mrf24j40: - enable use of external rx/tx components kernel

index 4048062..18cff47 100644
@@ -26,6 +26,10 @@
 #include <net/mac802154.h>
 #include <net/ieee802154.h>
 
+static bool ext_rx_tx = false ;
+module_param(ext_rx_tx, bool, 0);
+MODULE_PARM_DESC(ext_rx_tx, " turn on statemachine to manage external tx/rx");
+
 /* MRF24J40 Short Address Registers */
 #define REG_RXMCR    0x00  /* Receive MAC control */
 #define REG_PANIDL   0x01  /* PAN ID (low) */

@@ -63,6 +67,8 @@
 #define REG_SLPCON1    0x220
 #define REG_WAKETIMEL  0x222  /* Wake-up Time Match Value Low */
 #define REG_WAKETIMEH  0x223  /* Wake-up Time Match Value High */
+#define REG_TESTMODE   0x22f  /* test mode and state machine control register */
+
 #define REG_RX_FIFO    0x300  /* Receive FIFO */
 
 /* Device configuration: Only channels 11-26 on page 0 are supported. */

@@ -669,6 +675,10 @@ static int mrf24j40_probe(struct spi_device *spi)
 	write_short_reg(devrec, REG_RFCTL, 0x0);
 	udelay(192);
 
+	if ( false != ext_rx_tx ){
+	  write_long_reg(devrec, REG_TESTMODE, 0x0f);
+	}
+
 	/* Set RX Mode. RXMCR<1:0>: 0x0 normal, 0x1 promisc, 0x2 error */
 	ret = read_short_reg(devrec, REG_RXMCR, &val);
 	if (ret)