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_IMX 196 tristate "i.MX PWM support" 197 depends on ARCH_MXC 198 help 199 Generic PWM framework driver for i.MX. 200 201 To compile this driver as a module, choose M here: the module 202 will be called pwm-imx. 203 204config PWM_JZ4740 205 tristate "Ingenic JZ47xx PWM support" 206 depends on MACH_INGENIC 207 help 208 Generic PWM framework driver for Ingenic JZ47xx based 209 machines. 210 211 To compile this driver as a module, choose M here: the module 212 will be called pwm-jz4740. 213 214config PWM_LP3943 215 tristate "TI/National Semiconductor LP3943 PWM support" 216 depends on MFD_LP3943 217 help 218 Generic PWM framework driver for LP3943 which supports two PWM 219 channels. 220 221 To compile this driver as a module, choose M here: the module 222 will be called pwm-lp3943. 223 224config PWM_LPC18XX_SCT 225 tristate "LPC18xx/43xx PWM/SCT support" 226 depends on ARCH_LPC18XX 227 help 228 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 229 supports 16 channels. 230 A maximum of 15 channels can be requested simultaneously and 231 must have the same period. 232 233 To compile this driver as a module, choose M here: the module 234 will be called pwm-lpc18xx-sct. 235 236config PWM_LPC32XX 237 tristate "LPC32XX PWM support" 238 depends on ARCH_LPC32XX 239 help 240 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 241 PWM controllers. 242 243 To compile this driver as a module, choose M here: the module 244 will be called pwm-lpc32xx. 245 246config PWM_LPSS 247 tristate 248 249config PWM_LPSS_PCI 250 tristate "Intel LPSS PWM PCI driver" 251 depends on X86 && PCI 252 select PWM_LPSS 253 help 254 The PCI driver for Intel Low Power Subsystem PWM controller. 255 256 To compile this driver as a module, choose M here: the module 257 will be called pwm-lpss-pci. 258 259config PWM_LPSS_PLATFORM 260 tristate "Intel LPSS PWM platform driver" 261 depends on X86 && ACPI 262 select PWM_LPSS 263 help 264 The platform driver for Intel Low Power Subsystem PWM controller. 265 266 To compile this driver as a module, choose M here: the module 267 will be called pwm-lpss-platform. 268 269config PWM_MESON 270 tristate "Amlogic Meson PWM driver" 271 depends on ARCH_MESON 272 help 273 The platform driver for Amlogic Meson PWM controller. 274 275 To compile this driver as a module, choose M here: the module 276 will be called pwm-meson. 277 278config PWM_MTK_DISP 279 tristate "MediaTek display PWM driver" 280 depends on ARCH_MEDIATEK || COMPILE_TEST 281 depends on HAS_IOMEM 282 help 283 Generic PWM framework driver for MediaTek disp-pwm device. 284 The PWM is used to control the backlight brightness for display. 285 286 To compile this driver as a module, choose M here: the module 287 will be called pwm-mtk-disp. 288 289config PWM_MEDIATEK 290 tristate "MediaTek PWM support" 291 depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST 292 help 293 Generic PWM framework driver for Mediatek ARM SoC. 294 295 To compile this driver as a module, choose M here: the module 296 will be called pwm-mediatek. 297 298config PWM_MXS 299 tristate "Freescale MXS PWM support" 300 depends on ARCH_MXS && OF 301 select STMP_DEVICE 302 help 303 Generic PWM framework driver for Freescale MXS. 304 305 To compile this driver as a module, choose M here: the module 306 will be called pwm-mxs. 307 308config PWM_OMAP_DMTIMER 309 tristate "OMAP Dual-Mode Timer PWM support" 310 depends on OF && ARCH_OMAP && OMAP_DM_TIMER 311 help 312 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 313 314 To compile this driver as a module, choose M here: the module 315 will be called pwm-omap-dmtimer 316 317config PWM_PCA9685 318 tristate "NXP PCA9685 PWM driver" 319 depends on I2C 320 select REGMAP_I2C 321 help 322 Generic PWM framework driver for NXP PCA9685 LED controller. 323 324 To compile this driver as a module, choose M here: the module 325 will be called pwm-pca9685. 326 327config PWM_PUV3 328 tristate "PKUnity NetBook-0916 PWM support" 329 depends on ARCH_PUV3 330 help 331 Generic PWM framework driver for PKUnity NetBook-0916. 332 333 To compile this driver as a module, choose M here: the module 334 will be called pwm-puv3. 