MLK-10546-2 imx: mx7 implement reset_misc

On mx7d 12x12 lpddr3 arm2 board, POR_B reset in uboot will fail stress
reset test, and hangs in rom code. Rom log buffer show thats wrong
hab_image_entry and runs into serial download mode. Also there is no
time delay reset circuit for this board.

We found when disable CONFIG_VIDEO, all seems fine. Actually,
only the following piece of code can make stress reset ok,
"
  writel(LCDIF_CTRL1_VSYNC_EDGE_IRQ, &regs->hw_lcdif_ctrl1_clr);
  while (--timeout) {
	  if (readl(&regs->hw_lcdif_ctrl1) & LCDIF_CTRL1_VSYNC_EDGE_IRQ)
		  break;
	  udelay(1);
  }
"
Here we use lcdif_power_down API which is better to shutdown lcdif same as
the way used in arch_preboot_os.

Implement reset_misc for mx7, since it does not hurt for others boards.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>

0 files changed, 0 insertions, 0 deletions