On 01/20/2016 11:31 PM, ying.zhang@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
Changed from v1: - Not support IR chip is used in AMD mode
board/freescale/common/vid.c | 19 +++++++++++++++++-- board/freescale/common/vid.h | 4 ++++ board/freescale/t4rdb/t4240rdb.c | 7 +++++++ include/configs/T4240RDB.h | 10 ++++++++++ 4 files changed, 38 insertions(+), 2 deletions(-)
diff --git a/board/freescale/common/vid.c b/board/freescale/common/vid.c index f1bed51..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) { @@ -292,7 +292,7 @@ int adjust_vdd(ulong vdd_override) (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); #endif u32 fusesr;
- u8 vid;
- u8 vid, buf; int vdd_target, vdd_current, vdd_last; int ret, i2caddress; unsigned long vdd_string_override;
@@ -346,6 +346,21 @@ int adjust_vdd(ulong vdd_override) debug("VID: IR Chip found on I2C address 0x%02x\n", i2caddress); }
- /* check IR chip work on Intel mode*/
- ret = i2c_read(i2caddress,
IR36021_INTEL_MODE_OOFSET,1, (void *)&buf, 1);- if (ret) {
printf("VID: failed to read IR chip mode.\n");ret = -1;goto exit;- }
- if ((buf & IR36021_MODE_MASK) != IR36021_INTEL_MODE) {
printf("VID: IR Chip is not used in Intel mode.\n");ret = -1;goto exit;- }
- /* get the voltage ID from fuse status register */ fusesr = in_be32(&gur->dcfg_fusesr); /*
This change is not specifically for T4240RDB. Please separate IR change to another patch.
York