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_BFIN 96 tristate "Blackfin PWM support" 97 depends on BFIN_GPTIMERS 98 help 99 Generic PWM framework driver for Blackfin. 100 101 To compile this driver as a module, choose M here: the module 102 will be called pwm-bfin. 103 104config PWM_CLPS711X 105 tristate "CLPS711X PWM support" 106 depends on ARCH_CLPS711X || COMPILE_TEST 107 depends on HAS_IOMEM 108 help 109 Generic PWM framework driver for Cirrus Logic CLPS711X. 110 111 To compile this driver as a module, choose M here: the module 112 will be called pwm-clps711x. 113 114config PWM_CRC 115 bool "Intel Crystalcove (CRC) PWM support" 116 depends on X86 && INTEL_SOC_PMIC 117 help 118 Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM 119 control. 120 121config PWM_EP93XX 122 tristate "Cirrus Logic EP93xx PWM support" 123 depends on ARCH_EP93XX 124 help 125 Generic PWM framework driver for Cirrus Logic EP93xx. 126 127 To compile this driver as a module, choose M here: the module 128 will be called pwm-ep93xx. 129 130config PWM_FSL_FTM 131 tristate "Freescale FlexTimer Module (FTM) PWM support" 132 depends on OF 133 select REGMAP_MMIO 134 help 135 Generic FTM PWM framework driver for Freescale VF610 and 136 Layerscape LS-1 SoCs. 137 138 To compile this driver as a module, choose M here: the module 139 will be called pwm-fsl-ftm. 140 141config PWM_IMG 142 tristate "Imagination Technologies PWM driver" 143 depends on HAS_IOMEM 144 depends on MFD_SYSCON 145 depends on COMMON_CLK 146 depends on MIPS || COMPILE_TEST 147 help 148 Generic PWM framework driver for Imagination Technologies 149 PWM block which supports 4 channels. 150 151 To compile this driver as a module, choose M here: the module 152 will be called pwm-img 153 154config PWM_IMX 155 tristate "i.MX PWM support" 156 depends on ARCH_MXC 157 help 158 Generic PWM framework driver for i.MX. 159 160 To compile this driver as a module, choose M here: the module 161 will be called pwm-imx. 162 163config PWM_JZ4740 164 tristate "Ingenic JZ4740 PWM support" 165 depends on MACH_JZ4740 166 help 167 Generic PWM framework driver for Ingenic JZ4740 based 168 machines. 169 170 To compile this driver as a module, choose M here: the module 171 will be called pwm-jz4740. 172 173config PWM_LP3943 174 tristate "TI/National Semiconductor LP3943 PWM support" 175 depends on MFD_LP3943 176 help 177 Generic PWM framework driver for LP3943 which supports two PWM 178 channels. 179 180 To compile this driver as a module, choose M here: the module 181 will be called pwm-lp3943. 182 183config PWM_LPC18XX_SCT 184 tristate "LPC18xx/43xx PWM/SCT support" 185 depends on ARCH_LPC18XX 186 help 187 Generic PWM framework driver for NXP LPC18xx PWM/SCT which 188 supports 16 channels. 189 A maximum of 15 channels can be requested simultaneously and 190 must have the same period. 191 192 To compile this driver as a module, choose M here: the module 193 will be called pwm-lpc18xx-sct. 194 195config PWM_LPC32XX 196 tristate "LPC32XX PWM support" 197 depends on ARCH_LPC32XX 198 help 199 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 200 PWM controllers. 201 202 To compile this driver as a module, choose M here: the module 203 will be called pwm-lpc32xx. 204 205config PWM_LPSS 206 tristate "Intel LPSS PWM support" 207 depends on X86 208 help 209 Generic PWM framework driver for Intel Low Power Subsystem PWM 210 controller. 211 212 To compile this driver as a module, choose M here: the module 213 will be called pwm-lpss. 214 215config PWM_LPSS_PCI 216 tristate "Intel LPSS PWM PCI driver" 217 depends on PWM_LPSS && PCI 218 help 219 The PCI driver for Intel Low Power Subsystem PWM controller. 220 221 To compile this driver as a module, choose M here: the module 222 will be called pwm-lpss-pci. 223 224config PWM_LPSS_PLATFORM 225 tristate "Intel LPSS PWM platform driver" 226 depends on PWM_LPSS && ACPI 227 help 228 The platform driver for Intel Low Power Subsystem PWM controller. 229 230 To compile this driver as a module, choose M here: the module 231 will be called pwm-lpss-platform. 232 233config PWM_MXS 234 tristate "Freescale MXS PWM support" 235 depends on ARCH_MXS && OF 236 select STMP_DEVICE 237 help 238 Generic PWM framework driver for Freescale MXS. 239 240 To compile this driver as a module, choose M here: the module 241 will be called pwm-mxs. 242 243config PWM_PCA9685 244 tristate "NXP PCA9685 PWM driver" 245 depends on OF && I2C 246 select REGMAP_I2C 247 help 248 Generic PWM framework driver for NXP PCA9685 LED controller. 