From 35ddf7c003f54fc9878a15384beb9a900d40319d Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Mon, 2 Aug 2010 14:21:39 +0300 Subject: [PATCH] omap: Add back UART MDR1 check into uncompress.h Recent DEBUG_LL and uncompress.h changes removed the check_port() as pointed out by Cory Maccarrone . This causes some boards to not boot, so add back the MDR1 register check. The MDR1 register tells the mode of omap uart. Based on an earlier patch by Cory Maccarrone . Tested-by: Cory Maccarrone Signed-off-by: Tony Lindgren --- arch/arm/plat-omap/include/plat/uncompress.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/plat-omap/include/plat/uncompress.h b/arch/arm/plat-omap/include/plat/uncompress.h index bbedd71943f6..ddf723be48dc 100644 --- a/arch/arm/plat-omap/include/plat/uncompress.h +++ b/arch/arm/plat-omap/include/plat/uncompress.h @@ -25,6 +25,8 @@ #include +#define MDR1_MODE_MASK 0x07 + static volatile u8 *uart_base; static int uart_shift; @@ -42,6 +44,10 @@ static void putc(int c) if (!uart_base) return; + /* Check for UART 16x mode */ + if ((uart_base[UART_OMAP_MDR1 << uart_shift] & MDR1_MODE_MASK) != 0) + return; + while (!(uart_base[UART_LSR << uart_shift] & UART_LSR_THRE)) barrier(); uart_base[UART_TX << uart_shift] = c;