1 # SPDX-License-Identifier: GPL-2.0-only 2 # 3 # Platform support for Chrome OS hardware (Chromebooks and Chromeboxes) 4 # 5 6 menuconfig CHROME_PLATFORMS 7 bool "Platform support for Chrome hardware" 8 depends on X86 || ARM || ARM64 || COMPILE_TEST 9 help 10 Say Y here to get to see options for platform support for 11 various Chromebooks and Chromeboxes. This option alone does 12 not add any kernel code. 13 14 If you say N, all options in this submenu will be skipped and disabled. 15 16 if CHROME_PLATFORMS 17 18 config CHROMEOS_ACPI 19 tristate "ChromeOS specific ACPI extensions" 20 depends on ACPI 21 help 22 This driver provides the firmware interface for the services 23 exported through the ChromeOS interfaces when using ChromeOS 24 ACPI firmware. 25 26 If you have an ACPI-compatible Chromebook, say Y or M here. 27 The module will be called chromeos_acpi. 28 29 config CHROMEOS_LAPTOP 30 tristate "Chrome OS Laptop" 31 depends on I2C && DMI && X86 32 help 33 This driver instantiates i2c and smbus devices such as 34 light sensors and touchpads. 35 36 If you have a supported Chromebook, choose Y or M here. 37 The module will be called chromeos_laptop. 38 39 config CHROMEOS_PSTORE 40 tristate "Chrome OS pstore support" 41 depends on X86 42 help 43 This module instantiates the persistent storage on x86 ChromeOS 44 devices. It can be used to store away console logs and crash 45 information across reboots. 46 47 The range of memory used is 0xf00000-0x1000000, traditionally 48 the memory used to back VGA controller memory. 49 50 If you have a supported Chromebook, choose Y or M here. 51 The module will be called chromeos_pstore. 52 53 config CHROMEOS_TBMC 54 tristate "ChromeOS Tablet Switch Controller" 55 depends on ACPI 56 depends on INPUT 57 help 58 This option adds a driver for the tablet switch on 59 select Chrome OS systems. 60 61 To compile this driver as a module, choose M here: the 62 module will be called chromeos_tbmc. 63 64 config CROS_EC 65 tristate "ChromeOS Embedded Controller" 66 select CROS_EC_PROTO 67 depends on X86 || ARM || ARM64 || COMPILE_TEST 68 help 69 If you say Y here you get support for the ChromeOS Embedded 70 Controller (EC) providing keyboard, battery and power services. 71 You also need to enable the driver for the bus you are using. The 72 protocol for talking to the EC is defined by the bus driver. 73 74 To compile this driver as a module, choose M here: the 75 module will be called cros_ec. 76 77 config CROS_EC_I2C 78 tristate "ChromeOS Embedded Controller (I2C)" 79 depends on CROS_EC && I2C 80 81 help 82 If you say Y here, you get support for talking to the ChromeOS 83 EC through an I2C bus. This uses a simple byte-level protocol with 84 a checksum. Failing accesses will be retried three times to 85 improve reliability. 86 87 config CROS_EC_RPMSG 88 tristate "ChromeOS Embedded Controller (rpmsg)" 89 depends on CROS_EC && RPMSG && OF 90 help 91 If you say Y here, you get support for talking to the ChromeOS EC 92 through rpmsg. This uses a simple byte-level protocol with a 93 checksum. Also since there's no addition EC-to-host interrupt, this 94 use a byte in message to distinguish host event from host command. 95 96 To compile this driver as a module, choose M here: the 97 module will be called cros_ec_rpmsg. 98 99 config CROS_EC_ISHTP 100 tristate "ChromeOS Embedded Controller (ISHTP)" 101 depends on CROS_EC 102 depends on INTEL_ISH_HID 103 help 104 If you say Y here, you get support for talking to the ChromeOS EC 105 firmware running on Intel Integrated Sensor Hub (ISH), using the 106 ISH Transport protocol (ISH-TP). This uses a simple byte-level 107 protocol with a checksum. 108 109 To compile this driver as a module, choose M here: the 110 module will be called cros_ec_ishtp. 111 112 config CROS_EC_SPI 113 tristate "ChromeOS Embedded Controller (SPI)" 114 depends on CROS_EC && SPI 115 116 help 117 If you say Y here, you get support for talking to the ChromeOS EC 118 through a SPI bus, using a byte-level protocol. Since the EC's 119 response time cannot be guaranteed, we support ignoring 120 'pre-amble' bytes before the response actually starts. 121 122 config CROS_EC_UART 123 tristate "ChromeOS Embedded Controller (UART)" 124 depends on CROS_EC && ACPI && SERIAL_DEV_BUS 125 help 126 If you say Y here, you get support for talking to the ChromeOS EC 127 through a UART, using a byte-level protocol. 128 129 To compile this driver as a module, choose M here: the 130 module will be called cros_ec_uart. 131 132 config CROS_EC_LPC 133 tristate "ChromeOS Embedded Controller (LPC)" 134 depends on CROS_EC && ACPI && (X86 || COMPILE_TEST) 135 depends on HAS_IOPORT 136 help 137 If you say Y here, you get support for talking to the ChromeOS EC 138 over an LPC bus, including the LPC Microchip EC (MEC) variant. 139 This uses a simple byte-level protocol with a checksum. This is 140 used for userspace access only. The kernel typically has its own 141 communication methods. 142 143 To compile this driver as a module, choose M here: the 144 module will be called cros_ec_lpcs. 145 146 config CROS_EC_PROTO 147 bool 148 help 149 ChromeOS EC communication protocol helpers. 150 151 config CROS_KBD_LED_BACKLIGHT 152 tristate "Backlight LED support for Chrome OS keyboards" 153 depends on LEDS_CLASS && (ACPI || CROS_EC || MFD_CROS_EC_DEV) 154 help 155 This option enables support for the keyboard backlight LEDs on 156 select Chrome OS systems. 157 158 To compile this driver as a module, choose M here: the 159 module will be called cros_kbd_led_backlight. 160 161 config CROS_EC_CHARDEV 162 tristate "ChromeOS EC miscdevice" 163 depends on MFD_CROS_EC_DEV 164 default MFD_CROS_EC_DEV 165 help 166 This driver adds file operations support to talk with the 167 ChromeOS EC from userspace via a character device. 168 169 To compile this driver as a module, choose M here: the 170 module will be called cros_ec_chardev. 171 172 config CROS_EC_LIGHTBAR 173 tristate "Chromebook Pixel's lightbar support" 174 depends on MFD_CROS_EC_DEV 175 default MFD_CROS_EC_DEV 176 help 177 This option exposes the Chromebook Pixel's lightbar to 178 userspace. 179 180 To compile this driver as a module, choose M here: the 181 module will be called cros_ec_lightbar. 182 183 config CROS_EC_VBC 184 tristate "ChromeOS EC vboot context support" 185 depends on MFD_CROS_EC_DEV && OF 186 default MFD_CROS_EC_DEV 187 help 188 This option exposes the ChromeOS EC vboot context nvram to 189 userspace. 190 191 To compile this driver as a module, choose M here: the 192 module will be called cros_ec_vbc. 193 194 config CROS_EC_DEBUGFS 195 tristate "Export ChromeOS EC internals in DebugFS" 196 depends on MFD_CROS_EC_DEV && DEBUG_FS 197 default MFD_CROS_EC_DEV 198 help 199 This option exposes the ChromeOS EC device internals to 200 userspace. 201 202 To compile this driver as a module, choose M here: the 203 module will be called cros_ec_debugfs. 204 205 config CROS_EC_SENSORHUB 206 tristate "ChromeOS EC MEMS Sensor Hub" 207 depends on MFD_CROS_EC_DEV 208 default MFD_CROS_EC_DEV 209 help 210 Allow loading IIO sensors. This driver is loaded by MFD and will in 211 turn query the EC and register the sensors. 