[U-Boot] [PATCH] board/t208xrdb: VID support

[U-Boot] [PATCH] board/t208xrdb: VID support

[ying.zhang at freescale.com]

From: Ying Zhang <b40530@freescale.com>

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>
---
 board/freescale/t208xrdb/t208xrdb.c |  7 +++++++
 include/configs/T208xRDB.h          | 11 +++++++++++
 2 files changed, 18 insertions(+)

diff --git a/board/freescale/t208xrdb/t208xrdb.c b/board/freescale/t208xrdb/t208xrdb.c
index 341453b..ad393df 100644
--- a/board/freescale/t208xrdb/t208xrdb.c
+++ b/board/freescale/t208xrdb/t208xrdb.c
@@ -19,6 +19,7 @@
 #include <fm_eth.h>
 #include "t208xrdb.h"
 #include "cpld.h"
+#include "../common/vid.h"
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -85,6 +86,12 @@ int board_early_init_r(void)
 	setup_portals();
 #endif
 
+	/*
+	 * 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/T208xRDB.h b/include/configs/T208xRDB.h
index db6b42e..2e48fc8 100644
--- a/include/configs/T208xRDB.h
+++ b/include/configs/T208xRDB.h
@@ -449,6 +449,17 @@ unsigned long get_board_ddr_clk(void);
 #define I2C_MUX_PCA_ADDR_SEC2	0x76 /* I2C bus multiplexer,secondary 2 */
 #define I2C_MUX_CH_DEFAULT	0x8
 
+#define I2C_MUX_CH_VOL_MONITOR	0xa
+
+#define CONFIG_VID_FLS_ENV		"t208xrdb_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 T208xRDB */
+#define VDD_MV_MIN			819
+#define VDD_MV_MAX			1212
 
 /*
  * RapidIO
-- 
1.8.4.1

[U-Boot] [PATCH] board/t208xrdb: VID support

[York Sun]

On 03/09/2015 11:21 PM, ying.zhang at freescale.com wrote:
> From: Ying Zhang <b40530@freescale.com>
> 
> 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>
> ---

Applied to mpc85xx master, awaiting upstream.

York