The u-boot supports i2c-over-hid?
Hello, I would like to ask whether i2c-over-hid is not supported under u-boot at present. At present, we have this development need. I would like to ask whether it is feasible to transplant i2c-over-hid from kernel. If not, is there any other way?
Hi,
+Heinrich Schuchardt +Heiko Schocher
On Thu, 13 Apr 2023 at 08:58, skyonce@126.com skyonce@126.com wrote:
Hello, I would like to ask whether i2c-over-hid is not supported under u-boot at present. At present, we have this development need. I would like to ask whether it is feasible to transplant i2c-over-hid from kernel. If not, is there any other way?
I don't see any support for it. Yes, bringing things in from Linux is a common approach. Some changes are needed for driver model and some differing APIs.
Regards, Simon
hi， For i2c interface keyboard, how should we implement u-boot driver？ Do you have any suggestions
skyonce@126.com
From: Simon Glass Date: 2023-04-19 09:45 To: skyonce@126.com CC: u-boot Subject: Re: The u-boot supports i2c-over-hid? Hi,
+Heinrich Schuchardt +Heiko Schocher
On Thu, 13 Apr 2023 at 08:58, skyonce@126.com skyonce@126.com wrote:
Hello, I would like to ask whether i2c-over-hid is not supported under u-boot at present. At present, we have this development need. I would like to ask whether it is feasible to transplant i2c-over-hid from kernel. If not, is there any other way?
I don't see any support for it. Yes, bringing things in from Linux is a common approach. Some changes are needed for driver model and some differing APIs.
Regards, Simon
Hi,
On Wed, 19 Apr 2023 at 20:33, skyonce@126.com skyonce@126.com wrote:
hi， For i2c interface keyboard, how should we implement u-boot driver？
Do you have any suggestions
Please try to avoid top posting. See below.
skyonce@126.com
From: Simon Glass Date: 2023-04-19 09:45 To: skyonce@126.com CC: u-boot Subject: Re: The u-boot supports i2c-over-hid? Hi,
+Heinrich Schuchardt +Heiko Schocher
On Thu, 13 Apr 2023 at 08:58, skyonce@126.com skyonce@126.com wrote:
Hello, I would like to ask whether i2c-over-hid is not supported under u-boot at present. At present, we have this development need. I would like to ask whether it is feasible to transplant i2c-over-hid from kernel. If not, is there any other way?
I don't see any support for it. Yes, bringing things in from Linux is a common approach. Some changes are needed for driver model and some differing APIs.
Do you mean HID over I2C? I cannot see anything for the other way around. But for i2c over hid, see cros_ec_i2c.c which implements I2C over a Chromium OS EC interface.
For HID over I2C, you could start with a simple driver which uses I2C to communicate with the device. It would need a new uclass, so it can be a proper driver. For plumbing it into U-Boot, keyboard-uclass.c shows how this is done today.
Regards, Simon
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