From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2E6F1CCF9E9 for ; Sun, 26 Oct 2025 22:45:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=sGA3vnU1mtzEMaOfO+YqSFYp3ye3HCSVMkPxcAVNtYY=; b=3mI3lZyHLdGBtu XwVrktt7XJy1wsjKpoBzV0I6vm9dLYLrf7iMQxegDD/Mhdd8Ak0ciPIf5EMIGqzliG1i+jjdFH/+U GhhBucRf5wFDTj3QuEYK/Y3vDhrk32O70yHc5Jtd8rN0YWsya7FH2ItjB8rKTrg69SXSIX9zZWESu UbpY4BNgWDH/PhE3jjSWW9Q/BCHf5WGOl1nAVpLMIz7g9OECfKnkBfR+nabNEZ0gBjX7jXvB7kJOl z9J6H4FlyEDMd+YVg6H5q9EzDP/oeVSfWT3OxJQdFqR8moaNLN2553qMTozlqi5jCzR1wpuNMMdWB sEttEkXTDUVsx11xnKpA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vD9Tx-0000000CpBR-0Uw5; Sun, 26 Oct 2025 22:45:01 +0000 Received: from hall.aurel32.net ([2001:bc8:30d7:100::1]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vD9Tr-0000000Cp9i-3WZ7 for linux-riscv@lists.infradead.org; Sun, 26 Oct 2025 22:44:58 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=aurel32.net ; s=202004.hall; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Content-Type:From:Reply-To: Subject:Content-ID:Content-Description:X-Debbugs-Cc; bh=upuvDJ4uHcxGhtGccy6wLQYNYBh7CDWGSkmRMwmBkeQ=; b=KpciAmJ2X1ae/s3WQG+HnrqApw obxX0S9zBigyEP8PYi/N5g/E3TwI6A8gpAs/pxmzD8ZdjJBs4n8Thuv9CAlKQpHo1vUYvNehhrV9D el2HQXIWvp6vKZacsDc1W7rHVLDYnMkNhI6Yu3XFSXQgZKqHQxuuOzOAHufynpAbA5bUm+Yv1a7to LMPxX4bGzqaCFK71f54eZ6yryniLLKY29hc3s3Gt9zy2Zv0Cc83Xl1V0N1UCLmOgQk1j8KwqEJk9H PXrUONlzS669Q6IzRrFXq2ilzte7OvGXon9rlrQbYHiC4eOX8viDlSfrD4iCOUbrZtyclblKyOKsU uZ5b5oWg==; Received: from [2a01:e34:ec5d:a741:1ee1:92ff:feb4:5ec0] (helo=ohm.rr44.fr) by hall.aurel32.net with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vD9TV-0065U5-1b; Sun, 26 Oct 2025 23:44:33 +0100 From: Aurelien Jarno To: linux-kernel@vger.kernel.org, Lee Jones , Sebastian Reichel , Troy Mitchell , Yixun Lan , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , linux-riscv@lists.infradead.org (open list:RISC-V ARCHITECTURE:Keyword:riscv), spacemit@lists.linux.dev (open list:RISC-V SPACEMIT SoC Support:Keyword:spacemit), linux-pm@vger.kernel.org (open list:SYSTEM RESET/SHUTDOWN DRIVERS) Cc: Aurelien Jarno , linux-pm@vger.kernel.org (open list:SYSTEM RESET/SHUTDOWN DRIVERS), linux-riscv@lists.infradead.org (open list:RISC-V SPACEMIT SoC Support), spacemit@lists.linux.dev (open list:RISC-V SPACEMIT SoC Support) Subject: [PATCH v4 1/2] driver: reset: spacemit-p1: add driver for poweroff/reboot Date: Sun, 26 Oct 2025 23:41:14 +0100 Message-ID: <20251026224424.1891541-2-aurelien@aurel32.net> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20251026224424.1891541-1-aurelien@aurel32.net> References: <20251026224424.1891541-1-aurelien@aurel32.net> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251026_154456_337700_E9D455E8 X-CRM114-Status: GOOD ( 21.58 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org This driver implements poweroff/reboot support for the SpacemiT P1 PMIC chip, which is commonly paired with the SpacemiT K1 SoC. The SpacemiT P1 support is implemented as a MFD driver, so the access is done directly through the regmap interface. Reboot or poweroff is triggered by setting a specific bit in a control register, which is automatically cleared by the hardware afterwards. Signed-off-by: Aurelien Jarno --- v2: - Replace the "select" by a "depends on" - Remove outdated Reviewed-by drivers/power/reset/Kconfig | 9 +++ drivers/power/reset/Makefile | 1 + drivers/power/reset/spacemit-p1-reboot.c | 88 ++++++++++++++++++++++++ 3 files changed, 98 insertions(+) create mode 