Re: [U-Boot] [PATCH 2/2 v3] board/t4240rdb: VID support

[york sun]

On 01/21/2016 09:48 PM, ying.zh...@freescale.com wrote:
> From: Ying Zhang 
> 
> 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 
> ---
> Changed from v2:
> - Split the Intel mode support patch
> Changed from v1:
> - Not support IR chip is used in AMD mode
> ---

Revised subject and slightly reformat commit message

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.

Applied to u-boot-mpc85xx master branch. Awaiting upstream.

Thanks.

York

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[U-Boot] [PATCH 2/2 v3] board/t4240rdb: VID support

[ying.zhang]

From: Ying Zhang 

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 
---
Changed from v2:
- Split the Intel mode support patch
Changed from v1:
- Not support IR chip is used in AMD mode
---
 board/freescale/common/vid.c |  2 +-
 board/freescale/t4rdb/t4240rdb.c |  7 +++
 include/configs/T4240RDB.h   | 10 ++
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/board/freescale/common/vid.c b/board/freescale/common/vid.c
index 1ea1b88..1bd65a8 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 fac442b..99a8730 100644
--- a/board/freescale/t4rdb/t4240rdb.c
+++ b/board/freescale/t4rdb/t4240rdb.c
@@ -21,6 +21,7 @@
 
 #include "t4rdb.h"
 #include "cpld.h"
+#include "../common/vid.h"
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -79,6 +80,12 @@ int board_early_init_r(void)
 #ifdef CONFIG_SYS_DPAA_QBMAN
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/T4240RDB.h b/include/configs/T4240RDB.h
index 73279c8..4a17f41 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_SHIFT3
 
+#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
  */
-- 
1.8.4.1

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