can: ti hecc module : add platform specific initialization callback.

CAN module on AM3517 requires programming of IO expander as part
of init sequence - to enable CAN PHY. Added platform specific
callback to handle phy control(switch on /off).

Signed-off-by: Sriramakrishnan <srk@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 22 insertions, 3 deletions

diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c
index b861cd561074..0c3d2ba0d178 100644
--- a/drivers/net/can/ti_hecc.c
+++ b/drivers/net/can/ti_hecc.c
@@ -28,9 +28,11 @@
  *         .mbx_offset             = 0x2000,
  *         .int_line               = 0,
  *         .revision               = 1,
+ *         .transceiver_switch     = hecc_phy_control,
  * };
  *
- * Please see include/can/platform/ti_hecc.h for description of above fields
+ * Please see include/linux/can/platform/ti_hecc.h for description of
+ * above fields.
  *
  */
 
@@ -220,6 +222,7 @@ struct ti_hecc_priv {
         u32 tx_head;
         u32 tx_tail;
         u32 rx_next;
+        void (*transceiver_switch)(int);
 };
 
 static inline int get_tx_head_mb(struct ti_hecc_priv *priv)
@@ -317,6 +320,13 @@ static int ti_hecc_set_btc(struct ti_hecc_priv *priv)
         return 0;
 }
 
+static void ti_hecc_transceiver_switch(const struct ti_hecc_priv *priv,
+                                        int on)
+{
+        if (priv->transceiver_switch)
+                priv->transceiver_switch(on);
+}
+
 static void ti_hecc_reset(struct net_device *ndev)
 {
         u32 cnt;
@@ -818,10 +828,13 @@ static int ti_hecc_open(struct net_device *ndev)
                 return err;
         }
 
+        ti_hecc_transceiver_switch(priv, 1);
+
         /* Open common can device */
         err = open_candev(ndev);
         if (err) {
                 dev_err(ndev->dev.parent, "open_candev() failed %d\n", err);
+                ti_hecc_transceiver_switch(priv, 0);
                 free_irq(ndev->irq, ndev);
                 return err;
         }
@@ -842,6 +855,7 @@ static int ti_hecc_close(struct net_device *ndev)
         ti_hecc_stop(ndev);
         free_irq(ndev->irq, ndev);
         close_candev(ndev);
+        ti_hecc_transceiver_switch(priv, 0);
 
         return 0;
 }
@@ -903,6 +917,7 @@ static int ti_hecc_probe(struct platform_device *pdev)
         priv->hecc_ram_offset = pdata->hecc_ram_offset;
         priv->mbx_offset = pdata->mbx_offset;
         priv->int_line = pdata->int_line;
+        priv->transceiver_switch = pdata->transceiver_switch;
 
         priv->can.bittiming_const = &ti_hecc_bittiming_const;
         priv->can.do_set_mode = ti_hecc_do_set_mode;
diff --git a/include/linux/can/platform/ti_hecc.h b/include/linux/can/platform/ti_hecc.h
index 4688c7bb1bd1..af17cb3f7a84 100644
--- a/include/linux/can/platform/ti_hecc.h
+++ b/include/linux/can/platform/ti_hecc.h
@@ -1,3 +1,6 @@
+#ifndef __CAN_PLATFORM_TI_HECC_H__
+#define __CAN_PLATFORM_TI_HECC_H__
+
 /*
  * TI HECC (High End CAN Controller) driver platform header
  *
@@ -23,6 +26,7 @@
  * @mbx_offset:         Mailbox RAM offset
  * @int_line:           Interrupt line to use - 0 or 1
  * @version:            version for future use
+ * @transceiver_switch: platform specific callback fn for transceiver control
  *
  * Platform data structure to get all platform specific settings.
  * this structure also accounts the fact that the IP may have different
@@ -35,6 +39,6 @@ struct ti_hecc_platform_data {
         u32 mbx_offset;
         u32 int_line;
         u32 version;
+        void (*transceiver_switch) (int);
 };
-
-
+#endif