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1# SPDX-License-Identifier: GPL-2.02#3# For a description of the syntax of this configuration file,4# see Documentation/kbuild/kconfig-language.rst.5#6# Auxiliary display drivers configuration.7#8 9menuconfig AUXDISPLAY10 bool "Auxiliary Display support"11 help12 Say Y here to get to see options for auxiliary display drivers.13 This option alone does not add any kernel code.14 15 If you say N, all options in this submenu will be skipped and disabled.16 17if AUXDISPLAY18 19#20# Character LCD section21#22config CHARLCD23 tristate "Character LCD core support" if COMPILE_TEST24 help25 This is the base system for character-based LCD displays.26 It makes no sense to have this alone, you select your display driver27 and if it needs the charlcd core, it will select it automatically.28 This is some character LCD core interface that multiple drivers can29 use.30 31config HD44780_COMMON32 tristate "Common functions for HD44780 (and compatibles) LCD displays" if COMPILE_TEST33 select CHARLCD34 help35 This is a module with the common symbols for HD44780 (and compatibles)36 displays. This is the code that multiple other modules use. It is not37 useful alone. If you have some sort of HD44780 compatible display,38 you very likely use this. It is selected automatically by selecting39 your concrete display.40 41config HD4478042 tristate "HD44780 Character LCD support"43 depends on GPIOLIB || COMPILE_TEST44 select HD44780_COMMON45 help46 Enable support for Character LCDs using a HD44780 controller.47 The LCD is accessible through the /dev/lcd char device (10, 156).48 This code can either be compiled as a module, or linked into the49 kernel and started at boot.50 If you don't understand what all this is about, say N.51 52config LCD2S53 tristate "lcd2s 20x4 character display over I2C console"54 depends on I2C55 select CHARLCD56 help57 This is a driver that lets you use the lcd2s 20x4 character display58 from Modtronix engineering as a console output device. The display59 is a simple single color character display. You have to connect it60 to an I2C bus.61 62menuconfig PARPORT_PANEL63 tristate "Parallel port LCD/Keypad Panel support"64 depends on PARPORT65 select HD44780_COMMON66 help67 Say Y here if you have an HD44780 or KS-0074 LCD connected to your68 parallel port. This driver also features 4 and 6-key keypads. The LCD69 is accessible through the /dev/lcd char device (10, 156), and the70 keypad through /dev/keypad (10, 185). This code can either be71 compiled as a module, or linked into the kernel and started at boot.72 If you don't understand what all this is about, say N.73 74if PARPORT_PANEL75 76config PANEL_PARPORT77 int "Default parallel port number (0=LPT1)"78 range 0 25579 default "0"80 help81 This is the index of the parallel port the panel is connected to. One82 driver instance only supports one parallel port, so if your keypad83 and LCD are connected to two separate ports, you have to start two84 modules with different arguments. Numbering starts with '0' for LPT1,85 and so on.86 87config PANEL_PROFILE88 int "Default panel profile (0-5, 0=custom)"89 range 0 590 default "5"91 help92 To ease configuration, the driver supports different configuration93 profiles for past and recent wirings. These profiles can also be94 used to define an approximative configuration, completed by a few95 other options. Here are the profiles :96 97 0 = custom (see further)98 1 = 2x16 parallel LCD, old keypad99 2 = 2x16 serial LCD (KS-0074), new keypad100 3 = 2x16 parallel LCD (Hantronix), no keypad101 4 = 2x16 parallel LCD (Nexcom NSA1045) with Nexcom's keypad102 5 = 2x40 parallel LCD (old one), with old keypad103 104 Custom configurations allow you to define how your display is105 wired to the parallel port, and how it works. This is only intended106 for experts.107 108config PANEL_KEYPAD109 depends on PANEL_PROFILE="0"110 int "Keypad type (0=none, 1=old 6 keys, 2=new 6 keys, 3=Nexcom 4 keys)"111 range 0 3112 default 0113 help114 This enables and configures a keypad connected to the parallel port.115 The keys will be read from character device 10,185. Valid values are :116 117 0 : do not enable this driver118 1 : old 6 keys keypad119 2 : new 6 keys keypad, as used on the server at www.ant-computing.com120 3 : Nexcom NSA1045's 4 keys keypad121 122 New profiles can be described in the driver source. The driver also123 supports simultaneous keys pressed when the keypad supports them.124 125config PANEL_LCD126 depends on PANEL_PROFILE="0"127 int "LCD type (0=none, 1=custom, 2=old //, 3=ks0074, 4=hantronix, 5=Nexcom)"128 range 0 5129 default 0130 help131 This enables and configures an LCD connected to the parallel port.132 The driver includes an interpreter for escape codes starting with133 '\e[L' which