N900 Hardware Bus I2c

(New page: =Hardware= /sys/bus/i2c/drivers# ls -d */*-* ad5820/3-000c dummy/1-004a radio-si4713/2-0063 adp1653/2-0030 dummy/1-004b smia-sensor/2-0010 aic3...)
(Hardware)
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=Hardware=
=Hardware=
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Bus 1.
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* 0x48 [[N900 Hardware Chipset|Gaia/chipset]]
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dummy/1-004a
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dummy/1-0049
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dummy/1-004b
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Bus 2.
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tsl2563/2-0029
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smia-sensor/2-0010
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aic3x I2C Codec/2-0018
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aic34b_dummy/2-0019   
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adp1653/2-0030 
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* 0x63 [[N900 Hardware FM Retriever|FM receiver]]
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tpa6130a2/2-0060
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lp5523/2-0032
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Bus 3.
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ad5820/3-000c
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et8ek8/3-003e
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lis302dl/3-001d
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  /sys/bus/i2c/drivers# ls -d */*-*
  /sys/bus/i2c/drivers# ls -d */*-*
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ad5820/3-000c          dummy/1-004a            radio-si4713/2-0063
 
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adp1653/2-0030          dummy/1-004b            smia-sensor/2-0010
 
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aic34b_dummy/2-0019    et8ek8/3-003e          tpa6130a2/2-0060
 
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aic3x I2C Codec/2-0018  lis302dl/3-001d        tsl2563/2-0029
 
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dummy/1-0049            lp5523/2-0032          twl4030/1-0048
 
=Software=
=Software=

Revision as of 15:39, 7 June 2010

Hardware

Bus 1.

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  

tpa6130a2/2-0060 lp5523/2-0032

Bus 3.

ad5820/3-000c 

et8ek8/3-003e lis302dl/3-001d

/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).