power: add rockchip_pm.c for devices low power control

during system suspend in charge animation, we may need add
power manage control for some devices low power. Since U-Boot
don't provide standard suspend/resume callback for device. We
have to add rockchip_pm.c to write hard code to achieve this
for different platforms or boards.

Change-Id: I01f67c7c57cbcaae48d3def65eea8cab499af93b
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>

drivers/power/Kconfig

@@ -81,6 +81,14 @@ config CHARGE_ANIMATION
 	help
 	  This adds a simple function for charge animation display.
 
+config ROCKCHIP_PM
+	bool "Enable Rockchip power manager for charge animation"
+	depends on CHARGE_ANIMATION
+	default y
+	help
+	  This adds power manage control of devices for low power
+	  during system suspend in charge animation.
+
 config AXP_DCDC1_VOLT
 	int "axp pmic dcdc1 voltage"
 	depends on AXP221_POWER || AXP809_POWER || AXP818_POWER

drivers/power/Makefile

@@ -13,6 +13,7 @@ obj-$(CONFIG_AXP221_POWER)	+= axp221.o
 obj-$(CONFIG_AXP809_POWER)	+= axp809.o
 obj-$(CONFIG_AXP818_POWER)	+= axp818.o
 obj-$(CONFIG_CHARGE_ANIMATION)	+= charge_animation.o
+obj-$(CONFIG_ROCKCHIP_PM)	+= rockchip_pm.o
 obj-$(CONFIG_EXYNOS_TMU)	+= exynos-tmu.o
 obj-$(CONFIG_FTPMU010_POWER)	+= ftpmu010.o
 obj-$(CONFIG_SY8106A_POWER)	+= sy8106a.o

drivers/power/charge_animation.c

@@ -17,6 +17,7 @@
 #include <linux/input.h>
 #include <power/charge_display.h>
 #include <power/charge_animation.h>
+#include <power/rockchip_pm.h>
 #include <power/fuel_gauge.h>
 #include <power/pmic.h>
 #include <power/rk8xx_pmic.h>
@@ -122,12 +123,16 @@ static int system_suspend_enter(struct charge_animation_pdata *pdata)
 		putc('2');
 		irqs_suspend();
 		putc('3');
+		device_suspend();
+		putc('4');
 		putc('\n');
 
 		/* Trap into ATF for low power mode */
 		cpu_suspend(0, psci_system_suspend);
 
 		putc('\n');
+		putc('4');
+		device_resume();
 		putc('3');
 		irqs_resume();
 		putc('2');

drivers/power/rockchip_pm.c

@@ -0,0 +1,20 @@
+/*
+ * (C) Copyright 2018 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <command.h>
+#include <common.h>
+#include <dm.h>
+#include <power/rockchip_pm.h>
+
+int device_suspend(void)
+{
+	return 0;
+}
+
+int device_resume(void)
+{
+	return 0;
+}

include/power/rockchip_pm.h

@@ -0,0 +1,13 @@
+/*
+ * (C) Copyright 2018 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef _ROCKCHIP_PM_H_
+#define _ROCKCHIP_PM_H_
+
+int device_suspend(void);
+int device_resume(void);
+
+#endif