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_AB8500 32 tristate "AB8500 PWM support" 33 depends on AB8500_CORE && ARCH_U8500 34 help 35 Generic PWM framework driver for Analog Baseband AB8500. 36 37 To compile this driver as a module, choose M here: the module 38 will be called pwm-ab8500. 39 40config PWM_ATMEL_TCB 41 tristate "Atmel TC Block PWM support" 42 depends on ATMEL_TCLIB && OF 43 help 44 Generic PWM framework driver for Atmel Timer Counter Block. 45 46 A Timer Counter Block provides 6 PWM devices grouped by 2. 47 Devices in a given group must have the same period. 48 49 To compile this driver as a module, choose M here: the module 50 will be called pwm-atmel-tcb. 51 52config PWM_BFIN 53 tristate "Blackfin PWM support" 54 depends on BFIN_GPTIMERS 55 help 56 Generic PWM framework driver for Blackfin. 57 58 To compile this driver as a module, choose M here: the module 59 will be called pwm-bfin. 60 61config PWM_IMX 62 tristate "i.MX PWM support" 63 depends on ARCH_MXC 64 help 65 Generic PWM framework driver for i.MX. 66 67 To compile this driver as a module, choose M here: the module 68 will be called pwm-imx. 69 70config PWM_JZ4740 71 tristate "Ingenic JZ4740 PWM support" 72 depends on MACH_JZ4740 73 help 74 Generic PWM framework driver for Ingenic JZ4740 based 75 machines. 76 77 To compile this driver as a module, choose M here: the module 78 will be called pwm-jz4740. 79 80config PWM_LPC32XX 81 tristate "LPC32XX PWM support" 82 depends on ARCH_LPC32XX 83 help 84 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 85 PWM controllers. 86 87 To compile this driver as a module, choose M here: the module 88 will be called pwm-lpc32xx. 89 90config PWM_MXS 91 tristate "Freescale MXS PWM support" 92 depends on ARCH_MXS && OF 93 select STMP_DEVICE 94 help 95 Generic PWM framework driver for Freescale MXS. 96 97 To compile this driver as a module, choose M here: the module 98 will be called pwm-mxs. 99 100config PWM_PUV3 101 tristate "PKUnity NetBook-0916 PWM support" 102 depends on ARCH_PUV3 103 help 104 Generic PWM framework driver for PKUnity NetBook-0916. 105 106 To compile this driver as a module, choose M here: the module 107 will be called pwm-puv3. 108 109config PWM_PXA 110 tristate "PXA PWM support" 111 depends on ARCH_PXA 112 help 113 Generic PWM framework driver for PXA. 114 115 To compile this driver as a module, choose M here: the module 116 will be called pwm-pxa. 117 118config PWM_SAMSUNG 119 tristate "Samsung PWM support" 120 depends on PLAT_SAMSUNG 121 help 122 Generic PWM framework driver for Samsung. 123 124 To compile this driver as a module, choose M here: the module 125 will be called pwm-samsung. 126 127config PWM_SPEAR 128 tristate "STMicroelectronics SPEAr PWM support" 129 depends on PLAT_SPEAR 130 depends on OF 131 help 132 Generic PWM framework driver for the PWM controller on ST 133 SPEAr SoCs. 134 135 To compile this driver as a module, choose M here: the module 136 will be called pwm-spear. 137 138config PWM_TEGRA 139 tristate "NVIDIA Tegra PWM support" 140 depends on ARCH_TEGRA 141 help 142 Generic PWM framework driver for the PWFM controller found on NVIDIA 143 Tegra SoCs. 144 145 To compile this driver as a module, choose M here: the module 146 will be called pwm-tegra. 147 148config PWM_TIECAP 149 tristate "ECAP PWM support" 150 depends on SOC_AM33XX 151 select PWM_TIPWMSS 152 help 153 PWM driver support for the ECAP APWM controller found on AM33XX 154 TI SOC 155 156 To compile this driver as a module, choose M here: the module 157 will be called pwm-tiecap. 158 159config PWM_TIEHRPWM 160 tristate "EHRPWM PWM support" 161 depends on SOC_AM33XX 162 select PWM_TIPWMSS 163 help 164 PWM driver support for the EHRPWM controller found on AM33XX 165 TI SOC 166 167 To compile this driver as a module, choose M here: the module 168 will be called pwm-tiehrpwm. 169 170config PWM_TIPWMSS 171 bool 172 depends on SOC_AM33XX && (PWM_TIEHRPWM || PWM_TIECAP) 173 help 174 PWM Subsystem driver support for AM33xx SOC. 175 176 PWM submodules require PWM config space access from submodule 177 drivers and require common parent driver support. 178 179config PWM_TWL 180 tristate "TWL4030/6030 PWM support" 181 depends on TWL4030_CORE 182 help 183 Generic PWM framework driver for TWL4030/6030. 184 185 To compile this driver as a module, choose M here: the module 186 will be called pwm-twl. 187 188config PWM_TWL_LED 189 tristate "TWL4030/6030 PWM support for LED drivers" 190 depends on TWL4030_CORE 191 help 192 Generic PWM framework driver for TWL4030/6030 LED terminals. 193 194 To compile this driver as a module, choose M here: the module 195 will be called pwm-twl-led. 196 197config PWM_VT8500 198 tristate "vt8500 PWM support" 199 depends on ARCH_VT8500 200 help 201 Generic PWM framework driver for vt8500. 202 203 To compile this driver as a module, choose M here: the module 204 will be called pwm-vt8500. 205 206endif 207