From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753595AbaIZDxZ (ORCPT ); Thu, 25 Sep 2014 23:53:25 -0400 Received: from mail-by2on0118.outbound.protection.outlook.com ([207.46.100.118]:49563 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753350AbaIZDwp (ORCPT ); Thu, 25 Sep 2014 23:52:45 -0400 From: Robin Gong To: , , , , , , , , , , , , CC: , , , Subject: [PATCH v4 2/3] power: reset: imx-snvs-poweroff: add power off driver for i.mx6 Date: Fri, 26 Sep 2014 11:59:06 +0800 Message-ID: <1411703947-31956-3-git-send-email-b38343@freescale.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1411703947-31956-1-git-send-email-b38343@freescale.com> References: <1411703947-31956-1-git-send-email-b38343@freescale.com> X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:192.88.158.2;CTRY:US;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(10019020)(6009001)(189002)(199003)(20776003)(85306004)(97736003)(47776003)(102836001)(64706001)(21056001)(33646002)(84676001)(79102003)(99396003)(77982003)(46102003)(74662003)(74502003)(81542003)(81342003)(80022003)(76176999)(50986999)(36756003)(95666004)(10300001)(81156004)(106466001)(120916001)(90102001)(230783001)(105606002)(76482002)(2201001)(69596002)(85852003)(68736004)(92726001)(83072002)(4396001)(50226001)(50466002)(48376002)(89996001)(6806004)(104166001)(87286001)(77156001)(229853001)(104016003)(107046002)(31966008)(83322001)(19580405001)(19580395003)(87936001)(88136002)(44976005)(93916002)(92566001)(62966002)(921003)(1121002)(83996005)(2101003)(42262002);DIR:OUT;SFP:1102;SCL:1;SRVR:BLUPR03MB343;H:az84smr01.freescale.net;FPR:;MLV:sfv;PTR:InfoDomainNonexistent;MX:1;A:1;LANG:en; MIME-Version: 1.0 Content-Type: text/plain X-Microsoft-Antispam: UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BLUPR03MB343; X-Forefront-PRVS: 03468CBA43 Authentication-Results: spf=fail (sender IP is 192.88.158.2) smtp.mailfrom=yibin.gong@freescale.com; X-OriginatorOrg: freescale.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This driver register pm_power_off with snvs power off function. If your boards NOT use PMIC_ON_REQ to turn on/off external pmic, or use other pin to do, please disable the driver in dts, otherwise, your pm_power_off maybe overwrote by this driver. Signed-off-by: Robin Gong --- .../bindings/power_supply/imx-snvs-poweroff.txt | 23 +++++++ drivers/power/reset/Kconfig | 9 +++ drivers/power/reset/Makefile | 1 + drivers/power/reset/imx-snvs-poweroff.c | 66 ++++++++++++++++++++ 4 files changed, 99 insertions(+) create mode 100644 Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt create mode 100644 drivers/power/reset/imx-snvs-poweroff.c diff --git a/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt b/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt new file mode 100644 index 0000000..dc7c9ba --- /dev/null +++ b/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt @@ -0,0 +1,23 @@ +i.mx6 Poweroff Driver + +SNVS_LPCR in SNVS module can power off the whole system by pull +PMIC_ON_REQ low if PMIC_ON_REQ is connected with external PMIC. +If you don't want to use PMIC_ON_REQ as power on/off control, +please set status='disabled' to disable this driver. + +Required Properties: +-compatible: "fsl,sec-v4.0-poweroff" +-reg: Specifies the physical address of the SNVS_LPCR register + +Example: + snvs@020cc000 { + compatible = "fsl,sec-v4.0-mon", "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0 0x020cc000 0x4000>; + ..... + snvs_poweroff: snvs-poweroff@38 { + compatible = "fsl,sec-v4.0-poweroff"; + reg = <0x38 0x4>; + }; + } diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index ca41523..b26c547 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -45,6 +45,15 @@ config POWER_RESET_HISI help Reboot support for Hisilicon boards. +config POWER_RESET_IMX + bool "IMX6 power-off driver" + depends on POWER_RESET && SOC_IMX6 + help + This driver support power off external PMIC by PMIC_ON_REQ on i.mx6 + boards.If you want to use other pin to control external power,please + say N here or disable in dts to make sure pm_power_off never be + overwrote wrongly by this driver. + config POWER_RESET_MSM bool "Qualcomm MSM power-off driver" depends on POWER_RESET && ARCH_QCOM diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index a42e70e..2524daf 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o +obj-$(CONFIG_POWER_RESET_IMX) += imx-snvs-poweroff.o obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o diff --git a/drivers/power/reset/imx-snvs-poweroff.c b/drivers/power/reset/imx-snvs-poweroff.c new file mode 100644 index 0000000..ad6ce50 --- /dev/null +++ b/drivers/power/reset/imx-snvs-poweroff.c @@ -0,0 +1,66 @@ +/* Power off driver for i.mx6 + * Copyright (c) 2014, FREESCALE CORPORATION. All rights reserved. + * + * based on msm-poweroff.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; 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 +#include +#include + +static void __iomem *snvs_base; + +static void do_imx_poweroff(void) +{ + u32 value = readl(snvs_base); + + /* set TOP and DP_EN bit */ + writel(value | 0x60, snvs_base); +} + +static int imx_poweroff_probe(struct platform_device *pdev) +{ + snvs_base = of_iomap(pdev->dev.of_node, 0); + if (!snvs_base) { + dev_err(&pdev->dev, "failed to get memory\n"); + return -ENODEV; + } + + pm_power_off = do_imx_poweroff; + return 0; +} + +static const struct of_device_id of_imx_poweroff_match[] = { + { .compatible = "fsl,sec-v4.0-poweroff", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_imx_poweroff_match); + +static struct platform_driver imx_poweroff_driver = { + .probe = imx_poweroff_probe, + .driver = { + .name = "imx-snvs-poweroff", + .of_match_table = of_match_ptr(of_imx_poweroff_match), + }, +}; + +static int __init imx_poweroff_init(void) +{ + return platform_driver_register(&imx_poweroff_driver); +} +device_initcall(imx_poweroff_init); -- 1.7.9.5