[#5321] modprobe i2c lcd on bf533 stamp wait long time
Submitted By: Mingquan Pan
Open Date
2009-07-07 05:28:10 Close Date
2009-07-10 06:19:29
Priority:
Medium High Assignee:
Barry Song
Status:
Closed Fixed In Release:
N/A
Found In Release:
N/A Release:
Category:
N/A Board:
N/A
Processor:
BF533 Silicon Revision:
Is this bug repeatable?:
Yes Resolution:
Fixed
Uboot version or rev.:
Toolchain version or rev.:
09R1-RC9
App binary format:
N/A
Summary: modprobe i2c lcd on bf533 stamp wait long time
Details:
modprobe i2c lcd (modprobe bfin_twi_lcd )on bf533 stamp wait long time with default linux-2.6.x/arch/blackfin/mach-bf533/boards/stamp.c
static struct i2c_gpio_platform_data i2c_gpio_data = {
.sda_pin = 2,
.scl_pin = 3,
}
And after insert this module, no 0-002f under /sys/bus/i2c/devices is seen.
While set .scl_pin to 4, it tests ok and works as expected.
But in last release, I don't remember this pin needs to be reset as in the ppifcd case.
So is there a problem or we do need set this pin to 4?
Follow-ups
--- Barry Song 2009-07-10 06:19:29
Check the schematics of BF533-STAMP, I2C_SCL and I2C_SDA can be routed to anyone
of PF0-PF7 depending on the connected 0ohm resistance.
Default boards connect PF2&PF3 as I2C signals. Grace is using a board
connecting PF2&PF4. So it causes we need to change stamp.c to make I2C
work.
Files
Changes
Commits
Dependencies
Duplicates
Associations
Tags
File Name File Type File Size Posted By
i2c.bmp image/bmp 813846 Barry Song
