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_IMG 179 tristate "Imagination Technologies PWM driver" 180 depends on HAS_IOMEM 181 depends on MFD_SYSCON 182 depends on COMMON_CLK 183 depends on MIPS || COMPILE_TEST 184 help 185 Generic PWM framework driver for Imagination Technologies 186 PWM block which supports 4 channels. 187 188 To compile this driver as a module, choose M here: the module 189 will be called pwm-img 190 191config PWM_IMX 192 tristate "i.MX PWM support" 193 depends on ARCH_MXC 194 help 195 Generic PWM framework driver for i.MX. 196 197 To compile this driver as a module, choose M here: the module 198 will be called pwm-imx. 199 200config PWM_JZ4740 201 tristate "Ingenic JZ4740 PWM support" 202 depends on MACH_JZ4740 203 help 204 Generic PWM framework driver for Ingenic JZ4740 based 205 machines. 206 207 To compile this driver as a module, choose M here: the module 208 will be called pwm-jz4740. 209 210config PWM_LP3943 211 tristate "TI/National Semiconductor LP3943 PWM support" 212 depends on MFD_LP3943 213 help 214 Generic PWM framework driver for LP3943 which supports two PWM 215 channels. 216 217 To compile this driver as a module, choose M here: the module 218 will be called pwm-lp3943. 219 220config PWM_LPC18XX_SCT 221 tristate "LPC18xx/43xx PWM/SCT support" 222 depends on ARCH_LPC18XX 223 help 224 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 225 supports 16 channels. 226 A maximum of 15 channels can be requested simultaneously and 227 must have the same period. 228 229 To compile this driver as a module, choose M here: the module 230 will be called pwm-lpc18xx-sct. 231 232config PWM_LPC32XX 233 tristate "LPC32XX PWM support" 234 depends on ARCH_LPC32XX 235 help 236 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 237 PWM controllers. 238 239 To compile this driver as a module, choose M here: the module 240 will be called pwm-lpc32xx. 241 242config PWM_LPSS 243 tristate 244 245config PWM_LPSS_PCI 246 tristate "Intel LPSS PWM PCI driver" 247 depends on X86 && PCI 248 select PWM_LPSS 249 help 250 The PCI driver for Intel Low Power Subsystem PWM controller. 251 252 To compile this driver as a module, choose M here: the module 253 will be called pwm-lpss-pci. 254 255config PWM_LPSS_PLATFORM 256 tristate "Intel LPSS PWM platform driver" 257 depends on X86 && ACPI 258 select PWM_LPSS 259 help 260 The platform driver for Intel Low Power Subsystem PWM controller. 261 262 To compile this driver as a module, choose M here: the module 263 will be called pwm-lpss-platform. 264 265config PWM_MESON 266 tristate "Amlogic Meson PWM driver" 267 depends on ARCH_MESON 268 help 269 The platform driver for Amlogic Meson PWM controller. 270 271 To compile this driver as a module, choose M here: the module 272 will be called pwm-meson. 273 274config PWM_MTK_DISP 275 tristate "MediaTek display PWM driver" 276 depends on ARCH_MEDIATEK || COMPILE_TEST 277 depends on HAS_IOMEM 278 help 279 Generic PWM framework driver for MediaTek disp-pwm device. 280 The PWM is used to control the backlight brightness for display. 281 282 To compile this driver as a module, choose M here: the module 283 will be called pwm-mtk-disp. 284 285config PWM_MXS 286 tristate "Freescale MXS PWM support" 287 depends on ARCH_MXS && OF 288 select STMP_DEVICE 289 help 290 Generic PWM framework driver for Freescale MXS. 291 292 To compile this driver as a module, choose M here: the module 293 will be called pwm-mxs. 294 295config PWM_OMAP_DMTIMER 296 tristate "OMAP Dual-Mode Timer PWM support" 297 depends on OF && ARCH_OMAP && OMAP_DM_TIMER 298 help 299 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 300 301 To compile this driver as a module, choose M here: the module 302 will be called pwm-omap-dmtimer 303 304config PWM_PCA9685 305 tristate "NXP PCA9685 PWM driver" 306 depends on I2C 307 select REGMAP_I2C 308 help 309 Generic PWM framework driver for NXP PCA9685 LED controller. 310 311 To compile this driver as a module, choose M here: the module 312 will be called pwm-pca9685. 313 314config PWM_PUV3 315 tristate "PKUnity NetBook-0916 PWM support" 316 depends on ARCH_PUV3 317 help 318 Generic PWM framework driver for PKUnity NetBook-0916. 319 320 To compile this driver as a module, choose M here: the module 321 will be called pwm-puv3. 