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Diffstat (limited to 'arch/mips/cobalt/serial.c')
-rw-r--r--arch/mips/cobalt/serial.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/mips/cobalt/serial.c b/arch/mips/cobalt/serial.c
new file mode 100644
index 000000000..5fb676719
--- /dev/null
+++ b/arch/mips/cobalt/serial.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Registration of Cobalt UART platform device.
+ *
+ * Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
+ */
+#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>
+#include <irq.h>
+
+static struct resource cobalt_uart_resource[] __initdata = {
+ {
+ .start = 0x1c800000,
+ .end = 0x1c800007,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = SERIAL_IRQ,
+ .end = SERIAL_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct plat_serial8250_port cobalt_serial8250_port[] = {
+ {
+ .irq = 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 has no UART.
+ */
+ if (cobalt_board_id == COBALT_BRD_ID_QUBE1)
+ 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);