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linux-sg2042
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viafb: reduce I2C timeout and delay 

This patch reduces the value for I2C timeout and udelay.
The udelay was reduced to 10 (old: 40) which is still very high as for
standard-mode I2C even 5 should work. This gives a speedup of factor 4
when talking to I2C devices.
The timeout was reduced to 2 (old: 20) which is taken from the radeon
driver so it should work as well. This gives a speedup of factor 10 when
detecting that there is no I2C device we want to talk to.
This causes a huge improvement of device initialization time.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Cc: Joseph Chan <JosephChan@via.com.tw>
This commit is contained in:
Florian Tobias Schandinat 2010-09-17 02:10:33 +00:00
parent ee40b7d1c0
commit e029ab0d02
1 changed files with 2 additions and 2 deletions
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4
drivers/video/via/via_i2c.c
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@ -202,8 +202,8 @@ static int create_i2c_bus(struct i2c_adapter *adapter,
algo->setscl = via_i2c_setscl;
algo->getsda = via_i2c_getsda;
algo->getscl = via_i2c_getscl;
algo->udelay = 40;
algo->timeout = 20;
algo->udelay = 10;
algo->timeout = 2;
algo->data = adap_cfg;
sprintf(adapter->name, "viafb i2c io_port idx 0x%02x",