From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752717AbaIKHoz (ORCPT ); Thu, 11 Sep 2014 03:44:55 -0400 Received: from mail-bl2on0126.outbound.protection.outlook.com ([65.55.169.126]:3904 "EHLO na01-bl2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751355AbaIKHoy (ORCPT ); Thu, 11 Sep 2014 03:44:54 -0400 From: Robin Gong To: , , CC: , Subject: [PATCH v1] ARM: imx6: add pm_power_off support for i.mx6 chips Date: Thu, 11 Sep 2014 14:41:07 +0800 Message-ID: <1410417667-6436-1-git-send-email-b38343@freescale.com> X-Mailer: git-send-email 1.9.1 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)(62966002)(87286001)(85306004)(229853001)(104166001)(74662001)(31966008)(21056001)(107046002)(74502001)(26826002)(68736004)(83322001)(6806004)(44976005)(19580405001)(97736003)(84676001)(19580395003)(77156001)(90102001)(102836001)(36756003)(20776003)(33646002)(106466001)(47776003)(76482001)(93916002)(99396002)(92566001)(2201001)(92726001)(83072002)(50466002)(85852003)(105606002)(80022001)(64706001)(50226001)(104016003)(4396001)(46102001)(77982001)(81342001)(48376002)(95666004)(81542001)(87936001)(89996001)(88136002)(79102001)(50986999)(42262002);DIR:OUT;SFP:1102;SCL:1;SRVR:BLUPR03MB344;H:tx30smr01.am.freescale.net;FPR:;MLV:ovrnspm;PTR:InfoDomainNonexistent;A:1;MX:1;LANG:en; MIME-Version: 1.0 Content-Type: text/plain X-Microsoft-Antispam: UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BLUPR03MB344; X-Forefront-PRVS: 03319F6FEF Authentication-Results: spf=fail (sender IP is 192.88.168.50) 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 All chips of i.mx6 can be powered off by programming SNVS. For example : On i.mx6q-sabresd board, PMIC_ON_REQ connect with external pmic ON/OFF pin, that will cause the whole PMIC powered off except VSNVS. And system can restart once PMIC_ON_REQ goes high by push POWRER key. Signed-off-by: Robin Gong --- arch/arm/mach-imx/common.h | 1 + arch/arm/mach-imx/mach-imx6q.c | 2 ++ arch/arm/mach-imx/mach-imx6sl.c | 2 ++ arch/arm/mach-imx/mach-imx6sx.c | 2 ++ arch/arm/mach-imx/system.c | 22 +++++++++++++++++++++- 5 files changed, 28 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h index 1dabf43..baca11a 100644 --- a/arch/arm/mach-imx/common.h +++ b/arch/arm/mach-imx/common.h @@ -62,6 +62,7 @@ void mxc_set_cpu_type(unsigned int type); void mxc_restart(enum reboot_mode, const char *); void mxc_arch_reset_init(void __iomem *); void mxc_arch_reset_init_dt(void); +void mxc_power_off_init(void); int mx51_revision(void); int mx53_revision(void); void imx_set_aips(void __iomem *); diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c index d51c6e9..3d6610d 100644 --- a/arch/arm/mach-imx/mach-imx6q.c +++ b/arch/arm/mach-imx/mach-imx6q.c @@ -270,6 +270,8 @@ static void __init imx6q_init_machine(void) mxc_arch_reset_init_dt(); + mxc_power_off_init(); + parent = imx_soc_device_init(); if (parent == NULL) pr_warn("failed to initialize soc device\n"); diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c index ed263a2..c07e6e8 100644 --- a/arch/arm/mach-imx/mach-imx6sl.c +++ b/arch/arm/mach-imx/mach-imx6sl.c @@ -50,6 +50,8 @@ static void __init imx6sl_init_machine(void) mxc_arch_reset_init_dt(); + mxc_power_off_init(); + parent = imx_soc_device_init(); if (parent == NULL) pr_warn("failed to initialize soc device\n"); diff --git a/arch/arm/mach-imx/mach-imx6sx.c b/arch/arm/mach-imx/mach-imx6sx.c index 3de3b73..68ea070 100644 --- a/arch/arm/mach-imx/mach-imx6sx.c +++ b/arch/arm/mach-imx/mach-imx6sx.c @@ -20,6 +20,8 @@ static void __init imx6sx_init_machine(void) mxc_arch_reset_init_dt(); + mxc_power_off_init(); + parent = imx_soc_device_init(); if (parent == NULL) pr_warn("failed to initialize soc device\n"); diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c index d14c33f..925fb29 100644 --- a/arch/arm/mach-imx/system.c +++ b/arch/arm/mach-imx/system.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include @@ -32,7 +33,9 @@ #include "common.h" #include "hardware.h" -static void __iomem *wdog_base; +#define SNVS_LPCR 0x04 + +static void __iomem *wdog_base, *snvs_base; static struct clk *wdog_clk; /* @@ -104,6 +107,23 @@ void __init mxc_arch_reset_init_dt(void) clk_prepare(wdog_clk); } +static void power_off_snvs(void) +{ + u32 value = readl(snvs_base + SNVS_LPCR); + /* set TOP and DP_EN bit */ + writel(value | 0x60, snvs_base + SNVS_LPCR); +} + +void __init mxc_power_off_init(void) +{ + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0-mon-rtc-lp"); + snvs_base = of_iomap(np, 0); + WARN_ON(!snvs_base); + pm_power_off = power_off_snvs; +} + #ifdef CONFIG_CACHE_L2X0 void __init imx_init_l2cache(void) { -- 1.9.1