【求助】Linux系统下驱动电容屏

kevin.z.y

用的CB1板子，接9.7寸LCD和9.7寸电容屏，在Lubuntu系统下，LCD没问题了，触摸屏初始化失败，register chrdev failed。
具体打印信息见后面。

我对硬件驱动不太懂，琢磨挺长时间了，请大侠指点！

电容屏采用的是FT5406的IC，在fex文件中的配置如下：
[twi2_para]
twi2_used                = 1
twi2_scl                 = portB20<2><default><default><default>
twi2_sda                 = portB21<2><default><default><default>

[ctp_para]
ctp_used                 =1
ctp_name                 = "ft5x_ts"
ctp_twi_id               = 2
ctp_twi_addr             =0x38
ctp_screen_max_x         = 1024
ctp_screen_max_y         = 768
ctp_revert_x_flag        = 0
ctp_revert_y_flag        = 0
ctp_exchange_x_y_flag    = 0
ctp_int_port             = portH21<6><default><default><default>
ctp_wakeup               = portB13<1><default><default><default>


初始化过程打印信息：
[   11.744328] ===========================ft5x_ts_init=====================
[   11.775276] ctp_fetch_sysconfig_para.
[   11.788402] ctp_fetch_sysconfig_para: after: ctp_twi_addr is 0x38, dirty_addr_buf: 0x38. dirty_addr_buf[1]: 0xfffe
[   11.808737] ctp_fetch_sysconfig_para: ctp_twi_id is 2.
[   11.818502] ctp_fetch_sysconfig_para: screen_max_x = 1024.
[   11.828554] ctp_fetch_sysconfig_para: screen_max_y = 768.
[   11.838403] ctp_fetch_sysconfig_para: revert_x_flag = 0.
[   11.848162] ctp_fetch_sysconfig_para: revert_y_flag = 0.
[   11.858273] ctp_fetch_sysconfig_para: exchange_x_y_flag = 0.
[   11.871678] ft5x_ts_init: after fetch_sysconfig_para:  normal_i2c: 0x38. normal_i2c[1]: 0xfffe
[   11.885615] ctp_init_platform_resource: tp_reset request gpio fail!
[   11.908048] ctp_init_platform_resource: No power port feature present.
[   11.924059] ctp_wakeup.
[   12.012141] ctp_detect: Detected chip ft5x_ts at adapter 2, address 0x38
[   12.035807] ====ft5x_ts_probe begin=====.  
[   12.059524] input: ft5x_ts as /devices/platform/sunxi-i2c.2/i2c-2/2-0038/input/input5
[   12.083827] ctp_set_irq_mode: config gpio to int mode.
[   12.095003] ctp_set_irq_mode, 225: gpio_int_info, port = 8, port_num = 21.
[   12.103895]  INTERRUPT CONFIG
[   12.110449] IRQ handler type mismatch for IRQ 28
[   12.117841] current handler: sunxi-gpio
........
[   12.415451] ft5x_ts 2-0038: ft5x_ts_probe: request irq failed
[   12.424842] ------------[ cut here ]------------
[   12.434928] WARNING: at kernel/irq/manage.c:428 enable_irq+0x3c/0x74()
[   12.444314] Unbalanced enable for IRQ 28
[   12.450058] Modules linked in:
。。。。。。
[   12.761702] ---[ end trace 46b6758855862a08 ]---
[   12.769970] ------------[ cut here ]------------
[   12.780229] WARNING: at kernel/irq/manage.c:1196 __free_irq+0x98/0x1c4()
[   12.790049] Trying to free already-free IRQ 28
[   12.796313] Modules linked in:
......
[   13.122440] ---[ end trace 46b6758855862a09 ]---
[   13.129490] ==singlethread error =
[   13.137361] ft5x_ts: probe of 2-0038 failed with error -16
[   13.150365] sunxi-rtc sunxi-rtc: setting system clock to 2010-01-01 00:00:17 UTC (1262304017)
[   13.160866] ALSA device list:
[   13.166902]   #0: sunxi-CODEC  Audio Codec
[   13.173081]   #1: sunxi-sndhdmi
[   17.153374] EXT4-fs (mmcblk0p2): ext4_orphan_cleanup: deleting unreferenced inode 284225
[   17.161794] EXT4-fs (mmcblk0p2): ext4_orphan_cleanup: deleting unreferenced inode 284224
[   17.169667] EXT4-fs (mmcblk0p2): ext4_orphan_cleanup: deleting unreferenced inode 284223
[   17.174662] EXT4-fs (mmcblk0p2): 3 orphan inodes deleted
[   17.184144] EXT4-fs (mmcblk0p2): recovery complete
[   17.935720] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[   17.949398] VFS: Mounted root (ext4 filesystem) on device 179:2.
[   17.959207] devtmpfs: mounted
[   17.965942] Freeing init memory: 172K
[   19.752612] udevd[164]: starting version 175
[   21.376643] ===========================ft5x_ts_init=====================
[   21.496236] ctp_fetch_sysconfig_para.
[   21.607299] ctp_fetch_sysconfig_para: after: ctp_twi_addr is 0x38, dirty_addr_buf: 0x38. dirty_addr_buf[1]: 0xfffe
[   21.905652] ctp_fetch_sysconfig_para: ctp_twi_id is 2.
[   22.055776] ctp_fetch_sysconfig_para: screen_max_x = 1024.
[   22.144495] ctp_fetch_sysconfig_para: screen_max_y = 768.
[   22.218105] ctp_fetch_sysconfig_para: revert_x_flag = 0.
[   22.247594] ctp_fetch_sysconfig_para: revert_y_flag = 0.
[   22.262843] ctp_fetch_sysconfig_para: exchange_x_y_flag = 0.
[   22.277015] ft5x_ts_init: after fetch_sysconfig_para:  normal_i2c: 0x38. normal_i2c[1]: 0xfffe
[   22.291022] ctp_init_platform_resource: tp_reset request gpio fail!
[   22.302829] ctp_init_platform_resource: No power port feature present.
[   22.310889] ctp_wakeup.
[   22.363540] <3>drivers/input/touchscreen/ft5x_ts.c:register chrdev failed
[   25.349423] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)

swedrf123

有点看不懂矣

inerta

楼主电容屏多少钱啊？质量怎么样？