| 1 | menuconfig 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 | |
| 29 | if PWM |
| 30 | |
| 31 | config PWM_SYSFS |
| 32 | bool |
| 33 | default y if SYSFS |
| 34 | |
| 35 | config 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 | |
| 44 | config 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 | |
| 53 | config 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 | |
| 65 | config 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 | |
| 77 | config 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 | |
| 86 | config 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 | |
| 95 | config 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 | |
| 104 | config 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 | |
| 114 | config 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 | |
| 121 | config 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 | |
| 130 | config 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 | |
| 141 | config 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 | |
| 154 | config 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 | |
| 163 | config 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 | |
| 173 | config 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 | |
| 183 | config PWM_LPC32XX |
| 184 | tristate "LPC32XX PWM support" |
| 185 | depends on ARCH_LPC32XX |
| 186 | help |
| 187 | Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two |
| 188 | PWM controllers. |
| 189 | |
| 190 | To compile this driver as a module, choose M here: the module |
| 191 | will be called pwm-lpc32xx. |
| 192 | |
| 193 | config PWM_LPSS |
| 194 | tristate "Intel LPSS PWM support" |
| 195 | depends on X86 |
| 196 | help |
| 197 | Generic PWM framework driver for Intel Low Power Subsystem PWM |
| 198 | controller. |
| 199 | |
| 200 | To compile this driver as a module, choose M here: the module |
| 201 | will be called pwm-lpss. |
| 202 | |
| 203 | config PWM_LPSS_PCI |
| 204 | tristate "Intel LPSS PWM PCI driver" |
| 205 | depends on PWM_LPSS && PCI |
| 206 | help |
| 207 | The PCI driver for Intel Low Power Subsystem PWM controller. |
| 208 | |
| 209 | To compile this driver as a module, choose M here: the module |
| 210 | will be called pwm-lpss-pci. |
| 211 | |
| 212 | config PWM_LPSS_PLATFORM |
| 213 | tristate "Intel LPSS PWM platform driver" |
| 214 | depends on PWM_LPSS && ACPI |
| 215 | help |
| 216 | The platform driver for Intel Low Power Subsystem PWM controller. |
| 217 | |
| 218 | To compile this driver as a module, choose M here: the module |
| 219 | will be called pwm-lpss-platform. |
| 220 | |
| 221 | config PWM_MXS |
| 222 | tristate "Freescale MXS PWM support" |
| 223 | depends on ARCH_MXS && OF |
| 224 | select STMP_DEVICE |
| 225 | help |
| 226 | Generic PWM framework driver for Freescale MXS. |
| 227 | |
| 228 | To compile this driver as a module, choose M here: the module |
| 229 | will be called pwm-mxs. |
| 230 | |
| 231 | config PWM_PCA9685 |
| 232 | tristate "NXP PCA9685 PWM driver" |
| 233 | depends on OF && I2C |
| 234 | select REGMAP_I2C |
| 235 | help |
| 236 | Generic PWM framework driver for NXP PCA9685 LED controller. |
| 237 | |
| 238 | To compile this driver as a module, choose M here: the module |
| 239 | will be called pwm-pca9685. |
| 240 | |
| 241 | config PWM_PUV3 |
| 242 | tristate "PKUnity NetBook-0916 PWM support" |
| 243 | depends on ARCH_PUV3 |
| 244 | help |
| 245 | Generic PWM framework driver for PKUnity NetBook-0916. |
| 246 | |
| 247 | To compile this driver as a module, choose M here: the module |
| 248 | will be called pwm-puv3. |
| 249 | |
| 250 | config PWM_PXA |
| 251 | tristate "PXA PWM support" |
| 252 | depends on ARCH_PXA |
| 253 | help |
| 254 | Generic PWM framework driver for PXA. |
| 255 | |
| 256 | To compile this driver as a module, choose M here: the module |
| 257 | will be called pwm-pxa. |
| 258 | |
| 259 | config PWM_RENESAS_TPU |
| 260 | tristate "Renesas TPU PWM support" |
| 261 | depends on ARCH_SHMOBILE || COMPILE_TEST |
| 262 | depends on HAS_IOMEM |
| 263 | help |
| 264 | This driver exposes the Timer Pulse Unit (TPU) PWM controller found |
