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serial: sh-sci: Handle GPIO function requests.

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This adds initial support for requesting the various GPIO functions
necessary for certain ports. This just plugs in dumb request/free logic,
but serves as a building block for migrating off of the ->init_pins mess
to a wholly gpiolib backed solution (primarily parts with external
RTS/CTS pins, but will also allow us to clean up RXD pin testing).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2011-12-02 20:09:48 +09:00
parent 73c3d53f38
commit 50f0959ad4
2 changed files with 81 additions and 2 deletions
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12
include/linux/serial_sci.h
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@ -64,6 +64,17 @@ enum {
SCIx_MUX_IRQ = SCIx_NR_IRQS, /* special case */
};
/* Offsets into the sci_port->gpios array */
enum {
SCIx_SCK,
SCIx_RXD,
SCIx_TXD,
SCIx_CTS,
SCIx_RTS,
SCIx_NR_FNS,
};
enum {
SCIx_PROBE_REGTYPE,
@ -123,6 +134,7 @@ struct plat_sci_port_ops {
struct plat_sci_port {
unsigned long mapbase; /* resource base */
unsigned int irqs[SCIx_NR_IRQS]; /* ERI, RXI, TXI, BRI */
unsigned int gpios[SCIx_NR_FNS]; /* SCK, RXD, TXD, CTS, RTS */
unsigned int type; /* SCI / SCIF / IRDA */
upf_t flags; /* UPF_* flags */
unsigned long capabilities; /* Port features/capabilities */