Looking at the existing serial drivers (esp. the 8250 derived
variants) we see a common trend. They create a hardware specific
port struct, which in turn contains a generic serial_port struct.
The other trend, is that they all create some sort of shortcut
to go through the hardware specific struct, to the serial_port
struct, which has the basic in/out operations within. Looking
for the serial_in and serial_out in several drivers shows this.
Rather than let this continue, lets create a generic set of
similar helper wrappers that can be used on a struct port, so
we can eliminate bouncing out through hardware specific struct
pointers just to come back into struct port where possible.
Signed-off-by: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
---
include/linux/serial_core.h | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index c91ace7..72e0360 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -381,6 +381,16 @@ struct uart_port {
void *private_data; /* generic platform data pointer */
};
+static inline int serial_port_in(struct uart_port *up, int offset)
+{
+ return up->serial_in(up, offset);
+}
+
+static inline void serial_port_out(struct uart_port *up, int offset, int value)
+{
+ up->serial_out(up, offset, value);
+}
+
/*
* This is the state information which is persistent across opens.
*/
--
1.7.9.1
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