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 OF 152 select REGMAP_MMIO 153 help 154 Generic FTM PWM framework driver for Freescale VF610 and 155 Layerscape LS-1 SoCs. 156 157 To compile this driver as a module, choose M here: the module 158 will be called pwm-fsl-ftm. 159 160config PWM_IMG 161 tristate "Imagination Technologies PWM driver" 162 depends on HAS_IOMEM 163 depends on MFD_SYSCON 164 depends on COMMON_CLK 165 depends on MIPS || COMPILE_TEST 166 help 167 Generic PWM framework driver for Imagination Technologies 168 PWM block which supports 4 channels. 169 170 To compile this driver as a module, choose M here: the module 171 will be called pwm-img 172 173config PWM_IMX 174 tristate "i.MX PWM support" 175 depends on ARCH_MXC 176 help 177 Generic PWM framework driver for i.MX. 178 179 To compile this driver as a module, choose M here: the module 180 will be called pwm-imx. 181 182config PWM_JZ4740 183 tristate "Ingenic JZ4740 PWM support" 184 depends on MACH_JZ4740 185 help 186 Generic PWM framework driver for Ingenic JZ4740 based 187 machines. 188 189 To compile this driver as a module, choose M here: the module 190 will be called pwm-jz4740. 191 192config PWM_LP3943 193 tristate "TI/National Semiconductor LP3943 PWM support" 194 depends on MFD_LP3943 195 help 196 Generic PWM framework driver for LP3943 which supports two PWM 197 channels. 198 199 To compile this driver as a module, choose M here: the module 200 will be called pwm-lp3943. 201 202config PWM_LPC18XX_SCT 203 tristate "LPC18xx/43xx PWM/SCT support" 204 depends on ARCH_LPC18XX 205 help 206 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 207 supports 16 channels. 208 A maximum of 15 channels can be requested simultaneously and 209 must have the same period. 210 211 To compile this driver as a module, choose M here: the module 212 will be called pwm-lpc18xx-sct. 213 214config PWM_LPC32XX 215 tristate "LPC32XX PWM support" 216 depends on ARCH_LPC32XX 217 help 218 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 219 PWM controllers. 220 221 To compile this driver as a module, choose M here: the module 222 will be called pwm-lpc32xx. 223 224config PWM_LPSS 225 tristate "Intel LPSS PWM support" 226 depends on X86 227 help 228 Generic PWM framework driver for Intel Low Power Subsystem PWM 229 controller. 230 231 To compile this driver as a module, choose M here: the module 232 will be called pwm-lpss. 233 234config PWM_LPSS_PCI 235 tristate "Intel LPSS PWM PCI driver" 236 depends on PWM_LPSS && PCI 237 help 238 The PCI driver for Intel Low Power Subsystem PWM controller. 239 240 To compile this driver as a module, choose M here: the module 241 will be called pwm-lpss-pci. 242 243config PWM_LPSS_PLATFORM 244 tristate "Intel LPSS PWM platform driver" 245 depends on PWM_LPSS && ACPI 246 help 247 The platform driver for Intel Low Power Subsystem PWM controller. 248 249 To compile this driver as a module, choose M here: the module 250 will be called pwm-lpss-platform. 251 252config PWM_MTK_DISP 253 tristate "MediaTek display PWM driver" 254 depends on ARCH_MEDIATEK || COMPILE_TEST 255 depends on HAS_IOMEM 256 help 257 Generic PWM framework driver for MediaTek disp-pwm device. 258 The PWM is used to control the backlight brightness for display. 259 260 To compile this driver as a module, choose M here: the module 261 will be called pwm-mtk-disp. 262 263config PWM_MXS 264 tristate "Freescale MXS PWM support" 265 depends on ARCH_MXS && OF 266 select STMP_DEVICE 267 help 268 Generic PWM framework driver for Freescale MXS. 269 270 To compile this driver as a module, choose M here: the module 271 will be called pwm-mxs. 272 273config PWM_PCA9685 274 tristate "NXP PCA9685 PWM driver" 275 depends on I2C 276 select REGMAP_I2C 277 help 278 Generic PWM framework driver for NXP PCA9685 LED controller. 279 280 To compile this driver as a module, choose M here: the module 281 will be called pwm-pca9685. 282 283config PWM_PUV3 284 tristate "PKUnity NetBook-0916 PWM support" 285 depends on ARCH_PUV3 286 help 287 Generic PWM framework driver for PKUnity NetBook-0916. 288 289 To compile this driver as a module, choose M here: the module 290 will be called pwm-puv3. 