OMAP/serial: Add support for driving a GPIO as DTR.

OMAP hardware doesn't provide a phyisical DTR line, but
some configurations may need a DTR line which tracks whether
the device is open or not.

So allow a gpio to be configured as the DTR line.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h
index 1a52725ffcf2..52d3de45745f 100644
--- a/arch/arm/plat-omap/include/plat/omap-serial.h
+++ b/arch/arm/plat-omap/include/plat/omap-serial.h
@@ -69,6 +69,9 @@ struct omap_uart_port_info {
         unsigned int            dma_rx_timeout;
         unsigned int            autosuspend_timeout;
         unsigned int            dma_rx_poll_rate;
+        int                     DTR_gpio;
+        int                     DTR_inverted;
+        int                     DTR_present;
 
         int (*get_context_loss_count)(struct device *);
         void (*set_forceidle)(struct platform_device *);
@@ -131,6 +134,10 @@ struct uart_omap_port {
         u32                     errata;
         u8                      wakeups_enabled;
 
+        int                     DTR_gpio;
+        int                     DTR_inverted;
+        int                     DTR_active;
+
         struct pm_qos_request   pm_qos_request;
         u32                     latency;
         u32                     calc_latency;