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 || AVR32 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 92 help 93 Generic PWM framework driver for Broadcom Kona PWM block. 94 95 To compile this driver as a module, choose M here: the module 96 will be called pwm-bcm-kona. 97 98config PWM_BCM2835 99 tristate "BCM2835 PWM support" 100 depends on ARCH_BCM2835 101 help 102 PWM framework driver for BCM2835 controller (Raspberry Pi) 103 104 To compile this driver as a module, choose M here: the module 105 will be called pwm-bcm2835. 106 107config PWM_BERLIN 108 tristate "Marvell Berlin PWM support" 109 depends on ARCH_BERLIN 110 help 111 PWM framework driver for Marvell Berlin SoCs. 112 113 To compile this driver as a module, choose M here: the module 114 will be called pwm-berlin. 115 116config PWM_BFIN 117 tristate "Blackfin PWM support" 118 depends on BFIN_GPTIMERS 119 help 120 Generic PWM framework driver for Blackfin. 121 122 To compile this driver as a module, choose M here: the module 123 will be called pwm-bfin. 124 125config PWM_BRCMSTB 126 tristate "Broadcom STB PWM support" 127 depends on ARCH_BRCMSTB || BMIPS_GENERIC 128 help 129 Generic PWM framework driver for the Broadcom Set-top-Box 130 SoCs (BCM7xxx). 131 132 To compile this driver as a module, choose M Here: the module 133 will be called pwm-brcmstb.c. 134 135config PWM_CLPS711X 136 tristate "CLPS711X PWM support" 137 depends on ARCH_CLPS711X || COMPILE_TEST 138 depends on HAS_IOMEM 139 help 140 Generic PWM framework driver for Cirrus Logic CLPS711X. 141 142 To compile this driver as a module, choose M here: the module 143 will be called pwm-clps711x. 144 145config PWM_CRC 146 bool "Intel Crystalcove (CRC) PWM support" 147 depends on X86 && INTEL_SOC_PMIC 148 help 149 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM 150 control. 151 152config PWM_CROS_EC 153 tristate "ChromeOS EC PWM driver" 154 depends on MFD_CROS_EC 155 help 156 PWM driver for exposing a PWM attached to the ChromeOS Embedded 157 Controller. 158 159config PWM_EP93XX 160 tristate "Cirrus Logic EP93xx PWM support" 161 depends on ARCH_EP93XX 162 help 163 Generic PWM framework driver for Cirrus Logic EP93xx. 164 165 To compile this driver as a module, choose M here: the module 166 will be called pwm-ep93xx. 167 168config PWM_FSL_FTM 169 tristate "Freescale FlexTimer Module (FTM) PWM support" 170 depends on HAS_IOMEM 171 depends on OF 172 select REGMAP_MMIO 173 help 174 Generic FTM PWM framework driver for Freescale VF610 and 175 Layerscape LS-1 SoCs. 176 177 To compile this driver as a module, choose M here: the module 178 will be called pwm-fsl-ftm. 179 180config PWM_HIBVT 181 tristate "HiSilicon BVT PWM support" 182 depends on ARCH_HISI || COMPILE_TEST 183 help 184 Generic PWM framework driver for HiSilicon BVT SoCs. 185 186 To compile this driver as a module, choose M here: the module 187 will be called pwm-hibvt. 188 189config PWM_IMG 190 tristate "Imagination Technologies PWM driver" 191 depends on HAS_IOMEM 192 depends on MFD_SYSCON 193 depends on COMMON_CLK 194 depends on MIPS || COMPILE_TEST 195 help 196 Generic PWM framework driver for Imagination Technologies 197 PWM block which supports 4 channels. 198 199 To compile this driver as a module, choose M here: the module 200 will be called pwm-img 201 202config PWM_IMX 203 tristate "i.MX PWM support" 204 depends on ARCH_MXC 205 help 206 Generic PWM framework driver for i.MX. 207 208 To compile this driver as a module, choose M here: the module 209 will be called pwm-imx. 210 211config PWM_JZ4740 212 tristate "Ingenic JZ4740 PWM support" 213 depends on MACH_JZ4740 214 help 215 Generic PWM framework driver for Ingenic JZ4740 based 216 machines. 217 218 To compile this driver as a module, choose M here: the module 219 will be called pwm-jz4740. 220 221config PWM_LP3943 222 tristate "TI/National Semiconductor LP3943 PWM support" 223 depends on MFD_LP3943 224 help 225 Generic PWM framework driver for LP3943 which supports two PWM 226 channels. 