322 323config PWM_PXA 324 tristate "PXA PWM support" 325 depends on ARCH_PXA 326 help 327 Generic PWM framework driver for PXA. 328 329 To compile this driver as a module, choose M here: the module 330 will be called pwm-pxa. 331 332config PWM_RCAR 333 tristate "Renesas R-Car PWM support" 334 depends on ARCH_RENESAS || COMPILE_TEST 335 depends on HAS_IOMEM 336 help 337 This driver exposes the PWM Timer controller found in Renesas 338 R-Car chips through the PWM API. 339 340 To compile this driver as a module, choose M here: the module 341 will be called pwm-rcar. 342 343config PWM_RENESAS_TPU 344 tristate "Renesas TPU PWM support" 345 depends on ARCH_RENESAS || COMPILE_TEST 346 depends on HAS_IOMEM 347 help 348 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 349 in Renesas chips through the PWM API. 350 351 To compile this driver as a module, choose M here: the module 352 will be called pwm-renesas-tpu. 353 354config PWM_ROCKCHIP 355 tristate "Rockchip PWM support" 356 depends on ARCH_ROCKCHIP 357 help 358 Generic PWM framework driver for the PWM controller found on 359 Rockchip SoCs. 360 361config PWM_SAMSUNG 362 tristate "Samsung PWM support" 363 depends on PLAT_SAMSUNG || ARCH_EXYNOS 364 help 365 Generic PWM framework driver for Samsung. 366 367 To compile this driver as a module, choose M here: the module 368 will be called pwm-samsung. 369 370config PWM_SPEAR 371 tristate "STMicroelectronics SPEAr PWM support" 372 depends on PLAT_SPEAR 373 depends on OF 374 help 375 Generic PWM framework driver for the PWM controller on ST 376 SPEAr SoCs. 377 378 To compile this driver as a module, choose M here: the module 379 will be called pwm-spear. 380 381config PWM_STI 382 tristate "STiH4xx PWM support" 383 depends on ARCH_STI 384 depends on OF 385 help 386 Generic PWM framework driver for STiH4xx SoCs. 387 388 To compile this driver as a module, choose M here: the module 389 will be called pwm-sti. 390 391config PWM_STMPE 392 bool "STMPE expander PWM export" 393 depends on MFD_STMPE 394 help 395 This enables support for the PWMs found in the STMPE I/O 396 expanders. 397 398config PWM_SUN4I 399 tristate "Allwinner PWM support" 400 depends on ARCH_SUNXI || COMPILE_TEST 401 depends on HAS_IOMEM && COMMON_CLK 402 help 403 Generic PWM framework driver for Allwinner SoCs. 404 405 To compile this driver as a module, choose M here: the module 406 will be called pwm-sun4i. 407 408config PWM_TEGRA 409 tristate "NVIDIA Tegra PWM support" 410 depends on ARCH_TEGRA 411 help 412 Generic PWM framework driver for the PWFM controller found on NVIDIA 413 Tegra SoCs. 414 415 To compile this driver as a module, choose M here: the module 416 will be called pwm-tegra. 417 418config PWM_TIECAP 419 tristate "ECAP PWM support" 420 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 421 help 422 PWM driver support for the ECAP APWM controller found on AM33XX 423 TI SOC 424 425 To compile this driver as a module, choose M here: the module 426 will be called pwm-tiecap. 427 428config PWM_TIEHRPWM 429 tristate "EHRPWM PWM support" 430 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 431 help 432 PWM driver support for the EHRPWM controller found on AM33XX 433 TI SOC 434 435 To compile this driver as a module, choose M here: the module 436 will be called pwm-tiehrpwm. 437 438config PWM_TIPWMSS 439 bool 440 default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM) 441 help 442 PWM Subsystem driver support for AM33xx SOC. 443 444 PWM submodules require PWM config space access from submodule 445 drivers and require common parent driver support. 446 447config PWM_TWL 448 tristate "TWL4030/6030 PWM support" 449 depends on TWL4030_CORE 450 help 451 Generic PWM framework driver for TWL4030/6030. 452 453 To compile this driver as a module, choose M here: the module 454 will be called pwm-twl. 455 456config PWM_TWL_LED 457 tristate "TWL4030/6030 PWM support for LED drivers" 458 depends on TWL4030_CORE 459 help 460 Generic PWM framework driver for TWL4030/6030 LED terminals. 461 462 To compile this driver as a module, choose M here: the module 463 will be called pwm-twl-led. 464 465config PWM_VT8500 466 tristate "vt8500 PWM support" 467 depends on ARCH_VT8500 468 help 469 Generic PWM framework driver for vt8500. 470 471 To compile this driver as a module, choose M here: the module 472 will be called pwm-vt8500. 473 474endif 475