From nobody Thu Oct 2 14:24:23 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 21D3C323F66; Tue, 16 Sep 2025 20:25:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758054326; cv=none; b=GKMt0T+X+JoOnxLH5hElDxJZ+Hy1KKG1Bd/mgyk/mh2w87nnQp0+ySGuZP1R5KUqPN/rudiBbOZWi/Vj3iBMtC2VJkR6vlPUr2WcCt+jMQCkoxl0a9SMDv2fPUx9BGdzI7BPCNsltECqFBSQPL2WGjzKrD3Y7JQ+6HsM2CZhaGs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758054326; c=relaxed/simple; bh=gQdj+jO5OwYIixP+cClgewhJqb0eZSY9VuHBGl/18WU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=W8WLSgb1Zh2Ri4eN/i1kqKxRVemDI8JgKu4V4gwtXq/p57XqbXRa8H6t5K4exGxfsxWkRnD101tKHRVZYYbbx+O+lH6LRTycHRoLylPCzlFDET+o1Hbz8cGcUdX73NK5USTATITX46KZIGeTVHYxxVvUU1Tcu2vlNEBGSNy6+Kw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=o1edpLyF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="o1edpLyF" Received: by smtp.kernel.org (Postfix) with ESMTPS id D1448C4CEFE; Tue, 16 Sep 2025 20:25:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758054325; bh=gQdj+jO5OwYIixP+cClgewhJqb0eZSY9VuHBGl/18WU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=o1edpLyFj5jxP8LHIX+jFCvGtEv5LIFI/FSqg1M15wy0SXuZffg2o/uIAP2QoS17I dBfEIgkeDRDLFtauo5sC4bYwgLky8VWwmoIlEdnzFCbA2FNRnrZt6tfGMsMRA/NLwt b0ZiYpWvTY1CldLM4pCvqdUKf0I4ze91LlkSoIdwjxorzZRqPM6eEXGtjk04ZCZZ/l 8/rRaFiXFi5Nd0PA7K8r4UvyrzrFwXz37OjY/oUIumiLJb+bMJoxta1zXAy8c+PoJv jR4j9iZz+7TvhvW2/y1QYoNxb51HCmqhEq3aEtsBZYyUFHMP7mWOl9WgZqOSeRS3KH T32/ntpYPfGzA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7395CAC59D; Tue, 16 Sep 2025 20:25:25 +0000 (UTC) From: Dang Huynh via B4 Relay Date: Wed, 17 Sep 2025 03:25:12 +0700 Subject: [PATCH 15/25] power: reset: Add basic power reset driver for RDA8810PL Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250917-rda8810pl-drivers-v1-15-9ca9184ca977@mainlining.org> References: <20250917-rda8810pl-drivers-v1-0-9ca9184ca977@mainlining.org> In-Reply-To: <20250917-rda8810pl-drivers-v1-0-9ca9184ca977@mainlining.org> To: Manivannan Sadhasivam , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Bartosz Golaszewski , Alexandre Belloni , Michael Turquette , Stephen Boyd , Philipp Zabel , Sebastian Reichel , Vinod Koul , Kees Cook , "Gustavo A. R. Silva" , Ulf Hansson Cc: linux-arm-kernel@lists.infradead.org, linux-unisoc@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-rtc@vger.kernel.org, linux-clk@vger.kernel.org, linux-pm@vger.kernel.org, dmaengine@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mmc@vger.kernel.org, Dang Huynh X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1758054322; l=4260; i=dang.huynh@mainlining.org; s=20250917; h=from:subject:message-id; bh=HFlkcuGoP8mh0AtLbkenNjV8o+UREGJUxRrmMlpYY+8=; b=tDnwi027u0ZztdCHk9SEr/lKN0wXoeRqVTLuHk786MC7CkCmAPImsXjgN/ULbHg//6qHti8x6 8cGQKoU4pBQCo0nPOwWFQeuoR0ZX1cppWJGWEFpFHKUyjOi/YBYx5Y2 X-Developer-Key: i=dang.huynh@mainlining.org; a=ed25519; pk=RyzH4CL4YU/ItXYUurA51EVBidfx4lIy8/E4EKRJCUk= X-Endpoint-Received: by B4 Relay for dang.huynh@mainlining.org/20250917 with auth_id=526 X-Original-From: Dang Huynh Reply-To: dang.huynh@mainlining.org From: Dang Huynh This basic driver can only reboot, powering off requires the modem firmware which we don't have yet. Signed-off-by: Dang Huynh --- MAINTAINERS | 6 +++++ drivers/power/reset/Kconfig | 9 +++++++ drivers/power/reset/Makefile | 1 + drivers/power/reset/rda-reboot.c | 58 ++++++++++++++++++++++++++++++++++++= ++++ 