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驱动首先放在 kernel 3.2.0 driver/spi/ 下面
// 1. 更名为 wk2124A.h wk2124A.c // 2. 在 Kconfig 加入如下配置： 429 config SPI_WK2124A 430 tristate "WK2124A spi to 4 uart drvier" 431 depends on SPI 432 help 433 SPI driver for wk2124 cs1 spi to 4 wire uart IC driver. // 3 . 在 Makefile 里面加入： 61 obj-$(CONFIG_SPI_WK2124A) += wk2124A.o // 4. 修改驱动源码 // 5. 在 头文件中修改： // 修改主次设备号 144 #define SERIAL_WK2124A_MAJOR 190 145 #define CALLOUT_WK2124A_MAJOR 191 148 /* am33xx irq */ 149 #define GPIO_TO_PIN(bank, gpio) (32 * (bank) + (gpio)) 150 #define IH2_BASE 32 151 #define OMAP_MAX_GPIO_LINES 192 152 #define IH_GPIO_BASE (128 + IH2_BASE) 153 #define IH_MPUIO_BASE (OMAP_MAX_GPIO_LINES + IH_GPIO_BASE) 154 #define OMAP_IRQ_END (IH_MPUIO_BASE + 16) 155 #define OMAP_GPIO_IS_MPUIO(nr) ((nr) >= OMAP_MAX_GPIO_LINES) 156 #define OMAP_GPIO_IRQ(nr) (OMAP_GPIO_IS_MPUIO(nr) ? \ 157 IH_MPUIO_BASE + ((nr) & 0x0f) : \ 158 IH_GPIO_BASE + (nr)) 159 160 //wk2xxx hardware configuration 161 #define IRQ_WK2124A OMAP_GPIO_IRQ(GPIO_TO_PIN(0, 23)) // 这段代码是加入 AM335X 中断的选择 // 在 wk2124A.c 里面修改 29 #include "wk2124A.h" 1476 static struct uart_driver wk2124_uart_driver = { 1477 owner: THIS_MODULE, 1478 major: SERIAL_WK2124A_MAJOR, 1479 #ifdef CONFIG_DEVFS_FS 1480 driver_name: "ttySWZA", 1481 dev_name: "ttysWZA", 1482 #else 1483 driver_name: "ttySWZA", 1484 dev_name: "ttysWZA", 1485 #endif 1486 minor: MINOR_START, 1487 nr: NR_PORTS, 1488 cons: NULL//WK2Xxx_CONSOLE, 1489 }; 1595 static struct spi_driver wk2124A_driver = { 1596 .driver = { 1597 .name = "wk2124A", 1598 .bus = &spi_bus_type, 1599 .owner = THIS_MODULE, 1600 }, 1601 1602 .probe = wk2124A_probe, // 相应的， probe 的名字也要修改 1603 .remove = __devexit_p(wk2124_remove), 1604 .resume = wk2124_resume, 1605 }; 1607 static int __init wk2124A_init(void) 1608 { 1609 int retval; 1610 1611 retval = spi_register_driver(&wk2124A_driver); 1612 printk(KERN_ALERT "rgister spi return v = :%d\n", retval); 1613 1614 return retval; 1615 } 1616 1617 static void __exit wk2124A_exit(void) 1618 { 1619 spi_unregister_driver(&wk2124A_driver); 1620 printk("TEST_REG:quit "); 1621 } 1622 1623 module_init(wk2124A_init); 1624 module_exit(wk2124A_exit); 1625 1626 MODULE_AUTHOR("WKIC Ltd"); 1627 MODULE_DESCRIPTION("wk2xxx generic serial port driver"); 1628 MODULE_LICENSE("GPL"); // 修改 init 函数名字以及 驱动名字 841 static struct spi_board_info am335x_spi0_slave_info[] = { 842 #if 0 843 { 844 .modalias = "spidev", 845 .max_speed_hz = 10000000,//48Mbps 846 .bus_num = 1, 847 .chip_select = 0, 848 .mode = SPI_MODE_0, 849 }, 850 #endif 851 #if 1 852 { 853 .modalias = "wk2124A", // compiler 854 .mode = SPI_MODE_0, 855 .max_speed_hz = 10000000, // speed 10Mbps 856 .bus_num = 1, // spi0 bus 857 .chip_select = 0, // spi_cs0 858 }, 859 #endif 860 };