1 files changed, 91 insertions, 0 deletions
diff --git a/target/linux/rb532/patches-2.6.28/022-rb532_uart_autodetect.patch b/target/linux/rb532/patches-2.6.28/022-rb532_uart_autodetect.patch
new file mode 100644
index 0000000000..ae42a4dbc5
--- /dev/null
+++ b/target/linux/rb532/patches-2.6.28/022-rb532_uart_autodetect.patch
@@ -0,0 +1,91 @@
+Auto-detection works just fine, so use it instead of specifying the type
+manually. Also define a platform device for the uart, as suggested by
+David Daney.
+
+Signed-off-by: Phil Sutter <n0-1@freewrt.org>
+---
+ arch/mips/rb532/devices.c |   26 ++++++++++++++++++++++++++
+ arch/mips/rb532/serial.c  |    2 +-
+ 2 files changed, 27 insertions(+), 1 deletions(-)
+
+diff --git a/arch/mips/rb532/devices.c b/arch/mips/rb532/devices.c
+index c1c2918..9b6b744 100644
+--- a/arch/mips/rb532/devices.c
++++ b/arch/mips/rb532/devices.c
+@@ -24,6 +24,7 @@
+ #include <linux/mtd/partitions.h>
+ #include <linux/gpio_keys.h>
+ #include <linux/input.h>
++#include <linux/serial_8250.h>
+ 
+ #include <asm/bootinfo.h>
+ 
+@@ -39,6 +40,8 @@
+ #define ETH0_RX_DMA_ADDR  (DMA0_BASE_ADDR + 0 * DMA_CHAN_OFFSET)
+ #define ETH0_TX_DMA_ADDR  (DMA0_BASE_ADDR + 1 * DMA_CHAN_OFFSET)
+ 
++extern unsigned int idt_cpu_freq;
++
+ static struct resource korina_dev0_res[] = {
+ 	{
+ 		.name = "korina_regs",
+@@ -214,12 +217,32 @@ static struct platform_device rb532_wdt = {
+ 	.num_resources	= ARRAY_SIZE(rb532_wdt_res),
+ };
+ 
++static struct plat_serial8250_port rb532_uart_res[] = {
++	{
++		.membase	= (char *)KSEG1ADDR(REGBASE + UART0BASE),
++		.irq		= UART0_IRQ,
++		.regshift	= 2,
++		.iotype		= UPIO_MEM,
++		.flags		= UPF_BOOT_AUTOCONF,
++	},
++	{
++		.flags		= 0,
++	}
++};
++
++static struct platform_device rb532_uart = {
++	.name              = "serial8250",
++	.id                = PLAT8250_DEV_PLATFORM,
++	.dev.platform_data = &rb532_uart_res,
++};
++
+ static struct platform_device *rb532_devs[] = {
+ 	&korina_dev0,
+ 	&nand_slot0,
+ 	&cf_slot0,
+ 	&rb532_led,
+ 	&rb532_button,
++	&rb532_uart,
+ 	&rb532_wdt
+ };
+ 
+@@ -294,6 +317,9 @@ static int __init plat_setup_devices(void)
+ 	/* Initialise the NAND device */
+ 	rb532_nand_setup();
+ 
++	/* set the uart clock to the current cpu frequency */
++	rb532_uart_res[0].uartclk = idt_cpu_freq;
++
+ 	return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
+ }
+ 
+diff --git a/arch/mips/rb532/serial.c b/arch/mips/rb532/serial.c
+index 3e0d7ec..00ed19f 100644
+--- a/arch/mips/rb532/serial.c
++++ b/arch/mips/rb532/serial.c
+@@ -36,7 +36,7 @@
+ extern unsigned int idt_cpu_freq;
+ 
+ static struct uart_port rb532_uart = {
+-	.type = PORT_16550A,
++	.flags = UPF_BOOT_AUTOCONF,
+ 	.line = 0,
+ 	.irq = UART0_IRQ,
+ 	.iotype = UPIO_MEM,
+-- 
+1.5.6.4
+
+