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 80 help 81 Generic PWM framework driver for Broadcom iProc PWM block. This 82 block is used in Broadcom iProc SoC's. 83 84 To compile this driver as a module, choose M here: the module 85 will be called pwm-bcm-iproc. 86 87config PWM_BCM_KONA 88 tristate "Kona PWM support" 89 depends on ARCH_BCM_MOBILE 90 help 91 Generic PWM framework driver for Broadcom Kona PWM block. 92 93 To compile this driver as a module, choose M here: the module 94 will be called pwm-bcm-kona. 95 96config PWM_BCM2835 97 tristate "BCM2835 PWM support" 98 depends on ARCH_BCM2835 99 help 100 PWM framework driver for BCM2835 controller (Raspberry Pi) 101 102 To compile this driver as a module, choose M here: the module 103 will be called pwm-bcm2835. 104 105config PWM_BERLIN 106 tristate "Marvell Berlin PWM support" 107 depends on ARCH_BERLIN 108 help 109 PWM framework driver for Marvell Berlin SoCs. 110 111 To compile this driver as a module, choose M here: the module 112 will be called pwm-berlin. 113 114config PWM_BFIN 115 tristate "Blackfin PWM support" 116 depends on BFIN_GPTIMERS 117 help 118 Generic PWM framework driver for Blackfin. 119 120 To compile this driver as a module, choose M here: the module 121 will be called pwm-bfin. 122 123config PWM_BRCMSTB 124 tristate "Broadcom STB PWM support" 125 depends on ARCH_BRCMSTB || BMIPS_GENERIC 126 help 127 Generic PWM framework driver for the Broadcom Set-top-Box 128 SoCs (BCM7xxx). 129 130 To compile this driver as a module, choose M Here: the module 131 will be called pwm-brcmstb.c. 132 133config PWM_CLPS711X 134 tristate "CLPS711X PWM support" 135 depends on ARCH_CLPS711X || COMPILE_TEST 136 depends on HAS_IOMEM 137 help 138 Generic PWM framework driver for Cirrus Logic CLPS711X. 139 140 To compile this driver as a module, choose M here: the module 141 will be called pwm-clps711x. 142 143config PWM_CRC 144 bool "Intel Crystalcove (CRC) PWM support" 145 depends on X86 && INTEL_SOC_PMIC 146 help 147 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM 148 control. 149 150config PWM_CROS_EC 151 tristate "ChromeOS EC PWM driver" 152 depends on MFD_CROS_EC 153 help 154 PWM driver for exposing a PWM attached to the ChromeOS Embedded 155 Controller. 156 157config PWM_EP93XX 158 tristate "Cirrus Logic EP93xx PWM support" 159 depends on ARCH_EP93XX 160 help 161 Generic PWM framework driver for Cirrus Logic EP93xx. 162 163 To compile this driver as a module, choose M here: the module 164 will be called pwm-ep93xx. 165 166config PWM_FSL_FTM 167 tristate "Freescale FlexTimer Module (FTM) PWM support" 168 depends on HAS_IOMEM 169 depends on OF 170 select REGMAP_MMIO 171 help 172 Generic FTM PWM framework driver for Freescale VF610 and 173 Layerscape LS-1 SoCs. 174 175 To compile this driver as a module, choose M here: the module 176 will be called pwm-fsl-ftm. 177 178config PWM_HIBVT 179 tristate "HiSilicon BVT PWM support" 180 depends on ARCH_HISI || COMPILE_TEST 181 help 182 Generic PWM framework driver for HiSilicon BVT SoCs. 183 184 To compile this driver as a module, choose M here: the module 185 will be called pwm-hibvt. 186 187config PWM_IMG 188 tristate "Imagination Technologies PWM driver" 189 depends on HAS_IOMEM 190 depends on MFD_SYSCON 191 depends on COMMON_CLK 192 depends on MIPS || COMPILE_TEST 193 help 194 Generic PWM framework driver for Imagination Technologies 195 PWM block which supports 4 channels. 196 197 To compile this driver as a module, choose M here: the module 198 will be called pwm-img 199 200config PWM_IMX 201 tristate "i.MX PWM support" 202 depends on ARCH_MXC 203 help 204 Generic PWM framework driver for i.MX. 205 206 To compile this driver as a module, choose M here: the module 207 will be called pwm-imx. 208 209config PWM_JZ4740 210 tristate "Ingenic JZ4740 PWM support" 211 depends on MACH_JZ4740 212 help 213 Generic PWM framework driver for Ingenic JZ4740 based 214 machines. 