| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 11 Sep 2014 14:41:07 +0800
From: Robin Gong <b38343@...escale.com>
To: <shawn.guo@...escale.com>, <kernel@...gutronix.de>,
<linux@....linux.org.uk>
CC: <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH v1] ARM: imx6: add pm_power_off support for i.mx6 chips
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 <b38343@...escale.com>
---
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 <linux/delay.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/pm.h>
#include <asm/system_misc.h>
#include <asm/proc-fns.h>
@@ -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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists