Hi, Dmitry,

Just send the v4 and please feel free to prompt me a message 
if there is anything wrong.

Remove the fw_id checking redundant codes in this version 
since it has no meaning. I just want to make sure that values are all correct originally.

Best Regard,
Hn.chen

-----Original Message-----
From: Dmitry Torokhov [mailto:dmitry.torokhov@gmail.com] 
Sent: Saturday, May 23, 2015 7:37 AM
To: Hn Chen
Cc: linux-input@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] Fix endian issues and remove the board specific codes

Hi Hn,

On Thu, May 21, 2015 at 03:43:08PM +0800, Hn Chen wrote:

Hi, Dmitry,

Thanks for your comments. 
Here are my replies for some comments.

quoted

+	fw_id = ((fw_chunk_info.chunk_info.version_number >> 12) & 0xF);
+	chip_id = (((dev_wdt87xx->sys_param.fw_id) >> 12) & 0xF);
+
+	if (fw_id != chip_id) {
+		wdt87xx_get_sysparam(client, dev_wdt87xx);

quoted

Why would it be different now?

This driver is intend to support two controllers, WDT8753 & WDT8756. 
The chip_id and the the firmware are different for them, so we have to 
check if The firmware is suitable for this controller.

What I meant is as far as I understand dev_wdt87xx->sys_param.fw_id is what we've read from the controller when we probed the device. What is the point in trying to re-read it with wdt87xx_get_sysparam()? Do we expect it to somehow change?

quoted

+
+	return (unsigned short) y;

quoted

I think I might have asked this before, by anyway: are we sure that we don't already have this checksum implementation in lib/? And if we don't maybe we should?

The MISR is a checksum function which the full name is "Multiple Input Signature Register". 
I checked the kernel library and not found any algorithm like this.
You mean I have to submit the checksum function into kernel/lib ?

No, you do not have to. I just wanted to make sure we are not duplicating something that already exists.

quoted

Can you tell me a bit more about the way device sends touch data? Does it always send all 10 contacts regardless of data in raw_buf[TOUCH_PK_OFFSET_FNGR_NUM]?

Yes, it always send all 10 contacts data.

I see.

--
Dmitry