Merge tag 'devicetree-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux into next

Pull DeviceTree updates from Rob Herring:
 - Another round of clean-up of FDT related code in architecture code.
   This removes knowledge of internal FDT details from most
   architectures except powerpc.
 - Conversion of kernel's custom FDT parsing code to use libfdt.
 - DT based initialization for generic serial earlycon.  The
   introduction of generic serial earlycon support went in through the
   tty tree.
 - Improve the platform device naming for DT probed devices to ensure
   unique naming and use parent names instead of a global index.
 - Fix a race condition in of_update_property.
 - Unify the various linker section OF match tables and fix several
   function prototype errors.
 - Update platform_get_irq_byname to work in deferred probe cases.
 - 2 binding doc updates

* tag 'devicetree-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (58 commits)
  of: handle NULL node in next_child iterators
  of/irq: provide more wrappers for !CONFIG_OF
  devicetree: bindings: Document micrel vendor prefix
  dt: bindings: dwc2: fix required value for the phy-names property
  of_pci_irq: kill useless variable in of_irq_parse_pci()
  of/irq: do irq resolution in platform_get_irq_byname()
  of: Add a testcase for of_find_node_by_path()
  of: Make of_find_node_by_path() handle /aliases
  of: Create unlocked version of for_each_child_of_node()
  lib: add glibc style strchrnul() variant
  of: Handle memory@0 node on PPC32 only
  pci/of: Remove dead code
  of: fix race between search and remove in of_update_property()
  of: Use NULL for pointers
  of: Stop naming platform_device using dcr address
  of: Ensure unique names without sacrificing determinism
  tty/serial: pl011: add DT based earlycon support
  of/fdt: add FDT serial scanning for earlycon
  of/fdt: add FDT address translation support
  serial: earlycon: add DT support
  ...

2 files changed, 29 insertions, 0 deletions

diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index ee3d80346780..908a6e3142a2 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -2072,6 +2072,7 @@ static int __init pl011_early_console_setup(struct earlycon_device *device,
         return 0;
 }
 EARLYCON_DECLARE(pl011, pl011_early_console_setup);
+OF_EARLYCON_DECLARE(pl011, "arm,pl011", pl011_early_console_setup);
 
 #else
 #define AMBA_CONSOLE    NULL
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index c92e83088adb..5131b5ee6164 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -15,6 +15,8 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/serial_core.h>
+#include <linux/sizes.h>
+#include <linux/mod_devicetable.h>
 
 #ifdef CONFIG_FIX_EARLYCON_MEM
 #include <asm/fixmap.h>
@@ -32,6 +34,9 @@ static struct earlycon_device early_console_dev = {
         .con = &early_con,
 };
 
+static const struct of_device_id __earlycon_of_table_sentinel
+        __used __section(__earlycon_of_table_end);
+
 static void __iomem * __init earlycon_map(unsigned long paddr, size_t size)
 {
         void __iomem *base;
@@ -142,3 +147,26 @@ int __init setup_earlycon(char *buf, const char *match,
         register_console(early_console_dev.con);
         return 0;
 }
+
+int __init of_setup_earlycon(unsigned long addr,
+                             int (*setup)(struct earlycon_device *, const char *))
+{
+        int err;
+        struct uart_port *port = &early_console_dev.port;
+
+        port->iotype = UPIO_MEM;
+        port->mapbase = addr;
+        port->uartclk = BASE_BAUD * 16;
+        port->membase = earlycon_map(addr, SZ_4K);
+
+        early_console_dev.con->data = &early_console_dev;
+        err = setup(&early_console_dev, NULL);
+        if (err < 0)
+                return err;
+        if (!early_console_dev.con->write)
+                return -ENODEV;
+
+
+        register_console(early_console_dev.con);
+        return 0;
+}