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authorAndres Salomon <dilinger@queued.net>2012-07-11 17:40:25 -0700
committerAndres Salomon <dilinger@queued.net>2012-07-31 23:27:30 -0400
commit3d26c20bae9e97c98f7240184427d3a38515d406 (patch)
tree987a82438ffe61b675cf08d33b3e11154b605f58 /include
parent3bf9428f220911795edde453a95f9509945004e5 (diff)
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.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/olpc-ec.h b/include/linux/olpc-ec.h
index 6d4e426d9fd..231e96f5dfe 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);