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_TCB 45 tristate "Atmel TC Block PWM support" 46 depends on ATMEL_TCLIB && OF 47 help 48 Generic PWM framework driver for Atmel Timer Counter Block. 49 50 A Timer Counter Block provides 6 PWM devices grouped by 2. 51 Devices in a given group must have the same period. 52 53 To compile this driver as a module, choose M here: the module 54 will be called pwm-atmel-tcb. 55 56config PWM_BFIN 57 tristate "Blackfin PWM support" 58 depends on BFIN_GPTIMERS 59 help 60 Generic PWM framework driver for Blackfin. 61 62 To compile this driver as a module, choose M here: the module 63 will be called pwm-bfin. 64 65config PWM_EP93XX 66 tristate "Cirrus Logic EP93xx PWM support" 67 depends on ARCH_EP93XX 68 help 69 Generic PWM framework driver for Cirrus Logic EP93xx. 70 71 To compile this driver as a module, choose M here: the module 72 will be called pwm-ep93xx. 73 74config PWM_IMX 75 tristate "i.MX PWM support" 76 depends on ARCH_MXC 77 help 78 Generic PWM framework driver for i.MX. 79 80 To compile this driver as a module, choose M here: the module 81 will be called pwm-imx. 82 83config PWM_JZ4740 84 tristate "Ingenic JZ4740 PWM support" 85 depends on MACH_JZ4740 86 help 87 Generic PWM framework driver for Ingenic JZ4740 based 88 machines. 89 90 To compile this driver as a module, choose M here: the module 91 will be called pwm-jz4740. 92 93config PWM_LPC32XX 94 tristate "LPC32XX PWM support" 95 depends on ARCH_LPC32XX 96 help 97 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 98 PWM controllers. 99 100 To compile this driver as a module, choose M here: the module 101 will be called pwm-lpc32xx. 102 103config PWM_MXS 104 tristate "Freescale MXS PWM support" 105 depends on ARCH_MXS && OF 106 select STMP_DEVICE 107 help 108 Generic PWM framework driver for Freescale MXS. 109 110 To compile this driver as a module, choose M here: the module 111 will be called pwm-mxs. 112 113config PWM_PCA9685 114 tristate "NXP PCA9685 PWM driver" 115 depends on OF && REGMAP_I2C 116 help 117 Generic PWM framework driver for NXP PCA9685 LED controller. 118 119 To compile this driver as a module, choose M here: the module 120 will be called pwm-pca9685. 121 122config PWM_PUV3 123 tristate "PKUnity NetBook-0916 PWM support" 124 depends on ARCH_PUV3 125 help 126 Generic PWM framework driver for PKUnity NetBook-0916. 127 128 To compile this driver as a module, choose M here: the module 129 will be called pwm-puv3. 130 131config PWM_PXA 132 tristate "PXA PWM support" 133 depends on ARCH_PXA 134 help 135 Generic PWM framework driver for PXA. 136 137 To compile this driver as a module, choose M here: the module 138 will be called pwm-pxa. 139 140config PWM_RENESAS_TPU 141 tristate "Renesas TPU PWM support" 142 depends on ARCH_SHMOBILE 143 help 144 This driver exposes the Timer Pulse Unit (TPU) PWM controller found 145 in Renesas chips through the PWM API. 146 147 To compile this driver as a module, choose M here: the module 148 will be called pwm-renesas-tpu. 149 150config PWM_SAMSUNG 151 tristate "Samsung PWM support" 152 depends on PLAT_SAMSUNG 153 help 154 Generic PWM framework driver for Samsung. 155 156 To compile this driver as a module, choose M here: the module 157 will be called pwm-samsung. 158 159config PWM_SPEAR 160 tristate "STMicroelectronics SPEAr PWM support" 161 depends on PLAT_SPEAR 162 depends on OF 163 help 164 Generic PWM framework driver for the PWM controller on ST 165 SPEAr SoCs. 166 167 To compile this driver as a module, choose M here: the module 168 will be called pwm-spear. 169 170config PWM_TEGRA 171 tristate "NVIDIA Tegra PWM support" 172 depends on ARCH_TEGRA 173 help 174 Generic PWM framework driver for the PWFM controller found on NVIDIA 175 Tegra SoCs. 176 177 To compile this driver as a module, choose M here: the module 178 will be called pwm-tegra. 179 180config PWM_TIECAP 181 tristate "ECAP PWM support" 182 depends on SOC_AM33XX || ARCH_DAVINCI_DA8XX 183 help 184 PWM driver support for the ECAP APWM controller found on AM33XX 185 TI SOC 186 187 To compile this driver as a module, choose M here: the module 188 will be called pwm-tiecap. 189 190config PWM_TIEHRPWM 191 tristate "EHRPWM PWM support" 192 depends on SOC_AM33XX || ARCH_DAVINCI_DA8XX 193 help 194 PWM driver support for the EHRPWM controller found on AM33XX 195 TI SOC 196 197 To compile this driver as a module, choose M here: the module 198 will be called pwm-tiehrpwm. 199 200config PWM_TIPWMSS 201 bool 202 default y if SOC_AM33XX && (PWM_TIECAP || PWM_TIEHRPWM) 203 help 204 PWM Subsystem driver support for AM33xx SOC. 205 206 PWM submodules require PWM config space access from submodule 207 drivers and require common parent driver support. 208 209config PWM_TWL 210 tristate "TWL4030/6030 PWM support" 211 depends on TWL4030_CORE 212 help 213 Generic PWM framework driver for TWL4030/6030. 214 215 To compile this driver as a module, choose M here: the module 216 will be called pwm-twl. 217 218config PWM_TWL_LED 219 tristate "TWL4030/6030 PWM support for LED drivers" 220 depends on TWL4030_CORE 221 help 222 Generic PWM framework driver for TWL4030/6030 LED terminals. 223 224 To compile this driver as a module, choose M here: the module 225 will be called pwm-twl-led. 226 227config PWM_VT8500 228 tristate "vt8500 PWM support" 229 depends on ARCH_VT8500 230 help 231 Generic PWM framework driver for vt8500. 232 233 To compile this driver as a module, choose M here: the module 234 will be called pwm-vt8500. 235 236endif 237