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Commit b84e7731 authored by Grant Likely's avatar Grant Likely
Browse files

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: default avatarGrant Likely <grant.likely@secretlab.ca>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
parent f09bc831

drivers/tty/serial/of_serial.c

+15 −22
Original line number Diff line number Diff line
@@ -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;

}