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superio/smscsuperio: Fix chip detection 

There was dereference of NULL dev->ops in pnp_enter/exit_conf_mode()
as those calls were made before pnp_enable_devices() was run.
Since hardware did not enter configuration mode, detection failed with
ID and REV read as 0xff.

Change-Id: If13086707cd86e392890ccf4f717e13a87f3317f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5949
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Kyösti Mälkki 2014-06-06 21:46:47 +03:00
parent afc8d98769
commit 33eaf3a715
1 changed files with 5 additions and 2 deletions
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7
src/superio/smsc/smscsuperio/superio.c
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@ -231,11 +231,12 @@ static void enable_dev(device_t dev)
u8 test7;
if (first_time) {
pnp_enter_conf_mode_55(dev);
/* Read the device ID and revision of the Super I/O chip. */
pnp_enter_conf_mode(dev);
superio_id = pnp_read_config(dev, DEVICE_ID_REG);
superio_rev = pnp_read_config(dev, DEVICE_REV_REG);
pnp_exit_conf_mode(dev);
/* TODO: Error handling? */
@ -257,6 +258,8 @@ static void enable_dev(device_t dev)
test7 |= (1 << 0);
pnp_write_config(dev, DEVICE_TEST7_REG, test7);
}
pnp_exit_conf_mode_aa(dev);
}
/* Find the correct Super I/O. */