arch/mips/lasat/serial.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Registration of Lasat UART platform device.
   4  *
   5  *  Copyright (C) 2007  Brian Murphy <[email protected]>
   6  */
   7 #include <linux/errno.h>
   8 #include <linux/init.h>
   9 #include <linux/ioport.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/serial_8250.h>
  12
  13 #include <asm/lasat/lasat.h>
  14 #include <asm/lasat/serial.h>
  15
  16 static struct resource lasat_serial_res[2] __initdata;
  17
  18 static struct plat_serial8250_port lasat_serial8250_port[] = {
  19         {
  20                 .iotype         = UPIO_MEM,
  21                 .flags          = UPF_IOREMAP | UPF_BOOT_AUTOCONF |
  22                                   UPF_SKIP_TEST,
  23         },
  24         {},
  25 };
  26
  27 static __init int lasat_uart_add(void)
  28 {
  29         struct platform_device *pdev;
  30         int retval;
  31
  32         pdev = platform_device_alloc("serial8250", -1);
  33         if (!pdev)
  34                 return -ENOMEM;
  35
  36         if (!IS_LASAT_200()) {
  37                 lasat_serial_res[0].start = KSEG1ADDR(LASAT_UART_REGS_BASE_100);
  38                 lasat_serial_res[0].end = lasat_serial_res[0].start + LASAT_UART_REGS_SHIFT_100 * 8 - 1;
  39                 lasat_serial_res[0].flags = IORESOURCE_MEM;
  40                 lasat_serial_res[1].start = LASATINT_UART_100;
  41                 lasat_serial_res[1].end = LASATINT_UART_100;
  42                 lasat_serial_res[1].flags = IORESOURCE_IRQ;
  43
  44                 lasat_serial8250_port[0].mapbase = LASAT_UART_REGS_BASE_100;
  45                 lasat_serial8250_port[0].uartclk = LASAT_BASE_BAUD_100 * 16;
  46                 lasat_serial8250_port[0].regshift = LASAT_UART_REGS_SHIFT_100;
  47                 lasat_serial8250_port[0].irq = LASATINT_UART_100;
  48         } else {
  49                 lasat_serial_res[0].start = KSEG1ADDR(LASAT_UART_REGS_BASE_200);
  50                 lasat_serial_res[0].end = lasat_serial_res[0].start + LASAT_UART_REGS_SHIFT_200 * 8 - 1;
  51                 lasat_serial_res[0].flags = IORESOURCE_MEM;
  52                 lasat_serial_res[1].start = LASATINT_UART_200;
  53                 lasat_serial_res[1].end = LASATINT_UART_200;
  54                 lasat_serial_res[1].flags = IORESOURCE_IRQ;
  55
  56                 lasat_serial8250_port[0].mapbase = LASAT_UART_REGS_BASE_200;
  57                 lasat_serial8250_port[0].uartclk = LASAT_BASE_BAUD_200 * 16;
  58                 lasat_serial8250_port[0].regshift = LASAT_UART_REGS_SHIFT_200;
  59                 lasat_serial8250_port[0].irq = LASATINT_UART_200;
  60         }
  61
  62         pdev->id = PLAT8250_DEV_PLATFORM;
  63         pdev->dev.platform_data = lasat_serial8250_port;
  64
  65         retval = platform_device_add_resources(pdev, lasat_serial_res, ARRAY_SIZE(lasat_serial_res));
  66         if (retval)
  67                 goto err_free_device;
  68
  69         retval = platform_device_add(pdev);
  70         if (retval)
  71                 goto err_free_device;
  72
  73         return 0;
  74
  75 err_free_device:
  76         platform_device_put(pdev);
  77
  78         return retval;
  79 }
  80 device_initcall(lasat_uart_add);