5 files changed, 60 insertions, 22 deletions

diff --git a/arch/arm/mach-omap2/board-n8x0.c b/arch/arm/mach-omap2/board-n8x0.c
index bebd3d84365e..118f38c4b37d 100644
--- a/arch/arm/mach-omap2/board-n8x0.c
+++ b/arch/arm/mach-omap2/board-n8x0.c
@@ -644,15 +644,15 @@ static inline void board_serial_init(void)
         bdata.pads_cnt = 0;
 
         bdata.id = 0;
-        omap_serial_init_port(&bdata);
+        omap_serial_init_port(&bdata, NULL);
 
         bdata.id = 1;
-        omap_serial_init_port(&bdata);
+        omap_serial_init_port(&bdata, NULL);
 
         bdata.id = 2;
         bdata.pads = serial2_pads;
         bdata.pads_cnt = ARRAY_SIZE(serial2_pads);
-        omap_serial_init_port(&bdata);
+        omap_serial_init_port(&bdata, NULL);
 }
 
 #else
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index f94394fe5b16..5b1b36a45e9c 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -43,12 +43,12 @@
 #include "mux.h"
 
 /*
- * NOTE: By default the serial timeout is disabled as it causes lost characters
- * over the serial ports. This means that the UART clocks will stay on until
- * disabled via sysfs. This also causes that any deeper omap sleep states are
- * blocked. 
+ * NOTE: By default the serial auto_suspend timeout is disabled as it causes
+ * lost characters over the serial ports. This means that the UART clocks will
+ * stay on until power/autosuspend_delay is set for the uart from sysfs.
+ * This also causes that any deeper omap sleep states are blocked.
  */
-#define DEFAULT_TIMEOUT 0
+#define DEFAULT_AUTOSUSPEND_DELAY       -1
 
 #define MAX_UART_HWMOD_NAME_LEN         16
 
@@ -64,6 +64,18 @@ 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_BUFSIZE           4096    /* RX DMA buffer size */
+
+static struct omap_uart_port_info omap_serial_default_info[] __initdata = {
+        {
+                .dma_enabled    = false,
+                .dma_rx_buf_size = DEFAULT_RXDMA_BUFSIZE,
+                .dma_rx_timeout = DEFAULT_RXDMA_TIMEOUT,
+                .autosuspend_timeout = DEFAULT_AUTOSUSPEND_DELAY,
+        },
+};
+
 #ifdef CONFIG_PM
 
 int omap_uart_can_sleep(void)
@@ -294,6 +306,7 @@ core_initcall(omap_serial_early_init);
 /**
  * omap_serial_init_port() - initialize single serial port
  * @bdata: port specific board data pointer
+ * @info: platform specific data pointer
  *
  * This function initialies serial driver for given port only.
  * Platforms can call this function instead of omap_serial_init()
@@ -302,7 +315,8 @@ core_initcall(omap_serial_early_init);
  * Don't mix calls to omap_serial_init_port() and omap_serial_init(),
  * use only one of the two.
  */
-void __init omap_serial_init_port(struct omap_board_data *bdata)
+void __init omap_serial_init_port(struct omap_board_data *bdata,
+                        struct omap_uart_port_info *info)
 {
         struct omap_uart_state *uart;
         struct omap_hwmod *oh;
@@ -322,17 +336,22 @@ void __init omap_serial_init_port(struct omap_board_data *bdata)
         list_for_each_entry(uart, &uart_list, node)
                 if (bdata->id == uart->num)
                         break;
+        if (!info)
+                info = omap_serial_default_info;
 
         oh = uart->oh;
         name = DRIVER_NAME;
 
-        omap_up.dma_enabled = uart->dma_enabled;
+        omap_up.dma_enabled = info->dma_enabled;
         omap_up.uartclk = OMAP24XX_BASE_BAUD * 16;
         omap_up.flags = UPF_BOOT_AUTOCONF;
         omap_up.get_context_loss_count = omap_pm_get_dev_context_loss_count;
         omap_up.set_forceidle = omap_uart_set_forceidle;
         omap_up.set_noidle = omap_uart_set_noidle;
         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.autosuspend_timeout = info->autosuspend_timeout;
 
         /* Enable the MDR1 Errata i202 for OMAP2430/3xxx/44xx */
         if (!cpu_is_omap2420() && !cpu_is_ti816x())
@@ -379,13 +398,14 @@ void __init omap_serial_init_port(struct omap_board_data *bdata)
 }
 
