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authorMark M. Hoffman <mhoffman@lightlink.com>2006-03-23 10:50:25 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2006-04-14 14:18:34 -0400
commite97b81ddbb8b8c72b85330ac4a454a4513dcba8a (patch)
treeb7be59895ee5cafdd5af5b4237f5b96b2812b180 /Documentation/i2c/busses/i2c-parport
parent3cb8e1a92ef7588d3acdecf493ddddd0dd71a709 (diff)
[PATCH] i2c-parport: Make type parameter mandatory
This patch forces the user to specify what type of adapter is present when loading i2c-parport or i2c-parport-light. If none is specified, the driver init simply fails - instead of assuming adapter type 0. This alleviates the sometimes lengthy boot time delays which can be caused by accidentally building one of these into a kernel along with several i2c slave drivers that have lengthy probe routines (e.g. hwmon drivers). Kconfig and documentation updated accordingly. Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com> Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/i2c/busses/i2c-parport')
-rw-r--r--Documentation/i2c/busses/i2c-parport16
1 files changed, 10 insertions, 6 deletions
diff --git a/Documentation/i2c/busses/i2c-parport b/Documentation/i2c/busses/i2c-parport
index d9f23c0763f1..77b995dfca22 100644
--- a/Documentation/i2c/busses/i2c-parport
+++ b/Documentation/i2c/busses/i2c-parport
@@ -12,18 +12,22 @@ meant as a replacement for the older, individual drivers:
12 teletext adapters) 12 teletext adapters)
13 13
14It currently supports the following devices: 14It currently supports the following devices:
15 * Philips adapter 15 * (type=0) Philips adapter
16 * home brew teletext adapter 16 * (type=1) home brew teletext adapter
17 * Velleman K8000 adapter 17 * (type=2) Velleman K8000 adapter
18 * ELV adapter 18 * (type=3) ELV adapter
19 * Analog Devices evaluation boards (ADM1025, ADM1030, ADM1031, ADM1032) 19 * (type=4) Analog Devices ADM1032 evaluation board
20 * Barco LPT->DVI (K5800236) adapter 20 * (type=5) Analog Devices evaluation boards: ADM1025, ADM1030, ADM1031
21 * (type=6) Barco LPT->DVI (K5800236) adapter
21 22
22These devices use different pinout configurations, so you have to tell 23These devices use different pinout configurations, so you have to tell
23the driver what you have, using the type module parameter. There is no 24the driver what you have, using the type module parameter. There is no
24way to autodetect the devices. Support for different pinout configurations 25way to autodetect the devices. Support for different pinout configurations
25can be easily added when needed. 26can be easily added when needed.
26 27
28Earlier kernels defaulted to type=0 (Philips). But now, if the type
29parameter is missing, the driver will simply fail to initialize.
30
27 31
28Building your own adapter 32Building your own adapter
29------------------------- 33-------------------------