# Re: \[PATCH 03/10\] input: iqs5xx: Accommodate bootloader latency

- From: Dmitry Torokhov \<dmitry.torokhov@gmail.com\>
- Date: 2021-01-25 04:20:09 
- List: linux-input
- Page: https://ratatoskr.run/linux-input/2021/01/8932468
- Thread: https://ratatoskr.run/linux-input/2021/01/8932445/t.md

```text
On Mon, Jan 18, 2021 at 02:43:39PM -0600, Jeff LaBundy wrote:
> The bootloader NAK's all I2C communication after the first 64-byte
> bulk write if the bus frequency is equal to 400 kHz. This prevents
> the platform from pushing updated firmware to the device.
> 
> The vendor's USB bootloader programming dongle appears to insert a
> delay between the "open" command and the first 64-byte bulk write.
> Adding a similar delay to the driver seems to eliminate the issue.
> 
> Furthermore, the dongle does not access the bootloader immediately
> after powering up the device. Follow suit by adding a delay before
> the "open" command to avoid wasted retries at 400 kHz.
> 
> Signed-off-by: Jeff LaBundy <redacted>

Applied, thank you.

-- 
Dmitry
```