are specific to the LCD, and a few ANSI codes. The134 driver will be registered as character device 10,156, usually135 under the name '/dev/lcd'. There are a total of 6 supported types :136 137 0 : do not enable the driver138 1 : custom configuration and wiring (see further)139 2 : 2x16 & 2x40 parallel LCD (old wiring)140 3 : 2x16 serial LCD (KS-0074 based)141 4 : 2x16 parallel LCD (Hantronix wiring)142 5 : 2x16 parallel LCD (Nexcom wiring)143 144 When type '1' is specified, other options will appear to configure145 more precise aspects (wiring, dimensions, protocol, ...). Please note146 that those values changed from the 2.4 driver for better consistency.147 148config PANEL_LCD_HEIGHT149 depends on PANEL_PROFILE="0" && PANEL_LCD="1"150 int "Number of lines on the LCD (1-2)"151 range 1 2152 default 2153 help154 This is the number of visible character lines on the LCD in custom profile.155 It can either be 1 or 2.156 157config PANEL_LCD_WIDTH158 depends on PANEL_PROFILE="0" && PANEL_LCD="1"159 int "Number of characters per line on the LCD (1-40)"160 range 1 40161 default 40162 help163 This is the number of characters per line on the LCD in custom profile.164 Common values are 16,20,24,40.165 166config PANEL_LCD_BWIDTH167 depends on PANEL_PROFILE="0" && PANEL_LCD="1"168 int "Internal LCD line width (1-40, 40 by default)"169 range 1 40170 default 40171 help172 Most LCDs use a standard controller which supports hardware lines of 40173 characters, although sometimes only 16, 20 or 24 of them are really wired174 to the terminal. This results in some non-visible but addressable characters,175 and is the case for most parallel LCDs. Other LCDs, and some serial ones,176 however, use the same line width internally as what is visible. The KS0074177 for example, uses 16 characters per line for 16 visible characters per line.178 179 This option lets you configure the value used by your LCD in 'custom' profile.180 If you don't know, put '40' here.181 182config PANEL_LCD_HWIDTH183 depends on PANEL_PROFILE="0" && PANEL_LCD="1"184 int "Hardware LCD line width (1-64, 64 by default)"185 range 1 64186 default 64187 help188 Most LCDs use a single address bit to differentiate line 0 and line 1. Since189 some of them need to be able to address 40 chars with the lower bits, they190 often use the immediately superior power of 2, which is 64, to address the191 next line.192 193 If you don't know what your LCD uses, in doubt let 16 here for a 2x16, and194 64 here for a 2x40.195 196config PANEL_LCD_CHARSET197 depends on PANEL_PROFILE="0" && PANEL_LCD="1"198 int "LCD character set (0=normal, 1=KS0074)"199 range 0 1200 default 0201 help202 Some controllers such as the KS0074 use a somewhat strange character set203 where many symbols are at unusual places. The driver knows how to map204 'standard' ASCII characters to the character sets used by these controllers.205 Valid values are :206 207 0 : normal (untranslated) character set208 1 : KS0074 character set209 210 If you don't know, use the normal one (0).211 212config PANEL_LCD_PROTO213 depends on PANEL_PROFILE="0" && PANEL_LCD="1"214 int "LCD communication mode (0=parallel 8 bits, 1=serial)"215 range 0 1216 default 0217 help218 This driver now supports any serial or parallel LCD wired to a parallel219 port. But before assigning signals, the driver needs to know if it will220 be driving a serial LCD or a parallel one. Serial LCDs only use 2 wires221 (SDA/SCL), while parallel ones use 2 or 3 wires for the control signals222 (E, RS, sometimes RW), and 4 or 8 for the data. Use 0 here for a 8 bits223 parallel LCD, and 1 for a serial LCD.224 225config PANEL_LCD_PIN_E226 depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"227 int "Parallel port pin number & polarity connected to the LCD E signal (-17...17) "228 range -17 17229 default 14230 help231 This describes the number of the parallel port pin to which the LCD 'E'232 signal has been connected. It can be :233 234 0 : no connection (eg: connected to ground)235 1..17 : directly connected to any of these pins on the DB25 plug236 -1..-17 : connected to the same pin through an inverter (eg: transistor).237 238 Default for the 'E' pin in custom profile is '14' (AUTOFEED).239 240config PANEL_LCD_PIN_RS241 depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"242 int "Parallel port pin number & polarity connected to the LCD RS signal (-17...17) "243 range -17 17244 default 17245 help246 This describes the number of the parallel port pin to which the LCD 'RS'247 signal has been connected. It can be :248 249 0 : no connection (eg: connected to ground)250 1..17 : directly connected to any of these pins on the DB25 plug251 -1..