[v3,06/27] dm: powerpc: P1020: add i2c DM support

diff --git a/arch/powerpc/dts/p1020-post.dtsi b/arch/powerpc/dts/p1020-post.dtsi
index 1c77702f01..1dce8e86e9 100644
--- a/arch/powerpc/dts/p1020-post.dtsi
+++ b/arch/powerpc/dts/p1020-post.dtsi
@@ -44,6 +44,8 @@ 
 		clock-frequency = <0>;
 	};
 
+	/include/ "pq3-i2c-0.dtsi"
+	/include/ "pq3-i2c-1.dtsi"
 };
 
 /* PCIe controller base address 0x9000 */
diff --git a/board/freescale/p1_p2_rdb_pc/p1_p2_rdb_pc.c b/board/freescale/p1_p2_rdb_pc/p1_p2_rdb_pc.c
index 71fca8ca1e..f668d7efb1 100644
--- a/board/freescale/p1_p2_rdb_pc/p1_p2_rdb_pc.c
+++ b/board/freescale/p1_p2_rdb_pc/p1_p2_rdb_pc.c
@@ -1,6 +1,7 @@ 
 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc.
+ * Copyright 2020 NXP
  */
 
 #include <common.h>
@@ -227,6 +228,7 @@  int checkboard(void)
 	struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE);
 	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 	u8 in, out, io_config, val;
+	int bus_num = CONFIG_SYS_SPD_BUS_NUM;
 
 	printf("Board: %s CPLD: V%d.%d PCBA: V%d.0\n", CONFIG_BOARDNAME,
 		in_8(&cpld_data->cpld_rev_major) & 0x0F,
@@ -234,7 +236,26 @@  int checkboard(void)
 		in_8(&cpld_data->pcba_rev) & 0x0F);
 
 	/* Initialize i2c early for rom_loc and flash bank information */
-	i2c_set_bus_num(CONFIG_SYS_SPD_BUS_NUM);
+	#if defined(CONFIG_DM_I2C)
+	struct udevice *dev;
+	int ret;
+
+	ret = i2c_get_chip_for_busnum(bus_num, CONFIG_SYS_I2C_PCA9557_ADDR,
+				      1, &dev);
+	if (ret) {
+		printf("%s: Cannot find udev for a bus %d\n", __func__,
+		       bus_num);
+		return -ENXIO;
+	}
+
+	if (dm_i2c_read(dev, 0, &in, 1) < 0 ||
+	    dm_i2c_read(dev, 1, &out, 1) < 0 ||
+	    dm_i2c_read(dev, 3, &io_config, 1) < 0) {
+		printf("Error reading i2c boot information!\n");
+		return 0; /* Don't want to hang() on this error */
+	}
+	#else /* Non DM I2C support - will be removed */
+	i2c_set_bus_num(bus_num);
 
 	if (i2c_read(CONFIG_SYS_I2C_PCA9557_ADDR, 0, 1, &in, 1) < 0 ||
 	    i2c_read(CONFIG_SYS_I2C_PCA9557_ADDR, 1, 1, &out, 1) < 0 ||
@@ -242,6 +263,7 @@  int checkboard(void)
 		printf("Error reading i2c boot information!\n");
 		return 0; /* Don't want to hang() on this error */
 	}
+	#endif
 
 	val = (in & io_config) | (out & (~io_config));
 
diff --git a/include/configs/P1022DS.h b/include/configs/P1022DS.h
index 5cc2e06979..f8b035fb79 100644
--- a/include/configs/P1022DS.h
+++ b/include/configs/P1022DS.h
@@ -359,8 +359,8 @@ 
 #endif
 
 /* I2C */
+#ifndef CONFIG_DM_I2C
 #define CONFIG_SYS_I2C
-#define CONFIG_SYS_I2C_FSL
 #define CONFIG_SYS_FSL_I2C_SPEED	400000
 #define CONFIG_SYS_FSL_I2C_SLAVE	0x7F
 #define CONFIG_SYS_FSL_I2C_OFFSET	0x3000
@@ -368,6 +368,8 @@ 
 #define CONFIG_SYS_FSL_I2C2_SLAVE	0x7F
 #define CONFIG_SYS_FSL_I2C2_OFFSET	0x3100
 #define CONFIG_SYS_I2C_NOPROBES		{{0, 0x29}}
+#endif
+#define CONFIG_SYS_I2C_FSL
 
 /*
  * I2C2 EEPROM
diff --git a/include/configs/p1_p2_rdb_pc.h b/include/configs/p1_p2_rdb_pc.h
index c42f1a9fce..d59fd033bd 100644
--- a/include/configs/p1_p2_rdb_pc.h
+++ b/include/configs/p1_p2_rdb_pc.h
@@ -1,6 +1,7 @@ 
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright 2010-2011 Freescale Semiconductor, Inc.
+ * Copyright 2020 NXP
  */
 
 /*
@@ -537,8 +538,8 @@ 
 #define CONFIG_SYS_NS16550_COM2	(CONFIG_SYS_CCSRBAR+0x4600)
 
 /* I2C */
+#ifndef CONFIG_DM_I2C
 #define CONFIG_SYS_I2C
-#define CONFIG_SYS_I2C_FSL
 #define CONFIG_SYS_FSL_I2C_SPEED	400000
 #define CONFIG_SYS_FSL_I2C_SLAVE	0x7F
 #define CONFIG_SYS_FSL_I2C_OFFSET	0x3000
@@ -546,6 +547,12 @@ 
 #define CONFIG_SYS_FSL_I2C2_SLAVE	0x7F
 #define CONFIG_SYS_FSL_I2C2_OFFSET	0x3100
 #define CONFIG_SYS_I2C_NOPROBES		{ {0, 0x29} }
+#else
+#define CONFIG_I2C_SET_DEFAULT_BUS_NUM
+#define CONFIG_I2C_DEFAULT_BUS_NUMBER	0
+#endif
+
+#define CONFIG_SYS_I2C_FSL
 #define CONFIG_SYS_I2C_EEPROM_ADDR	0x52
 #define CONFIG_SYS_SPD_BUS_NUM		1 /* For rom_loc and flash bank */