----- Forwarded message from Godwin Stewart <gstewart at spamcop.net> -----
From: Godwin Stewart <gstewart at spamcop.net>
To: Frodo Looijaard <frodol at dds.nl>
Subject: Linux kernel / i2c_adapter structure
Organization: Nope, none here, it's a mess ;o)
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Hi there,
I noticed a change in the definition of the i2c_adapter structure in
$SRC/include/linux/i2c.h between the 2.4.x and 2.6.0 kernels. More
precisely, the following members are no longer present:
/* --- These may be NULL, but should increase the module use count */
void (*inc_use)(struct i2c_adapter *);
void (*dec_use)(struct i2c_adapter *);
void *data; /* private data for the adapter */
/* some data fields that are used by all types */
/* these data fields are readonly to the public */
/* and can be set via the i2c_ioctl call */
The problem is that the em8300 drivers for DXR3/Hollywood+ MPEG2 decoder
boards (see http://dxr3.sourceforge.net) use these members in their source.
My question is therefore, with what has their functionality been replaced?
For example :
static int em8300_i2c_reg(struct i2c_client *client)
{
struct em8300_s *em = client->adapter->data;
switch (client->driver->id) {
case I2C_DRIVERID_ADV717X:
if (!strncmp(client->name, "ADV7175", 7)) {
em->encoder_type = ENCODER_ADV7175;
}
if (!strncmp(client->name, "ADV7170", 7)) {
em->encoder_type = ENCODER_ADV7170;
}
em->encoder = client;
break;
case I2C_DRIVERID_BT865:
em->encoder_type = ENCODER_BT865;
em->encoder = client;
break;
default:
printk(KERN_ERR "em8300_i2c: unknown client id\n");
return -ENODEV;
}
return 0;
}
In the above code, client->adapter is a struct i2c_adapter*, and the data
field is definitely used in order to identify the encoder chip used on the
board. I therefore need some way of working around the problem in order to
have a go at patching the em8300 drivers.
Many thanks in advance, and Season's Greetings if we don't "speak" until
after the festivities.
--
G. Stewart -- gstewart at bonivet.net -- gstewart at spamcop.net
Registered Linux user #284683 (Slackware 9.0)
---------------------------------------------------------------
"I once had a rose named after me and I was very flattered.
But I was not pleased to read the description in the catalogue:
No good in a bed, but fine up against a wall."
-- Eleanor Roosevelt
----- End forwarded message -----
--
Frodo Looijaard <frodol at dds.nl> PGP key and more: http://huizen.dds.nl/~frodol
Defenestration n. (formal or joc.):
The act of removing Windows from your computer in disgust, usually followed
by the installation of Linux or some other Unix-like operating system.
