makefile b/drivers/platform/mips/Makefile index 178149098777..4c71444e453a 100644 --- a/drivers/platform/mips/Makefile +++ b/drivers/platform/mips/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_CPU_HWMON) += cpu_hwmon.o obj-$(CONFIG_RS780E_ACPI) += rs780e-acpi.o +obj-$(CONFIG_LS2K_RESET) += ls2k-reset.o diff --git a/drivers/platform/mips/ls2k-reset.c b/drivers/platform/mips/ls2k-reset.c new file mode 100644 index 000000000000..b70e7b8a092c --- /dev/null +++ b/drivers/platform/mips/ls2k-reset.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021, Qing Zhang + * Loongson-2K1000 reset support + */ + +#include +#include +#include + +#define PM1_STS 0x0c /* Power Management 1 Status Register */ +#define PM1_CNT 0x14 /* Power Management 1 Control Register */ +#define RST_CNT 0x30 /* Reset Control Register */ + +static void __iomem *base; + +static void ls2k_restart(char *command) +{ + writel(0x1, base + RST_CNT); +} + +static void ls2k_poweroff(void) +{ + /* Clear */ + writel((readl(base + PM1_STS) & 0xffffffff), base + PM1_STS); + /* Sleep Enable | Soft Off*/ + writel(GENMASK(12, 10) | BIT(13), base + PM1_CNT); +} + +static int ls2k_reset_init(void) +{ + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "loongson,ls2k-pm"); + if (!np) { + pr_info("Failed to get PM node\n"); + return -ENODEV; + } + + base = of_iomap(np, 0); + if (!base) { + pr_info("Failed to map PM register base address\n"); + return -ENOMEM; + } + + _machine_restart = ls2k_restart; + pm_power_off = ls2k_poweroff; + + of_node_put(np); + return 0; +} + +arch_initcall(ls2k_reset_init);