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| Started by | Andrey Utkin <andrey_utkin@fastmail.com> |
|---|---|
| First post | 2016-05-26 16:10 +0200 |
| Last post | 2016-05-27 02:20 +0200 |
| Articles | 2 — 2 participants |
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How should I use kernel-defined i2c structs in this driver Andrey Utkin <andrey_utkin@fastmail.com> - 2016-05-26 16:10 +0200
Re: How should I use kernel-defined i2c structs in this driver Antti Palosaari <crope@iki.fi> - 2016-05-27 02:20 +0200
| From | Andrey Utkin <andrey_utkin@fastmail.com> |
|---|---|
| Date | 2016-05-26 16:10 +0200 |
| Subject | How should I use kernel-defined i2c structs in this driver |
| Message-ID | <rD493-7pp-7@gated-at.bofh.it> |
Could anybody please give a hint - which kernel-defined i2c objects, and how many of them, I need to define and use to substitute these driver-defined functions i2c_read(), i2c_write() ? https://github.com/bluecherrydvr/linux/blob/release/tw5864/1.16/drivers/media/pci/tw5864/tw5864-config.c In a word, there's 4 chips with different addresses, to which this code communicates via main chip's dedicated registers. Do i need a single i2c_adapter or several? Do i need i2c_client entities? where should I put what is named "devid" here? Thanks in advance.
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| From | Antti Palosaari <crope@iki.fi> |
|---|---|
| Date | 2016-05-27 02:20 +0200 |
| Message-ID | <rDdFn-4Hi-1@gated-at.bofh.it> |
| In reply to | #1407568 |
On 05/26/2016 04:59 PM, Andrey Utkin wrote: > Could anybody please give a hint - which kernel-defined i2c objects, and how > many of them, I need to define and use to substitute these driver-defined > functions i2c_read(), i2c_write() ? > https://github.com/bluecherrydvr/linux/blob/release/tw5864/1.16/drivers/media/pci/tw5864/tw5864-config.c > In a word, there's 4 chips with different addresses, to which this code > communicates via main chip's dedicated registers. > Do i need a single i2c_adapter or several? > Do i need i2c_client entities? > where should I put what is named "devid" here? > > Thanks in advance. It depends how those are connected at hardware level. Quickly looking I think "devid" is here to select proper I2C adapter. So I think there is 4 I2C adapters and each of those adapter has 1 slave device. Is that correct? If yes, then register 4 I2C adapters and register single client for each of those adapters. regards Antti -- http://palosaari.fi/
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