ARM: OMAP2+: UART: Do not gate uart clocks if used for debug_prints

[firefly-linux-kernel-4.4.55.git] / arch / arm / mach-omap2 / serial.c

diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index 6c8135a9d35d2c768f989a2754d928bd4f054ecf..c909770eacd12ae2db2dbe08cc7e960a8b34f7e4 100644 (file)
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -65,6 +65,7 @@ static LIST_HEAD(uart_list);
 static u8 num_uarts;
 static u8 console_uart_id = -1;
 static u8 no_console_suspend;
+static u8 uart_debug;
 
 #define DEFAULT_RXDMA_POLLRATE         1       /* RX DMA polling rate (us) */
 #define DEFAULT_RXDMA_BUFSIZE          4096    /* RX DMA buffer size */
@@ -300,6 +301,13 @@ static int __init omap_serial_early_init(void)
                if (cmdline_find_option(uart_name)) {
                        console_uart_id = uart->num;
 
+                       if (console_loglevel >= 10) {
+                               uart_debug = true;
+                               pr_info("%s used as console in debug mode"
+                                               " uart%d clocks will not be"
+                                               " gated", uart_name, uart->num);
+                       }
+
                        if (cmdline_find_option("no_console_suspend"))
                                no_console_suspend = true;
 
@@ -399,7 +407,8 @@ void __init omap_serial_init_port(struct omap_board_data *bdata,
 
        oh->dev_attr = uart;
 
-       if ((cpu_is_omap34xx() || cpu_is_omap44xx()) && bdata->pads)
+       if (((cpu_is_omap34xx() || cpu_is_omap44xx()) && bdata->pads)
+                       && !uart_debug)
                device_init_wakeup(&pdev->dev, true);
 }