227 228 To compile this driver as a module, choose M here: the module 229 will be called pwm-lp3943. 230 231config PWM_LPC18XX_SCT 232 tristate "LPC18xx/43xx PWM/SCT support" 233 depends on ARCH_LPC18XX 234 help 235 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 236 supports 16 channels. 237 A maximum of 15 channels can be requested simultaneously and 238 must have the same period. 239 240 To compile this driver as a module, choose M here: the module 241 will be called pwm-lpc18xx-sct. 242 243config PWM_LPC32XX 244 tristate "LPC32XX PWM support" 245 depends on ARCH_LPC32XX 246 help 247 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 248 PWM controllers. 249 250 To compile this driver as a module, choose M here: the module 251 will be called pwm-lpc32xx. 252 253config PWM_LPSS 254 tristate 255 256config PWM_LPSS_PCI 257 tristate "Intel LPSS PWM PCI driver" 258 depends on X86 && PCI 259 select PWM_LPSS 260 help 261 The PCI driver for Intel Low Power Subsystem PWM controller. 262 263 To compile this driver as a module, choose M here: the module 264 will be called pwm-lpss-pci. 265 266config PWM_LPSS_PLATFORM 267 tristate "Intel LPSS PWM platform driver" 268 depends on X86 && ACPI 269 select PWM_LPSS 270 help 271 The platform driver for Intel Low Power Subsystem PWM controller. 272 273 To compile this driver as a module, choose M here: the module 274 will be called pwm-lpss-platform. 275 276config PWM_MESON 277 tristate "Amlogic Meson PWM driver" 278 depends on ARCH_MESON 279 help 280 The platform driver for Amlogic Meson PWM controller. 281 282 To compile this driver as a module, choose M here: the module 283 will be called pwm-meson. 284 285config PWM_MTK_DISP 286 tristate "MediaTek display PWM driver" 287 depends on ARCH_MEDIATEK || COMPILE_TEST 288 depends on HAS_IOMEM 289 help 290 Generic PWM framework driver for MediaTek disp-pwm device. 291 The PWM is used to control the backlight brightness for display. 292 293 To compile this driver as a module, choose M here: the module 294 will be called pwm-mtk-disp. 295 296config PWM_MXS 297 tristate "Freescale MXS PWM support" 298 depends on ARCH_MXS && OF 299 select STMP_DEVICE 300 help 301 Generic PWM framework driver for Freescale MXS. 302 303 To compile this driver as a module, choose M here: the module 304 will be called pwm-mxs. 305 306config PWM_OMAP_DMTIMER 307 tristate "OMAP Dual-Mode Timer PWM support" 308 depends on OF && ARCH_OMAP && OMAP_DM_TIMER 309 help 310 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 311 312 To compile this driver as a module, choose M here: the module 313 will be called pwm-omap-dmtimer 314 315config PWM_PCA9685 316 tristate "NXP PCA9685 PWM driver" 317 depends on I2C 318 select REGMAP_I2C 319 help 320 Generic PWM framework driver for NXP PCA9685 LED controller. 321 322 To compile this driver as a module, choose M here: the module 323 will be called pwm-pca9685. 324 325config PWM_PUV3 326 tristate "PKUnity NetBook-0916 PWM support" 327 depends on ARCH_PUV3 328 help 329 Generic PWM framework driver for PKUnity NetBook-0916. 330 331 To compile this driver as a module, choose M here: the module 332 will be called pwm-puv3. 333 334config PWM_PXA 335 tristate "PXA PWM support" 336 depends on ARCH_PXA 337 help 338 Generic PWM framework driver for PXA. 339 340 To compile this driver as a module, choose M here: the module 341 will be called pwm-pxa. 342 343config PWM_RCAR 344 tristate "Renesas R-Car PWM support" 345 depends on ARCH_RENESAS || COMPILE_TEST 346 depends on HAS_IOMEM 347 help 348 This driver exposes the PWM Timer controller found in Renesas 349 R-Car chips through the PWM API. 350 351 To compile this driver as a module, choose M here: the module 352 will be called pwm-rcar. 353 354config PWM_RENESAS_TPU 355 tristate "Renesas TPU PWM support" 356 depends on ARCH_RENESAS || COMPILE_TEST 357 depends on HAS_IOMEM 358 help 359 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 360 in Renesas chips through the PWM API. 361 362 To compile this driver as a module, choose M here: the module 363 will be called pwm-renesas-tpu. 364 365config PWM_ROCKCHIP 366 tristate "Rockchip PWM support" 367 depends on ARCH_ROCKCHIP 368 help 369 Generic PWM framework driver for the PWM controller found on 370 Rockchip SoCs. 371 372config PWM_SAMSUNG 373 tristate "Samsung PWM support" 374 depends on PLAT_SAMSUNG || ARCH_EXYNOS 375 help 376 Generic PWM framework driver for Samsung. 