215 216 To compile this driver as a module, choose M here: the module 217 will be called pwm-jz4740. 218 219config PWM_LP3943 220 tristate "TI/National Semiconductor LP3943 PWM support" 221 depends on MFD_LP3943 222 help 223 Generic PWM framework driver for LP3943 which supports two PWM 224 channels. 225 226 To compile this driver as a module, choose M here: the module 227 will be called pwm-lp3943. 228 229config PWM_LPC18XX_SCT 230 tristate "LPC18xx/43xx PWM/SCT support" 231 depends on ARCH_LPC18XX 232 help 233 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 234 supports 16 channels. 235 A maximum of 15 channels can be requested simultaneously and 236 must have the same period. 237 238 To compile this driver as a module, choose M here: the module 239 will be called pwm-lpc18xx-sct. 240 241config PWM_LPC32XX 242 tristate "LPC32XX PWM support" 243 depends on ARCH_LPC32XX 244 help 245 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 246 PWM controllers. 247 248 To compile this driver as a module, choose M here: the module 249 will be called pwm-lpc32xx. 250 251config PWM_LPSS 252 tristate 253 254config PWM_LPSS_PCI 255 tristate "Intel LPSS PWM PCI driver" 256 depends on X86 && PCI 257 select PWM_LPSS 258 help 259 The PCI driver for Intel Low Power Subsystem PWM controller. 260 261 To compile this driver as a module, choose M here: the module 262 will be called pwm-lpss-pci. 263 264config PWM_LPSS_PLATFORM 265 tristate "Intel LPSS PWM platform driver" 266 depends on X86 && ACPI 267 select PWM_LPSS 268 help 269 The platform driver for Intel Low Power Subsystem PWM controller. 270 271 To compile this driver as a module, choose M here: the module 272 will be called pwm-lpss-platform. 273 274config PWM_MESON 275 tristate "Amlogic Meson PWM driver" 276 depends on ARCH_MESON 277 help 278 The platform driver for Amlogic Meson PWM controller. 279 280 To compile this driver as a module, choose M here: the module 281 will be called pwm-meson. 282 283config PWM_MTK_DISP 284 tristate "MediaTek display PWM driver" 285 depends on ARCH_MEDIATEK || COMPILE_TEST 286 depends on HAS_IOMEM 287 help 288 Generic PWM framework driver for MediaTek disp-pwm device. 289 The PWM is used to control the backlight brightness for display. 290 291 To compile this driver as a module, choose M here: the module 292 will be called pwm-mtk-disp. 293 294config PWM_MXS 295 tristate "Freescale MXS PWM support" 296 depends on ARCH_MXS && OF 297 select STMP_DEVICE 298 help 299 Generic PWM framework driver for Freescale MXS. 300 301 To compile this driver as a module, choose M here: the module 302 will be called pwm-mxs. 303 304config PWM_OMAP_DMTIMER 305 tristate "OMAP Dual-Mode Timer PWM support" 306 depends on OF && ARCH_OMAP && OMAP_DM_TIMER 307 help 308 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 309 310 To compile this driver as a module, choose M here: the module 311 will be called pwm-omap-dmtimer 312 313config PWM_PCA9685 314 tristate "NXP PCA9685 PWM driver" 315 depends on I2C 316 select REGMAP_I2C 317 help 318 Generic PWM framework driver for NXP PCA9685 LED controller. 319 320 To compile this driver as a module, choose M here: the module 321 will be called pwm-pca9685. 322 323config PWM_PUV3 324 tristate "PKUnity NetBook-0916 PWM support" 325 depends on ARCH_PUV3 326 help 327 Generic PWM framework driver for PKUnity NetBook-0916. 328 329 To compile this driver as a module, choose M here: the module 330 will be called pwm-puv3. 