IR chip is on one of the channels on multiplexed I2C-bus. Reset to default channel after accessing.
Signed-off-by: Wenbin Song wenbin.song@nxp.com --- Changes for v2: -Rework the commit message and the tag int the subject. --- board/freescale/common/vid.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/board/freescale/common/vid.c b/board/freescale/common/vid.c index 1bd65a8..a6a132a 100644 --- a/board/freescale/common/vid.c +++ b/board/freescale/common/vid.c @@ -454,6 +454,9 @@ int adjust_vdd(ulong vdd_override) exit: if (re_enable) enable_interrupts(); + + i2c_multiplexer_select_vid_channel(I2C_MUX_CH_DEFAULT); + return ret; }
@@ -469,7 +472,7 @@ static int print_vdd(void) ret = find_ir_chip_on_i2c(); if (ret < 0) { printf("VID: Could not find voltage regulator on I2C.\n"); - return -1; + goto exit; } else { i2caddress = ret; debug("VID: IR Chip found on I2C address 0x%02x\n", i2caddress); @@ -481,11 +484,14 @@ static int print_vdd(void) vdd_last = read_voltage(i2caddress); if (vdd_last < 0) { printf("VID: Couldn't read sensor abort VID adjustment\n"); - return -1; + goto exit; } printf("VID: Core voltage is at %d mV\n", vdd_last); +exit: + i2c_multiplexer_select_vid_channel(I2C_MUX_CH_DEFAULT); + + return ret < 0 ? -1 : 0;
- return 0; }
static int do_vdd_override(cmd_tbl_t *cmdtp,