Add ldo_mode_set function. 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 --- board/freescale/mx6sxsabresd/mx6sxsabresd.c | 50 +++++++++++++++++++++++++++++ include/configs/mx6sxsabresd.h | 2 ++ 2 files changed, 52 insertions(+)
diff --git a/board/freescale/mx6sxsabresd/mx6sxsabresd.c b/board/freescale/mx6sxsabresd/mx6sxsabresd.c index fbf3337..36432c4 100644 --- a/board/freescale/mx6sxsabresd/mx6sxsabresd.c +++ b/board/freescale/mx6sxsabresd/mx6sxsabresd.c @@ -196,6 +196,7 @@ static struct i2c_pads_info i2c_pad_info1 = { }, };
+static struct pmic *pfuze; int power_init_board(void) { struct pmic *p; @@ -204,6 +205,7 @@ 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) @@ -218,6 +220,54 @@ 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; + u32 vddarm; + struct pmic *p = pfuze; + + if (!p) + return; + + /* switch to ldo_bypass mode */ + if (ldo_bypass) { + prep_anatop_bypass(); + /* decrease VDDARM to 1.275V */ + pmic_reg_read(p, PFUZE100_SW1ABVOL, &value); + value &= ~0x3f; + value |= PFUZE100_SW1ABC_SETP(12750); + pmic_reg_write(p, PFUZE100_SW1ABVOL, value); + + /* decrease 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); + + is_400M = set_anatop_bypass(1); + if (is_400M) + vddarm = PFUZE100_SW1ABC_SETP(10750); + else + vddarm = PFUZE100_SW1ABC_SETP(11750); + + pmic_reg_read(p, PFUZE100_SW1ABVOL, &value); + value &= ~0x3f; + value |= vddarm; + pmic_reg_write(p, PFUZE100_SW1ABVOL, value); + + 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_USB_EHCI_MX6 #define USB_OTHERREGS_OFFSET 0x800 #define UCTRL_PWR_POL (1 << 9) diff --git a/include/configs/mx6sxsabresd.h b/include/configs/mx6sxsabresd.h index 469d250..d69310e 100644 --- a/include/configs/mx6sxsabresd.h +++ b/include/configs/mx6sxsabresd.h @@ -181,6 +181,8 @@ #define CONFIG_POWER_PFUZE100 #define CONFIG_POWER_PFUZE100_I2C_ADDR 0x08
+#define CONFIG_LDO_BYPASS_CHECK + /* Network */ #define CONFIG_CMD_PING #define CONFIG_CMD_DHCP