4 files changed, 74 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index cbe2ab8af6dcd40dd1456d9df55673dace3c87b2..5ec24d8657bffb55c160947a930= 980e428c6a6b7 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -21399,6 +21399,12 @@ S: Maintained F: Documentation/devicetree/bindings/clock/rda,8810pl-apsyscon.yaml F: drivers/clk/rda/clk-rda8810.c =20 +RDA MICRO MODEM RESET DRIVER +M: Dang Huynh +S: Maintained +F: Documentation/devicetree/bindings/power/reset/rda,md-reset.yaml +F: drivers/power/reset/rda-reboot.c + RDA MICRO REAL TIME CLOCK DRIVER M: Dang Huynh S: Maintained diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index 77ea3129c70806929f3c248667db42f05f5f1d27..de9b1afb94d14a5d23286ddb302= af4107d649c12 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -205,6 +205,15 @@ config POWER_RESET_QNAP =20 Say Y if you have a QNAP NAS. =20 +config POWER_RESET_RDA + bool "RDA Micro Reset Driver" + depends on ARCH_RDA + help + This driver supports soft resetting RDA Micro boards by writing + magic values to the modem register. + + Say Y if you have a board with RDA Micro SoC. + config POWER_RESET_REGULATOR bool "Regulator subsystem power-off driver" depends on OF && REGULATOR diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index b7c2b5940be9971548a5527384d1931abff11c4c..14371230410dad2852489160f4f= c23d8fd087d6e 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -22,6 +22,7 @@ obj-$(CONFIG_POWER_RESET_ODROID_GO_ULTRA_POWEROFF) +=3D o= droid-go-ultra-poweroff.o obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) +=3D piix4-poweroff.o obj-$(CONFIG_POWER_RESET_LTC2952) +=3D ltc2952-poweroff.o obj-$(CONFIG_POWER_RESET_QNAP) +=3D qnap-poweroff.o +obj-$(CONFIG_POWER_RESET_RDA) +=3D rda-reboot.o obj-$(CONFIG_POWER_RESET_REGULATOR) +=3D regulator-poweroff.o obj-$(CONFIG_POWER_RESET_RESTART) +=3D restart-poweroff.o obj-$(CONFIG_POWER_RESET_ST) +=3D st-poweroff.o diff --git a/drivers/power/reset/rda-reboot.c b/drivers/power/reset/rda-reb= oot.c new file mode 100644 index 0000000000000000000000000000000000000000..d87b063ba67d847f8e869e50a6c= 01427b2866889 --- /dev/null +++ b/drivers/power/reset/rda-reboot.c @@ -0,0 +1,58 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2025, Dang Huynh + * + * Based on drivers/power/reset/msm-poweroff.c: + * Copyright (c) 2013, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static void __iomem *rda_md_sysctrl; + +static int do_rda_reboot(struct sys_off_data *data) +{ + /* unprotect md registers */ + writel(0x00A50001, rda_md_sysctrl); + + /* reset all */ + writel(0x80000000, rda_md_sysctrl + 4); + + return NOTIFY_DONE; +} + +static int rda_reboot_probe(struct platform_device *pdev) +{ + rda_md_sysctrl =3D devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(rda_md_sysctrl)) + return PTR_ERR(rda_md_sysctrl); + + devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_RESTART, + 128, do_rda_reboot, NULL); + + return 0; +} + +static const struct of_device_id of_rda_reboot_match[] =3D { + { .compatible =3D "rda,md-reset", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_rda_reboot_match); + +static struct platform_driver rda_reboot_driver =3D { + .probe =3D rda_reboot_probe, + .driver =3D { + .name =3D "rda-reboot", + .of_match_table =3D of_match_ptr(of_rda_reboot_match), + }, +}; +builtin_platform_driver(rda_reboot_driver); --=20 2.51.0