335 336config PWM_PXA 337 tristate "PXA PWM support" 338 depends on ARCH_PXA 339 help 340 Generic PWM framework driver for PXA. 341 342 To compile this driver as a module, choose M here: the module 343 will be called pwm-pxa. 344 345config PWM_RCAR 346 tristate "Renesas R-Car PWM support" 347 depends on ARCH_RENESAS || COMPILE_TEST 348 depends on HAS_IOMEM 349 help 350 This driver exposes the PWM Timer controller found in Renesas 351 R-Car chips through the PWM API. 352 353 To compile this driver as a module, choose M here: the module 354 will be called pwm-rcar. 355 356config PWM_RENESAS_TPU 357 tristate "Renesas TPU PWM support" 358 depends on ARCH_RENESAS || COMPILE_TEST 359 depends on HAS_IOMEM 360 help 361 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 362 in Renesas chips through the PWM API. 363 364 To compile this driver as a module, choose M here: the module 365 will be called pwm-renesas-tpu. 366 367config PWM_ROCKCHIP 368 tristate "Rockchip PWM support" 369 depends on ARCH_ROCKCHIP 370 help 371 Generic PWM framework driver for the PWM controller found on 372 Rockchip SoCs. 373 374config PWM_SAMSUNG 375 tristate "Samsung PWM support" 376 depends on PLAT_SAMSUNG || ARCH_EXYNOS 377 help 378 Generic PWM framework driver for Samsung. 379 380 To compile this driver as a module, choose M here: the module 381 will be called pwm-samsung. 382 383config PWM_SPEAR 384 tristate "STMicroelectronics SPEAr PWM support" 385 depends on PLAT_SPEAR 386 depends on OF 387 help 388 Generic PWM framework driver for the PWM controller on ST 389 SPEAr SoCs. 390 391 To compile this driver as a module, choose M here: the module 392 will be called pwm-spear. 393 394config PWM_STI 395 tristate "STiH4xx PWM support" 396 depends on ARCH_STI 397 depends on OF 398 help 399 Generic PWM framework driver for STiH4xx SoCs. 400 401 To compile this driver as a module, choose M here: the module 402 will be called pwm-sti. 403 404config PWM_STM32 405 tristate "STMicroelectronics STM32 PWM" 406 depends on MFD_STM32_TIMERS 407 help 408 Generic PWM framework driver for STM32 SoCs. 409 410 To compile this driver as a module, choose M here: the module 411 will be called pwm-stm32. 412 413config PWM_STM32_LP 414 tristate "STMicroelectronics STM32 PWM LP" 415 depends on MFD_STM32_LPTIMER || COMPILE_TEST 416 help 417 Generic PWM framework driver for STMicroelectronics STM32 SoCs 418 with Low-Power Timer (LPTIM). 419 420 To compile this driver as a module, choose M here: the module 421 will be called pwm-stm32-lp. 422 423config PWM_STMPE 424 bool "STMPE expander PWM export" 425 depends on MFD_STMPE 426 help 427 This enables support for the PWMs found in the STMPE I/O 428 expanders. 429 430config PWM_SUN4I 431 tristate "Allwinner PWM support" 432 depends on ARCH_SUNXI || COMPILE_TEST 433 depends on HAS_IOMEM && COMMON_CLK 434 help 435 Generic PWM framework driver for Allwinner SoCs. 436 437 To compile this driver as a module, choose M here: the module 438 will be called pwm-sun4i. 439 440config PWM_TEGRA 441 tristate "NVIDIA Tegra PWM support" 442 depends on ARCH_TEGRA 443 help 444 Generic PWM framework driver for the PWFM controller found on NVIDIA 445 Tegra SoCs. 446 447 To compile this driver as a module, choose M here: the module 448 will be called pwm-tegra. 449 450config PWM_TIECAP 451 tristate "ECAP PWM support" 452 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX || ARCH_KEYSTONE || ARCH_K3 453 help 454 PWM driver support for the ECAP APWM controller found on TI SOCs 455 456 To compile this driver as a module, choose M here: the module 457 will be called pwm-tiecap. 458 459config PWM_TIEHRPWM 460 tristate "EHRPWM PWM support" 461 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 462 help 463 PWM driver support for the EHRPWM controller found on AM33XX 464 TI SOC 465 466 To compile this driver as a module, choose M here: the module 467 will be called pwm-tiehrpwm. 468 469config PWM_TIPWMSS 470 bool 471 default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM) 472 help 473 PWM Subsystem driver support for AM33xx SOC. 474 475 PWM submodules require PWM config space access from submodule 476 drivers and require common parent driver support. 477 478config PWM_TWL 479 tristate "TWL4030/6030 PWM support" 480 depends on TWL4030_CORE 481 help 482 Generic PWM framework driver for TWL4030/6030. 483 484 To compile this driver as a module, choose M here: the module 485 will be called pwm-twl. 486 487config PWM_TWL_LED 488 tristate "TWL4030/6030 PWM support for LED drivers" 489 depends on TWL4030_CORE 490 help 491 Generic PWM framework driver for TWL4030/6030 LED terminals. 492 493 To compile this driver as a module, choose M here: the module 494 will be called pwm-twl-led. 495 496config PWM_VT8500 497 tristate "vt8500 PWM support" 498 depends on ARCH_VT8500 499 help 500 Generic PWM framework driver for vt8500. 501 502 To compile this driver as a module, choose M here: the module 503 will be called pwm-vt8500. 504 505config PWM_ZX 506 tristate "ZTE ZX PWM support" 507 depends on ARCH_ZX 508 help 509 Generic PWM framework driver for ZTE ZX family SoCs. 510 511 To compile this driver as a module, choose M here: the module 512 will be called pwm-zx. 513 514endif 515