 /**
- * omap_serial_init() - initialize all supported serial ports
+ * omap_serial_board_init() - initialize all supported serial ports
+ * @info: platform specific data pointer
  *
  * Initializes all available UARTs as serial ports. Platforms
  * can call this function when they want to have default behaviour
  * for serial ports (e.g initialize them all as serial ports).
  */
-void __init omap_serial_init(void)
+void __init omap_serial_board_init(struct omap_uart_port_info *info)
 {
         struct omap_uart_state *uart;
         struct omap_board_data bdata;
@@ -399,7 +419,21 @@ void __init omap_serial_init(void)
                 if (cpu_is_omap44xx() || cpu_is_omap34xx())
                         omap_serial_fill_default_pads(&bdata);
 
-                omap_serial_init_port(&bdata);
-
+                if (!info)
+                        omap_serial_init_port(&bdata, NULL);
+                else
+                        omap_serial_init_port(&bdata, &info[uart->num]);
         }
 }
+
+/**
+ * omap_serial_init() - initialize all supported serial ports
+ *
+ * Initializes all available UARTs.
+ * Platforms can call this function when they want to have default behaviour
+ * for serial ports (e.g initialize them all as serial ports).
+ */
+void __init omap_serial_init(void)
+{
+        omap_serial_board_init(NULL);
+}
diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h
index 39709ecfd58f..a740a6c0e104 100644
--- a/arch/arm/plat-omap/include/plat/omap-serial.h
+++ b/arch/arm/plat-omap/include/plat/omap-serial.h
@@ -66,6 +66,9 @@ struct omap_uart_port_info {
         unsigned int            uartclk;        /* UART clock rate */
         upf_t                   flags;          /* UPF_* flags */
         u32                     errata;
+        unsigned int            dma_rx_buf_size;
+        unsigned int            dma_rx_timeout;
+        unsigned int            autosuspend_timeout;
 
         int (*get_context_loss_count)(struct device *);
         void (*set_forceidle)(struct platform_device *);
@@ -94,8 +97,8 @@ struct uart_omap_dma {
         spinlock_t              rx_lock;
         /* timer to poll activity on rx dma */
         struct timer_list       rx_timer;
-        int                     rx_buf_size;
-        int                     rx_timeout;
+        unsigned int            rx_buf_size;
+        unsigned int            rx_timeout;
 };
 
 struct uart_omap_port {
diff --git a/arch/arm/plat-omap/include/plat/serial.h b/arch/arm/plat-omap/include/plat/serial.h
index 152500b558a2..38b3e38df2a0 100644
--- a/arch/arm/plat-omap/include/plat/serial.h
+++ b/arch/arm/plat-omap/include/plat/serial.h
@@ -106,10 +106,13 @@
 #ifndef __ASSEMBLER__
 
 struct omap_board_data;
+struct omap_uart_port_info;
 
 extern void omap_serial_init(void);
-extern void omap_serial_init_port(struct omap_board_data *bdata);
 extern int omap_uart_can_sleep(void);
+extern void omap_serial_board_init(struct omap_uart_port_info *platform_data);
+extern void omap_serial_init_port(struct omap_board_data *bdata,
+                struct omap_uart_port_info *platform_data);
 #endif
 
 #endif
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 45a25a01c44d..d60e001cf60f 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -43,8 +43,6 @@
 #include <plat/dmtimer.h>
 #include <plat/omap-serial.h>
 
-#define OMAP_UART_AUTOSUSPEND_DELAY -1
-
 static struct uart_omap_port *ui[OMAP_MAX_HSUART_PORTS];
 
 /* Forward declaration of functions */
@@ -1376,8 +1374,8 @@ static int serial_omap_probe(struct platform_device *pdev)
                 up->uart_dma.uart_dma_tx = dma_tx->start;
                 up->uart_dma.uart_dma_rx = dma_rx->start;
                 up->use_dma = 1;
-                up->uart_dma.rx_buf_size = 4096;
-                up->uart_dma.rx_timeout = 2;
+                up->uart_dma.rx_buf_size = omap_up_info->dma_rx_buf_size;
+                up->uart_dma.rx_timeout = omap_up_info->dma_rx_timeout;
                 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;
@@ -1386,7 +1384,7 @@ static int serial_omap_probe(struct platform_device *pdev)
 
         pm_runtime_use_autosuspend(&pdev->dev);
         pm_runtime_set_autosuspend_delay(&pdev->dev,
-                        OMAP_UART_AUTOSUSPEND_DELAY);
+                        omap_up_info->autosuspend_timeout);
 
         pm_runtime_irq_safe(&pdev->dev);
         pm_runtime_enable(&pdev->dev);