Merge tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM soc device tree updates from Olof Johansson:
 "Device tree conversion and enablement branch.  Mostly a bunch of new
  bindings and setup for various platforms, but the Via/Winchip VT8500
  platform is also converted over from being 100% legacy to now use
  device tree for probing.  More of that will come for 3.8."

Trivial conflicts due to removal of vt8500 files, and one documentation
file that was added with slightly different contents both here and in
the USb tree.

* tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (212 commits)
  arm: vt8500: Fixup for missing gpio.h
  ARM: LPC32xx: LED fix in PHY3250 DTS file
  ARM: dt: mmp-dma: add binding file
  arm: vt8500: Update arch-vt8500 to devicetree support.
  arm: vt8500: gpio: Devicetree support for arch-vt8500
  arm: vt8500: doc: Add device tree bindings for arch-vt8500 devices
  arm: vt8500: clk: Add Common Clock Framework support
  video: vt8500: Add devicetree support for vt8500-fb and wm8505-fb
  serial: vt8500: Add devicetree support for vt8500-serial
  rtc: vt8500: Add devicetree support for vt8500-rtc
  arm: vt8500: Add device tree files for VIA/Wondermedia SoC's
  ARM: tegra: Add Avionic Design Tamonten Evaluation Carrier support
  ARM: tegra: Add Avionic Design Medcom-Wide support
  ARM: tegra: Add Avionic Design Plutux support
  ARM: tegra: Add Avionic Design Tamonten support
  ARM: tegra: dts: Add pwm label
  ARM: ux500: Fix SSP register address format
  ARM: ux500: Apply tc3589x's GPIO/IRQ properties to HREF's DT
  ARM: ux500: Remove redundant #gpio-cell properties from Snowball DT
  ARM: ux500: Add all encompassing sound node to the HREF Device Tree
  ...

1 files changed, 53 insertions, 5 deletions

diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c
index 2be006fb3da..205d4cf4a06 100644
--- a/drivers/tty/serial/vt8500_serial.c
+++ b/drivers/tty/serial/vt8500_serial.c
@@ -34,6 +34,7 @@
 #include <linux/slab.h>
 #include <linux/clk.h>
 #include <linux/platform_device.h>
+#include <linux/of.h>
 
 /*
  * UART Register offsets
@@ -76,6 +77,8 @@
 #define RX_FIFO_INTS    (RXFAF | RXFF | RXOVER | PER | FER | RXTOUT)
 #define TX_FIFO_INTS    (TXFAE | TXFE | TXUDR)
 
+#define VT8500_MAX_PORTS        6
+
 struct vt8500_port {
         struct uart_port        uart;
         char                    name[16];
@@ -83,6 +86,13 @@ struct vt8500_port {
         unsigned int            ier;
 };
 
+/*
+ * we use this variable to keep track of which ports
+ * have been allocated as we can't use pdev->id in
+ * devicetree
+ */
+static unsigned long vt8500_ports_in_use;
+
 static inline void vt8500_write(struct uart_port *port, unsigned int val,
                              unsigned int off)
 {
@@ -431,7 +441,7 @@ static int vt8500_verify_port(struct uart_port *port,
         return 0;
 }
 
-static struct vt8500_port *vt8500_uart_ports[4];
+static struct vt8500_port *vt8500_uart_ports[VT8500_MAX_PORTS];
 static struct uart_driver vt8500_uart_driver;
 
 #ifdef CONFIG_SERIAL_VT8500_CONSOLE
@@ -548,7 +558,9 @@ static int __devinit vt8500_serial_probe(struct platform_device *pdev)
 {
         struct vt8500_port *vt8500_port;
         struct resource *mmres, *irqres;
+        struct device_node *np = pdev->dev.of_node;
         int ret;
+        int port;
 
         mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         irqres = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
@@ -559,16 +571,46 @@ static int __devinit vt8500_serial_probe(struct platform_device *pdev)
         if (!vt8500_port)
                 return -ENOMEM;
 
+        if (np)
+                port = of_alias_get_id(np, "serial");
+                if (port > VT8500_MAX_PORTS)
+                        port = -1;
+        else
+                port = -1;
+
+        if (port < 0) {
+                /* calculate the port id */
+                port = find_first_zero_bit(&vt8500_ports_in_use,
+                                        sizeof(vt8500_ports_in_use));
+        }
+
+        if (port > VT8500_MAX_PORTS)
+                return -ENODEV;
+
+        /* reserve the port id */
+        if (test_and_set_bit(port, &vt8500_ports_in_use)) {
+                /* port already in use - shouldn't really happen */
+                return -EBUSY;
+        }
+
         vt8500_port->uart.type = PORT_VT8500;
         vt8500_port->uart.iotype = UPIO_MEM;
         vt8500_port->uart.mapbase = mmres->start;
         vt8500_port->uart.irq = irqres->start;
         vt8500_port->uart.fifosize = 16;
         vt8500_port->uart.ops = &vt8500_uart_pops;
-        vt8500_port->uart.line = pdev->id;
+        vt8500_port->uart.line = port;
         vt8500_port->uart.dev = &pdev->dev;
         vt8500_port->uart.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
-        vt8500_port->uart.uartclk = 24000000;
+
+        vt8500_port->clk = of_clk_get(pdev->dev.of_node, 0);
+        if (vt8500_port->clk) {
+                vt8500_port->uart.uartclk = clk_get_rate(vt8500_port->clk);
+        } else {
+                /* use the default of 24Mhz if not specified and warn */
+                pr_warn("%s: serial clock source not specified\n", __func__);
+                vt8500_port->uart.uartclk = 24000000;
+        }
 
         snprintf(vt8500_port->name, sizeof(vt8500_port->name),
                  "VT8500 UART%d", pdev->id);
@@ -579,7 +621,7 @@ static int __devinit vt8500_serial_probe(struct platform_device *pdev)
                 goto err;
         }
 
-        vt8500_uart_ports[pdev->id] = vt8500_port;
+        vt8500_uart_ports[port] = vt8500_port;
 
         uart_add_one_port(&vt8500_uart_driver, &vt8500_port->uart);
 
@@ -603,12 +645,18 @@ static int __devexit vt8500_serial_remove(struct platform_device *pdev)
         return 0;
 }
 
+static const struct of_device_id wmt_dt_ids[] = {
+        { .compatible = "via,vt8500-uart", },
+        {}
+};
+
 static struct platform_driver vt8500_platform_driver = {
         .probe  = vt8500_serial_probe,
         .remove = __devexit_p(vt8500_serial_remove),
         .driver = {
                 .name = "vt8500_serial",
                 .owner = THIS_MODULE,
+                .of_match_table = of_match_ptr(wmt_dt_ids),
         },
 };
 
@@ -642,4 +690,4 @@ module_exit(vt8500_serial_exit);
 
 MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>");
 MODULE_DESCRIPTION("Driver for vt8500 serial device");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");