100644 drivers/power/reset/spacemit-p1-reboot.c diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index 8248895ca9038..61c16f3d5abc7 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -283,6 +283,15 @@ config POWER_RESET_KEYSTONE help Reboot support for the KEYSTONE SoCs. +config POWER_RESET_SPACEMIT_P1 + tristate "SpacemiT P1 poweroff and reset driver" + depends on ARCH_SPACEMIT || COMPILE_TEST + depends on MFD_SPACEMIT_P1 + default m + help + This driver supports power-off and reset operations for the SpacemiT + P1 PMIC. + config POWER_RESET_SYSCON bool "Generic SYSCON regmap reset driver" depends on OF diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 51da87e05ce76..0e4ae6f6b5c55 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o obj-$(CONFIG_POWER_RESET_REGULATOR) += regulator-poweroff.o obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o +obj-$(CONFIG_POWER_RESET_SPACEMIT_P1) += spacemit-p1-reboot.o obj-$(CONFIG_POWER_RESET_ST) += st-poweroff.o obj-$(CONFIG_POWER_RESET_TH1520_AON) += th1520-aon-reboot.o obj-$(CONFIG_POWER_RESET_TORADEX_EC) += tdx-ec-poweroff.o diff --git a/drivers/power/reset/spacemit-p1-reboot.c b/drivers/power/reset/spacemit-p1-reboot.c new file mode 100644 index 0000000000000..9ec3d1fff8f3d --- /dev/null +++ b/drivers/power/reset/spacemit-p1-reboot.c @@ -0,0 +1,88 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2025 by Aurelien Jarno + */ + +#include +#include +#include +#include +#include + +/* Power Control Register 2 */ +#define PWR_CTRL2 0x7e +#define PWR_CTRL2_SHUTDOWN BIT(2) /* Shutdown request */ +#define PWR_CTRL2_RST BIT(1) /* Reset request */ + +static int spacemit_p1_pwroff_handler(struct sys_off_data *data) +{ + struct regmap *regmap = data->cb_data; + int ret; + + /* Put the PMIC into shutdown state */ + ret = regmap_set_bits(regmap, PWR_CTRL2, PWR_CTRL2_SHUTDOWN); + if (ret) { + dev_err(data->dev, "shutdown failed: %d\n", ret); + return notifier_from_errno(ret); + } + + return NOTIFY_DONE; +} + +static int spacemit_p1_restart_handler(struct sys_off_data *data) +{ + struct regmap *regmap = data->cb_data; + int ret; + + /* Put the PMIC into reset state */ + ret = regmap_set_bits(regmap, PWR_CTRL2, PWR_CTRL2_RST); + if (ret) { + dev_err(data->dev, "restart failed: %d\n", ret); + return notifier_from_errno(ret); + } + + return NOTIFY_DONE; +} + +static int spacemit_p1_reboot_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct regmap *regmap; + int ret; + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + return -ENODEV; + + ret = devm_register_power_off_handler(dev, &spacemit_p1_pwroff_handler, + regmap); + if (ret) + return dev_err_probe(dev, ret, + "Failed to register power off handler\n"); + + ret = devm_register_restart_handler(dev, spacemit_p1_restart_handler, + regmap); + if (ret) + return dev_err_probe(dev, ret, + "Failed to register restart handler\n"); + + return 0; +} + +static const struct platform_device_id spacemit_p1_reboot_id_table[] = { + { "spacemit-p1-reboot", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(platform, spacemit_p1_reboot_id_table); + +static struct platform_driver spacemit_p1_reboot_driver = { + .driver = { + .name = "spacemit-p1-reboot", + }, + .probe = spacemit_p1_reboot_probe, + .id_table = spacemit_p1_reboot_id_table, +}; +module_platform_driver(spacemit_p1_reboot_driver); + +MODULE_DESCRIPTION("SpacemiT P1 reboot/poweroff driver"); +MODULE_LICENSE("GPL"); -- 2.47.2 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv