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_EP93XX 115 tristate "Cirrus Logic EP93xx PWM support" 116 depends on ARCH_EP93XX 117 help 118 Generic PWM framework driver for Cirrus Logic EP93xx. 119 120 To compile this driver as a module, choose M here: the module 121 will be called pwm-ep93xx. 122 123config PWM_FSL_FTM 124 tristate "Freescale FlexTimer Module (FTM) PWM support" 125 depends on OF 126 select REGMAP_MMIO 127 help 128 Generic FTM PWM framework driver for Freescale VF610 and 129 Layerscape LS-1 SoCs. 130 131 To compile this driver as a module, choose M here: the module 132 will be called pwm-fsl-ftm. 133 134config PWM_IMG 135 tristate "Imagination Technologies PWM driver" 136 depends on HAS_IOMEM 137 depends on MFD_SYSCON 138 depends on COMMON_CLK 139 depends on MIPS || COMPILE_TEST 140 help 141 Generic PWM framework driver for Imagination Technologies 142 PWM block which supports 4 channels. 143 144 To compile this driver as a module, choose M here: the module 145 will be called pwm-img 146 147config PWM_IMX 148 tristate "i.MX PWM support" 149 depends on ARCH_MXC 150 help 151 Generic PWM framework driver for i.MX. 152 153 To compile this driver as a module, choose M here: the module 154 will be called pwm-imx. 155 156config PWM_JZ4740 157 tristate "Ingenic JZ4740 PWM support" 158 depends on MACH_JZ4740 159 help 160 Generic PWM framework driver for Ingenic JZ4740 based 161 machines. 162 163 To compile this driver as a module, choose M here: the module 164 will be called pwm-jz4740. 165 166config PWM_LP3943 167 tristate "TI/National Semiconductor LP3943 PWM support" 168 depends on MFD_LP3943 169 help 170 Generic PWM framework driver for LP3943 which supports two PWM 171 channels. 172 173 To compile this driver as a module, choose M here: the module 174 will be called pwm-lp3943. 175 176config PWM_LPC32XX 177 tristate "LPC32XX PWM support" 178 depends on ARCH_LPC32XX 179 help 180 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 181 PWM controllers. 182 183 To compile this driver as a module, choose M here: the module 184 will be called pwm-lpc32xx. 185 186config PWM_LPSS 187 tristate "Intel LPSS PWM support" 188 depends on X86 189 help 190 Generic PWM framework driver for Intel Low Power Subsystem PWM 191 controller. 192 193 To compile this driver as a module, choose M here: the module 194 will be called pwm-lpss. 195 196config PWM_LPSS_PCI 197 tristate "Intel LPSS PWM PCI driver" 198 depends on PWM_LPSS && PCI 199 help 200 The PCI driver for Intel Low Power Subsystem PWM controller. 201 202 To compile this driver as a module, choose M here: the module 203 will be called pwm-lpss-pci. 204 205config PWM_LPSS_PLATFORM 206 tristate "Intel LPSS PWM platform driver" 207 depends on PWM_LPSS && ACPI 208 help 209 The platform driver for Intel Low Power Subsystem PWM controller. 210 211 To compile this driver as a module, choose M here: the module 212 will be called pwm-lpss-platform. 213 214config PWM_MXS 215 tristate "Freescale MXS PWM support" 216 depends on ARCH_MXS && OF 217 select STMP_DEVICE 218 help 219 Generic PWM framework driver for Freescale MXS. 220 221 To compile this driver as a module, choose M here: the module 222 will be called pwm-mxs. 223 224config PWM_PCA9685 225 tristate "NXP PCA9685 PWM driver" 226 depends on OF && I2C 227 select REGMAP_I2C 228 help 229 Generic PWM framework driver for NXP PCA9685 LED controller. 230 231 To compile this driver as a module, choose M here: the module 232 will be called pwm-pca9685. 233 234config PWM_PUV3 235 tristate "PKUnity NetBook-0916 PWM support" 236 depends on ARCH_PUV3 237 help 238 Generic PWM framework driver for PKUnity NetBook-0916. 239 240 To compile this driver as a module, choose M here: the module 241 will be called pwm-puv3. 