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 --- arch/arm/cpu/armv7/mx6/soc.c | 31 ++++++++++++++++++++++++++----- arch/arm/include/asm/arch-mx6/crm_regs.h | 1 + 2 files changed, 27 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) diff --git a/arch/arm/include/asm/arch-mx6/crm_regs.h b/arch/arm/include/asm/arch-mx6/crm_regs.h index f74737a..29674ce 100644 --- a/arch/arm/include/asm/arch-mx6/crm_regs.h +++ b/arch/arm/include/asm/arch-mx6/crm_regs.h @@ -1272,6 +1272,7 @@ struct mxc_ccm_reg {
#define BM_ANADIG_ANA_MISC0_REFTOP_SELBIASOFF 0x00000008 #define BM_ANADIG_ANA_MISC0_REFTOP_VBGADJ 0x60 +#define BM_ANADIG_ANA_MISC0_REFTOP_VBGADJ_SHIFT 4
#define BM_PMU_MISC2_AUDIO_DIV_MSB (1 << 23) #define BP_PMU_MISC2_AUDIO_DIV_MSB 23