diff options
Diffstat (limited to 'board/freescale')
| -rw-r--r-- | board/freescale/common/vid.c | 17 | ||||
| -rw-r--r-- | board/freescale/common/vid.h | 4 |
2 files changed, 20 insertions, 1 deletions
diff --git a/board/freescale/common/vid.c b/board/freescale/common/vid.c index f1bed51..1ea1b88 100644 --- a/board/freescale/common/vid.c +++ b/board/freescale/common/vid.c @@ -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); /* diff --git a/board/freescale/common/vid.h b/board/freescale/common/vid.h index a9c7bb4..9182c20 100644 --- a/board/freescale/common/vid.h +++ b/board/freescale/common/vid.h @@ -11,6 +11,10 @@ #define IR36021_LOOP1_VOUT_OFFSET 0x9A #define IR36021_MFR_ID_OFFSET 0x92 #define IR36021_MFR_ID 0x43 +#define IR36021_INTEL_MODE_OOFSET 0x14 +#define IR36021_MODE_MASK 0x20 +#define IR36021_INTEL_MODE 0x00 +#define IR36021_AMD_MODE 0x20 /* step the IR regulator in 5mV increments */ #define IR_VDD_STEP_DOWN 5 |