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_KONA 78 tristate "Kona PWM support" 79 depends on ARCH_BCM_MOBILE 80 help 81 Generic PWM framework driver for Broadcom Kona PWM block. 82 83 To compile this driver as a module, choose M here: the module 84 will be called pwm-bcm-kona. 85 86config PWM_BCM2835 87 tristate "BCM2835 PWM support" 88 depends on ARCH_BCM2835 89 help 90 PWM framework driver for BCM2835 controller (Raspberry Pi) 91 92 To compile this driver as a module, choose M here: the module 93 will be called pwm-bcm2835. 94 95config PWM_BERLIN 96 tristate "Marvell Berlin PWM support" 97 depends on ARCH_BERLIN 98 help 99 PWM framework driver for Marvell Berlin SoCs. 100 101 To compile this driver as a module, choose M here: the module 102 will be called pwm-berlin. 103 104config PWM_BFIN 105 tristate "Blackfin PWM support" 106 depends on BFIN_GPTIMERS 107 help 108 Generic PWM framework driver for Blackfin. 109 110 To compile this driver as a module, choose M here: the module 111 will be called pwm-bfin. 112 113config PWM_BRCMSTB 114 tristate "Broadcom STB PWM support" 115 depends on ARCH_BRCMSTB || BMIPS_GENERIC 116 help 117 Generic PWM framework driver for the Broadcom Set-top-Box 118 SoCs (BCM7xxx). 119 120 To compile this driver as a module, choose M Here: the module 121 will be called pwm-brcmstb.c. 122 123config PWM_CLPS711X 124 tristate "CLPS711X PWM support" 125 depends on ARCH_CLPS711X || COMPILE_TEST 126 depends on HAS_IOMEM 127 help 128 Generic PWM framework driver for Cirrus Logic CLPS711X. 129 130 To compile this driver as a module, choose M here: the module 131 will be called pwm-clps711x. 132 133config PWM_CRC 134 bool "Intel Crystalcove (CRC) PWM support" 135 depends on X86 && INTEL_SOC_PMIC 136 help 137 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM 138 control. 139 140config PWM_EP93XX 141 tristate "Cirrus Logic EP93xx PWM support" 142 depends on ARCH_EP93XX 143 help 144 Generic PWM framework driver for Cirrus Logic EP93xx. 145 146 To compile this driver as a module, choose M here: the module 147 will be called pwm-ep93xx. 148 149config PWM_FSL_FTM 150 tristate "Freescale FlexTimer Module (FTM) PWM support" 151 depends on HAS_IOMEM 152 depends on OF 153 select REGMAP_MMIO 154 help 155 Generic FTM PWM framework driver for Freescale VF610 and 156 Layerscape LS-1 SoCs. 157 158 To compile this driver as a module, choose M here: the module 159 will be called pwm-fsl-ftm. 160 161config PWM_IMG 162 tristate "Imagination Technologies PWM driver" 163 depends on HAS_IOMEM 164 depends on MFD_SYSCON 165 depends on COMMON_CLK 166 depends on MIPS || COMPILE_TEST 167 help 168 Generic PWM framework driver for Imagination Technologies 169 PWM block which supports 4 channels. 170 171 To compile this driver as a module, choose M here: the module 172 will be called pwm-img 173 174config PWM_IMX 175 tristate "i.MX PWM support" 176 depends on ARCH_MXC 177 help 178 Generic PWM framework driver for i.MX. 179 180 To compile this driver as a module, choose M here: the module 181 will be called pwm-imx. 182 183config PWM_JZ4740 184 tristate "Ingenic JZ4740 PWM support" 185 depends on MACH_JZ4740 186 help 187 Generic PWM framework driver for Ingenic JZ4740 based 188 machines. 189 190 To compile this driver as a module, choose M here: the module 191 will be called pwm-jz4740. 192 193config PWM_LP3943 194 tristate "TI/National Semiconductor LP3943 PWM support" 195 depends on MFD_LP3943 196 help 197 Generic PWM framework driver for LP3943 which supports two PWM 198 channels. 