From 2f66a828f7621958b6925fc763380fa87be55ee6 Mon Sep 17 00:00:00 2001
From: Ying Zhang <b40530@freescale.com>
Date: Fri, 22 Jan 2016 12:15:13 +0800
Subject: [PATCH] powerpc/board/t4240rdb: Enable VID support
The fuse status register provides the values from on-chip
voltage ID efuses programmed at the factory. These values
define the voltage requirements for the chip. u-boot reads
FUSESR and translates the values into the appropriate
commands to set the voltage output value of an external
voltage regulator.
Signed-off-by: Ying Zhang <b40530@freescale.com>
Reviewed-by: York Sun <york.sun@nxp.com>
---
board/freescale/common/vid.c | 2 +-
board/freescale/t4rdb/t4240rdb.c | 8 ++++++++
include/configs/T4240RDB.h | 10 ++++++++++
3 files changed, 19 insertions(+), 1 deletion(-)
diff --git a/board/freescale/common/vid.c b/board/freescale/common/vid.c
index 1ea1b88a10..1bd65a8e55 100644
--- a/board/freescale/common/vid.c
+++ b/board/freescale/common/vid.c
@@ -42,7 +42,7 @@ int __weak board_vdd_drop_compensation(void)
* The IR chip can show up under the following addresses:
* 0x08 (Verified on T1040RDB-PA,T4240RDB-PB,X-T4240RDB-16GPA)
* 0x09 (Verified on T1040RDB-PA)
- * 0x38 (Verified on T2080QDS, T2081QDS)
+ * 0x38 (Verified on T2080QDS, T2081QDS, T4240RDB)
*/
static int find_ir_chip_on_i2c(void)
{
diff --git a/board/freescale/t4rdb/t4240rdb.c b/board/freescale/t4rdb/t4240rdb.c
index 4f0bbed721..406fb132ae 100644
--- a/board/freescale/t4rdb/t4240rdb.c
+++ b/board/freescale/t4rdb/t4240rdb.c
@@ -20,6 +20,7 @@
#include "t4rdb.h"
#include "cpld.h"
+#include "../common/vid.h"
DECLARE_GLOBAL_DATA_PTR;
@@ -74,6 +75,13 @@ int board_early_init_r(void)
MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
0, flash_esel, BOOKE_PAGESZ_256M, 1);
+ /*
+ * Adjust core voltage according to voltage ID
+ * This function changes I2C mux to channel 2.
+ */
+ if (adjust_vdd(0))
+ printf("Warning: Adjusting core voltage failed.\n");
+
return 0;
}
diff --git a/include/configs/T4240RDB.h b/include/configs/T4240RDB.h
index 73279c899e..4a17f41eb3 100644
--- a/include/configs/T4240RDB.h
+++ b/include/configs/T4240RDB.h
@@ -606,6 +606,16 @@ unsigned long get_board_ddr_clk(void);
#define I2C_VOL_MONITOR_BUS_V_OVF 0x1
#define I2C_VOL_MONITOR_BUS_V_SHIFT 3
+#define CONFIG_VID_FLS_ENV "t4240rdb_vdd_mv"
+#ifndef CONFIG_SPL_BUILD
+#define CONFIG_VID
+#endif
+#define CONFIG_VOL_MONITOR_IR36021_SET
+#define CONFIG_VOL_MONITOR_IR36021_READ
+/* The lowest and highest voltage allowed for T4240RDB */
+#define VDD_MV_MIN 819
+#define VDD_MV_MAX 1212
+
/*
* eSPI - Enhanced SPI
*/
--
2.39.5