Other Parts Discussed in Thread: DM385
Hi Guys,
+++++++++++Custom DM385 Board + IPNC RDK3.5 + Kernel 2.6.37 ++++++++++++++++++
I have been working on board, i came across one issue where i2c bus is not detecting any slave device on bus and i'm getting i2c bus probe failed.
In uboot:
DM385_IPNC#md 0x48140c18 1 //I2C0_SCL
48140c18: 000e0001 ....
DM385_IPNC#md 0x48140c1c 1 //I2C0_SDA
48140c1c: 000e0001 ....
DM385_IPNC#md 0x48140934 1 //I2C1_SCL
48140934: 000e0001 ....
DM385_IPNC#md 0x48140938 1 //I2C1_SDA
48140938: 000e0001 ....
For I2C0_SCL/SDA i checked pincntl value in datasheet.
default value is 0x000C0000 + with mode 0x01 -> so output should be 0x000C0001 but i'm getting 0x000e0001
Edit 1 -> TI814X_PULL_UP -> it changed c to e as it is setting 17th bit.
i tried to check in kernel pin muxing:
root@DM385_IPNC:~# cat /sys/kernel/debug/omap_mux/i2c0_scl
name: i2c0_scl.i2c0_scl (0x48140c18/0xc18 = 0xe0001), b NA, t NA
mode: TI814X_PIN_INPUT_PULL_UP | TI81XX_MUX_MODE0
signals: i2c0_scl | NA | NA | NA | NA | NA | NA | NA
root@DM385_IPNC:~# cat /sys/kernel/debug/omap_mux/i2c0_sda
name: i2c0_sda.i2c0_sda (0x48140c1c/0xc1c = 0xe0001), b NA, t NA
mode: TI814X_PIN_INPUT_PULL_UP | TI81XX_MUX_MODE0
signals: i2c0_sda | NA | NA | NA | NA | NA | NA | NA
root@DM385_IPNC:~# cat /sys/kernel/debug/omap_mux/i2c1_sda
name: i2c1_sda.hdmi_ddc_sda_mux0 (0x48140938/0x938 = 0xe0002), b NA, t NA
mode: TI814X_PIN_INPUT_PULL_UP | TI81XX_MUX_MODE1
signals: i2c1_sda | hdmi_ddc_sda_mux0 | NA | NA | NA | NA | NA | NA
root@DM385_IPNC:~# cat /sys/kernel/debug/omap_mux/i2c1_scl
name: i2c1_scl.hdmi_ddc_scl_mux0 (0x48140934/0x934 = 0xe0002), b NA, t NA
mode: TI814X_PIN_INPUT_PULL_UP | TI81XX_MUX_MODE1
signals: i2c1_scl | hdmi_ddc_scl_mux0 | NA | NA | NA | NA | NA | NA
Kernel log:
bma250: probe of 1-0019 failed with error 1
omap_i2c omap_i2c.1: controller timed out
bq32k: probe of 1-0068 failed with error -5
i2c /dev entries driver
when i perform i2cdetect -r 1:
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: omap_i2c omap_i2c.1: controller timed out
-- -- -- omap_i2c omap_i2c.1: controller timed out
-- omap_i2c omap_i2c.1: controller timed out
-- -- -- -- -- -- -- -- omap_i2c omap_i2c.1: Arbitration lost
--
10: -- -- omap_i2c omap_i2c.1: controller timed out
-- -- -- -- -- -- UU 19 omap_i2c omap_i2c.1: Arbitration lost
-- -- -- -- omap_i2c omap_i2c.1: controller timed out
-- omap_i2c omap_i2c.1: controller timed out
-- omap_i2c omap_i2c.1: Arbitration lost
Can anybody tell these issues are coming?
thanks & regards,
Ganesh
