serial: omap: define helpers for pdata function pointers

this patch is in preparation to a few other changes
which will align on the prototype for function
pointers passed through pdata.

It also helps cleaning up the driver a little by
agregating checks for pdata in a single location.

Tested-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 8d7a18ab045ec11733906436422c2f0dcfcbd938..3a60b86ab0f417467281b35143b77edcd0e2117c 100644 (file)
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -102,6 +102,40 @@ static inline void serial_omap_clear_fifos(struct uart_omap_port *up)
        serial_out(up, UART_FCR, 0);
 }
 
+static int serial_omap_get_context_loss_count(struct uart_omap_port *up)
+{
+       struct omap_uart_port_info *pdata = up->pdev->dev.platform_data;
+
+       if (!pdata->get_context_loss_count)
+               return 0;
+
+       return pdata->get_context_loss_count(&up->pdev->dev);
+}
+
+static void serial_omap_set_forceidle(struct uart_omap_port *up)
+{
+       struct omap_uart_port_info *pdata = up->pdev->dev.platform_data;
+
+       if (pdata->set_forceidle)
+               pdata->set_forceidle(up->pdev);
+}
+
+static void serial_omap_set_noidle(struct uart_omap_port *up)
+{
+       struct omap_uart_port_info *pdata = up->pdev->dev.platform_data;
+
+       if (pdata->set_noidle)
+               pdata->set_noidle(up->pdev);
+}
+
+static void serial_omap_enable_wakeup(struct uart_omap_port *up, bool enable)
+{
+       struct omap_uart_port_info *pdata = up->pdev->dev.platform_data;
+
+       if (pdata->enable_wakeup)
+               pdata->enable_wakeup(up->pdev, enable);
+}
+
 /*
  * serial_omap_get_divisor - calculate divisor value
  * @port: uart port info
@@ -178,8 +212,8 @@ static void serial_omap_stop_tx(struct uart_port *port)
                serial_out(up, UART_IER, up->ier);
        }
 
-       if (!up->use_dma && pdata && pdata->set_forceidle)
-               pdata->set_forceidle(up->pdev);
+       if (!up->use_dma && pdata)
+               serial_omap_set_forceidle(up);
 
        pm_runtime_mark_last_busy(&up->pdev->dev);
        pm_runtime_put_autosuspend(&up->pdev->dev);
@@ -309,7 +343,6 @@ static inline void serial_omap_enable_ier_thri(struct uart_omap_port *up)
 static void serial_omap_start_tx(struct uart_port *port)
 {
        struct uart_omap_port *up = to_uart_omap_port(port);
-       struct omap_uart_port_info *pdata = up->pdev->dev.platform_data;
        struct circ_buf *xmit;
        unsigned int start;
        int ret = 0;
@@ -317,8 +350,7 @@ static void serial_omap_start_tx(struct uart_port *port)
        if (!up->use_dma) {
                pm_runtime_get_sync(&up->pdev->dev);
                serial_omap_enable_ier_thri(up);
-               if (pdata && pdata->set_noidle)
-                       pdata->set_noidle(up->pdev);
+               serial_omap_set_noidle(up);
                pm_runtime_mark_last_busy(&up->pdev->dev);
                pm_runtime_put_autosuspend(&up->pdev->dev);
                return;
@@ -1681,28 +1713,26 @@ static int serial_omap_runtime_suspend(struct device *dev)
        if (!up)
                return -EINVAL;
 
-       if (!pdata || !pdata->enable_wakeup)
+       if (!pdata)
                return 0;
 
-       if (pdata->get_context_loss_count)
-               up->context_loss_cnt = pdata->get_context_loss_count(dev);
+       up->context_loss_cnt = serial_omap_get_context_loss_count(up);
 
        if (device_may_wakeup(dev)) {
                if (!up->wakeups_enabled) {
-                       pdata->enable_wakeup(up->pdev, true);
+                       serial_omap_enable_wakeup(up, true);
                        up->wakeups_enabled = true;
                }
        } else {
                if (up->wakeups_enabled) {
-                       pdata->enable_wakeup(up->pdev, false);
+                       serial_omap_enable_wakeup(up, false);
                        up->wakeups_enabled = false;
                }
        }
 
        /* Errata i291 */
-       if (up->use_dma && pdata->set_forceidle &&
-                       (up->errata & UART_ERRATA_i291_DMA_FORCEIDLE))
-               pdata->set_forceidle(up->pdev);
+       if (up->use_dma && (up->errata & UART_ERRATA_i291_DMA_FORCEIDLE))
+               serial_omap_set_forceidle(up);
 
        up->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
        schedule_work(&up->qos_work);
@@ -1716,17 +1746,15 @@ static int serial_omap_runtime_resume(struct device *dev)
        struct omap_uart_port_info *pdata = dev->platform_data;
 
        if (up && pdata) {
-               if (pdata->get_context_loss_count) {
-                       u32 loss_cnt = pdata->get_context_loss_count(dev);
+                       u32 loss_cnt = serial_omap_get_context_loss_count(up);
 
                        if (up->context_loss_cnt != loss_cnt)
                                serial_omap_restore_context(up);
-               }
 
                /* Errata i291 */
-               if (up->use_dma && pdata->set_noidle &&
-                               (up->errata & UART_ERRATA_i291_DMA_FORCEIDLE))
-                       pdata->set_noidle(up->pdev);
+               if ((up->errata & UART_ERRATA_i291_DMA_FORCEIDLE) &&
+                               up->use_dma)
+                       serial_omap_set_noidle(up);
 
                up->latency = up->calc_latency;
                schedule_work(&up->qos_work);