5 files changed, 63 insertions, 19 deletions

diff --git a/arch/ppc/Kconfig b/arch/ppc/Kconfig
index be4e629e69d0..a862c037c65d 100644
--- a/arch/ppc/Kconfig
+++ b/arch/ppc/Kconfig
@@ -878,6 +878,13 @@ config MPC10X_STORE_GATHERING
         bool "Enable MPC10x store gathering"
         depends on MPC10X_BRIDGE
 
+config SANDPOINT_ENABLE_UART1
+        bool "Enable DUART mode on Sandpoint"
+        depends on SANDPOINT
+        help
+          If this option is enabled then the MPC824x processor will run
+          in DUART mode instead of UART mode.
+
 config CPC710_DATA_GATHERING
         bool "Enable CPC710 data gathering"
         depends on K2
diff --git a/arch/ppc/configs/sandpoint_defconfig b/arch/ppc/configs/sandpoint_defconfig
index 0f4393a07f82..fb493a67c60d 100644
--- a/arch/ppc/configs/sandpoint_defconfig
+++ b/arch/ppc/configs/sandpoint_defconfig
@@ -437,7 +437,7 @@ CONFIG_SOUND_GAMEPORT=y
 #
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
-CONFIG_SERIAL_8250_NR_UARTS=2
+CONFIG_SERIAL_8250_NR_UARTS=4
 # CONFIG_SERIAL_8250_EXTENDED is not set
 
 #
diff --git a/arch/ppc/platforms/sandpoint.c b/arch/ppc/platforms/sandpoint.c
index 8b149c2fc54f..21e31346b12b 100644
--- a/arch/ppc/platforms/sandpoint.c
+++ b/arch/ppc/platforms/sandpoint.c
@@ -311,19 +311,22 @@ sandpoint_setup_arch(void)
         {
                 bd_t *bp = (bd_t *)__res;
                 struct plat_serial8250_port *pdata;
-                pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC10X_DUART);
 
+                pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC10X_UART0);
                 if (pdata)
                 {
                         pdata[0].uartclk = bp->bi_busfreq;
-                        pdata[0].membase = ioremap(pdata[0].mapbase, 0x100);
+                }
 
-                        /* this disables the 2nd serial port on the DUART
-                         * since the sandpoint does not have it connected */
-                        pdata[1].uartclk = 0;
-                        pdata[1].irq = 0;
-                        pdata[1].mapbase = 0;
+#ifdef CONFIG_SANDPOINT_ENABLE_UART1
+                pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC10X_UART1);
+                if (pdata)
+                {
+                        pdata[0].uartclk = bp->bi_busfreq;
                 }
+#else
+                ppc_sys_device_remove(MPC10X_UART1);
+#endif
         }
 
         printk(KERN_INFO "Motorola SPS Sandpoint Test Platform\n");
diff --git a/arch/ppc/syslib/mpc10x_common.c b/arch/ppc/syslib/mpc10x_common.c
index 8fc5f4154521..87065e2e4c5f 100644
--- a/arch/ppc/syslib/mpc10x_common.c
+++ b/arch/ppc/syslib/mpc10x_common.c
@@ -45,24 +45,29 @@
 #define MPC10X_DMA0_IRQ (EPIC_IRQ_BASE + 1 + NUM_8259_INTERRUPTS)
 #define MPC10X_DMA1_IRQ (EPIC_IRQ_BASE + 2 + NUM_8259_INTERRUPTS)
 #define MPC10X_UART0_IRQ (EPIC_IRQ_BASE + 4 + NUM_8259_INTERRUPTS)
+#define MPC10X_UART1_IRQ (EPIC_IRQ_BASE + 5 + NUM_8259_INTERRUPTS)
 #else
 #define MPC10X_I2C_IRQ -1
 #define MPC10X_DMA0_IRQ -1
 #define MPC10X_DMA1_IRQ -1
 #define MPC10X_UART0_IRQ -1
+#define MPC10X_UART1_IRQ -1
 #endif
 
 static struct fsl_i2c_platform_data mpc10x_i2c_pdata = {
         .device_flags           = 0,
 };
 