199 200 To compile this driver as a module, choose M here: the module 201 will be called pwm-lp3943. 202 203config PWM_LPC18XX_SCT 204 tristate "LPC18xx/43xx PWM/SCT support" 205 depends on ARCH_LPC18XX 206 help 207 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 208 supports 16 channels. 209 A maximum of 15 channels can be requested simultaneously and 210 must have the same period. 211 212 To compile this driver as a module, choose M here: the module 213 will be called pwm-lpc18xx-sct. 214 215config PWM_LPC32XX 216 tristate "LPC32XX PWM support" 217 depends on ARCH_LPC32XX 218 help 219 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 220 PWM controllers. 221 222 To compile this driver as a module, choose M here: the module 223 will be called pwm-lpc32xx. 224 225config PWM_LPSS 226 tristate 227 228config PWM_LPSS_PCI 229 tristate "Intel LPSS PWM PCI driver" 230 depends on X86 && PCI 231 select PWM_LPSS 232 help 233 The PCI driver for Intel Low Power Subsystem PWM controller. 234 235 To compile this driver as a module, choose M here: the module 236 will be called pwm-lpss-pci. 237 238config PWM_LPSS_PLATFORM 239 tristate "Intel LPSS PWM platform driver" 240 depends on X86 && ACPI 241 select PWM_LPSS 242 help 243 The platform driver for Intel Low Power Subsystem PWM controller. 244 245 To compile this driver as a module, choose M here: the module 246 will be called pwm-lpss-platform. 247 248config PWM_MTK_DISP 249 tristate "MediaTek display PWM driver" 250 depends on ARCH_MEDIATEK || COMPILE_TEST 251 depends on HAS_IOMEM 252 help 253 Generic PWM framework driver for MediaTek disp-pwm device. 254 The PWM is used to control the backlight brightness for display. 255 256 To compile this driver as a module, choose M here: the module 257 will be called pwm-mtk-disp. 258 259config PWM_MXS 260 tristate "Freescale MXS PWM support" 261 depends on ARCH_MXS && OF 262 select STMP_DEVICE 263 help 264 Generic PWM framework driver for Freescale MXS. 265 266 To compile this driver as a module, choose M here: the module 267 will be called pwm-mxs. 268 269config PWM_OMAP_DMTIMER 270 tristate "OMAP Dual-Mode Timer PWM support" 271 depends on OF && ARCH_OMAP && OMAP_DM_TIMER 272 help 273 Generic PWM framework driver for OMAP Dual-Mode Timer PWM output 274 275 To compile this driver as a module, choose M here: the module 276 will be called pwm-omap-dmtimer 277 278config PWM_PCA9685 279 tristate "NXP PCA9685 PWM driver" 280 depends on I2C 281 select REGMAP_I2C 282 help 283 Generic PWM framework driver for NXP PCA9685 LED controller. 284 285 To compile this driver as a module, choose M here: the module 286 will be called pwm-pca9685. 287 288config PWM_PUV3 289 tristate "PKUnity NetBook-0916 PWM support" 290 depends on ARCH_PUV3 291 help 292 Generic PWM framework driver for PKUnity NetBook-0916. 293 294 To compile this driver as a module, choose M here: the module 295 will be called pwm-puv3. 296 297config PWM_PXA 298 tristate "PXA PWM support" 299 depends on ARCH_PXA 300 help 301 Generic PWM framework driver for PXA. 302 303 To compile this driver as a module, choose M here: the module 304 will be called pwm-pxa. 305 306config PWM_RCAR 307 tristate "Renesas R-Car PWM support" 308 depends on ARCH_RCAR_GEN1 || ARCH_RCAR_GEN2 || COMPILE_TEST 309 depends on HAS_IOMEM 310 help 311 This driver exposes the PWM Timer controller found in Renesas 312 R-Car chips through the PWM API. 313 314 To compile this driver as a module, choose M here: the module 315 will be called pwm-rcar. 316 317config PWM_RENESAS_TPU 318 tristate "Renesas TPU PWM support" 