| 265 | in Renesas chips through the PWM API. |
| 266 | |
| 267 | To compile this driver as a module, choose M here: the module |
| 268 | will be called pwm-renesas-tpu. |
| 269 | |
| 270 | config PWM_ROCKCHIP |
| 271 | tristate "Rockchip PWM support" |
| 272 | depends on ARCH_ROCKCHIP |
| 273 | help |
| 274 | Generic PWM framework driver for the PWM controller found on |
| 275 | Rockchip SoCs. |
| 276 | |
| 277 | config PWM_SAMSUNG |
| 278 | tristate "Samsung PWM support" |
| 279 | depends on PLAT_SAMSUNG || ARCH_EXYNOS |
| 280 | help |
| 281 | Generic PWM framework driver for Samsung. |
| 282 | |
| 283 | To compile this driver as a module, choose M here: the module |
| 284 | will be called pwm-samsung. |
| 285 | |
| 286 | config PWM_SPEAR |
| 287 | tristate "STMicroelectronics SPEAr PWM support" |
| 288 | depends on PLAT_SPEAR |
| 289 | depends on OF |
| 290 | help |
| 291 | Generic PWM framework driver for the PWM controller on ST |
| 292 | SPEAr SoCs. |
| 293 | |
| 294 | To compile this driver as a module, choose M here: the module |
| 295 | will be called pwm-spear. |
| 296 | |
| 297 | config PWM_STI |
| 298 | tristate "STiH4xx PWM support" |
| 299 | depends on ARCH_STI |
| 300 | depends on OF |
| 301 | help |
| 302 | Generic PWM framework driver for STiH4xx SoCs. |
| 303 | |
| 304 | To compile this driver as a module, choose M here: the module |
| 305 | will be called pwm-sti. |
| 306 | |
| 307 | config PWM_SUN4I |
| 308 | tristate "Allwinner PWM support" |
| 309 | depends on ARCH_SUNXI || COMPILE_TEST |
| 310 | depends on HAS_IOMEM && COMMON_CLK |
| 311 | help |
| 312 | Generic PWM framework driver for Allwinner SoCs. |
| 313 | |
| 314 | To compile this driver as a module, choose M here: the module |
| 315 | will be called pwm-sun4i. |
| 316 | |
| 317 | config PWM_TEGRA |
| 318 | tristate "NVIDIA Tegra PWM support" |
| 319 | depends on ARCH_TEGRA |
| 320 | help |
| 321 | Generic PWM framework driver for the PWFM controller found on NVIDIA |
| 322 | Tegra SoCs. |
| 323 | |
| 324 | To compile this driver as a module, choose M here: the module |
| 325 | will be called pwm-tegra. |
| 326 | |
| 327 | config PWM_TIECAP |
| 328 | tristate "ECAP PWM support" |
| 329 | depends on SOC_AM33XX || ARCH_DAVINCI_DA8XX |
| 330 | help |
| 331 | PWM driver support for the ECAP APWM controller found on AM33XX |
| 332 | TI SOC |
| 333 | |
| 334 | To compile this driver as a module, choose M here: the module |
| 335 | will be called pwm-tiecap. |
| 336 | |
| 337 | config PWM_TIEHRPWM |
| 338 | tristate "EHRPWM PWM support" |
| 339 | depends on SOC_AM33XX || ARCH_DAVINCI_DA8XX |
| 340 | help |
| 341 | PWM driver support for the EHRPWM controller found on AM33XX |
| 342 | TI SOC |
| 343 | |
| 344 | To compile this driver as a module, choose M here: the module |
| 345 | will be called pwm-tiehrpwm. |
| 346 | |
| 347 | config PWM_TIPWMSS |
| 348 | bool |
| 349 | default y if SOC_AM33XX && (PWM_TIECAP || PWM_TIEHRPWM) |
| 350 | help |
| 351 | PWM Subsystem driver support for AM33xx SOC. |
| 352 | |
| 353 | PWM submodules require PWM config space access from submodule |
| 354 | drivers and require common parent driver support. |
| 355 | |
| 356 | config PWM_TWL |
| 357 | tristate "TWL4030/6030 PWM support" |
| 358 | depends on TWL4030_CORE |
| 359 | help |
| 360 | Generic PWM framework driver for TWL4030/6030. |
| 361 | |
| 362 | To compile this driver as a module, choose M here: the module |
| 363 | will be called pwm-twl. |
| 364 | |
| 365 | config PWM_TWL_LED |
| 366 | tristate "TWL4030/6030 PWM support for LED drivers" |
| 367 | depends on TWL4030_CORE |
| 368 | help |
| 369 | Generic PWM framework driver for TWL4030/6030 LED terminals. |
| 370 | |
| 371 | To compile this driver as a module, choose M here: the module |
| 372 | will be called pwm-twl-led. |
| 373 | |
| 374 | config PWM_VT8500 |
| 375 | tristate "vt8500 PWM support" |
| 376 | depends on ARCH_VT8500 |
| 377 | help |
| 378 | Generic PWM framework driver for vt8500. |
| 379 | |
| 380 | To compile this driver as a module, choose M here: the module |
| 381 | will be called pwm-vt8500. |
| 382 | |
| 383 | endif |