If runs at 1.2GHz, enable ldo, and adjust voltage.
If ldo_bypass is true, it will adjust voltage. If not, do nothing.
This function is board specific, so implement it in board file.
Signed-off-by: Peng Fan Peng.Fan@freescale.com Signed-off-by: Robin Gong b38343@freescale.com Signed-off-by: Nitin Garg nitin.garg@freescale.com --- board/freescale/mx6sabresd/mx6sabresd.c | 85 +++++++++++++++++++++++++++++++++ include/configs/mx6sabresd.h | 2 + 2 files changed, 87 insertions(+)
diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c index 59544d9..9e0a8ae 100644 --- a/board/freescale/mx6sabresd/mx6sabresd.c +++ b/board/freescale/mx6sabresd/mx6sabresd.c @@ -628,6 +628,7 @@ int board_init(void) return 0; }
+static struct pmic *pfuze; int power_init_board(void) { struct pmic *p; @@ -636,6 +637,7 @@ int power_init_board(void) p = pfuze_common_init(I2C_PMIC); if (!p) return -ENODEV; + pfuze = p;
ret = pfuze_mode_init(p, APS_PFM); if (ret < 0) @@ -656,6 +658,89 @@ int power_init_board(void) return 0; }
+#ifdef CONFIG_LDO_BYPASS_CHECK +void ldo_mode_set(int ldo_bypass) +{ + unsigned int value; + int is_400M; + unsigned char vddarm; + struct pmic *p = pfuze; + + /* increase VDDARM/VDDSOC to support 1.2G chip */ + if (check_1_2G()) { + ldo_bypass = 0; /* ldo_enable on 1.2G chip */ + printf("1.2G chip, increase VDDARM_IN/VDDSOC_IN\n"); + /* increase VDDARM to 1.425V */ + pmic_reg_read(p, PFUZE100_SW1ABVOL, &value); + value &= ~0x3f; + value |= PFUZE100_SW1ABC_SETP(14250); + pmic_reg_write(p, PFUZE100_SW1ABVOL, value); + + /* increase VDDSOC to 1.425V */ + pmic_reg_read(p, PFUZE100_SW1CVOL, &value); + value &= ~0x3f; + value |= PFUZE100_SW1ABC_SETP(14250); + pmic_reg_write(p, PFUZE100_SW1CVOL, value); + } + /* switch to ldo_bypass mode , boot on 800Mhz */ + if (ldo_bypass) { + prep_anatop_bypass(); + + /* decrease VDDARM for 400Mhz DQ:1.1V, DL:1.275V */ + pmic_reg_read(p, PFUZE100_SW1ABVOL, &value); + value &= ~0x3f; +#if defined(CONFIG_MX6DL) + value |= PFUZE100_SW1ABC_SETP(12750); +#else + value |= PFUZE100_SW1ABC_SETP(11000); +#endif + pmic_reg_write(p, PFUZE100_SW1ABVOL, value); + + /* increase VDDSOC to 1.3V */ + pmic_reg_read(p, PFUZE100_SW1CVOL, &value); + value &= ~0x3f; + value |= PFUZE100_SW1ABC_SETP(13000); + pmic_reg_write(p, PFUZE100_SW1CVOL, value); + + /* + * MX6Q: + * VDDARM:1.15V@800M; VDDSOC:1.175V@800M + * VDDARM:0.975V@400M; VDDSOC:1.175V@400M + * MX6DL: + * VDDARM:1.175V@800M; VDDSOC:1.175V@800M + * VDDARM:1.075V@400M; VDDSOC:1.175V@400M + */ + is_400M = set_anatop_bypass(2); + if (is_400M) +#if defined(CONFIG_MX6DL) + vddarm = PFUZE100_SW1ABC_SETP(10750); +#else + vddarm = PFUZE100_SW1ABC_SETP(9750); +#endif + else +#if defined(CONFIG_MX6DL) + vddarm = PFUZE100_SW1ABC_SETP(11750); +#else + vddarm = PFUZE100_SW1ABC_SETP(11500); +#endif + + pmic_reg_read(p, PFUZE100_SW1ABVOL, &value); + value &= ~0x3f; + value |= vddarm; + pmic_reg_write(p, PFUZE100_SW1ABVOL, value); + + /* decrease VDDSOC to 1.175V */ + pmic_reg_read(p, PFUZE100_SW1CVOL, &value); + value &= ~0x3f; + value |= PFUZE100_SW1ABC_SETP(11750); + pmic_reg_write(p, PFUZE100_SW1CVOL, value); + + finish_anatop_bypass(); + printf("switch to ldo_bypass mode!\n"); + } +} +#endif + #ifdef CONFIG_MXC_SPI int board_spi_cs_gpio(unsigned bus, unsigned cs) { diff --git a/include/configs/mx6sabresd.h b/include/configs/mx6sabresd.h index 99d9d4d..70dbf30 100644 --- a/include/configs/mx6sabresd.h +++ b/include/configs/mx6sabresd.h @@ -60,6 +60,8 @@ #define CONFIG_POWER_PFUZE100 #define CONFIG_POWER_PFUZE100_I2C_ADDR 0x08
+#define CONFIG_LDO_BYPASS_CHECK + /* USB Configs */ #define CONFIG_CMD_USB #ifdef CONFIG_CMD_USB