249 250 To compile this driver as a module, choose M here: the module 251 will be called pwm-pca9685. 252 253config PWM_PUV3 254 tristate "PKUnity NetBook-0916 PWM support" 255 depends on ARCH_PUV3 256 help 257 Generic PWM framework driver for PKUnity NetBook-0916. 258 259 To compile this driver as a module, choose M here: the module 260 will be called pwm-puv3. 261 262config PWM_PXA 263 tristate "PXA PWM support" 264 depends on ARCH_PXA 265 help 266 Generic PWM framework driver for PXA. 267 268 To compile this driver as a module, choose M here: the module 269 will be called pwm-pxa. 270 271config PWM_RENESAS_TPU 272 tristate "Renesas TPU PWM support" 273 depends on ARCH_SHMOBILE || COMPILE_TEST 274 depends on HAS_IOMEM 275 help 276 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 277 in Renesas chips through the PWM API. 278 279 To compile this driver as a module, choose M here: the module 280 will be called pwm-renesas-tpu. 281 282config PWM_ROCKCHIP 283 tristate "Rockchip PWM support" 284 depends on ARCH_ROCKCHIP 285 help 286 Generic PWM framework driver for the PWM controller found on 287 Rockchip SoCs. 288 289config PWM_SAMSUNG 290 tristate "Samsung PWM support" 291 depends on PLAT_SAMSUNG || ARCH_EXYNOS 292 help 293 Generic PWM framework driver for Samsung. 294 295 To compile this driver as a module, choose M here: the module 296 will be called pwm-samsung. 297 298config PWM_SPEAR 299 tristate "STMicroelectronics SPEAr PWM support" 300 depends on PLAT_SPEAR 301 depends on OF 302 help 303 Generic PWM framework driver for the PWM controller on ST 304 SPEAr SoCs. 305 306 To compile this driver as a module, choose M here: the module 307 will be called pwm-spear. 308 309config PWM_STI 310 tristate "STiH4xx PWM support" 311 depends on ARCH_STI 312 depends on OF 313 help 314 Generic PWM framework driver for STiH4xx SoCs. 315 316 To compile this driver as a module, choose M here: the module 317 will be called pwm-sti. 318 319config PWM_SUN4I 320 tristate "Allwinner PWM support" 321 depends on ARCH_SUNXI || COMPILE_TEST 322 depends on HAS_IOMEM && COMMON_CLK 323 help 324 Generic PWM framework driver for Allwinner SoCs. 325 326 To compile this driver as a module, choose M here: the module 327 will be called pwm-sun4i. 328 329config PWM_TEGRA 330 tristate "NVIDIA Tegra PWM support" 331 depends on ARCH_TEGRA 332 help 333 Generic PWM framework driver for the PWFM controller found on NVIDIA 334 Tegra SoCs. 335 336 To compile this driver as a module, choose M here: the module 337 will be called pwm-tegra. 338 339config PWM_TIECAP 340 tristate "ECAP PWM support" 341 depends on SOC_AM33XX || ARCH_DAVINCI_DA8XX 342 help 343 PWM driver support for the ECAP APWM controller found on AM33XX 344 TI SOC 345 346 To compile this driver as a module, choose M here: the module 347 will be called pwm-tiecap. 348 349config PWM_TIEHRPWM 350 tristate "EHRPWM PWM support" 351 depends on SOC_AM33XX || ARCH_DAVINCI_DA8XX 352 help 353 PWM driver support for the EHRPWM controller found on AM33XX 354 TI SOC 355 356 To compile this driver as a module, choose M here: the module 357 will be called pwm-tiehrpwm. 358 359config PWM_TIPWMSS 360 bool 361 default y if SOC_AM33XX && (PWM_TIECAP || PWM_TIEHRPWM) 362 help 363 PWM Subsystem driver support for AM33xx SOC. 364 365 PWM submodules require PWM config space access from submodule 366 drivers and require common parent driver support. 367 368config PWM_TWL 369 tristate "TWL4030/6030 PWM support" 370 depends on TWL4030_CORE 371 help 372 Generic PWM framework driver for TWL4030/6030. 373 374 To compile this driver as a module, choose M here: the module 375 will be called pwm-twl. 376 377config PWM_TWL_LED 378 tristate "TWL4030/6030 PWM support for LED drivers" 379 depends on TWL4030_CORE 380 help 381 Generic PWM framework driver for TWL4030/6030 LED terminals. 382 383 To compile this driver as a module, choose M here: the module 384 will be called pwm-twl-led. 385 386config PWM_VT8500 387 tristate "vt8500 PWM support" 388 depends on ARCH_VT8500 389 help 390 Generic PWM framework driver for vt8500. 391 392 To compile this driver as a module, choose M here: the module 393 will be called pwm-vt8500. 394 395endif 396