diff options
Diffstat (limited to 'board/freescale/common/vid.c')
| -rw-r--r-- | board/freescale/common/vid.c | 44 |
1 files changed, 40 insertions, 4 deletions
diff --git a/board/freescale/common/vid.c b/board/freescale/common/vid.c index 20c97aa1ef..9c51f50260 100644 --- a/board/freescale/common/vid.c +++ b/board/freescale/common/vid.c @@ -379,6 +379,7 @@ static int set_voltage_to_LTC(int i2caddress, int vdd) { int ret, vdd_last, vdd_target = vdd; int count = 100, temp = 0; + unsigned char value; /* Scale up to the LTC resolution is 1/4096V */ vdd = (vdd * 4096) / 1000; @@ -391,16 +392,51 @@ static int set_voltage_to_LTC(int i2caddress, int vdd) /* Write the desired voltage code to the regulator */ #ifndef CONFIG_DM_I2C + /* Check write protect state */ + ret = i2c_read(I2C_VOL_MONITOR_ADDR, + PMBUS_CMD_WRITE_PROTECT, 1, + (void *)&value, sizeof(value)); + if (ret) + goto exit; + + if (value != EN_WRITE_ALL_CMD) { + value = EN_WRITE_ALL_CMD; + ret = i2c_write(I2C_VOL_MONITOR_ADDR, + PMBUS_CMD_WRITE_PROTECT, 1, + (void *)&value, sizeof(value)); + if (ret) + goto exit; + } + ret = i2c_write(I2C_VOL_MONITOR_ADDR, - PMBUS_CMD_PAGE_PLUS_WRITE, 1, (void *)&buff, 5); + PMBUS_CMD_PAGE_PLUS_WRITE, 1, + (void *)&buff, sizeof(buff)); #else struct udevice *dev; ret = i2c_get_chip_for_busnum(0, I2C_VOL_MONITOR_ADDR, 1, &dev); - if (!ret) + if (!ret) { + /* Check write protect state */ + ret = dm_i2c_read(dev, + PMBUS_CMD_WRITE_PROTECT, + (void *)&value, sizeof(value)); + if (ret) + goto exit; + + if (value != EN_WRITE_ALL_CMD) { + value = EN_WRITE_ALL_CMD; + ret = dm_i2c_write(dev, + PMBUS_CMD_WRITE_PROTECT, + (void *)&value, sizeof(value)); + if (ret) + goto exit; + } + ret = dm_i2c_write(dev, PMBUS_CMD_PAGE_PLUS_WRITE, - (void *)&buff, 5); + (void *)&buff, sizeof(buff)); + } #endif +exit: if (ret) { printf("VID: I2C failed to write to the volatge regulator\n"); return -1; @@ -892,7 +928,7 @@ exit: static int print_vdd(void) { - int vdd_last, ret, i2caddress; + int vdd_last, ret, i2caddress = 0; ret = i2c_multiplexer_select_vid_channel(I2C_MUX_CH_VOL_MONITOR); if (ret) { |