diff options
| author | Peng Fan <peng.fan@nxp.com> | 2016-10-08 09:03:00 (GMT) |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2016-11-16 19:53:55 (GMT) |
| commit | 97c16dc8bf0981d9c3ba04f1b8cc54b751a00f3f (patch) | |
| tree | c033ef027a7e5931b4c95cd137f238ce883d58d2 /arch/arm/cpu/armv7/mx6/soc.c | |
| parent | 27e3a3c7f8a469c61509102a672d210bdff46059 (diff) | |
| download | u-boot-97c16dc8bf0981d9c3ba04f1b8cc54b751a00f3f.tar.xz | |
imx: mx6ull: update the REFTOP_VBGADJ setting
According to design team, we need to set REFTOP_VBGADJ
in PMU MISC0 according to the REFTOP_TRIM[2:0] fuse. the
actually table is as below:
'000" - set REFTOP_VBGADJ[2:0] to 3'b000
'001" - set REFTOP_VBGADJ[2:0] to 3'b001
'010" - set REFTOP_VBGADJ[2:0] to 3'b010
'011" - set REFTOP_VBGADJ[2:0] to 3'b011
'100" - set REFTOP_VBGADJ[2:0] to 3'b100
'101" - set REFTOP_VBGADJ[2:0] to 3'b101
'110" - set REFTOP_VBGADJ[2:0] to 3'b110
'111" - set REFTOP_VBGADJ[2:0] to 3'b111
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Bai Ping <ping.bai@nxp.com>
Diffstat (limited to 'arch/arm/cpu/armv7/mx6/soc.c')
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/soc.c | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c index 7b53bfd..dd94797 100644 --- a/arch/arm/cpu/armv7/mx6/soc.c +++ b/arch/arm/cpu/armv7/mx6/soc.c @@ -300,9 +300,17 @@ static void clear_mmdc_ch_mask(void) writel(reg, &mxc_ccm->ccdr); } +#define OCOTP_MEM0_REFTOP_TRIM_SHIFT 8 + static void init_bandgap(void) { struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR; + struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR; + struct fuse_bank *bank = &ocotp->bank[1]; + struct fuse_bank1_regs *fuse = + (struct fuse_bank1_regs *)bank->fuse_regs; + uint32_t val; + /* * Ensure the bandgap has stabilized. */ @@ -315,13 +323,26 @@ static void init_bandgap(void) */ writel(BM_ANADIG_ANA_MISC0_REFTOP_SELBIASOFF, &anatop->ana_misc0_set); /* - * On i.MX6ULL, the LDO 1.2V bandgap voltage is 30mV higher. so set - * VBGADJ bits to 2b'110 to adjust it. + * On i.MX6ULL,we need to set VBGADJ bits according to the + * REFTOP_TRIM[3:0] in fuse table + * 000 - set REFTOP_VBGADJ[2:0] to 3b'110, + * 110 - set REFTOP_VBGADJ[2:0] to 3b'000, + * 001 - set REFTOP_VBGADJ[2:0] to 3b'001, + * 010 - set REFTOP_VBGADJ[2:0] to 3b'010, + * 011 - set REFTOP_VBGADJ[2:0] to 3b'011, + * 100 - set REFTOP_VBGADJ[2:0] to 3b'100, + * 101 - set REFTOP_VBGADJ[2:0] to 3b'101, + * 111 - set REFTOP_VBGADJ[2:0] to 3b'111, */ - if (is_mx6ull()) - writel(BM_ANADIG_ANA_MISC0_REFTOP_VBGADJ, &anatop->ana_misc0_set); -} + if (is_mx6ull()) { + val = readl(&fuse->mem0); + val >>= OCOTP_MEM0_REFTOP_TRIM_SHIFT; + val &= 0x7; + writel(val << BM_ANADIG_ANA_MISC0_REFTOP_VBGADJ_SHIFT, + &anatop->ana_misc0_set); + } +} #ifdef CONFIG_MX6SL static void set_preclk_from_osc(void) |