u-boot-init-rts.patch

   1 Index: cpu/bf548/init_sdram.S
   2 ===================================================================
   3 --- cpu/bf548/init_sdram.S      (revision 817)
   4 +++ cpu/bf548/init_sdram.S      (working copy)
   5 @@ -38,6 +38,15 @@ init_sdram:
   6         [--SP] = (R7:0);
   7         [--SP] = (P5:0);
   8
   9 +#if (BFIN_BOOT_MODE == BFIN_UART_BOOT)
  10 +       /* force RTS rather than relying on auto RTS */
  11 +       P3.h = hi(UART1_MCR)
  12 +       P3.l = lo(UART1_MCR)
  13 +       R0 = w[P3];
  14 +       bitset(R0, 5);
  15 +       w[p3] = R0;
  16 +#endif
  17 +
  18         /*************************************************
  19         * System interrupt wakeup registers (SIC_IWRx)   *
  20         * Required for PLL_CTL and VR_CTL configuration  *
  21 @@ -239,8 +248,17 @@ test_failed:
  22         r0.l = 0x0080; /* Test failed, light on LED2 */
  23         w[p0]= r0;
  24         ssync
  25 -
  26  ddr_init_end:
  27 +
  28 +#if (BFIN_BOOT_MODE == BFIN_UART_BOOT)
  29 +       /* clear forced RTS rather than relying on auto RTS */
  30 +       P3.h = hi(UART1_MCR)
  31 +       P3.l = lo(UART1_MCR)
  32 +       R0 = w[P3];
  33 +       bitclr(R0, 5);
  34 +       w[p3] = R0;
  35 +#endif
  36 +
  37         (P5:0) = [SP++];
  38         (R7:0) = [SP++];
  39         RETS   = [SP++];