sunxi: pinephone: detect existed magnetometer and fixup dtb

from: <https://github.com/Tow-Boot/U-Boot/pull/2>

board/sunxi/board.c

@@ -15,6 +15,7 @@
 #include <dm.h>
 #include <env.h>
 #include <hang.h>
+#include <i2c.h>
 #include <image.h>
 #include <init.h>
 #include <log.h>
@@ -877,6 +878,27 @@ static void bluetooth_dt_fixup(void *blob)
 			   "local-bd-address", bdaddr, ETH_ALEN, 1);
 }
 
+#define PINEPHONE_LIS3MDL_I2C_ADDR	0x1E
+#define PINEPHONE_LIS3MDL_I2C_BUS	1 /* I2C1 */
+
+static	void board_dt_fixup(void *blob)
+{
+	struct udevice *bus, *dev;
+
+	if (IS_ENABLED(CONFIG_PINEPHONE_DT_SELECTION) &&
+	    !fdt_node_check_compatible(blob, 0, "pine64,pinephone-1.2")) {
+		if (!uclass_get_device_by_seq(UCLASS_I2C, PINEPHONE_LIS3MDL_I2C_BUS, &bus)) {
+			dm_i2c_probe(bus, PINEPHONE_LIS3MDL_I2C_ADDR, 0, &dev);
+			fdt_set_status_by_compatible(
+				blob, "st,lis3mdl-magn",
+				dev ? FDT_STATUS_OKAY  : FDT_STATUS_DISABLED);
+			fdt_set_status_by_compatible(
+				blob, "voltafield,af8133j",
+				dev ? FDT_STATUS_DISABLED : FDT_STATUS_OKAY);
+		}
+	}
+}
+
 int ft_board_setup(void *blob, struct bd_info *bd)
 {
 	int __maybe_unused r;
@@ -890,6 +912,7 @@ int ft_board_setup(void *blob, struct bd_info *bd)
 	fdt_fixup_ethernet(blob);
 
 	bluetooth_dt_fixup(blob);
+	board_dt_fixup(blob);
 
 #ifdef CONFIG_VIDEO_DT_SIMPLEFB
 	r = sunxi_simplefb_setup(blob);

configs/pinephone_defconfig

@@ -11,6 +11,7 @@ CONFIG_MMC_SUNXI_SLOT_EXTRA=2
 CONFIG_PINEPHONE_DT_SELECTION=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_OF_LIST="sun50i-a64-pinephone-1.1 sun50i-a64-pinephone-1.2"
+CONFIG_SYS_I2C_MVTWSI=y
 CONFIG_LED_STATUS=y
 CONFIG_LED_STATUS_GPIO=y
 CONFIG_LED_STATUS0=y