From patchwork Mon Jun 28 15:13:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qing Zhang X-Patchwork-Id: 12348207 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,URIBL_BLOCKED,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 C19DFC2B9F4 for ; Mon, 28 Jun 2021 15:15:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9463161459 for ; Mon, 28 Jun 2021 15:15:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235362AbhF1PSG (ORCPT ); Mon, 28 Jun 2021 11:18:06 -0400 Received: from mail.loongson.cn ([114.242.206.163]:36392 "EHLO loongson.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S235682AbhF1PQD (ORCPT ); Mon, 28 Jun 2021 11:16:03 -0400 Received: from localhost.localdomain (unknown [113.200.148.30]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxz0Ia59lgs88ZAA--.8919S2; Mon, 28 Jun 2021 23:13:30 +0800 (CST) From: Qing Zhang To: Thomas Bogendoerfer , Rob Herring , Jiaxun Yang , Huacai Chen Cc: devicetree@vger.kernel.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 1/2] MIPS: Loongson64: Add Loongson-2K1000 reset platform driver Date: Mon, 28 Jun 2021 23:13:29 +0800 Message-Id: <20210628151330.11952-1-zhangqing@loongson.cn> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 X-CM-TRANSID: AQAAf9Dxz0Ia59lgs88ZAA--.8919S2 X-Coremail-Antispam: 1UD129KBjvJXoWxCFy8WrWDXw4kCw17AF15twb_yoW5CF1rpF Z8Gw43Cr4rG3W7Kw4rtF1UuFW5Z3Z3tFWjkFW2v34UZ3sxWFZ8Jwn8tFyrArnrGrW7AFW3 ZFsYgFW8CF4ru3DanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUvab7Iv0xC_Kw4lb4IE77IF4wAFF20E14v26r4j6ryUM7CY07I2 0VC2zVCF04k26cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rw A2F7IY1VAKz4vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Jr0_JF4l84ACjcxK6xII jxv20xvEc7CjxVAFwI0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4 A2jsIEc7CjxVAFwI0_GcCE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IE w4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r4j6F4UMc vjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCY1x0262kKe7AKxVWUAVWUtwCY 02Avz4vE14v_XrWl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxV Aqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r12 6r1DMIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6x kF7I0E14v26r1j6r4UMIIF0xvE42xK8VAvwI8IcIk0rVWrJr0_WFyUJwCI42IY6I8E87Iv 67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyT uYvjxUkwvKUUUUU 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 --- v2-v3: -make reset support as a driver v3-v4: -Modify patch title Signed-off-by: Qing Zhang --- drivers/platform/mips/Kconfig | 6 +++ drivers/platform/mips/Makefile | 1 + drivers/platform/mips/ls2k-reset.c | 60 ++++++++++++++++++++++++++++++ 3 files changed, 67 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..c5f073c82c5e --- /dev/null +++ b/drivers/platform/mips/ls2k-reset.c @@ -0,0 +1,60 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021, Qing Zhang + * Loongson-2K1000 reset support + */ + +#include +#include +#include + +static char *pm_reg_name[] = {"pm1_sts", "pm1_cnt", "rst_cnt"}; + +static void __iomem *get_reg_byname(struct device_node *node, const char *name) +{ + int index = of_property_match_string(node, "reg-names", name); + + if (index < 0) + return NULL; + + return of_iomap(node, index); +} + +static void ls2k_restart(char *command) +{ + writel(0x1, (void *)pm_reg_name[2]); +} + +static void ls2k_poweroff(void) +{ + /* Clear */ + writel((readl((void *)pm_reg_name[0]) & 0xffffffff), (void *)pm_reg_name[0]); + /* Sleep Enable | Soft Off*/ + writel(GENMASK(12, 10)|BIT(13), (void *)pm_reg_name[1]); +} + +static int ls2k_reset_init(void) +{ + struct device_node *np; + int i; + + np = of_find_node_by_type(NULL, "power management"); + if (!np) { + pr_info("Failed to get PM node\n"); + return -ENODEV; + } + + for (i = 0; i < sizeof(pm_reg_name)/sizeof(char *); i++) { + pm_reg_name[i] = get_reg_byname(np, pm_reg_name[i]); + if (!pm_reg_name[i]) + iounmap(pm_reg_name[i]); + } + + _machine_restart = ls2k_restart; + pm_power_off = ls2k_poweroff; + + of_node_put(np); + return 0; +} + +arch_initcall(ls2k_reset_init);