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| author | David Daney <ddaney@caviumnetworks.com> | 2010-11-16 14:42:14 -0800 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2010-12-24 01:28:54 -0700 |
| commit | 020862648445d7c1b12ea213c152f27def703f3b (patch) | |
| tree | 4306b2eb5c46cd8f43d0be2cf9918a38b217450e /drivers/of/of_i2c.c | |
| parent | 5e2f55c6aaf4865081c46bf53664c8b5da8dc49e (diff) | |
| download | lwn-020862648445d7c1b12ea213c152f27def703f3b.tar.gz lwn-020862648445d7c1b12ea213c152f27def703f3b.zip | |
of/i2c: Fix request module by alias
If we are registering an i2c device that has a device tree node like
this real-world example:
rtc@68 {
compatible = "dallas,ds1337";
reg = <0x68>;
};
of_i2c_register_devices() will try to load a module called ds1337.ko.
There is no such module, so it will fail. If we look in modules.alias
we will find entries like these:
.
.
.
alias i2c:ds1339 rtc_ds1307
alias i2c:ds1338 rtc_ds1307
alias i2c:ds1337 rtc_ds1307
alias i2c:ds1307 rtc_ds1307
alias i2c:ds1374 rtc_ds1374
.
.
.
The module we want is really called rtc_ds1307.ko. If we request a
module called "i2c:ds1337", the userspace module loader will do the
right thing (unless it is busybox) and load rtc_ds1307.ko. So we add
the I2C_MODULE_PREFIX to the request_module() string.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/of/of_i2c.c')
| -rw-r--r-- | drivers/of/of_i2c.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c index c85d3c7421fc..f37fbeb66a44 100644 --- a/drivers/of/of_i2c.c +++ b/drivers/of/of_i2c.c @@ -61,7 +61,7 @@ void of_i2c_register_devices(struct i2c_adapter *adap) info.of_node = of_node_get(node); info.archdata = &dev_ad; - request_module("%s", info.type); + request_module("%s%s", I2C_MODULE_PREFIX, info.type); result = i2c_new_device(adap, &info); if (result == NULL) { |