242 243config PWM_PXA 244 tristate "PXA PWM support" 245 depends on ARCH_PXA 246 help 247 Generic PWM framework driver for PXA. 248 249 To compile this driver as a module, choose M here: the module 250 will be called pwm-pxa. 251 252config PWM_RENESAS_TPU 253 tristate "Renesas TPU PWM support" 254 depends on ARCH_SHMOBILE || COMPILE_TEST 255 depends on HAS_IOMEM 256 help 257 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 258 in Renesas chips through the PWM API. 259 260 To compile this driver as a module, choose M here: the module 261 will be called pwm-renesas-tpu. 262 263config PWM_ROCKCHIP 264 tristate "Rockchip PWM support" 265 depends on ARCH_ROCKCHIP 266 help 267 Generic PWM framework driver for the PWM controller found on 268 Rockchip SoCs. 269 270config PWM_SAMSUNG 271 tristate "Samsung PWM support" 272 depends on PLAT_SAMSUNG || ARCH_EXYNOS 273 help 274 Generic PWM framework driver for Samsung. 275 276 To compile this driver as a module, choose M here: the module 277 will be called pwm-samsung. 278 279config PWM_SPEAR 280 tristate "STMicroelectronics SPEAr PWM support" 281 depends on PLAT_SPEAR 282 depends on OF 283 help 284 Generic PWM framework driver for the PWM controller on ST 285 SPEAr SoCs. 286 287 To compile this driver as a module, choose M here: the module 288 will be called pwm-spear. 289 290config PWM_STI 291 tristate "STiH4xx PWM support" 292 depends on ARCH_STI 293 depends on OF 294 help 295 Generic PWM framework driver for STiH4xx SoCs. 296 297 To compile this driver as a module, choose M here: the module 298 will be called pwm-sti. 299 300config PWM_SUN4I 301 tristate "Allwinner PWM support" 302 depends on ARCH_SUNXI || COMPILE_TEST 303 depends on HAS_IOMEM && COMMON_CLK 304 help 305 Generic PWM framework driver for Allwinner SoCs. 306 307 To compile this driver as a module, choose M here: the module 308 will be called pwm-sun4i. 309 310config PWM_TEGRA 311 tristate "NVIDIA Tegra PWM support" 312 depends on ARCH_TEGRA 313 help 314 Generic PWM framework driver for the PWFM controller found on NVIDIA 315 Tegra SoCs. 316 317 To compile this driver as a module, choose M here: the module 318 will be called pwm-tegra. 319 320config PWM_TIECAP 321 tristate "ECAP PWM support" 322 depends on SOC_AM33XX || ARCH_DAVINCI_DA8XX 323 help 324 PWM driver support for the ECAP APWM controller found on AM33XX 325 TI SOC 326 327 To compile this driver as a module, choose M here: the module 328 will be called pwm-tiecap. 329 330config PWM_TIEHRPWM 331 tristate "EHRPWM PWM support" 332 depends on SOC_AM33XX || ARCH_DAVINCI_DA8XX 333 help 334 PWM driver support for the EHRPWM controller found on AM33XX 335 TI SOC 336 337 To compile this driver as a module, choose M here: the module 338 will be called pwm-tiehrpwm. 339 340config PWM_TIPWMSS 341 bool 342 default y if SOC_AM33XX && (PWM_TIECAP || PWM_TIEHRPWM) 343 help 344 PWM Subsystem driver support for AM33xx SOC. 345 346 PWM submodules require PWM config space access from submodule 347 drivers and require common parent driver support. 348 349config PWM_TWL 350 tristate "TWL4030/6030 PWM support" 351 depends on TWL4030_CORE 352 help 353 Generic PWM framework driver for TWL4030/6030. 354 355 To compile this driver as a module, choose M here: the module 356 will be called pwm-twl. 357 358config PWM_TWL_LED 359 tristate "TWL4030/6030 PWM support for LED drivers" 360 depends on TWL4030_CORE 361 help 362 Generic PWM framework driver for TWL4030/6030 LED terminals. 363 364 To compile this driver as a module, choose M here: the module 365 will be called pwm-twl-led. 366 367config PWM_VT8500 368 tristate "vt8500 PWM support" 369 depends on ARCH_VT8500 370 help 371 Generic PWM framework driver for vt8500. 372 373 To compile this driver as a module, choose M here: the module 374 will be called pwm-vt8500. 375 376endif 377