1 /* 2 * Registration of Cobalt UART platform device. 3 * 4 * Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 #include <linux/errno.h> 21 #include <linux/init.h> 22 #include <linux/ioport.h> 23 #include <linux/platform_device.h> 24 #include <linux/serial_8250.h> 25 26 #include <cobalt.h> 27 #include <irq.h> 28 29 static struct resource cobalt_uart_resource[] __initdata = { 30 { 31 .start = 0x1c800000, 32 .end = 0x1c800007, 33 .flags = IORESOURCE_MEM, 34 }, 35 { 36 .start = SERIAL_IRQ, 37 .end = SERIAL_IRQ, 38 .flags = IORESOURCE_IRQ, 39 }, 40 }; 41 42 static struct plat_serial8250_port cobalt_serial8250_port[] = { 43 { 44 .irq = SERIAL_IRQ, 45 .uartclk = 18432000, 46 .iotype = UPIO_MEM, 47 .flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, 48 .mapbase = 0x1c800000, 49 }, 50 {}, 51 }; 52 53 static __init int cobalt_uart_add(void) 54 { 55 struct platform_device *pdev; 56 int retval; 57 58 /* 59 * Cobalt Qube1 has no UART. 60 */ 61 if (cobalt_board_id == COBALT_BRD_ID_QUBE1) 62 return 0; 63 64 pdev = platform_device_alloc("serial8250", -1); 65 if (!pdev) 66 return -ENOMEM; 67 68 pdev->id = PLAT8250_DEV_PLATFORM; 69 pdev->dev.platform_data = cobalt_serial8250_port; 70 71 retval = platform_device_add_resources(pdev, cobalt_uart_resource, ARRAY_SIZE(cobalt_uart_resource)); 72 if (retval) 73 goto err_free_device; 74 75 retval = platform_device_add(pdev); 76 if (retval) 77 goto err_free_device; 78 79 return 0; 80 81 err_free_device: 82 platform_device_put(pdev); 83 84 return retval; 85 } 86 device_initcall(cobalt_uart_add); 87