2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
5 # Auxiliary display drivers configuration.
8 menu "Auxiliary Display support"
12 tristate "KS0108 LCD Controller"
16 If you have a LCD controlled by one or more KS0108
17 controllers, say Y. You will need also another more specific
20 Depends on Parallel Port support. If you say Y at
21 parport, you will be able to compile this as a module (M)
22 and built-in as well (Y).
24 To compile this as a module, choose M here:
25 the module will be called ks0108.
30 hex "Parallel port where the LCD is connected"
34 The address of the parallel port where the LCD is connected.
36 The first standard parallel port address is 0x378.
37 The second standard parallel port address is 0x278.
38 The third standard parallel port address is 0x3BC.
40 You can specify a different address if you need.
42 If you don't know what I'm talking about, load the parport module,
43 and execute "dmesg" or "cat /proc/ioports". You can see there how
44 many parallel ports are present and which address each one has.
46 Usually you only need to use 0x378.
48 If you compile this as a module, you can still override this
49 using the module parameters.
52 int "Delay between each control writing (microseconds)"
56 Amount of time the ks0108 should wait between each control write
59 If your driver seems to miss random writings, increment this.
61 If you don't know what I'm talking about, ignore it.
63 If you compile this as a module, you can still override this
64 value using the module parameters.
67 tristate "CFAG12864B LCD"
73 If you have a Crystalfontz 128x64 2-color LCD, cfag12864b Series,
74 say Y. You also need the ks0108 LCD Controller driver.
76 For help about how to wire your LCD to the parallel port,
77 check Documentation/auxdisplay/cfag12864b
79 Depends on the x86 arch and the framebuffer support.
81 The LCD framebuffer driver can be attached to a console.
82 It will work fine. However, you can't attach it to the fbdev driver
85 To compile this as a module, choose M here:
86 the modules will be called cfag12864b and cfag12864bfb.
90 config CFAG12864B_RATE
91 int "Refresh rate (hertz)"
95 Refresh rate of the LCD.
97 As the LCD is not memory mapped, the driver has to make the work by
98 software. This means you should be careful setting this value higher.
99 If your CPUs are really slow or you feel the system is slowed down,
102 Be careful modifying this value to a very high value:
103 You can freeze the computer, or the LCD maybe can't draw as fast as you
106 If you don't know what I'm talking about, ignore it.
108 If you compile this as a module, you can still override this
109 value using the module parameters.