1# SPDX-License-Identifier: GPL-2.0-only 2# 3# Platform support for Chrome OS hardware (Chromebooks and Chromeboxes) 4# 5 6menuconfig 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 16if CHROME_PLATFORMS 17 18config 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 29config 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 39config 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 53config 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 64config 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 77config 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 87config 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 99config 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 112config 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 122config 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 132config CROS_EC_LPC 133 tristate "ChromeOS Embedded Controller (LPC)" 134 depends on CROS_EC && ACPI && (X86 || COMPILE_TEST) 135 help 136 If you say Y here, you get support for talking to the ChromeOS EC 137 over an LPC bus, including the LPC Microchip EC (MEC) variant. 138 This uses a simple byte-level protocol with a checksum. This is 139 used for userspace access only. The kernel typically has its own 140 communication methods. 141 142 To compile this driver as a module, choose M here: the 143 module will be called cros_ec_lpcs. 144 145config CROS_EC_PROTO 146 bool 147 help 148 ChromeOS EC communication protocol helpers. 149 150config CROS_KBD_LED_BACKLIGHT 151 tristate "Backlight LED support for Chrome OS keyboards" 152 depends on LEDS_CLASS && (ACPI || CROS_EC) 153 help 154 This option enables support for the keyboard backlight LEDs on 155 select Chrome OS systems. 156 157 To compile this driver as a module, choose M here: the 158 module will be called cros_kbd_led_backlight. 159 160config CROS_EC_CHARDEV 161 tristate "ChromeOS EC miscdevice" 162 depends on MFD_CROS_EC_DEV 163 default MFD_CROS_EC_DEV 164 help 165 This driver adds file operations support to talk with the 166 ChromeOS EC from userspace via a character device. 167 168 To compile this driver as a module, choose M here: the 169 module will be called cros_ec_chardev. 170 171config CROS_EC_LIGHTBAR 172 tristate "Chromebook Pixel's lightbar support" 173 depends on MFD_CROS_EC_DEV 174 default MFD_CROS_EC_DEV 175 help 176 This option exposes the Chromebook Pixel's lightbar to 177 userspace. 178 179 To compile this driver as a module, choose M here: the 180 module will be called cros_ec_lightbar. 181 182config CROS_EC_VBC 183 tristate "ChromeOS EC vboot context support" 184 depends on MFD_CROS_EC_DEV && OF 185 default MFD_CROS_EC_DEV 186 help 187 This option exposes the ChromeOS EC vboot context nvram to 188 userspace. 189 190 To compile this driver as a module, choose M here: the 191 module will be called cros_ec_vbc. 192 193config CROS_EC_DEBUGFS 194 tristate "Export ChromeOS EC internals in DebugFS" 195 depends on MFD_CROS_EC_DEV && DEBUG_FS 196 default MFD_CROS_EC_DEV 197 help 198 This option exposes the ChromeOS EC device internals to 199 userspace. 200 201 To compile this driver as a module, choose M here: the 202 module will be called cros_ec_debugfs. 203 204config CROS_EC_SENSORHUB 205 tristate "ChromeOS EC MEMS Sensor Hub" 206 depends on MFD_CROS_EC_DEV 207 default MFD_CROS_EC_DEV 208 help 209 Allow loading IIO sensors. This driver is loaded by MFD and will in 210 turn query the EC and register the sensors. 211 It also spreads the sensor data coming from the EC to the IIO sensor 212 object. 213 214 To compile this driver as a module, choose M here: the 215 module will be called cros_ec_sensorhub. 216 217config CROS_EC_SYSFS 218 tristate "ChromeOS EC control and information through sysfs" 219 depends on MFD_CROS_EC_DEV && SYSFS 220 default MFD_CROS_EC_DEV 221 help 222 This option exposes some sysfs attributes to control and get 223 information from ChromeOS EC. 224 225 To compile this driver as a module, choose M here: the 226 module will be called cros_ec_sysfs. 227 228config CROS_EC_TYPEC 229 tristate "ChromeOS EC Type-C Connector Control" 230 depends on MFD_CROS_EC_DEV && TYPEC 231 depends on CROS_USBPD_NOTIFY 232 depends on USB_ROLE_SWITCH 233 default MFD_CROS_EC_DEV 234 help 235 If you say Y here, you get support for accessing Type C connector 236 information from the Chrome OS EC. 237 238 To compile this driver as a module, choose M here: the module will be 239 called cros-ec-typec. 240 241config CROS_HPS_I2C 242 tristate "ChromeOS HPS device" 243 depends on HID && I2C && PM 244 help 245 Say Y here if you want to enable support for the ChromeOS 246 human presence sensor (HPS), attached via I2C. The driver supports a 247 sensor connected to the I2C bus and exposes it as a character device. 248 To save power, the sensor is automatically powered down when no 249 clients are accessing it. 250 251config CROS_USBPD_LOGGER 252 tristate "Logging driver for USB PD charger" 253 depends on CHARGER_CROS_USBPD 254 default y 255 select RTC_LIB 256 help 257 This option enables support for logging event data for the USB PD charger 258 available in the Embedded Controller on ChromeOS systems. 259 260 To compile this driver as a module, choose M here: the 261 module will be called cros_usbpd_logger. 262 263config CROS_USBPD_NOTIFY 264 tristate "ChromeOS Type-C power delivery event notifier" 265 depends on MFD_CROS_EC_DEV 266 default MFD_CROS_EC_DEV 267 help 268 If you say Y here, you get support for Type-C PD event notifications 269 from the ChromeOS EC. On ACPI platorms this driver will bind to the 270 GOOG0003 ACPI device, and on platforms which don't have this device it 271 will get initialized on ECs which support the feature 272 EC_FEATURE_USB_PD. 273 274 To compile this driver as a module, choose M here: the 275 module will be called cros_usbpd_notify. 276 277config CHROMEOS_PRIVACY_SCREEN 278 tristate "ChromeOS Privacy Screen support" 279 depends on ACPI 280 depends on DRM 281 select DRM_PRIVACY_SCREEN 282 help 283 This driver provides the support needed for the in-built electronic 284 privacy screen that is present on some ChromeOS devices. When enabled, 285 this should probably always be built into the kernel to avoid or 286 minimize drm probe deferral. 287 288config CROS_TYPEC_SWITCH 289 tristate "ChromeOS EC Type-C Switch Control" 290 depends on MFD_CROS_EC_DEV && TYPEC && ACPI 291 default MFD_CROS_EC_DEV 292 help 293 If you say Y here, you get support for configuring the ChromeOS EC Type-C 294 muxes and retimers. 295 296 To compile this driver as a module, choose M here: the module will be 297 called cros_typec_switch. 298 299source "drivers/platform/chrome/wilco_ec/Kconfig" 300 301# Kunit test cases 302config CROS_KUNIT_EC_PROTO_TEST 303 tristate "Kunit tests for ChromeOS EC protocol" if !KUNIT_ALL_TESTS 304 depends on KUNIT && CROS_EC 305 default KUNIT_ALL_TESTS 306 select CROS_EC_PROTO 307 help 308 Kunit tests for ChromeOS EC protocol. 309 310endif # CHROMEOS_PLATFORMS 311