-static struct plat_serial8250_port serial_platform_data[] = {
+static struct plat_serial8250_port serial_plat_uart0[] = {
         [0] = {
                 .mapbase        = 0x4500,
                 .iotype         = UPIO_MEM,
                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
         },
-        [1] = {
+        { },
+};
+static struct plat_serial8250_port serial_plat_uart1[] = {
+        [0] = {
                 .mapbase        = 0x4600,
                 .iotype         = UPIO_MEM,
                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
@@ -133,11 +138,17 @@ struct platform_device ppc_sys_platform_devices[] = {
                         },
                 },
         },
-        [MPC10X_DUART] = {
+        [MPC10X_UART0] = {
                 .name = "serial8250",
                 .id     = 0,
-                .dev.platform_data = serial_platform_data,
+                .dev.platform_data = serial_plat_uart0,
         },
+        [MPC10X_UART1] = {
+                .name = "serial8250",
+                .id     = 1,
+                .dev.platform_data = serial_plat_uart1,
+        },
+
 };
 
 /* We use the PCI ID to match on */
@@ -147,10 +158,10 @@ struct ppc_sys_spec ppc_sys_specs[] = {
                 .ppc_sys_name   = "8245",
                 .mask           = 0xFFFFFFFF,
                 .value          = MPC10X_BRIDGE_8245,
-                .num_devices    = 4,
+                .num_devices    = 5,
                 .device_list    = (enum ppc_sys_devices[])
                 {
-                        MPC10X_IIC1, MPC10X_DMA0, MPC10X_DMA1, MPC10X_DUART,
+                        MPC10X_IIC1, MPC10X_DMA0, MPC10X_DMA1, MPC10X_UART0, MPC10X_UART1,
                 },
         },
         {
@@ -180,6 +191,25 @@ struct ppc_sys_spec ppc_sys_specs[] = {
         },
 };
 
+/*
+ * mach_mpc10x_fixup: This function enables DUART mode if it detects
+ * if it detects two UARTS in the platform device entries.
+ */
+static int __init mach_mpc10x_fixup(struct platform_device *pdev)
+{
+        if (strncmp (pdev->name, "serial8250", 10) == 0 && pdev->id == 1)
+                writeb(readb(serial_plat_uart1[0].membase + 0x11) | 0x1,
+                                serial_plat_uart1[0].membase + 0x11);
+        return 0;
+}
+
+static int __init mach_mpc10x_init(void)
+{
+        ppc_sys_device_fixup = mach_mpc10x_fixup;
+        return 0;
+}
+postcore_initcall(mach_mpc10x_init);
+
 /* Set resources to match bridge memory map */
 void __init
 mpc10x_bridge_set_resources(int map, struct pci_controller *hose)
@@ -219,6 +249,7 @@ mpc10x_bridge_set_resources(int map, struct pci_controller *hose)
                                 ppc_md.progress("mpc10x:exit1", 0x100);
         }
 }
+
 /*
  * Do some initialization and put the EUMB registers at the specified address
  * (also map the EPIC registers into virtual space--OpenPIC_Addr will be set).
@@ -411,11 +442,13 @@ mpc10x_bridge_init(struct pci_controller *hose,
         ppc_sys_platform_devices[MPC10X_DMA1].resource[1].start = MPC10X_DMA1_IRQ;
         ppc_sys_platform_devices[MPC10X_DMA1].resource[1].end = MPC10X_DMA1_IRQ;
 
-        serial_platform_data[0].mapbase += phys_eumb_base;
-        serial_platform_data[0].irq = MPC10X_UART0_IRQ;
+        serial_plat_uart0[0].mapbase += phys_eumb_base;
+        serial_plat_uart0[0].irq = MPC10X_UART0_IRQ;
+        serial_plat_uart0[0].membase = ioremap(serial_plat_uart0[0].mapbase, 0x100);
 
-        serial_platform_data[1].mapbase += phys_eumb_base;
-        serial_platform_data[1].irq = MPC10X_UART0_IRQ + 1;
+        serial_plat_uart1[0].mapbase += phys_eumb_base;
+        serial_plat_uart1[0].irq = MPC10X_UART1_IRQ;
+        serial_plat_uart1[0].membase = ioremap(serial_plat_uart1[0].mapbase, 0x100);
 
         /*
          * 8240 erratum 26, 8241/8245 erratum 29, 107 erratum 23: speculative
diff --git a/include/asm-ppc/mpc10x.h b/include/asm-ppc/mpc10x.h
index f5196a4efbe0..77b1e092c206 100644
--- a/include/asm-ppc/mpc10x.h
+++ b/include/asm-ppc/mpc10x.h
@@ -163,7 +163,8 @@ enum ppc_sys_devices {
         MPC10X_IIC1,
         MPC10X_DMA0,
         MPC10X_DMA1,
-        MPC10X_DUART,
+        MPC10X_UART0,
+        MPC10X_UART1,
 };
 
 int mpc10x_bridge_init(struct pci_controller *hose,