tty/serial: change of_serial to use new of_property_read_u32() api

Simplifies the code a bit and drops a few lines.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 15 insertions, 22 deletions

diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index 36038ed8f09..dbfbfda2753 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -32,17 +32,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
 {
         struct resource resource;
         struct device_node *np = ofdev->dev.of_node;
-        const __be32 *clk, *spd;
-        const __be32 *prop;
-        int ret, prop_size;
+        u32 clk, spd, prop;
+        int ret;
 
         memset(port, 0, sizeof *port);
-        spd = of_get_property(np, "current-speed", NULL);
-        clk = of_get_property(np, "clock-frequency", NULL);
-        if (!clk) {
+        if (of_property_read_u32(np, "clock-frequency", &clk)) {
                 dev_warn(&ofdev->dev, "no clock-frequency property set\n");
                 return -ENODEV;
         }
+        /* If current-speed was set, then try not to change it. */
+        if (of_property_read_u32(np, "current-speed", &spd) == 0)
+                port->custom_divisor = clk / (16 * spd);
 
         ret = of_address_to_resource(np, 0, &resource);
         if (ret) {
@@ -54,20 +54,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
         port->mapbase = resource.start;
 
         /* Check for shifted address mapping */
-        prop = of_get_property(np, "reg-offset", &prop_size);
-        if (prop && (prop_size == sizeof(u32)))
-                port->mapbase += be32_to_cpup(prop);
+        if (of_property_read_u32(np, "reg-offset", &prop) == 0)
+                port->mapbase += prop;
 
         /* Check for registers offset within the devices address range */
-        prop = of_get_property(np, "reg-shift", &prop_size);
-        if (prop && (prop_size == sizeof(u32)))
-                port->regshift = be32_to_cpup(prop);
+        if (of_property_read_u32(np, "reg-shift", &prop) == 0)
+                port->regshift = prop;
 
         port->irq = irq_of_parse_and_map(np, 0);
         port->iotype = UPIO_MEM;
-        prop = of_get_property(np, "reg-io-width", &prop_size);
-        if (prop && (prop_size == sizeof(u32))) {
-                switch (be32_to_cpup(prop)) {
+        if (of_property_read_u32(np, "reg-io-width", &prop) == 0) {
+                switch (prop) {
                 case 1:
                         port->iotype = UPIO_MEM;
                         break;
@@ -75,21 +72,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
                         port->iotype = UPIO_MEM32;
                         break;
                 default:
-                        dev_warn(&ofdev->dev,
-                                 "unsupported io width (%d bytes)\n",
-                                 be32_to_cpup(prop));
+                        dev_warn(&ofdev->dev, "unsupported reg-io-width (%d)\n",
+                                 prop);
                         return -EINVAL;
                 }
         }
 
         port->type = type;
-        port->uartclk = be32_to_cpup(clk);
+        port->uartclk = clk;
         port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP
                 | UPF_FIXED_PORT | UPF_FIXED_TYPE;
         port->dev = &ofdev->dev;
-        /* If current-speed was set, then try not to change it. */
-        if (spd)
-                port->custom_divisor = be32_to_cpup(clk) / (16 * (be32_to_cpup(spd)));
 
         return 0;
 }