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authorLinus Torvalds <torvalds@linux-foundation.org>2011-04-01 08:54:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-04-01 08:54:14 -0700
commitafdef69c7ff7d0bf59e3cafc187aefb12878dbe3 (patch)
tree6b8e341c9a25b3e66d6e8027a03c76afd6508d0d /drivers
parent84daeb09ef2b11cb0b29e100766e38e206c8bc47 (diff)
parent47c7c97a93a5b8f719093dbf83555090b3b8228b (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc32: Pass task_struct to schedule_tail() in ret_from_fork apbuart: Depend upon sparc. sparc64: Fix section mis-match errors. sparc32,leon: Fixed APBUART frequency detection sparc32, leon: APBUART driver must use archdata to get IRQ number sparc: Hook up syncfs system call.
Diffstat (limited to 'drivers')
-rw-r--r--drivers/tty/serial/Kconfig2
-rw-r--r--drivers/tty/serial/apbuart.c34
2 files changed, 12 insertions, 24 deletions
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index e1aee37270f..80484af781e 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1506,7 +1506,7 @@ config SERIAL_BCM63XX_CONSOLE
config SERIAL_GRLIB_GAISLER_APBUART
tristate "GRLIB APBUART serial support"
- depends on OF
+ depends on OF && SPARC
select SERIAL_CORE
---help---
Add support for the GRLIB APBUART serial port.
diff --git a/drivers/tty/serial/apbuart.c b/drivers/tty/serial/apbuart.c
index 1ab999b04ef..19a943693e4 100644
--- a/drivers/tty/serial/apbuart.c
+++ b/drivers/tty/serial/apbuart.c
@@ -555,10 +555,9 @@ static struct uart_driver grlib_apbuart_driver = {
static int __devinit apbuart_probe(struct platform_device *op)
{
- int i = -1;
+ int i;
struct uart_port *port = NULL;
- i = 0;
for (i = 0; i < grlib_apbuart_port_nr; i++) {
if (op->dev.of_node == grlib_apbuart_nodes[i])
break;
@@ -566,6 +565,7 @@ static int __devinit apbuart_probe(struct platform_device *op)
port = &grlib_apbuart_ports[i];
port->dev = &op->dev;
+ port->irq = op->archdata.irqs[0];
uart_add_one_port(&grlib_apbuart_driver, (struct uart_port *) port);
@@ -598,24 +598,12 @@ static struct platform_driver grlib_apbuart_of_driver = {
static int grlib_apbuart_configure(void)
{
- struct device_node *np, *rp;
- const u32 *prop;
- int freq_khz, line = 0;
-
- /* Get bus frequency */
- rp = of_find_node_by_path("/");
- if (!rp)
- return -ENODEV;
- rp = of_get_next_child(rp, NULL);
- if (!rp)
- return -ENODEV;
- prop = of_get_property(rp, "clock-frequency", NULL);
- if (!prop)
- return -ENODEV;
- freq_khz = *prop;
+ struct device_node *np;
+ int line = 0;
for_each_matching_node(np, apbuart_match) {
- const int *irqs, *ampopts;
+ const int *ampopts;
+ const u32 *freq_hz;
const struct amba_prom_registers *regs;
struct uart_port *port;
unsigned long addr;
@@ -623,11 +611,11 @@ static int grlib_apbuart_configure(void)
ampopts = of_get_property(np, "ampopts", NULL);
if (ampopts && (*ampopts == 0))
continue; /* Ignore if used by another OS instance */
-
- irqs = of_get_property(np, "interrupts", NULL);
regs = of_get_property(np, "reg", NULL);
+ /* Frequency of APB Bus is frequency of UART */
+ freq_hz = of_get_property(np, "freq", NULL);
- if (!irqs || !regs)
+ if (!regs || !freq_hz || (*freq_hz == 0))
continue;
grlib_apbuart_nodes[line] = np;
@@ -638,12 +626,12 @@ static int grlib_apbuart_configure(void)
port->mapbase = addr;
port->membase = ioremap(addr, sizeof(struct grlib_apbuart_regs_map));
- port->irq = *irqs;
+ port->irq = 0;
port->iotype = UPIO_MEM;
port->ops = &grlib_apbuart_ops;
port->flags = UPF_BOOT_AUTOCONF;
port->line = line;
- port->uartclk = freq_khz * 1000;
+ port->uartclk = *freq_hz;
port->fifosize = apbuart_scan_fifo_size((struct uart_port *) port, line);
line++;