sunxi: axp: Add support for i2c based PMICs to the pmic-bus helpers

Add support for the axp152 and axp209 PMICs to the pmic register access
helpers. This is a preparation patch for moving the axp gpio code to a
separate gpio driver.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

arch/arm/cpu/armv7/sunxi/Makefile

@@ -27,6 +27,8 @@ obj-$(CONFIG_MACH_SUN7I)	+= clock_sun4i.o
 obj-$(CONFIG_MACH_SUN8I)	+= clock_sun6i.o
 obj-$(CONFIG_MACH_SUN9I)	+= clock_sun9i.o
 
+obj-$(CONFIG_AXP152_POWER)	+= pmic_bus.o
+obj-$(CONFIG_AXP209_POWER)	+= pmic_bus.o
 obj-$(CONFIG_AXP221_POWER)	+= pmic_bus.o
 
 ifndef CONFIG_SPL_BUILD

arch/arm/cpu/armv7/sunxi/pmic_bus.c

@@ -12,8 +12,13 @@
 #include <common.h>
 #include <asm/arch/p2wi.h>
 #include <asm/arch/rsb.h>
+#include <i2c.h>
 #include <asm/arch/pmic_bus.h>
 
+#define AXP152_I2C_ADDR			0x30
+
+#define AXP209_I2C_ADDR			0x34
+
 #define AXP221_CHIP_ADDR		0x68
 #define AXP221_CTRL_ADDR		0x3e
 #define AXP221_INIT_DATA		0x3e
@@ -25,24 +30,26 @@ int pmic_bus_init(void)
 {
 	/* This cannot be 0 because it is used in SPL before BSS is ready */
 	static int needs_init = 1;
-	int ret;
+	__maybe_unused int ret;
 
 	if (!needs_init)
 		return 0;
 
-#ifdef CONFIG_MACH_SUN6I
+#ifdef CONFIG_AXP221_POWER
+# ifdef CONFIG_MACH_SUN6I
 	p2wi_init();
 	ret = p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR,
 				       AXP221_INIT_DATA);
-#else
+# else
 	ret = rsb_init();
 	if (ret)
 		return ret;
 
 	ret = rsb_set_device_address(AXP223_DEVICE_ADDR, AXP223_RUNTIME_ADDR);
-#endif
+# endif
 	if (ret)
 		return ret;
+#endif
 
 	needs_init = 0;
 	return 0;
@@ -50,19 +57,31 @@ int pmic_bus_init(void)
 
 int pmic_bus_read(u8 reg, u8 *data)
 {
-#ifdef CONFIG_MACH_SUN6I
+#ifdef CONFIG_AXP152_POWER
+	return i2c_read(AXP152_I2C_ADDR, reg, 1, data, 1);
+#elif defined CONFIG_AXP209_POWER
+	return i2c_read(AXP209_I2C_ADDR, reg, 1, data, 1);
+#elif defined CONFIG_AXP221_POWER
+# ifdef CONFIG_MACH_SUN6I
 	return p2wi_read(reg, data);
-#else
+# else
 	return rsb_read(AXP223_RUNTIME_ADDR, reg, data);
+# endif
 #endif
 }
 
 int pmic_bus_write(u8 reg, u8 data)
 {
-#ifdef CONFIG_MACH_SUN6I
+#ifdef CONFIG_AXP152_POWER
+	return i2c_write(AXP152_I2C_ADDR, reg, 1, &data, 1);
+#elif defined CONFIG_AXP209_POWER
+	return i2c_write(AXP209_I2C_ADDR, reg, 1, &data, 1);
+#elif defined CONFIG_AXP221_POWER
+# ifdef CONFIG_MACH_SUN6I
 	return p2wi_write(reg, data);
-#else
+# else
 	return rsb_write(AXP223_RUNTIME_ADDR, reg, data);
+# endif
 #endif
 }