291 292config PWM_PXA 293 tristate "PXA PWM support" 294 depends on ARCH_PXA 295 help 296 Generic PWM framework driver for PXA. 297 298 To compile this driver as a module, choose M here: the module 299 will be called pwm-pxa. 300 301config PWM_RCAR 302 tristate "Renesas R-Car PWM support" 303 depends on ARCH_RCAR_GEN1 || ARCH_RCAR_GEN2 || COMPILE_TEST 304 depends on HAS_IOMEM 305 help 306 This driver exposes the PWM Timer controller found in Renesas 307 R-Car chips through the PWM API. 308 309 To compile this driver as a module, choose M here: the module 310 will be called pwm-rcar. 311 312config PWM_RENESAS_TPU 313 tristate "Renesas TPU PWM support" 314 depends on ARCH_SHMOBILE || COMPILE_TEST 315 depends on HAS_IOMEM 316 help 317 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 318 in Renesas chips through the PWM API. 319 320 To compile this driver as a module, choose M here: the module 321 will be called pwm-renesas-tpu. 322 323config PWM_ROCKCHIP 324 tristate "Rockchip PWM support" 325 depends on ARCH_ROCKCHIP 326 help 327 Generic PWM framework driver for the PWM controller found on 328 Rockchip SoCs. 329 330config PWM_SAMSUNG 331 tristate "Samsung PWM support" 332 depends on PLAT_SAMSUNG || ARCH_EXYNOS 333 help 334 Generic PWM framework driver for Samsung. 335 336 To compile this driver as a module, choose M here: the module 337 will be called pwm-samsung. 338 339config PWM_SPEAR 340 tristate "STMicroelectronics SPEAr PWM support" 341 depends on PLAT_SPEAR 342 depends on OF 343 help 344 Generic PWM framework driver for the PWM controller on ST 345 SPEAr SoCs. 346 347 To compile this driver as a module, choose M here: the module 348 will be called pwm-spear. 349 350config PWM_STI 351 tristate "STiH4xx PWM support" 352 depends on ARCH_STI 353 depends on OF 354 help 355 Generic PWM framework driver for STiH4xx SoCs. 356 357 To compile this driver as a module, choose M here: the module 358 will be called pwm-sti. 359 360config PWM_SUN4I 361 tristate "Allwinner PWM support" 362 depends on ARCH_SUNXI || COMPILE_TEST 363 depends on HAS_IOMEM && COMMON_CLK 364 help 365 Generic PWM framework driver for Allwinner SoCs. 366 367 To compile this driver as a module, choose M here: the module 368 will be called pwm-sun4i. 369 370config PWM_TEGRA 371 tristate "NVIDIA Tegra PWM support" 372 depends on ARCH_TEGRA 373 help 374 Generic PWM framework driver for the PWFM controller found on NVIDIA 375 Tegra SoCs. 376 377 To compile this driver as a module, choose M here: the module 378 will be called pwm-tegra. 379 380config PWM_TIECAP 381 tristate "ECAP PWM support" 382 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 383 help 384 PWM driver support for the ECAP APWM controller found on AM33XX 385 TI SOC 386 387 To compile this driver as a module, choose M here: the module 388 will be called pwm-tiecap. 389 390config PWM_TIEHRPWM 391 tristate "EHRPWM PWM support" 392 depends on ARCH_OMAP2PLUS || ARCH_DAVINCI_DA8XX 393 help 394 PWM driver support for the EHRPWM controller found on AM33XX 395 TI SOC 396 397 To compile this driver as a module, choose M here: the module 398 will be called pwm-tiehrpwm. 399 400config PWM_TIPWMSS 401 bool 402 default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM) 403 help 404 PWM Subsystem driver support for AM33xx SOC. 405 406 PWM submodules require PWM config space access from submodule 407 drivers and require common parent driver support. 408 409config PWM_TWL 410 tristate "TWL4030/6030 PWM support" 411 depends on TWL4030_CORE 412 help 413 Generic PWM framework driver for TWL4030/6030. 414 415 To compile this driver as a module, choose M here: the module 416 will be called pwm-twl. 417 418config PWM_TWL_LED 419 tristate "TWL4030/6030 PWM support for LED drivers" 420 depends on TWL4030_CORE 421 help 422 Generic PWM framework driver for TWL4030/6030 LED terminals. 423 424 To compile this driver as a module, choose M here: the module 425 will be called pwm-twl-led. 426 427config PWM_VT8500 428 tristate "vt8500 PWM support" 429 depends on ARCH_VT8500 430 help 431 Generic PWM framework driver for vt8500. 432 433 To compile this driver as a module, choose M here: the module 434 will be called pwm-vt8500. 435 436endif 437