Merge tag 'devicetree-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull second batch of devicetree updates from Rob Herring:
 "As Grant mentioned in the first devicetree pull request, here is the
  2nd batch of DT changes for 4.1.  The main remaining item here is the
  endianness bindings and related 8250 driver support.

   - DT endianness specification bindings

   - big-endian 8250 serial support

   - DT overlay unittest updates

   - various DT doc updates

   - compile fixes for OF_IRQ=n"

* tag 'devicetree-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  frv: add io{read,write}{16,32}be functions
  mn10300: add io{read,write}{16,32}be functions
  Documentation: DT bindings: add doc for Altera's SoCFPGA platform
  of: base: improve of_get_next_child() kernel-doc
  Doc: dt: arch_timer: discourage clock-frequency use
  of: unittest: overlay: Keep track of created overlays
  of/fdt: fix allocation size for device node path
  serial: of_serial: Support big-endian register accesses
  serial: 8250: Add support for big-endian MMIO accesses
  of: Document {little,big,native}-endian bindings
  of/fdt: Add endianness helper function for early init code
  of: Add helper function to check MMIO register endianness
  of/fdt: Remove "reg" data prints from early_init_dt_scan_memory
  of: add vendor prefix for Artesyn
  of: Add dummy of_irq_to_resource_table() for IRQ_OF=n
  of: OF_IRQ should depend on IRQ_DOMAIN

3 files changed, 27 insertions, 1 deletions

diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index 422ebea96a64..4506e405c8f3 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -450,6 +450,18 @@ static unsigned int mem32_serial_in(struct uart_port *p, int offset)
         return readl(p->membase + offset);
 }
 
+static void mem32be_serial_out(struct uart_port *p, int offset, int value)
+{
+        offset = offset << p->regshift;
+        iowrite32be(value, p->membase + offset);
+}
+
+static unsigned int mem32be_serial_in(struct uart_port *p, int offset)
+{
+        offset = offset << p->regshift;
+        return ioread32be(p->membase + offset);
+}
+
 static unsigned int io_serial_in(struct uart_port *p, int offset)
 {
         offset = offset << p->regshift;
@@ -488,6 +500,11 @@ static void set_io_from_upio(struct uart_port *p)
                 p->serial_out = mem32_serial_out;
                 break;
 
+        case UPIO_MEM32BE:
+                p->serial_in = mem32be_serial_in;
+                p->serial_out = mem32be_serial_out;
+                break;
+
 #if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X)
         case UPIO_AU:
                 p->serial_in = au_serial_in;
@@ -513,6 +530,7 @@ serial_port_out_sync(struct uart_port *p, int offset, int value)
         switch (p->iotype) {
         case UPIO_MEM:
         case UPIO_MEM32:
+        case UPIO_MEM32BE:
         case UPIO_AU:
                 p->serial_out(p, offset, value);
                 p->serial_in(p, UART_LCR);      /* safe, no side-effects */
@@ -2748,6 +2766,7 @@ static int serial8250_request_std_resource(struct uart_8250_port *up)
         case UPIO_AU:
         case UPIO_TSI:
         case UPIO_MEM32:
+        case UPIO_MEM32BE:
         case UPIO_MEM:
                 if (!port->mapbase)
                         break;
@@ -2784,6 +2803,7 @@ static void serial8250_release_std_resource(struct uart_8250_port *up)
         case UPIO_AU:
         case UPIO_TSI:
         case UPIO_MEM32:
+        case UPIO_MEM32BE:
         case UPIO_MEM:
                 if (!port->mapbase)
                         break;
diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
index 8e119682266a..6c0fd8b9d1c3 100644
--- a/drivers/tty/serial/8250/8250_early.c
+++ b/drivers/tty/serial/8250/8250_early.c
@@ -42,6 +42,8 @@ unsigned int __weak __init serial8250_early_in(struct uart_port *port, int offse
                 return readb(port->membase + offset);
         case UPIO_MEM32:
                 return readl(port->membase + (offset << 2));
+        case UPIO_MEM32BE:
+                return ioread32be(port->membase + (offset << 2));
         case UPIO_PORT:
                 return inb(port->iobase + offset);
         default:
@@ -58,6 +60,9 @@ void __weak __init serial8250_early_out(struct uart_port *port, int offset, int
         case UPIO_MEM32:
                 writel(value, port->membase + (offset << 2));
                 break;
+        case UPIO_MEM32BE:
+                iowrite32be(value, port->membase + (offset << 2));
+                break;
         case UPIO_PORT:
                 outb(value, port->iobase + offset);
                 break;
diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index aa00154c4a6d..5b73afb9f9f3 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -116,7 +116,8 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
                         port->iotype = UPIO_MEM;
                         break;
                 case 4:
-                        port->iotype = UPIO_MEM32;
+                        port->iotype = of_device_is_big_endian(np) ?
+                                       UPIO_MEM32BE : UPIO_MEM32;
                         break;
                 default:
                         dev_warn(&ofdev->dev, "unsupported reg-io-width (%d)\n",