-17 : connected to the same pin through an inverter (eg: transistor).252 253 Default for the 'RS' pin in custom profile is '17' (SELECT IN).254 255config PANEL_LCD_PIN_RW256 depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"257 int "Parallel port pin number & polarity connected to the LCD RW signal (-17...17) "258 range -17 17259 default 16260 help261 This describes the number of the parallel port pin to which the LCD 'RW'262 signal has been connected. It can be :263 264 0 : no connection (eg: connected to ground)265 1..17 : directly connected to any of these pins on the DB25 plug266 -1..-17 : connected to the same pin through an inverter (eg: transistor).267 268 Default for the 'RW' pin in custom profile is '16' (INIT).269 270config PANEL_LCD_PIN_SCL271 depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0"272 int "Parallel port pin number & polarity connected to the LCD SCL signal (-17...17) "273 range -17 17274 default 1275 help276 This describes the number of the parallel port pin to which the serial277 LCD 'SCL' signal has been connected. It can be :278 279 0 : no connection (eg: connected to ground)280 1..17 : directly connected to any of these pins on the DB25 plug281 -1..-17 : connected to the same pin through an inverter (eg: transistor).282 283 Default for the 'SCL' pin in custom profile is '1' (STROBE).284 285config PANEL_LCD_PIN_SDA286 depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0"287 int "Parallel port pin number & polarity connected to the LCD SDA signal (-17...17) "288 range -17 17289 default 2290 help291 This describes the number of the parallel port pin to which the serial292 LCD 'SDA' signal has been connected. It can be :293 294 0 : no connection (eg: connected to ground)295 1..17 : directly connected to any of these pins on the DB25 plug296 -1..-17 : connected to the same pin through an inverter (eg: transistor).297 298 Default for the 'SDA' pin in custom profile is '2' (D0).299 300config PANEL_LCD_PIN_BL301 depends on PANEL_PROFILE="0" && PANEL_LCD="1"302 int "Parallel port pin number & polarity connected to the LCD backlight signal (-17...17) "303 range -17 17304 default 0305 help306 This describes the number of the parallel port pin to which the LCD 'BL' signal307 has been connected. It can be :308 309 0 : no connection (eg: connected to ground)310 1..17 : directly connected to any of these pins on the DB25 plug311 -1..-17 : connected to the same pin through an inverter (eg: transistor).312 313 Default for the 'BL' pin in custom profile is '0' (uncontrolled).314 315endif # PARPORT_PANEL316 317config PANEL_CHANGE_MESSAGE318 bool "Change LCD initialization message ?"319 depends on CHARLCD || LINEDISP320 help321 This allows you to replace the boot message indicating the kernel version322 and the driver version with a custom message. This is useful on appliances323 where a simple 'Starting system' message can be enough to stop a customer324 from worrying.325 326 If you say 'Y' here, you'll be able to choose a message yourself. Otherwise,327 say 'N' and keep the default message with the version.328 329config PANEL_BOOT_MESSAGE330 depends on PANEL_CHANGE_MESSAGE="y"331 string "New initialization message"332 default ""333 help334 This allows you to replace the boot message indicating the kernel version335 and the driver version with a custom message. This is useful on appliances336 where a simple 'Starting system' message can be enough to stop a customer337 from worrying.338 339 An empty message will only clear the display at driver init time. Any other340 printf()-formatted message is valid with newline and escape codes.341 342choice343 prompt "Backlight initial state"344 default CHARLCD_BL_FLASH345 help346 Select the initial backlight state on boot or module load.347 348 Previously, there was no option for this: the backlight flashed349 briefly on init. Now you can also turn it off/on.350 351 config CHARLCD_BL_OFF352 bool "Off"353 help354 Backlight is initially turned off355 356 config CHARLCD_BL_ON357 bool "On"358 help359 Backlight is initially turned on360 361 config CHARLCD_BL_FLASH362 bool "Flash"363 help364 Backlight is flashed briefly on init365 366endchoice367 368#369# Samsung KS0108 LCD controller section370#371config KS0108372 tristate "KS0108 LCD Controller"373 depends on PARPORT_PC374 help375 If you have a LCD controlled by one or more KS0108376 controllers, say Y. You will need also another more specific377 driver for your LCD.378 379 Depends on Parallel Port support. If you say Y at380 parport, you will be able to compile this as a module (M)381 and built-in as well (Y).382 383 To compile this as a module, choose M here:384 the module will be called ks0108.385 386 If unsure, say N.387 388config KS0108_PORT389 hex "Parallel port where the LCD is connected"390 depends on KS0108391 default 0x378392 help393 The address of the parallel port where the LCD is connected.394 395 The first standard