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Message-ID: <1363801180-8284-1-git-send-email-b20788@freescale.com>
Date: Wed, 20 Mar 2013 13:39:38 -0400
From: Anson Huang <b20788@...escale.com>
To: <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>
CC: <kernel@...gutronix.de>, <linux@....linux.org.uk>,
<shawn.guo@...aro.org>
Subject: [PATCH 1/3] ARM: imx: enable anatop suspend/resume
anatop module have sereval configurations for user
to reduce the power consumption in suspend, provide
suspend/resume interface for further use and enable
fet_odrive to reduce CORE LDO leakage during suspend.
Signed-off-by: Anson Huang <b20788@...escale.com>
---
arch/arm/mach-imx/Kconfig | 4 ++++
arch/arm/mach-imx/Makefile | 1 +
arch/arm/mach-imx/anatop.c | 50 ++++++++++++++++++++++++++++++++++++++++
arch/arm/mach-imx/common.h | 3 +++
arch/arm/mach-imx/mach-imx6q.c | 1 +
arch/arm/mach-imx/pm-imx6q.c | 2 ++
6 files changed, 61 insertions(+)
create mode 100644 arch/arm/mach-imx/anatop.c
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 4c9c6f9..7abaa6e 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -74,6 +74,9 @@ config HAVE_IMX_MMDC
config HAVE_IMX_SRC
def_bool y if SMP
+config HAVE_IMX_ANATOP
+ bool
+
config IMX_HAVE_IOMUX_V1
bool
@@ -816,6 +819,7 @@ config SOC_IMX6Q
select HAVE_IMX_GPC
select HAVE_IMX_MMDC
select HAVE_IMX_SRC
+ select HAVE_IMX_ANATOP
select HAVE_SMP
select MFD_SYSCON
select PINCTRL
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index c4ce090..f4badaa 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -95,6 +95,7 @@ obj-$(CONFIG_MACH_VPR200) += mach-vpr200.o
obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
obj-$(CONFIG_HAVE_IMX_MMDC) += mmdc.o
obj-$(CONFIG_HAVE_IMX_SRC) += src.o
+obj-$(CONFIG_HAVE_IMX_ANATOP) += anatop.o
AFLAGS_headsmp.o :=-Wa,-march=armv7-a
obj-$(CONFIG_SMP) += headsmp.o platsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
diff --git a/arch/arm/mach-imx/anatop.c b/arch/arm/mach-imx/anatop.c
new file mode 100644
index 0000000..8f6ab27
--- /dev/null
+++ b/arch/arm/mach-imx/anatop.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2013 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+
+#define REG_SET 0x4
+#define REG_CLR 0x8
+#define ANA_REG_CORE 0x140
+
+#define BM_ANADIG_REG_CORE_FET_ODRIVE 0x20000000
+
+static struct regmap *anatop;
+
+void imx_anatop_enable_fet_odrive(bool enable)
+{
+ regmap_write(anatop, ANA_REG_CORE + (enable ?
+ REG_SET : REG_CLR), BM_ANADIG_REG_CORE_FET_ODRIVE);
+}
+
+void imx_anatop_pre_suspend(void)
+{
+ imx_anatop_enable_fet_odrive(true);
+}
+
+void imx_anatop_post_resume(void)
+{
+ imx_anatop_enable_fet_odrive(false);
+}
+
+void __init imx_anatop_init(void)
+{
+ anatop = syscon_regmap_lookup_by_compatible("fsl,imx6q-anatop");
+ if (IS_ERR(anatop)) {
+ pr_err("%s: failed to find imx6q-anatop regmap!\n", __func__);
+ return;
+ }
+}
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index 5a800bf..004c2b3 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -129,6 +129,9 @@ extern void imx_src_prepare_restart(void);
extern void imx_gpc_init(void);
extern void imx_gpc_pre_suspend(void);
extern void imx_gpc_post_resume(void);
+extern void imx_anatop_init(void);
+extern void imx_anatop_pre_suspend(void);
+extern void imx_anatop_post_resume(void);
extern int imx6q_set_lpm(enum mxc_cpu_pwr_mode mode);
extern void imx6q_set_chicken_bit(void);
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index 9ffd103..aa867db 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -197,6 +197,7 @@ static void __init imx6q_init_machine(void)
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+ imx_anatop_init();
imx6q_pm_init();
imx6q_usb_init();
imx6q_1588_init();
diff --git a/arch/arm/mach-imx/pm-imx6q.c b/arch/arm/mach-imx/pm-imx6q.c
index 5faba7a..05b26cd 100644
--- a/arch/arm/mach-imx/pm-imx6q.c
+++ b/arch/arm/mach-imx/pm-imx6q.c
@@ -34,10 +34,12 @@ static int imx6q_pm_enter(suspend_state_t state)
case PM_SUSPEND_MEM:
imx6q_set_lpm(STOP_POWER_OFF);
imx_gpc_pre_suspend();
+ imx_anatop_pre_suspend();
imx_set_cpu_jump(0, v7_cpu_resume);
/* Zzz ... */
cpu_suspend(0, imx6q_suspend_finish);
imx_smp_prepare();
+ imx_anatop_post_resume();
imx_gpc_post_resume();
imx6q_set_lpm(WAIT_CLOCKED);
break;
--
1.7.9.5
--
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