212 It also spreads the sensor data coming from the EC to the IIO sensor 213 object. 214 215 To compile this driver as a module, choose M here: the 216 module will be called cros_ec_sensorhub. 217 218 config CROS_EC_SYSFS 219 tristate "ChromeOS EC control and information through sysfs" 220 depends on MFD_CROS_EC_DEV && SYSFS 221 default MFD_CROS_EC_DEV 222 help 223 This option exposes some sysfs attributes to control and get 224 information from ChromeOS EC. 225 226 To compile this driver as a module, choose M here: the 227 module will be called cros_ec_sysfs. 228 229 config CROS_EC_TYPEC 230 tristate "ChromeOS EC Type-C Connector Control" 231 depends on MFD_CROS_EC_DEV && TYPEC 232 depends on CROS_USBPD_NOTIFY 233 depends on USB_ROLE_SWITCH 234 default MFD_CROS_EC_DEV 235 help 236 If you say Y here, you get support for accessing Type C connector 237 information from the Chrome OS EC. 238 239 To compile this driver as a module, choose M here: the module will be 240 called cros-ec-typec. 241 242 config CROS_HPS_I2C 243 tristate "ChromeOS HPS device" 244 depends on HID && I2C && PM 245 help 246 Say Y here if you want to enable support for the ChromeOS 247 human presence sensor (HPS), attached via I2C. The driver supports a 248 sensor connected to the I2C bus and exposes it as a character device. 249 To save power, the sensor is automatically powered down when no 250 clients are accessing it. 251 252 config CROS_USBPD_LOGGER 253 tristate "Logging driver for USB PD charger" 254 depends on CHARGER_CROS_USBPD 255 default y 256 select RTC_LIB 257 help 258 This option enables support for logging event data for the USB PD charger 259 available in the Embedded Controller on ChromeOS systems. 260 261 To compile this driver as a module, choose M here: the 262 module will be called cros_usbpd_logger. 263 264 config CROS_USBPD_NOTIFY 265 tristate "ChromeOS Type-C power delivery event notifier" 266 depends on MFD_CROS_EC_DEV 267 default MFD_CROS_EC_DEV 268 help 269 If you say Y here, you get support for Type-C PD event notifications 270 from the ChromeOS EC. On ACPI platorms this driver will bind to the 271 GOOG0003 ACPI device, and on platforms which don't have this device it 272 will get initialized on ECs which support the feature 273 EC_FEATURE_USB_PD. 274 275 To compile this driver as a module, choose M here: the 276 module will be called cros_usbpd_notify. 277 278 config CHROMEOS_PRIVACY_SCREEN 279 tristate "ChromeOS Privacy Screen support" 280 depends on ACPI 281 depends on DRM 282 select DRM_PRIVACY_SCREEN 283 help 284 This driver provides the support needed for the in-built electronic 285 privacy screen that is present on some ChromeOS devices. When enabled, 286 this should probably always be built into the kernel to avoid or 287 minimize drm probe deferral. 288 289 config CROS_TYPEC_SWITCH 290 tristate "ChromeOS EC Type-C Switch Control" 291 depends on MFD_CROS_EC_DEV && TYPEC && ACPI 292 default MFD_CROS_EC_DEV 293 help 294 If you say Y here, you get support for configuring the ChromeOS EC Type-C 295 muxes and retimers. 296 297 To compile this driver as a module, choose M here: the module will be 298 called cros_typec_switch. 299 300 source "drivers/platform/chrome/wilco_ec/Kconfig" 301 302 # Kunit test cases 303 config CROS_KUNIT_EC_PROTO_TEST 304 tristate "Kunit tests for ChromeOS EC protocol" if !KUNIT_ALL_TESTS 305 depends on KUNIT && CROS_EC 306 default KUNIT_ALL_TESTS 307 select CROS_EC_PROTO 308 help 309 Kunit tests for ChromeOS EC protocol. 310 311 endif # CHROMEOS_PLATFORMS 312