diff options
Diffstat (limited to 'board/ti/am335x/board.c')
| -rw-r--r-- | board/ti/am335x/board.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c index ed4229e258..6e30ac0265 100644 --- a/board/ti/am335x/board.c +++ b/board/ti/am335x/board.c @@ -34,6 +34,8 @@ #include <miiphy.h> #include <cpsw.h> #include "board.h" +#include "pmic.h" +#include "tps65217.h" DECLARE_GLOBAL_DATA_PTR; @@ -117,6 +119,132 @@ static int read_eeprom(void) /* UART Defines */ #ifdef CONFIG_SPL_BUILD +/** + * tps65217_reg_read() - Generic function that can read a TPS65217 register + * @src_reg: Source register address + * @src_val: Address of destination variable + */ + +unsigned char tps65217_reg_read(uchar src_reg, uchar *src_val) +{ + if (i2c_read(TPS65217_CHIP_PM, src_reg, 1, src_val, 1)) + return 1; + return 0; +} + +/** + * tps65217_reg_write() - Generic function that can write a TPS65217 PMIC + * register or bit field regardless of protection + * level. + * + * @prot_level: Register password protection. + * use PROT_LEVEL_NONE, PROT_LEVEL_1, or PROT_LEVEL_2 + * @dest_reg: Register address to write. + * @dest_val: Value to write. + * @mask: Bit mask (8 bits) to be applied. Function will only + * change bits that are set in the bit mask. + * + * @return: 0 for success, 1 for failure. + */ +int tps65217_reg_write(uchar prot_level, uchar dest_reg, + uchar dest_val, uchar mask) +{ + uchar read_val; + uchar xor_reg; + + /* if we are affecting only a bit field, read dest_reg and apply the mask */ + if (mask != MASK_ALL_BITS) { + if (i2c_read(TPS65217_CHIP_PM, dest_reg, 1, &read_val, 1)) + return 1; + read_val &= (~mask); + read_val |= (dest_val & mask); + dest_val = read_val; + } + + if (prot_level > 0) { + xor_reg = dest_reg ^ PASSWORD_UNLOCK; + if (i2c_write(TPS65217_CHIP_PM, PASSWORD, 1, &xor_reg, 1)) + return 1; + } + + if (i2c_write(TPS65217_CHIP_PM, dest_reg, 1, &dest_val, 1)) + return 1; + + if (prot_level == PROT_LEVEL_2) { + if (i2c_write(TPS65217_CHIP_PM, PASSWORD, 1, &xor_reg, 1)) + return 1; + + if (i2c_write(TPS65217_CHIP_PM, dest_reg, 1, &dest_val, 1)) + return 1; + } + + return 0; +} + +int tps65217_voltage_update(unsigned char dc_cntrl_reg, unsigned char volt_sel) +{ + if ((dc_cntrl_reg != DEFDCDC1) && (dc_cntrl_reg != DEFDCDC2) + && (dc_cntrl_reg != DEFDCDC3)) + return 1; + + /* set voltage level */ + if (tps65217_reg_write(PROT_LEVEL_2, dc_cntrl_reg, volt_sel, MASK_ALL_BITS)) + return 1; + + /* set GO bit to initiate voltage transition */ + if (tps65217_reg_write(PROT_LEVEL_2, DEFSLEW, DCDC_GO, DCDC_GO)) + return 1; + + return 0; +} + +/* + * voltage switching for MPU frequency switching. + * @module = mpu - 0, core - 1 + * @vddx_op_vol_sel = vdd voltage to set + */ + +#define MPU 0 +#define CORE 1 + +int voltage_update(unsigned int module, unsigned char vddx_op_vol_sel) +{ + uchar buf[4]; + unsigned int reg_offset; + + if(module == MPU) + reg_offset = PMIC_VDD1_OP_REG; + else + reg_offset = PMIC_VDD2_OP_REG; + + /* Select VDDx OP */ + if (i2c_read(PMIC_CTRL_I2C_ADDR, reg_offset, 1, buf, 1)) + return 1; + + buf[0] &= ~PMIC_OP_REG_CMD_MASK; + + if (i2c_write(PMIC_CTRL_I2C_ADDR, reg_offset, 1, buf, 1)) + return 1; + + /* Configure VDDx OP Voltage */ + if (i2c_read(PMIC_CTRL_I2C_ADDR, reg_offset, 1, buf, 1)) + return 1; + + buf[0] &= ~PMIC_OP_REG_SEL_MASK; + buf[0] |= vddx_op_vol_sel; + + if (i2c_write(PMIC_CTRL_I2C_ADDR, reg_offset, 1, buf, 1)) + return 1; + + if (i2c_read(PMIC_CTRL_I2C_ADDR, reg_offset, 1, buf, 1)) + return 1; + + if ((buf[0] & PMIC_OP_REG_SEL_MASK ) != vddx_op_vol_sel) + return 1; + + return 0; +} + #define UART_RESET (0x1 << 1) #define UART_CLK_RUNNING_MASK 0x1 #define UART_SMART_IDLE_EN (0x1 << 0x3) |