[MIPS] Use platform_device for Cobalt UART

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 85 insertions, 0 deletions

diff --git a/arch/mips/cobalt/serial.c b/arch/mips/cobalt/serial.c
new file mode 100644
index 000000000000..c27116599a5f
--- /dev/null
+++ b/arch/mips/cobalt/serial.c
@@ -0,0 +1,85 @@
+/*
+ *  Registration of Cobalt UART platform device.
+ *
+ *  Copyright (C) 2007  Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/serial_8250.h>
+
+#include <cobalt.h>
+
+static struct resource cobalt_uart_resource[] __initdata = {
+        {
+                .start  = 0x1c800000,
+                .end    = 0x1c800007,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = COBALT_SERIAL_IRQ,
+                .end    = COBALT_SERIAL_IRQ,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct plat_serial8250_port cobalt_serial8250_port[] = {
+        {
+                .irq            = COBALT_SERIAL_IRQ,
+                .uartclk        = 18432000,
+                .iotype         = UPIO_MEM,
+                .flags          = UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+                .mapbase        = 0x1c800000,
+        },
+        {},
+};
+
+static __init int cobalt_uart_add(void)
+{
+        struct platform_device *pdev;
+        int retval;
+
+        /*
+         * Cobalt Qube1 and RAQ1 have no UART.
+         */
+        if (cobalt_board_id <= COBALT_BRD_ID_RAQ1)
+                return 0;
+
+        pdev = platform_device_alloc("serial8250", -1);
+        if (!pdev)
+                return -ENOMEM;
+
+        pdev->id = PLAT8250_DEV_PLATFORM;
+        pdev->dev.platform_data = cobalt_serial8250_port;
+
+        retval = platform_device_add_resources(pdev, cobalt_uart_resource, ARRAY_SIZE(cobalt_uart_resource));
+        if (retval)
+                goto err_free_device;
+
+        retval = platform_device_add(pdev);
+        if (retval)
+                goto err_free_device;
+
+        return 0;
+
+err_free_device:
+        platform_device_put(pdev);
+
+        return retval;
+}
+device_initcall(cobalt_uart_add);