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Linux/drivers/auxdisplay/Kconfig

  1 #
  2 # For a description of the syntax of this configuration file,
  3 # see Documentation/kbuild/kconfig-language.txt.
  4 #
  5 # Auxiliary display drivers configuration.
  6 #
  7 
  8 menuconfig AUXDISPLAY
  9         bool "Auxiliary Display support"
 10         ---help---
 11           Say Y here to get to see options for auxiliary display drivers.
 12           This option alone does not add any kernel code.
 13 
 14           If you say N, all options in this submenu will be skipped and disabled.
 15 
 16 if AUXDISPLAY
 17 
 18 config KS0108
 19         tristate "KS0108 LCD Controller"
 20         depends on PARPORT_PC
 21         default n
 22         ---help---
 23           If you have a LCD controlled by one or more KS0108
 24           controllers, say Y. You will need also another more specific
 25           driver for your LCD.
 26 
 27           Depends on Parallel Port support. If you say Y at
 28           parport, you will be able to compile this as a module (M)
 29           and built-in as well (Y).
 30 
 31           To compile this as a module, choose M here:
 32           the module will be called ks0108.
 33 
 34           If unsure, say N.
 35 
 36 config KS0108_PORT
 37         hex "Parallel port where the LCD is connected"
 38         depends on KS0108
 39         default 0x378
 40         ---help---
 41           The address of the parallel port where the LCD is connected.
 42 
 43           The first  standard parallel port address is 0x378.
 44           The second standard parallel port address is 0x278.
 45           The third  standard parallel port address is 0x3BC.
 46 
 47           You can specify a different address if you need.
 48 
 49           If you don't know what I'm talking about, load the parport module,
 50           and execute "dmesg" or "cat /proc/ioports". You can see there how
 51           many parallel ports are present and which address each one has.
 52 
 53           Usually you only need to use 0x378.
 54 
 55           If you compile this as a module, you can still override this
 56           using the module parameters.
 57 
 58 config KS0108_DELAY
 59         int "Delay between each control writing (microseconds)"
 60         depends on KS0108
 61         default "2"
 62         ---help---
 63           Amount of time the ks0108 should wait between each control write
 64           to the parallel port.
 65 
 66           If your LCD seems to miss random writings, increment this.
 67 
 68           If you don't know what I'm talking about, ignore it.
 69 
 70           If you compile this as a module, you can still override this
 71           value using the module parameters.
 72 
 73 config CFAG12864B
 74         tristate "CFAG12864B LCD"
 75         depends on X86
 76         depends on FB
 77         depends on KS0108
 78         select FB_SYS_FILLRECT
 79         select FB_SYS_COPYAREA
 80         select FB_SYS_IMAGEBLIT
 81         select FB_SYS_FOPS
 82         default n
 83         ---help---
 84           If you have a Crystalfontz 128x64 2-color LCD, cfag12864b Series,
 85           say Y. You also need the ks0108 LCD Controller driver.
 86 
 87           For help about how to wire your LCD to the parallel port,
 88           check Documentation/auxdisplay/cfag12864b
 89 
 90           Depends on the x86 arch and the framebuffer support.
 91 
 92           The LCD framebuffer driver can be attached to a console.
 93           It will work fine. However, you can't attach it to the fbdev driver
 94           of the xorg server.
 95 
 96           To compile this as a module, choose M here:
 97           the modules will be called cfag12864b and cfag12864bfb.
 98 
 99           If unsure, say N.
100 
101 config CFAG12864B_RATE
102        int "Refresh rate (hertz)"
103         depends on CFAG12864B
104         default "20"
105         ---help---
106           Refresh rate of the LCD.
107 
108           As the LCD is not memory mapped, the driver has to make the work by
109           software. This means you should be careful setting this value higher.
110           If your CPUs are really slow or you feel the system is slowed down,
111           decrease the value.
112 
113           Be careful modifying this value to a very high value:
114           You can freeze the computer, or the LCD maybe can't draw as fast as you
115           are requesting.
116 
117           If you don't know what I'm talking about, ignore it.
118 
119           If you compile this as a module, you can still override this
120           value using the module parameters.
121 
122 endif # AUXDISPLAY

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