3 files changed, 14 insertions, 9 deletions

diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index 5b1b36a45e9c..5dd928945033 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -64,13 +64,15 @@ struct omap_uart_state {
 static LIST_HEAD(uart_list);
 static u8 num_uarts;
 
-#define DEFAULT_RXDMA_TIMEOUT           1       /* RX DMA polling rate (us) */
+#define DEFAULT_RXDMA_POLLRATE          1       /* RX DMA polling rate (us) */
 #define DEFAULT_RXDMA_BUFSIZE           4096    /* RX DMA buffer size */
+#define DEFAULT_RXDMA_TIMEOUT           (3 * HZ)/* RX DMA timeout (jiffies) */
 
 static struct omap_uart_port_info omap_serial_default_info[] __initdata = {
         {
                 .dma_enabled    = false,
                 .dma_rx_buf_size = DEFAULT_RXDMA_BUFSIZE,
+                .dma_rx_poll_rate = DEFAULT_RXDMA_POLLRATE,
                 .dma_rx_timeout = DEFAULT_RXDMA_TIMEOUT,
                 .autosuspend_timeout = DEFAULT_AUTOSUSPEND_DELAY,
         },
@@ -351,6 +353,7 @@ void __init omap_serial_init_port(struct omap_board_data *bdata,
         omap_up.enable_wakeup = omap_uart_enable_wakeup;
         omap_up.dma_rx_buf_size = info->dma_rx_buf_size;
         omap_up.dma_rx_timeout = info->dma_rx_timeout;
+        omap_up.dma_rx_poll_rate = info->dma_rx_poll_rate;
         omap_up.autosuspend_timeout = info->autosuspend_timeout;
 
         /* Enable the MDR1 Errata i202 for OMAP2430/3xxx/44xx */
diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h
index a740a6c0e104..ea63b2bc761c 100644
--- a/arch/arm/plat-omap/include/plat/omap-serial.h
+++ b/arch/arm/plat-omap/include/plat/omap-serial.h
@@ -53,7 +53,6 @@
 
 #define OMAP_UART_DMA_CH_FREE   -1
 
-#define RX_TIMEOUT              (3 * HZ)
 #define OMAP_MAX_HSUART_PORTS   4
 
 #define MSR_SAVE_FLAGS          UART_MSR_ANY_DELTA
@@ -69,6 +68,7 @@ struct omap_uart_port_info {
         unsigned int            dma_rx_buf_size;
         unsigned int            dma_rx_timeout;
         unsigned int            autosuspend_timeout;
+        unsigned int            dma_rx_poll_rate;
 
         int (*get_context_loss_count)(struct device *);
         void (*set_forceidle)(struct platform_device *);
@@ -98,6 +98,7 @@ struct uart_omap_dma {
         /* timer to poll activity on rx dma */
         struct timer_list       rx_timer;
         unsigned int            rx_buf_size;
+        unsigned int            rx_poll_rate;
         unsigned int            rx_timeout;
 };
 
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index d60e001cf60f..e1eaa66c047b 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -47,7 +47,7 @@ static struct uart_omap_port *ui[OMAP_MAX_HSUART_PORTS];
 
 /* Forward declaration of functions */
 static void uart_tx_dma_callback(int lch, u16 ch_status, void *data);
-static void serial_omap_rx_timeout(unsigned long uart_no);
+static void serial_omap_rxdma_poll(unsigned long uart_no);
 static int serial_omap_start_rxdma(struct uart_omap_port *up);
 static void serial_omap_mdr1_errataset(struct uart_omap_port *up, u8 mdr1);
 
@@ -542,7 +542,7 @@ static int serial_omap_startup(struct uart_port *port)
                         (dma_addr_t *)&(up->uart_dma.tx_buf_dma_phys),
                         0);
                 init_timer(&(up->uart_dma.rx_timer));
-                up->uart_dma.rx_timer.function = serial_omap_rx_timeout;
+                up->uart_dma.rx_timer.function = serial_omap_rxdma_poll;
                 up->uart_dma.rx_timer.data = up->pdev->id;
                 /* Currently the buffer size is 4KB. Can increase it */
                 up->uart_dma.rx_buf = dma_alloc_coherent(NULL,
@@ -1160,7 +1160,7 @@ static int serial_omap_resume(struct device *dev)
 }
 #endif
 
-static void serial_omap_rx_timeout(unsigned long uart_no)
+static void serial_omap_rxdma_poll(unsigned long uart_no)
 {
         struct uart_omap_port *up = ui[uart_no];
         unsigned int curr_dma_pos, curr_transmitted_size;
@@ -1170,9 +1170,9 @@ static void serial_omap_rx_timeout(unsigned long uart_no)
         if ((curr_dma_pos == up->uart_dma.prev_rx_dma_pos) ||
                              (curr_dma_pos == 0)) {
                 if (jiffies_to_msecs(jiffies - up->port_activity) <
-                                                        RX_TIMEOUT) {
+                                                up->uart_dma.rx_timeout) {
                         mod_timer(&up->uart_dma.rx_timer, jiffies +
-                                usecs_to_jiffies(up->uart_dma.rx_timeout));
+                                usecs_to_jiffies(up->uart_dma.rx_poll_rate));
                 } else {
                         serial_omap_stop_rxdma(up);
                         up->ier |= (UART_IER_RDI | UART_IER_RLSI);
@@ -1201,7 +1201,7 @@ static void serial_omap_rx_timeout(unsigned long uart_no)
                 }
         } else  {
                 mod_timer(&up->uart_dma.rx_timer, jiffies +
-                        usecs_to_jiffies(up->uart_dma.rx_timeout));
+                        usecs_to_jiffies(up->uart_dma.rx_poll_rate));
         }
         up->port_activity = jiffies;
 }
@@ -1240,7 +1240,7 @@ static int serial_omap_start_rxdma(struct uart_omap_port *up)
         /* FIXME: Cache maintenance needed here? */
         omap_start_dma(up->uart_dma.rx_dma_channel);
         mod_timer(&up->uart_dma.rx_timer, jiffies +
-                                usecs_to_jiffies(up->uart_dma.rx_timeout));
+                                usecs_to_jiffies(up->uart_dma.rx_poll_rate));
         up->uart_dma.rx_dma_used = true;
         return ret;
 }
@@ -1376,6 +1376,7 @@ static int serial_omap_probe(struct platform_device *pdev)
                 up->use_dma = 1;
                 up->uart_dma.rx_buf_size = omap_up_info->dma_rx_buf_size;
                 up->uart_dma.rx_timeout = omap_up_info->dma_rx_timeout;
+                up->uart_dma.rx_poll_rate = omap_up_info->dma_rx_poll_rate;
                 spin_lock_init(&(up->uart_dma.tx_lock));
                 spin_lock_init(&(up->uart_dma.rx_lock));
                 up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE;