1menuconfig PWM 2 bool "Pulse-Width Modulation (PWM) Support" 3 help 4 Generic Pulse-Width Modulation (PWM) support. 5 6 In Pulse-Width Modulation, a variation of the width of pulses 7 in a rectangular pulse signal is used as a means to alter the 8 average power of the signal. Applications include efficient 9 power delivery and voltage regulation. In computer systems, 10 PWMs are commonly used to control fans or the brightness of 11 display backlights. 12 13 This framework provides a generic interface to PWM devices 14 within the Linux kernel. On the driver side it provides an API 15 to register and unregister a PWM chip, an abstraction of a PWM 16 controller, that supports one or more PWM devices. Client 17 drivers can request PWM devices and use the generic framework 18 to configure as well as enable and disable them. 19 20 This generic framework replaces the legacy PWM framework which 21 allows only a single driver implementing the required API. Not 22 all legacy implementations have been ported to the framework 23 yet. The framework provides an API that is backward compatible 24 with the legacy framework so that existing client drivers 25 continue to work as expected. 26 27 If unsure, say no. 28 29if PWM 30 31config PWM_SYSFS 32 bool 33 default y if SYSFS 34 35config PWM_AB8500 36 tristate "AB8500 PWM support" 37 depends on AB8500_CORE && ARCH_U8500 38 help 39 Generic PWM framework driver for Analog Baseband AB8500. 40 41 To compile this driver as a module, choose M here: the module 42 will be called pwm-ab8500. 43 44config PWM_ATMEL 45 tristate "Atmel PWM support" 46 depends on ARCH_AT91 47 help 48 Generic PWM framework driver for Atmel SoC. 49 50 To compile this driver as a module, choose M here: the module 51 will be called pwm-atmel. 52 53config PWM_ATMEL_HLCDC_PWM 54 tristate "Atmel HLCDC PWM support" 55 depends on MFD_ATMEL_HLCDC 56 depends on HAVE_CLK 57 help 58 Generic PWM framework driver for the PWM output of the HLCDC 59 (Atmel High-end LCD Controller). This PWM output is mainly used 60 to control the LCD backlight. 61 62 To compile this driver as a module, choose M here: the module 63 will be called pwm-atmel-hlcdc. 64 65config PWM_ATMEL_TCB 66 tristate "Atmel TC Block PWM support" 67 depends on ATMEL_TCLIB && OF 68 help 69 Generic PWM framework driver for Atmel Timer Counter Block. 70 71 A Timer Counter Block provides 6 PWM devices grouped by 2. 72 Devices in a given group must have the same period. 73 74 To compile this driver as a module, choose M here: the module 75 will be called pwm-atmel-tcb. 76 77config PWM_BCM_IPROC 78 tristate "iProc PWM support" 79 depends on ARCH_BCM_IPROC || COMPILE_TEST 80 depends on COMMON_CLK 81 default ARCH_BCM_IPROC 82 help 83 Generic PWM framework driver for Broadcom iProc PWM block. This 84 block is used in Broadcom iProc SoC's. 85 86 To compile this driver as a module, choose M here: the module 87 will be called pwm-bcm-iproc. 88 89config PWM_BCM_KONA 90 tristate "Kona PWM support" 91 depends on ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS || COMPILE_TEST 92 depends on HAVE_CLK && HAS_IOMEM 93 default ARCH_BCM_MOBILE || ARCH_BCM_CYGNUS 94 help 95 Generic PWM framework driver for Broadcom Kona PWM block. 96 97 To compile this driver as a module, choose M here: the module 98 will be called pwm-bcm-kona. 99 100config PWM_BCM2835 101 tristate "BCM2835 PWM support" 102 depends on ARCH_BCM2835 103 help 104 PWM framework driver for BCM2835 controller (Raspberry Pi) 105 106 To compile this driver as a module, choose M here: the module 107 will be called pwm-bcm2835. 108 109config PWM_BERLIN 110 tristate "Marvell Berlin PWM support" 111 depends on ARCH_BERLIN 112 help 113 PWM framework driver for Marvell Berlin SoCs. 114 115 To compile this driver as a module, choose M here: the module 116 will be called pwm-berlin. 117 118config PWM_BRCMSTB 119 tristate "Broadcom STB PWM support" 120 depends on ARCH_BRCMSTB || BMIPS_GENERIC 121 help 122 Generic PWM framework driver for the Broadcom Set-top-Box 123 SoCs (BCM7xxx). 124 125 To compile this driver as a module, choose M Here: the module 126 will be called pwm-brcmstb.c. 127 128config PWM_CLPS711X 129 tristate "CLPS711X PWM support" 130 depends on ARCH_CLPS711X || COMPILE_TEST 131 depends on HAS_IOMEM 132 help 133 Generic PWM framework driver for Cirrus Logic CLPS711X. 134 135 To compile this driver as a module, choose M here: the module 136 will be called pwm-clps711x. 137 138config PWM_CRC 139 bool "Intel Crystalcove (CRC) PWM support" 140 depends on X86 && INTEL_SOC_PMIC 141 help 142 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM 143 control. 144 145config PWM_CROS_EC 146 tristate "ChromeOS EC PWM driver" 147 depends on MFD_CROS_EC 148 help 149 PWM driver for exposing a PWM attached to the ChromeOS Embedded 150 Controller. 151 152config PWM_EP93XX 153 tristate "Cirrus Logic EP93xx PWM support" 154 depends on ARCH_EP93XX 155 help 156 Generic PWM framework driver for Cirrus Logic EP93xx. 157 158 To compile this driver as a module, choose M here: the module 159 will be called pwm-ep93xx. 160 161config PWM_FSL_FTM 162 tristate "Freescale FlexTimer Module (FTM) PWM support" 163 depends on HAS_IOMEM 164 depends on OF 165 select REGMAP_MMIO 166 help 167 Generic FTM PWM framework driver for Freescale VF610 and 168 Layerscape LS-1 SoCs. 169 170 To compile this driver as a module, choose M here: the module 171 will be called pwm-fsl-ftm. 172 173config PWM_HIBVT 174 tristate "HiSilicon BVT PWM support" 175 depends on ARCH_HISI || COMPILE_TEST 176 help 177 Generic PWM framework driver for HiSilicon BVT SoCs. 178 179 To compile this driver as a module, choose M here: the module 180 will be called pwm-hibvt. 181 182config PWM_IMG 183 tristate "Imagination Technologies PWM driver" 184 depends on HAS_IOMEM 185 depends on MFD_SYSCON 186 depends on COMMON_CLK 187 depends on MIPS || COMPILE_TEST 188 help 189 Generic PWM framework driver for Imagination Technologies 190 PWM block which supports 4 channels. 191 192 To compile this driver as a module, choose M here: the module 193 will be called pwm-img 194 195config PWM_IMX1 196 tristate "i.MX1 PWM support" 197 depends on ARCH_MXC 198 help 199 Generic PWM framework driver for i.MX1 and i.MX21 200 201 To compile this driver as a module, choose M here: the module 202 will be called pwm-imx1. 203 204config PWM_IMX27 205 tristate "i.MX27 PWM support" 206 depends on ARCH_MXC 207 help 208 Generic PWM framework driver for i.MX27 and later i.MX SoCs. 209 210 To compile this driver as a module, choose M here: the module 211 will be called pwm-imx27. 212 213config PWM_JZ4740 214 tristate "Ingenic JZ47xx PWM support" 215 depends on MACH_INGENIC 216 help 217 Generic PWM framework driver for Ingenic JZ47xx based 218 machines. 219 220 To compile this driver as a module, choose M here: the module 221 will be called pwm-jz4740. 222 223config PWM_LP3943 224 tristate "TI/National Semiconductor LP3943 PWM support" 225 depends on MFD_LP3943 226 help 227 Generic PWM framework driver for LP3943 which supports two PWM 228 channels. 229 230 To compile this driver as a module, choose M here: the module 231 will be called pwm-lp3943. 232 233config PWM_LPC18XX_SCT 234 tristate "LPC18xx/43xx PWM/SCT support" 235 depends on ARCH_LPC18XX 236 help 237 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 238 supports 16 channels. 239 A maximum of 15 channels can be requested simultaneously and 240 must have the same period. 241 242 To compile this driver as a module, choose M here: the module 243 will be called pwm-lpc18xx-sct. 244 245config PWM_LPC32XX 246 tristate "LPC32XX PWM support" 247 depends on ARCH_LPC32XX 248 help 249 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 250 PWM controllers. 251 252 To compile this driver as a module, choose M here: the module 253 will be called pwm-lpc32xx. 254 255config PWM_LPSS 256 tristate 257 258config PWM_LPSS_PCI 259 tristate "Intel LPSS PWM PCI driver" 260 depends on X86 && PCI 261 select PWM_LPSS 262 help 263 The PCI driver for Intel Low Power Subsystem PWM controller. 264 265 To compile this driver as a module, choose M here: the module 266 will be called pwm-lpss-pci. 267 268config PWM_LPSS_PLATFORM 269 tristate "Intel LPSS PWM platform driver" 270 depends on X86 && ACPI 271 select PWM_LPSS 272 help 273 The platform driver for Intel Low Power Subsystem PWM controller. 274 275 To compile this driver as a module, choose M here: the module 276 will be called pwm-lpss-platform. 277 278config PWM_MESON 279 tristate "Amlogic Meson PWM driver" 280 depends on ARCH_MESON 281 help 282 The platform driver for Amlogic Meson PWM controller. 283 284 To compile this driver as a module, choose M here: the module 285 will be called pwm-meson. 286 287config PWM_MTK_DISP 288 tristate "MediaTek display PWM driver" 289 depends on ARCH_MEDIATEK || COMPILE_TEST 290 depends on HAS_IOMEM 291 help 292 Generic PWM framework driver for MediaTek disp-pwm device. 293 The PWM is used to control the backlight brightness for display. 294 295 To compile this driver as a module, choose M here: the module 296 will be called pwm-mtk-disp. 297 298config PWM_MEDIATEK 299 tristate "MediaTek PWM support" 300 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST 301 help 302 Generic PWM framework driver for Mediatek ARM SoC. 303 304 To compile this driver as a module, choose M here: the module 305 will be called pwm-mediatek. 306 307config PWM_MXS 308 tristate "Freescale MXS PWM support" 309 depends on ARCH_MXS && OF 310 select STMP_DEVICE 311 help 312 Generic PWM framework driver for Freescale MXS. 313 314 To compile this driver as a module, choose M here: the module 315 will be called pwm-mxs. 316 317config PWM_OMAP_DMTIMER 318 tristate "OMAP Dual-Mode Timer PWM support" 319 depends on OF && ARCH_OMAP && OMAP_DM_TIMER 320 help 321 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 322 323 To compile this driver as a module, choose M here: the module 324 will be called pwm-omap-dmtimer 325 326config PWM_PCA9685 327 tristate "NXP PCA9685 PWM driver" 328 depends on I2C 329 select REGMAP_I2C 330 help 331 Generic PWM framework driver for NXP PCA9685 LED controller. 332 333 To compile this driver as a module, choose M here: the module 334 will be called pwm-pca9685. 335 336config PWM_PUV3 337 tristate "PKUnity NetBook-0916 PWM support" 338 depends on ARCH_PUV3 339 help 340 Generic PWM framework driver for PKUnity NetBook-0916. 341 342 To compile this driver as a module, choose M here: the module 343 will be called pwm-puv3. 344 345config PWM_PXA 346 tristate "PXA PWM support" 347 depends on ARCH_PXA 348 help 349 Generic PWM framework driver for PXA. 350 351 To compile this driver as a module, choose M here: the module 352 will be called pwm-pxa. 353 354config PWM_RCAR 355 tristate "Renesas R-Car PWM support" 356 depends on ARCH_RENESAS || COMPILE_TEST 357 depends on HAS_IOMEM 358 help 359 This driver exposes the PWM Timer controller found in Renesas 360 R-Car chips through the PWM API. 361 362 To compile this driver as a module, choose M here: the module 363 will be called pwm-rcar. 364 365config PWM_RENESAS_TPU 366 tristate "Renesas TPU PWM support" 367 depends on ARCH_RENESAS || COMPILE_TEST 368 depends on HAS_IOMEM 369 help 370 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 371 in Renesas chips through the PWM API. 372 373 To compile this driver as a module, choose M here: the module 374 will be called pwm-renesas-tpu. 375 376config PWM_ROCKCHIP 377 tristate "Rockchip PWM support" 378 depends on ARCH_ROCKCHIP 379 help 380 Generic PWM framework driver for the PWM controller found on 381 Rockchip SoCs. 382 383config PWM_SAMSUNG 384 tristate "Samsung PWM support" 385 depends on PLAT_SAMSUNG || ARCH_EXYNOS 386 help 387 Generic PWM framework driver for Samsung. 388 389 To compile this driver as a module, choose M here: the module 390 will be called pwm-samsung. 391 392config PWM_SPEAR 393 tristate "STMicroelectronics SPEAr PWM support" 394 depends on PLAT_SPEAR 395 depends on OF 396 help 397 Generic PWM framework driver for the PWM controller on ST 398 SPEAr SoCs. 399 400 To compile this driver as a module, choose M here: the module 401 will be called pwm-spear. 402 403config PWM_STI 404 tristate "STiH4xx PWM support" 405 depends on ARCH_STI 406 depends on OF 407 help 408 Generic PWM framework driver for STiH4xx SoCs. 409 410 To compile this driver as a module, choose M here: the module 411 will be called pwm-sti. 412 413config PWM_STM32 414 tristate "STMicroelectronics STM32 PWM" 415 depends on MFD_STM32_TIMERS 416 help 417 Generic PWM framework driver for STM32 SoCs. 418 419 To compile this driver as a module, choose M here: the module 420 will be called pwm-stm32. 421 422config PWM_STM32_LP 423 tristate "STMicroelectronics STM32 PWM LP" 424 depends on MFD_STM32_LPTIMER || COMPILE_TEST 425 help 426 Generic PWM framework driver for STMicroelectronics STM32 SoCs 427 with Low-Power Timer (LPTIM). 428 429 To compile this driver as a module, choose M here: the module 430 will be called pwm-stm32-lp. 431 432config PWM_STMPE 433 bool "STMPE expander PWM export" 434 depends on MFD_STMPE 435 help 436 This enables support for the PWMs found in the STMPE I/O 437 expanders. 438 439config PWM_SUN4I 440 tristate "Allwinner PWM support" 441 depends on ARCH_SUNXI || COMPILE_TEST 442 depends on HAS_IOMEM && COMMON_CLK 443 help 444 Generic PWM framework driver for Allwinner SoCs. 445 446 To compile this driver as a module, choose M here: the module 447 will be called pwm-sun4i. 448 449config PWM_TEGRA 450 tristate "NVIDIA Tegra PWM support" 451 depends on ARCH_TEGRA 452 help 453 Generic PWM framework driver for the PWFM controller found on NVIDIA 454 Tegra SoCs. 455 456 To compile this driver as a module, choose M here: the module 457 will be called pwm-tegra. 458 459config PWM_TIECAP 460 tristate "ECAP PWM support" 461 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 462 help 463 PWM driver support for the ECAP APWM controller found on TI SOCs 464 465 To compile this driver as a module, choose M here: the module 466 will be called pwm-tiecap. 467 468config PWM_TIEHRPWM 469 tristate "EHRPWM PWM support" 470 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 471 help 472 PWM driver support for the EHRPWM controller found on AM33XX 473 TI SOC 474 475 To compile this driver as a module, choose M here: the module 476 will be called pwm-tiehrpwm. 477 478config PWM_TIPWMSS 479 bool 480 default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM) 481 help 482 PWM Subsystem driver support for AM33xx SOC. 483 484 PWM submodules require PWM config space access from submodule 485 drivers and require common parent driver support. 486 487config PWM_TWL 488 tristate "TWL4030/6030 PWM support" 489 depends on TWL4030_CORE 490 help 491 Generic PWM framework driver for TWL4030/6030. 492 493 To compile this driver as a module, choose M here: the module 494 will be called pwm-twl. 495 496config PWM_TWL_LED 497 tristate "TWL4030/6030 PWM support for LED drivers" 498 depends on TWL4030_CORE 499 help 500 Generic PWM framework driver for TWL4030/6030 LED terminals. 501 502 To compile this driver as a module, choose M here: the module 503 will be called pwm-twl-led. 504 505config PWM_VT8500 506 tristate "vt8500 PWM support" 507 depends on ARCH_VT8500 508 help 509 Generic PWM framework driver for vt8500. 510 511 To compile this driver as a module, choose M here: the module 512 will be called pwm-vt8500. 513 514config PWM_ZX 515 tristate "ZTE ZX PWM support" 516 depends on ARCH_ZX 517 help 518 Generic PWM framework driver for ZTE ZX family SoCs. 519 520 To compile this driver as a module, choose M here: the module 521 will be called pwm-zx. 522 523endif 524