diff options
| author | Rajesh Bhagat <rajesh.bhagat@nxp.com> | 2017-11-30 06:30:48 (GMT) |
|---|---|---|
| committer | Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com> | 2018-01-18 05:29:08 (GMT) |
| commit | fe1dc630a3e2fb4b845a1d612aff3c8160463c7d (patch) | |
| tree | fd4e7cdb03bf61faaca0b97504d072ab32556622 /arch/arm/cpu/armv8/fsl-layerscape/soc.c | |
| parent | 344badd84b079639ba51af9a5591df12fbe2cfa3 (diff) | |
| download | u-boot-fe1dc630a3e2fb4b845a1d612aff3c8160463c7d.tar.xz | |
armv8: lsch3: Add serdes and DDR voltage setup
Adds SERDES voltage and reset SERDES lanes API and makes
enable/disable DDR controller support 0.9V API common.
Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Signed-off-by: Pankit Garg <pankit.garg@nxp.com>
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 a9adb0a..67d32d6 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c +++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c @@ -361,6 +361,45 @@ 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) |