From patchwork Wed Nov 6 12:18:23 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laxman Dewangan X-Patchwork-Id: 3147081 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id C2B399F432 for ; Wed, 6 Nov 2013 12:22:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 24B052054A for ; Wed, 6 Nov 2013 12:22:46 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CB0262053E for ; Wed, 6 Nov 2013 12:22:44 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Ve26X-0005AZ-4n; Wed, 06 Nov 2013 12:21:01 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Ve265-0006OH-Qw; Wed, 06 Nov 2013 12:20:33 +0000 Received: from hqemgate15.nvidia.com ([216.228.121.64]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Ve25X-0006G7-Ef for linux-arm-kernel@lists.infradead.org; Wed, 06 Nov 2013 12:20:05 +0000 Received: from hqnvupgp08.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com id ; Wed, 06 Nov 2013 04:18:58 -0800 Received: from hqemhub01.nvidia.com ([172.20.12.94]) by hqnvupgp08.nvidia.com (PGP Universal service); Wed, 06 Nov 2013 04:14:22 -0800 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Wed, 06 Nov 2013 04:14:22 -0800 Received: from hqnvemgw02.nvidia.com (172.16.227.111) by hqemhub01.nvidia.com (172.20.150.30) with Microsoft SMTP Server id 8.3.327.1; Wed, 6 Nov 2013 04:19:40 -0800 Received: from thelma.nvidia.com (Not Verified[172.16.212.77]) by hqnvemgw02.nvidia.com with MailMarshal (v7,1,2,5326) id ; Wed, 06 Nov 2013 04:19:41 -0800 Received: from ldewangan-ubuntu.nvidia.com (dhcp-10-19-65-30.nvidia.com [10.19.65.30]) by thelma.nvidia.com (8.13.8+Sun/8.8.8) with ESMTP id rA6CJDFJ005722; Wed, 6 Nov 2013 04:19:37 -0800 (PST) From: Laxman Dewangan To: , , , , Subject: [PATCH V2 5/5] power: reset: as3722: add power-off driver Date: Wed, 6 Nov 2013 17:48:23 +0530 Message-ID: <1383740303-10956-6-git-send-email-ldewangan@nvidia.com> X-Mailer: git-send-email 1.7.1.1 In-Reply-To: <1383740303-10956-1-git-send-email-ldewangan@nvidia.com> References: <1383740303-10956-1-git-send-email-ldewangan@nvidia.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131106_071959_696212_A7A953E9 X-CRM114-Status: GOOD ( 17.65 ) X-Spam-Score: -1.9 (-) Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, linux-doc@vger.kernel.org, ijc+devicetree@hellion.org.uk, linux-kernel@vger.kernel.org, rob.herring@calxeda.com, Laxman Dewangan , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP ams AS3722 supports the power off functionality to turn off system. Add power off driver for ams AS3722. Signed-off-by: Laxman Dewangan --- Changes from V1: - None drivers/power/reset/Kconfig | 6 ++ drivers/power/reset/Makefile | 1 + drivers/power/reset/as3722-poweroff.c | 96 +++++++++++++++++++++++++++++++++ 3 files changed, 103 insertions(+), 0 deletions(-) create mode 100644 drivers/power/reset/as3722-poweroff.c diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index 9b3ea53..6d452a7 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -6,6 +6,12 @@ menuconfig POWER_RESET Say Y here to enable board reset and power off +config POWER_RESET_AS3722 + bool "ams AS3722 power-off driver" + depends on MFD_AS3722 && POWER_RESET + help + This driver supports turning off board via a ams AS3722 power-off. + config POWER_RESET_GPIO bool "GPIO power-off driver" depends on OF_GPIO && POWER_RESET diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 3e6ed88..a5b4a77 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -1,3 +1,4 @@ +obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o diff --git a/drivers/power/reset/as3722-poweroff.c b/drivers/power/reset/as3722-poweroff.c new file mode 100644 index 0000000..0e489ff --- /dev/null +++ b/drivers/power/reset/as3722-poweroff.c @@ -0,0 +1,96 @@ +/* + * Power off driver for ams AS3722 device. + * + * Copyright (c) 2013, NVIDIA Corporation. + * + * Author: Laxman Dewangan + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, + * whether express or implied; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include + +struct as3722_poweroff { + struct device *dev; + struct as3722 *as3722; +}; + +static struct as3722_poweroff *as3722_pm_poweroff; + +static void as3722_pm_power_off(void) +{ + int ret; + + if (!as3722_pm_poweroff) { + pr_err("AS3722 poweroff is not initialised\n"); + return; + } + + ret = as3722_update_bits(as3722_pm_poweroff->as3722, + AS3722_RESET_CONTROL_REG, AS3722_POWER_OFF, AS3722_POWER_OFF); + if (ret < 0) + dev_err(as3722_pm_poweroff->dev, + "RESET_CONTROL_REG update failed, %d\n", ret); +} + +static int as3722_poweroff_probe(struct platform_device *pdev) +{ + struct as3722_poweroff *as3722_poweroff; + struct device_node *np = pdev->dev.parent->of_node; + + if (!np) + return -EINVAL; + + if (!of_property_read_bool(np, "ams,system-power-controller")) + return 0; + + as3722_poweroff = devm_kzalloc(&pdev->dev, sizeof(*as3722_poweroff), + GFP_KERNEL); + if (!as3722_poweroff) + return -ENOMEM; + + as3722_poweroff->as3722 = dev_get_drvdata(pdev->dev.parent); + as3722_poweroff->dev = &pdev->dev; + as3722_pm_poweroff = as3722_poweroff; + if (!pm_power_off) + pm_power_off = as3722_pm_power_off; + + return 0; +} + +static int as3722_poweroff_remove(struct platform_device *pdev) +{ + if (pm_power_off == as3722_pm_power_off) + pm_power_off = NULL; + as3722_pm_poweroff = NULL; + + return 0; +} + +static struct platform_driver as3722_poweroff_driver = { + .driver = { + .name = "as3722-power-off", + .owner = THIS_MODULE, + }, + .probe = as3722_poweroff_probe, + .remove = as3722_poweroff_remove, +}; + +module_platform_driver(as3722_poweroff_driver); + +MODULE_DESCRIPTION("Power off driver for ams AS3722 PMIC Device"); +MODULE_ALIAS("platform:as3722-power-off"); +MODULE_AUTHOR("Laxman Dewangan "); +MODULE_LICENSE("GPL v2");