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