ns9xxx: move registration of serial8250 to a dedicated file

Now the needed structs are allocated dynamically from __init code reducing
memory usage if the kernel runs on a board different from a9m9750dev.

Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/arch/arm/mach-ns9xxx/plat-serial8250.c b/arch/arm/mach-ns9xxx/plat-serial8250.c
new file mode 100644
index 000000000000..5aa5d9baf8c8
--- /dev/null
+++ b/arch/arm/mach-ns9xxx/plat-serial8250.c
@@ -0,0 +1,69 @@
+/*
+ * arch/arm/mach-ns9xxx/plat-serial8250.c
+ *
+ * Copyright (C) 2008 by Digi International Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+#include <linux/platform_device.h>
+#include <linux/serial_8250.h>
+
+#include <asm/arch-ns9xxx/regs-board-a9m9750dev.h>
+#include <asm/arch-ns9xxx/board.h>
+
+#define DRIVER_NAME "serial8250"
+
+static int __init ns9xxx_plat_serial8250_init(void)
+{
+        struct plat_serial8250_port *pdata;
+        struct platform_device *pdev;
+        int ret = -ENOMEM;
+        int i;
+
+        if (!board_is_a9m9750dev())
+                return -ENODEV;
+
+        pdev = platform_device_alloc(DRIVER_NAME, 0);
+        if (!pdev)
+                goto err;
+
+        pdata = kzalloc(5 * sizeof(*pdata), GFP_KERNEL);
+        if (!pdata)
+                goto err;
+
+        pdev->dev.platform_data = pdata;
+
+        pdata[0].iobase = FPGA_UARTA_BASE;
+        pdata[1].iobase = FPGA_UARTB_BASE;
+        pdata[2].iobase = FPGA_UARTC_BASE;
+        pdata[3].iobase = FPGA_UARTD_BASE;
+
+        for (i = 0; i < 4; ++i) {
+                pdata[i].membase = (void __iomem *)pdata[i].iobase;
+                pdata[i].mapbase = pdata[i].iobase;
+                pdata[i].iotype = UPIO_MEM;
+                pdata[i].uartclk = 18432000;
+                pdata[i].flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
+        }
+
+        pdata[0].irq = IRQ_FPGA_UARTA;
+        pdata[1].irq = IRQ_FPGA_UARTB;
+        pdata[2].irq = IRQ_FPGA_UARTC;
+        pdata[3].irq = IRQ_FPGA_UARTD;
+
+        ret = platform_device_add(pdev);
+        if (ret) {
+err:
+                platform_device_put(pdev);
+
+                printk(KERN_WARNING "Could not add %s (errno=%d)\n",
+                                DRIVER_NAME, ret);
+        }
+
+        return 0;
+}
+
+arch_initcall(ns9xxx_plat_serial8250_init);