linux-kernel - Re: [PATCH 3/4] staging: media: go7007: i2c GPIO initialization Reset i2c stuff for GO7007_BOARDID_ADLINK_MPG24 need reset GPIO always when encoder initialize

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Date:	Wed, 16 Jan 2013 18:00:13 +0400
From:	Volokh Konstantin <volokh84@...il.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
	mchehab@...hat.com, gregkh@...uxfoundation.org,
	linux-kernel@...r.kernel.org, dhowells@...hat.com,
	rdunlap@...otime.net, hans.verkuil@...co.com,
	justinmattock@...il.com
Subject: Re: [PATCH 3/4] staging: media: go7007: i2c GPIO initialization
 Reset i2c stuff for GO7007_BOARDID_ADLINK_MPG24 need reset GPIO always when
 encoder initialize

On Wed, Jan 16, 2013 at 04:36:08PM +0300, Dan Carpenter wrote:
> You've added the writes for GO7007_BOARDID_ADLINK_MPG24 but removed
> them for GO7007_BOARDID_XMEN and GO7007_BOARDID_XMEN_III.  Won't
> that break those boards?
>
I don`t remove code for GO7007_BOARDID_XMEN and GO7007_BOARDID_XMEN_III.
case there are auto reusing for XMen and XMen-III:
look old code:
if ((go->board_id == GO7007_BOARDID_XMEN ||
				go->board_id == GO7007_BOARDID_XMEN_III) &&
			go->i2c_adapter_online) {
		union i2c_smbus_data data;

		/* Check to see if register 0x0A is 0x76 */
		i2c_smbus_xfer(&go->i2c_adapter, 0x21, I2C_CLIENT_SCCB,
			I2C_SMBUS_READ, 0x0A, I2C_SMBUS_BYTE_DATA, &data);
		if (data.byte != 0x76) {
			if (assume_endura) {
				go->board_id = GO7007_BOARDID_ENDURA;
				usb->board = board = &board_endura;
				go->board_info = &board->main_info;
				strncpy(go->name, "Pelco Endura",
					sizeof(go->name));
			} else {
				u16 channel;
-				/* set GPIO5 to be an output, currently low */
-				go7007_write_addr(go, 0x3c82, 0x0000);
-				go7007_write_addr(go, 0x3c80, 0x00df);
				/* read channel number from GPIO[1:0] */
				go7007_read_addr(go, 0x3c81, &channel);
				channel &= 0x3;
>>>				go->board_id = GO7007_BOARDID_ADLINK_MPG24;
Here any XMen or XMen-III will reassigned as Adlink-mpg24 id
so any i2c initialization will reassigned to that id and we can use that id in
init_encoder.
				usb->board = board = &board_adlink_mpg24;
				go->board_info = &board->main_info;
				go->channel_number = channel;
				snprintf(go->name, sizeof(go->name),
					"Adlink PCI-MPG24, channel #%d",
					channel);
			}
		}
	}
> regards,
> dan carpenter
> 
> 
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