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| author | Andres Salomon <dilinger@queued.net> | 2012-07-12 02:40:25 +0200 |
|---|---|---|
| committer | Andres Salomon <dilinger@queued.net> | 2012-08-01 05:27:30 +0200 |
| commit | 3d26c20bae9e97c98f7240184427d3a38515d406 (patch) | |
| tree | 987a82438ffe61b675cf08d33b3e11154b605f58 /include | |
| parent | drivers: OLPC: update various drivers to include olpc-ec.h (diff) | |
| download | linux-3d26c20bae9e97c98f7240184427d3a38515d406.tar.xz linux-3d26c20bae9e97c98f7240184427d3a38515d406.zip | |
Platform: OLPC: allow EC cmd to be overridden, and create a workqueue to call it
This provides a new API allows different OLPC architectures to override the
EC driver. x86 and ARM OLPC machines use completely different EC backends.
The olpc_ec_cmd is synchronous, and waits for the workqueue to send the
command to the EC. Multiple callers can run olpc_ec_cmd() at once, and
they will by serialized and sleep while only one executes on the EC at a time.
We don't provide an unregister function, as that doesn't make sense within
the context of OLPC machines - there's only ever 1 EC, it's critical to
functionality, and it certainly not hotpluggable.
Signed-off-by: Andres Salomon <dilinger@queued.net>
Acked-by: Paul Fox <pgf@laptop.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/olpc-ec.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/olpc-ec.h b/include/linux/olpc-ec.h index 6d4e426d9fdc..231e96f5dfe2 100644 --- a/include/linux/olpc-ec.h +++ b/include/linux/olpc-ec.h @@ -14,8 +14,14 @@ #define EC_SCI_QUERY 0x84 #define EC_EXT_SCI_QUERY 0x85 +struct olpc_ec_driver { + int (*ec_cmd)(u8, u8 *, size_t, u8 *, size_t, void *); +}; + #ifdef CONFIG_OLPC +extern void olpc_ec_driver_register(struct olpc_ec_driver *drv, void *arg); + extern int olpc_ec_cmd(u8 cmd, u8 *inbuf, size_t inlen, u8 *outbuf, size_t outlen); |