dm: add charge display uclass

This is mainly used for charge animation.

Change-Id: Iac4ffe76b1985abfa44181a797a15df74e5bcf14
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>

drivers/power/Kconfig

@@ -8,6 +8,12 @@ source "drivers/power/pmic/Kconfig"
 
 source "drivers/power/regulator/Kconfig"
 
+config DM_CHARGE_DISPLAY
+	bool "Enable driver model for charge display support"
+	depends on DM
+	help
+	  This adds a simple uclass for charge display.
+
 choice
 	prompt "Select Sunxi PMIC Variant"
 	depends on ARCH_SUNXI

drivers/power/Makefile

@@ -5,6 +5,8 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
+obj-$(CONFIG_DM_CHARGE_DISPLAY)	+= charge-display-uclass.o
+
 obj-$(CONFIG_AXP152_POWER)	+= axp152.o
 obj-$(CONFIG_AXP209_POWER)	+= axp209.o
 obj-$(CONFIG_AXP221_POWER)	+= axp221.o

drivers/power/charge-display-uclass.c

@@ -0,0 +1,45 @@
+/*
+ * (C) Copyright 2017 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <command.h>
+#include <common.h>
+#include <dm.h>
+#include <power/charge_display.h>
+
+int charge_display_get_power_on_soc(struct udevice *dev)
+{
+	const struct dm_charge_display_ops *ops = dev_get_driver_ops(dev);
+
+	if (!ops || !ops->get_power_on_soc)
+		return -ENOSYS;
+
+	return ops->get_power_on_soc(dev);
+}
+
+int charge_display_get_power_on_voltage(struct udevice *dev)
+{
+	const struct dm_charge_display_ops *ops = dev_get_driver_ops(dev);
+
+	if (!ops || !ops->get_power_on_voltage)
+		return -ENOSYS;
+
+	return ops->get_power_on_voltage(dev);
+}
+
+int charge_display_show(struct udevice *dev)
+{
+	const struct dm_charge_display_ops *ops = dev_get_driver_ops(dev);
+
+	if (!ops || !ops->show)
+		return -ENOSYS;
+
+	return ops->show(dev);
+}
+
+UCLASS_DRIVER(charge_display) = {
+	.id	= UCLASS_CHARGE_DISPLAY,
+	.name	= "charge_display",
+};

include/dm/uclass-id.h

@@ -94,6 +94,7 @@ enum uclass_id {
 	UCLASS_FG,
 	UCLASS_KEY,
 	UCLASS_RC,		/* Remote Controller */
+	UCLASS_CHARGE_DISPLAY,	/* Charge display */
 
 	UCLASS_COUNT,
 	UCLASS_INVALID = -1,

include/power/charge_display.h

@@ -0,0 +1,20 @@
+/*
+ * (C) Copyright 2017 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef _CHARGE_DISPLAY_H_
+#define _CHARGE_DISPLAY_H_
+
+struct dm_charge_display_ops {
+	int (*get_power_on_soc)(struct udevice *dev);
+	int (*get_power_on_voltage)(struct udevice *dev);
+	int (*show)(struct udevice *dev);
+};
+
+int charge_display_get_power_on_soc(struct udevice *dev);
+int charge_display_get_power_on_voltage(struct udevice *dev);
+int charge_display_show(struct udevice *dev);
+
+#endif