319 depends on ARCH_RENESAS || COMPILE_TEST 320 depends on HAS_IOMEM 321 help 322 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 323 in Renesas chips through the PWM API. 324 325 To compile this driver as a module, choose M here: the module 326 will be called pwm-renesas-tpu. 327 328config PWM_ROCKCHIP 329 tristate "Rockchip PWM support" 330 depends on ARCH_ROCKCHIP 331 help 332 Generic PWM framework driver for the PWM controller found on 333 Rockchip SoCs. 334 335config PWM_SAMSUNG 336 tristate "Samsung PWM support" 337 depends on PLAT_SAMSUNG || ARCH_EXYNOS 338 help 339 Generic PWM framework driver for Samsung. 340 341 To compile this driver as a module, choose M here: the module 342 will be called pwm-samsung. 343 344config PWM_SPEAR 345 tristate "STMicroelectronics SPEAr PWM support" 346 depends on PLAT_SPEAR 347 depends on OF 348 help 349 Generic PWM framework driver for the PWM controller on ST 350 SPEAr SoCs. 351 352 To compile this driver as a module, choose M here: the module 353 will be called pwm-spear. 354 355config PWM_STI 356 tristate "STiH4xx PWM support" 357 depends on ARCH_STI 358 depends on OF 359 help 360 Generic PWM framework driver for STiH4xx SoCs. 361 362 To compile this driver as a module, choose M here: the module 363 will be called pwm-sti. 364 365config PWM_SUN4I 366 tristate "Allwinner PWM support" 367 depends on ARCH_SUNXI || COMPILE_TEST 368 depends on HAS_IOMEM && COMMON_CLK 369 help 370 Generic PWM framework driver for Allwinner SoCs. 371 372 To compile this driver as a module, choose M here: the module 373 will be called pwm-sun4i. 374 375config PWM_TEGRA 376 tristate "NVIDIA Tegra PWM support" 377 depends on ARCH_TEGRA 378 help 379 Generic PWM framework driver for the PWFM controller found on NVIDIA 380 Tegra SoCs. 381 382 To compile this driver as a module, choose M here: the module 383 will be called pwm-tegra. 384 385config PWM_TIECAP 386 tristate "ECAP PWM support" 387 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 388 help 389 PWM driver support for the ECAP APWM controller found on AM33XX 390 TI SOC 391 392 To compile this driver as a module, choose M here: the module 393 will be called pwm-tiecap. 394 395config PWM_TIEHRPWM 396 tristate "EHRPWM PWM support" 397 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 398 help 399 PWM driver support for the EHRPWM controller found on AM33XX 400 TI SOC 401 402 To compile this driver as a module, choose M here: the module 403 will be called pwm-tiehrpwm. 404 405config PWM_TIPWMSS 406 bool 407 default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM) 408 help 409 PWM Subsystem driver support for AM33xx SOC. 410 411 PWM submodules require PWM config space access from submodule 412 drivers and require common parent driver support. 413 414config PWM_TWL 415 tristate "TWL4030/6030 PWM support" 416 depends on TWL4030_CORE 417 help 418 Generic PWM framework driver for TWL4030/6030. 419 420 To compile this driver as a module, choose M here: the module 421 will be called pwm-twl. 422 423config PWM_TWL_LED 424 tristate "TWL4030/6030 PWM support for LED drivers" 425 depends on TWL4030_CORE 426 help 427 Generic PWM framework driver for TWL4030/6030 LED terminals. 428 429 To compile this driver as a module, choose M here: the module 430 will be called pwm-twl-led. 431 432config PWM_VT8500 433 tristate "vt8500 PWM support" 434 depends on ARCH_VT8500 435 help 436 Generic PWM framework driver for vt8500. 437 438 To compile this driver as a module, choose M here: the module 439 will be called pwm-vt8500. 440 441endif 442