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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2013-05-24 15:42:27 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-05-31 12:32:05 +0200 |
| commit | 95e7982f99c03806b640c2e98e3e8e29ecefa3f1 (patch) | |
| tree | 9549784580f7a6924c276353754162f647d4b255 /drivers/base | |
| parent | 9897dec869bfc54f704fd07dc85800aad2e37250 (diff) | |
| download | barebox-95e7982f99c03806b640c2e98e3e8e29ecefa3f1.tar.gz barebox-95e7982f99c03806b640c2e98e3e8e29ecefa3f1.tar.xz | |
devices: add detect mechanism
We often encounter the situation where slow devices should not be
probed during startup since probing is slow and maybe unnecessary
for unused devices. With MMC we have the 'probe' device parameter,
for ata we have the same, for USB we have the 'usb' command. Overall
this is not very consistent.
With MMC there is the additional problem that the probe parameter
is attached to the logical device when we often have the information
which physical device we want to probe.
This patch adds a 'detect' callback for devices and adds a command
to detect devices and to list the devices which are actually detecable.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/driver.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/base/driver.c b/drivers/base/driver.c index c8856304f5..810d0011f6 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -93,6 +93,13 @@ int device_probe(struct device_d *dev) return 0; } +int device_detect(struct device_d *dev) +{ + if (!dev->detect) + return -ENOSYS; + return dev->detect(dev); +} + static int match(struct driver_d *drv, struct device_d *dev) { int ret; |