331 332config PWM_PXA 333 tristate "PXA PWM support" 334 depends on ARCH_PXA 335 help 336 Generic PWM framework driver for PXA. 337 338 To compile this driver as a module, choose M here: the module 339 will be called pwm-pxa. 340 341config PWM_RCAR 342 tristate "Renesas R-Car PWM support" 343 depends on ARCH_RENESAS || COMPILE_TEST 344 depends on HAS_IOMEM 345 help 346 This driver exposes the PWM Timer controller found in Renesas 347 R-Car chips through the PWM API. 348 349 To compile this driver as a module, choose M here: the module 350 will be called pwm-rcar. 351 352config PWM_RENESAS_TPU 353 tristate "Renesas TPU PWM support" 354 depends on ARCH_RENESAS || COMPILE_TEST 355 depends on HAS_IOMEM 356 help 357 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 358 in Renesas chips through the PWM API. 359 360 To compile this driver as a module, choose M here: the module 361 will be called pwm-renesas-tpu. 362 363config PWM_ROCKCHIP 364 tristate "Rockchip PWM support" 365 depends on ARCH_ROCKCHIP 366 help 367 Generic PWM framework driver for the PWM controller found on 368 Rockchip SoCs. 369 370config PWM_SAMSUNG 371 tristate "Samsung PWM support" 372 depends on PLAT_SAMSUNG || ARCH_EXYNOS 373 help 374 Generic PWM framework driver for Samsung. 375 376 To compile this driver as a module, choose M here: the module 377 will be called pwm-samsung. 378 379config PWM_SPEAR 380 tristate "STMicroelectronics SPEAr PWM support" 381 depends on PLAT_SPEAR 382 depends on OF 383 help 384 Generic PWM framework driver for the PWM controller on ST 385 SPEAr SoCs. 386 387 To compile this driver as a module, choose M here: the module 388 will be called pwm-spear. 389 390config PWM_STI 391 tristate "STiH4xx PWM support" 392 depends on ARCH_STI 393 depends on OF 394 help 395 Generic PWM framework driver for STiH4xx SoCs. 396 397 To compile this driver as a module, choose M here: the module 398 will be called pwm-sti. 399 400config PWM_STMPE 401 bool "STMPE expander PWM export" 402 depends on MFD_STMPE 403 help 404 This enables support for the PWMs found in the STMPE I/O 405 expanders. 406 407config PWM_SUN4I 408 tristate "Allwinner PWM support" 409 depends on ARCH_SUNXI || COMPILE_TEST 410 depends on HAS_IOMEM && COMMON_CLK 411 help 412 Generic PWM framework driver for Allwinner SoCs. 413 414 To compile this driver as a module, choose M here: the module 415 will be called pwm-sun4i. 416 417config PWM_TEGRA 418 tristate "NVIDIA Tegra PWM support" 419 depends on ARCH_TEGRA 420 help 421 Generic PWM framework driver for the PWFM controller found on NVIDIA 422 Tegra SoCs. 423 424 To compile this driver as a module, choose M here: the module 425 will be called pwm-tegra. 426 427config PWM_TIECAP 428 tristate "ECAP PWM support" 429 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 430 help 431 PWM driver support for the ECAP APWM controller found on AM33XX 432 TI SOC 433 434 To compile this driver as a module, choose M here: the module 435 will be called pwm-tiecap. 436 437config PWM_TIEHRPWM 438 tristate "EHRPWM PWM support" 439 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 440 help 441 PWM driver support for the EHRPWM controller found on AM33XX 442 TI SOC 443 444 To compile this driver as a module, choose M here: the module 445 will be called pwm-tiehrpwm. 446 447config PWM_TIPWMSS 448 bool 449 default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM) 450 help 451 PWM Subsystem driver support for AM33xx SOC. 452 453 PWM submodules require PWM config space access from submodule 454 drivers and require common parent driver support. 455 456config PWM_TWL 457 tristate "TWL4030/6030 PWM support" 458 depends on TWL4030_CORE 459 help 460 Generic PWM framework driver for TWL4030/6030. 461 462 To compile this driver as a module, choose M here: the module 463 will be called pwm-twl. 464 465config PWM_TWL_LED 466 tristate "TWL4030/6030 PWM support for LED drivers" 467 depends on TWL4030_CORE 468 help 469 Generic PWM framework driver for TWL4030/6030 LED terminals. 470 471 To compile this driver as a module, choose M here: the module 472 will be called pwm-twl-led. 473 474config PWM_VT8500 475 tristate "vt8500 PWM support" 476 depends on ARCH_VT8500 477 help 478 Generic PWM framework driver for vt8500. 479 480 To compile this driver as a module, choose M here: the module 481 will be called pwm-vt8500. 482 483endif 484