N900 Hardware Bus I2c
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* 0x63 [[N900 Hardware FM Retriever|FM receiver]] | * 0x63 [[N900 Hardware FM Retriever|FM receiver]] | ||
tpa6130a2/2-0060 | tpa6130a2/2-0060 | ||
| - | + | * 0x32 [[N900 Hardware LED]] | |
Bus 3. | Bus 3. | ||
| - | + | * 0x0c [[N900 Hardware Autofocus|Lens focus control]] | |
| - | + | * 0x3e [[N900 Hardware Camera Sensor|Front Camera (control)]] | |
| - | + | * 0x1d [[N900 Hardware Accelerometer|Accelerometer]] | |
/sys/bus/i2c/drivers# ls -d */*-* | /sys/bus/i2c/drivers# ls -d */*-* | ||
Revision as of 15:50, 7 June 2010
Hardware
Bus 1.
- 0x48 Gaia/chipset
dummy/1-004a dummy/1-0049 dummy/1-004b
Bus 2.
tsl2563/2-0029 smia-sensor/2-0010 aic3x I2C Codec/2-0018 aic34b_dummy/2-0019
adp1653/2-0030
- 0x63 FM receiver
tpa6130a2/2-0060
- 0x32 N900 Hardware LED
Bus 3.
- 0x0c Lens focus control
- 0x3e Front Camera (control)
- 0x1d Accelerometer
/sys/bus/i2c/drivers# ls -d */*-*
Software
The n900 software driving I2C comes in three flavours.
Firstly, there are a large number of kernel drivers.
Then, there are a small number of devices 'bit banged' through I2C ioctls - BME for example does this.
Finally, there are probably some I2C components in the Rapuyama and assorted cellphone/GPS hardware. These are not visible to the casual developer. (you have to open the n900 and probe stuff, or hack the phone firmware).