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Wed, 17 Sep 2014 02:51:35 -0700 From: Robin Gong To: , , , , , , , , , , , Subject: [PATCH v3 2/3] power: reset: imx-snvs-poweroff: add power off driver for i.mx6 Date: Wed, 17 Sep 2014 17:57:59 +0800 Message-ID: <1410947881-7345-3-git-send-email-b38343@freescale.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1410947881-7345-1-git-send-email-b38343@freescale.com> References: <1410947881-7345-1-git-send-email-b38343@freescale.com> X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:192.88.168.50; CTRY:US; IPV:CAL; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(10019020)(6009001)(199003)(189002)(102836001)(50226001)(89996001)(106466001)(2201001)(97736003)(83072002)(74662003)(46102003)(77982003)(19580405001)(104016003)(19580395003)(36756003)(79102003)(80022003)(104166001)(74502003)(81342003)(92726001)(62966002)(50986999)(77156001)(90102001)(81542003)(229853001)(76176999)(76482002)(33646002)(87936001)(107046002)(230783001)(21056001)(20776003)(88136002)(26826002)(85852003)(99396002)(92566001)(44976005)(85306004)(31966008)(4396001)(87286001)(50466002)(47776003)(68736004)(48376002)(6806004)(83322001)(93916002)(95666004)(64706001)(84676001)(105606002)(921003)(1121002)(2004002)(42262002)(83996005)(2101003); DIR:OUT; SFP:1102; SCL:1; SRVR:BY2PR03MB345; H:tx30smr01.am.freescale.net; FPR:; MLV:ovr; PTR:InfoDomainNonexistent; A:1; MX:1; LANG:en; MIME-Version: 1.0 X-Microsoft-Antispam: UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BY2PR03MB345; X-Forefront-PRVS: 0337AFFE9A Received-SPF: Fail (protection.outlook.com: domain of freescale.com does not designate 192.88.168.50 as permitted sender) receiver=protection.outlook.com; client-ip=192.88.168.50; helo=tx30smr01.am.freescale.net; Authentication-Results: spf=fail (sender IP is 192.88.168.50) smtp.mailfrom=yibin.gong@freescale.com; X-OriginatorOrg: freescale.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140917_025206_819694_5A20BD28 X-CRM114-Status: GOOD ( 14.42 ) X-Spam-Score: -0.4 (/) Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 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=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, 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 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..6caf64e --- /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@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..d726ac4 --- /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 -EIO; + } + + 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);