ARC: [arcfpga] Early ARC UART to be only activated by cmdline

[firefly-linux-kernel-4.4.55.git] / arch / arc / plat-arcfpga / platform.c

diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c
index f09e771b4bbdbbee4f1fbcb4010a0e6f802da68d..61c7e5997387bc1292cf05b1de81297856aa5865 100644 (file)
--- a/arch/arc/plat-arcfpga/platform.c
+++ b/arch/arc/plat-arcfpga/platform.c
@@ -79,16 +79,11 @@ static void arc_fpga_serial_init(void)
                                   ARRAY_SIZE(fpga_early_devs));
 
        /*
-        * ARC console driver registers itself as an early platform driver
-        * of class "earlyprintk".
-        * Install it here, followed by probe of devices.
-        * The installation here doesn't require earlyprintk in command line
-        * To do so however, replace the lines below with
-        *      parse_early_param();
-        *      early_platform_driver_probe("earlyprintk", 1, 1);
-        *                                                    ^^
+        * ARC console driver registers (build time) as an early platform driver
+        * of class "earlyprintk". However it needs explicit cmdline toggle
+        * "earlyprintk=ttyARC0" to be successfuly runtime registered.
+        * Otherwise the early probe below fails to find the driver
         */
-       early_platform_driver_register_all("earlyprintk");
        early_platform_driver_probe("earlyprintk", 1, 0);
 
        /*