377 378 To compile this driver as a module, choose M here: the module 379 will be called pwm-samsung. 380 381config PWM_SPEAR 382 tristate "STMicroelectronics SPEAr PWM support" 383 depends on PLAT_SPEAR 384 depends on OF 385 help 386 Generic PWM framework driver for the PWM controller on ST 387 SPEAr SoCs. 388 389 To compile this driver as a module, choose M here: the module 390 will be called pwm-spear. 391 392config PWM_STI 393 tristate "STiH4xx PWM support" 394 depends on ARCH_STI 395 depends on OF 396 help 397 Generic PWM framework driver for STiH4xx SoCs. 398 399 To compile this driver as a module, choose M here: the module 400 will be called pwm-sti. 401 402config PWM_STM32 403 tristate "STMicroelectronics STM32 PWM" 404 depends on MFD_STM32_TIMERS || COMPILE_TEST 405 help 406 Generic PWM framework driver for STM32 SoCs. 407 408 To compile this driver as a module, choose M here: the module 409 will be called pwm-stm32. 410 411config PWM_STMPE 412 bool "STMPE expander PWM export" 413 depends on MFD_STMPE 414 help 415 This enables support for the PWMs found in the STMPE I/O 416 expanders. 417 418config PWM_SUN4I 419 tristate "Allwinner PWM support" 420 depends on ARCH_SUNXI || COMPILE_TEST 421 depends on HAS_IOMEM && COMMON_CLK 422 help 423 Generic PWM framework driver for Allwinner SoCs. 424 425 To compile this driver as a module, choose M here: the module 426 will be called pwm-sun4i. 427 428config PWM_TEGRA 429 tristate "NVIDIA Tegra PWM support" 430 depends on ARCH_TEGRA 431 help 432 Generic PWM framework driver for the PWFM controller found on NVIDIA 433 Tegra SoCs. 434 435 To compile this driver as a module, choose M here: the module 436 will be called pwm-tegra. 437 438config PWM_TIECAP 439 tristate "ECAP PWM support" 440 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 441 help 442 PWM driver support for the ECAP APWM controller found on AM33XX 443 TI SOC 444 445 To compile this driver as a module, choose M here: the module 446 will be called pwm-tiecap. 447 448config PWM_TIEHRPWM 449 tristate "EHRPWM PWM support" 450 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 451 help 452 PWM driver support for the EHRPWM controller found on AM33XX 453 TI SOC 454 455 To compile this driver as a module, choose M here: the module 456 will be called pwm-tiehrpwm. 457 458config PWM_TIPWMSS 459 bool 460 default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM) 461 help 462 PWM Subsystem driver support for AM33xx SOC. 463 464 PWM submodules require PWM config space access from submodule 465 drivers and require common parent driver support. 466 467config PWM_TWL 468 tristate "TWL4030/6030 PWM support" 469 depends on TWL4030_CORE 470 help 471 Generic PWM framework driver for TWL4030/6030. 472 473 To compile this driver as a module, choose M here: the module 474 will be called pwm-twl. 475 476config PWM_TWL_LED 477 tristate "TWL4030/6030 PWM support for LED drivers" 478 depends on TWL4030_CORE 479 help 480 Generic PWM framework driver for TWL4030/6030 LED terminals. 481 482 To compile this driver as a module, choose M here: the module 483 will be called pwm-twl-led. 484 485config PWM_VT8500 486 tristate "vt8500 PWM support" 487 depends on ARCH_VT8500 488 help 489 Generic PWM framework driver for vt8500. 490 491 To compile this driver as a module, choose M here: the module 492 will be called pwm-vt8500. 493 494endif 495