diff options
| author | Tom Rini <trini@konsulko.com> | 2018-01-23 21:48:53 -0500 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-01-23 21:48:53 -0500 |
| commit | 16121280188d3daa57b18ad623d0845bbbb5a90a (patch) | |
| tree | 1eced38d4dbbb8aa8813ed7095aedd06f0226ec1 /arch/arm/cpu/armv8/fsl-layerscape/soc.c | |
| parent | a516416d75a9b0f52e9d63d47f8a7bd53239767c (diff) | |
| parent | 6c8945ec41cb7bff27fbacc88316e3e557c20240 (diff) | |
Merge git://git.denx.de/u-boot-fsl-qoriq
Diffstat (limited to 'arch/arm/cpu/armv8/fsl-layerscape/soc.c')
| -rw-r--r-- | arch/arm/cpu/armv8/fsl-layerscape/soc.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c index dc4a437344..b9f837d58d 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c +++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c @@ -363,6 +363,45 @@ int sata_init(void) } #endif +/* Get VDD in the unit mV from voltage ID */ +int get_core_volt_from_fuse(void) +{ + struct ccsr_gur *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR); + int vdd; + u32 fusesr; + u8 vid; + + /* get the voltage ID from fuse status register */ + fusesr = in_le32(&gur->dcfg_fusesr); + debug("%s: fusesr = 0x%x\n", __func__, fusesr); + vid = (fusesr >> FSL_CHASSIS3_DCFG_FUSESR_ALTVID_SHIFT) & + FSL_CHASSIS3_DCFG_FUSESR_ALTVID_MASK; + if ((vid == 0) || (vid == FSL_CHASSIS3_DCFG_FUSESR_ALTVID_MASK)) { + vid = (fusesr >> FSL_CHASSIS3_DCFG_FUSESR_VID_SHIFT) & + FSL_CHASSIS3_DCFG_FUSESR_VID_MASK; + } + debug("%s: VID = 0x%x\n", __func__, vid); + switch (vid) { + case 0x00: /* VID isn't supported */ + vdd = -EINVAL; + debug("%s: The VID feature is not supported\n", __func__); + break; + case 0x08: /* 0.9V silicon */ + vdd = 900; + break; + case 0x10: /* 1.0V silicon */ + vdd = 1000; + break; + default: /* Other core voltage */ + vdd = -EINVAL; + debug("%s: The VID(%x) isn't supported\n", __func__, vid); + break; + } + debug("%s: The required minimum volt of CORE is %dmV\n", __func__, vdd); + + return vdd; +} + #elif defined(CONFIG_FSL_LSCH2) #ifdef CONFIG_SCSI_AHCI_PLAT int sata_init(void) |