parallel port address is 0x378.396 The second standard parallel port address is 0x278.397 The third standard parallel port address is 0x3BC.398 399 You can specify a different address if you need.400 401 If you don't know what I'm talking about, load the parport module,402 and execute "dmesg" or "cat /proc/ioports". You can see there how403 many parallel ports are present and which address each one has.404 405 Usually you only need to use 0x378.406 407 If you compile this as a module, you can still override this408 using the module parameters.409 410config KS0108_DELAY411 int "Delay between each control writing (microseconds)"412 depends on KS0108413 default "2"414 help415 Amount of time the ks0108 should wait between each control write416 to the parallel port.417 418 If your LCD seems to miss random writings, increment this.419 420 If you don't know what I'm talking about, ignore it.421 422 If you compile this as a module, you can still override this423 value using the module parameters.424 425config CFAG12864B426 tristate "CFAG12864B LCD"427 depends on X86428 depends on FB429 depends on KS0108430 select FB_SYSMEM_HELPERS431 help432 If you have a Crystalfontz 128x64 2-color LCD, cfag12864b Series,433 say Y. You also need the ks0108 LCD Controller driver.434 435 For help about how to wire your LCD to the parallel port,436 check Documentation/admin-guide/auxdisplay/cfag12864b.rst437 438 Depends on the x86 arch and the framebuffer support.439 440 The LCD framebuffer driver can be attached to a console.441 It will work fine. However, you can't attach it to the fbdev driver442 of the xorg server.443 444 To compile this as a module, choose M here:445 the modules will be called cfag12864b and cfag12864bfb.446 447 If unsure, say N.448 449config CFAG12864B_RATE450 int "Refresh rate (hertz)"451 depends on CFAG12864B452 default "20"453 help454 Refresh rate of the LCD.455 456 As the LCD is not memory mapped, the driver has to make the work by457 software. This means you should be careful setting this value higher.458 If your CPUs are really slow or you feel the system is slowed down,459 decrease the value.460 461 Be careful modifying this value to a very high value:462 You can freeze the computer, or the LCD maybe can't draw as fast as you463 are requesting.464 465 If you don't know what I'm talking about, ignore it.466 467 If you compile this as a module, you can still override this468 value using the module parameters.469 470#471# Single character line display section472#473config LINEDISP474 tristate "Character line display core support" if COMPILE_TEST475 help476 This is the core support for single-line character displays, to be477 selected by drivers that use it.478 479config IMG_ASCII_LCD480 tristate "Imagination Technologies ASCII LCD Display"481 depends on HAS_IOMEM482 default y if MIPS_MALTA483 select MFD_SYSCON484 select LINEDISP485 help486 Enable this to support the simple ASCII LCD displays found on487 development boards such as the MIPS Boston, MIPS Malta & MIPS SEAD3488 from Imagination Technologies.489 490config HT16K33491 tristate "Holtek Ht16K33 LED controller with keyscan"492 depends on FB && I2C && INPUT493 select FB_SYSMEM_HELPERS494 select INPUT_MATRIXKMAP495 select FB_BACKLIGHT496 select NEW_LEDS497 select LEDS_CLASS498 select LINEDISP499 help500 Say yes here to add support for Holtek HT16K33, RAM mapping 16*8501 LED controller driver with keyscan.502 503config MAX6959504 tristate "Maxim MAX6958/6959 7-segment LED controller"505 depends on I2C506 select REGMAP_I2C507 select LINEDISP508 help509 If you say yes here you get support for the following Maxim chips510 (I2C 7-segment LED display controller):511 - MAX6958512 - MAX6959 (input support)513 514 This driver can also be built as a module. If so, the module515 will be called max6959.516 517config SEG_LED_GPIO518 tristate "Generic 7-segment LED display"519 depends on GPIOLIB || COMPILE_TEST520 select LINEDISP521 help522 This driver supports a generic 7-segment LED display made up523 of GPIO pins connected to the individual segments.524 525 This driver can also be built as a module. If so, the module526 will be called seg-led-gpio.527 528#529# Character LCD with non-conforming interface section530#531config ARM_CHARLCD532 bool "ARM Ltd. Character LCD Driver"533 depends on PLAT_VERSATILE534 help535 This is a driver for the character LCD found on the ARM Ltd.536 Versatile and RealView Platform Baseboards. It doesn't do537 very much more than display the text "ARM Linux" on the first538 line and the Linux version on the second line, but that's539 still useful.540 541endif # AUXDISPLAY542 543#544# Deprecated options545#546config PANEL547 tristate "Parallel port LCD/Keypad Panel support (OLD OPTION)"548 depends on PARPORT549 select AUXDISPLAY550 select PARPORT_PANEL551