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 CHROMEOS_OF_HW_PROBER 65 tristate "ChromeOS Device Tree Hardware Prober" 66 depends on OF 67 depends on I2C 68 select OF_DYNAMIC 69 default OF 70 help 71 This option enables the device tree hardware prober for ChromeOS 72 devices. The driver will probe the correct component variant in 73 devices that have multiple drop-in options for one component. 74 75config CROS_EC 76 tristate "ChromeOS Embedded Controller" 77 select CROS_EC_PROTO 78 depends on X86 || ARM || ARM64 || COMPILE_TEST 79 help 80 If you say Y here you get support for the ChromeOS Embedded 81 Controller (EC) providing keyboard, battery and power services. 82 You also need to enable the driver for the bus you are using. The 83 protocol for talking to the EC is defined by the bus driver. 84 85 To compile this driver as a module, choose M here: the 86 module will be called cros_ec. 87 88config CROS_EC_I2C 89 tristate "ChromeOS Embedded Controller (I2C)" 90 depends on CROS_EC && I2C 91 92 help 93 If you say Y here, you get support for talking to the ChromeOS 94 EC through an I2C bus. This uses a simple byte-level protocol with 95 a checksum. Failing accesses will be retried three times to 96 improve reliability. 97 98config CROS_EC_RPMSG 99 tristate "ChromeOS Embedded Controller (rpmsg)" 100 depends on CROS_EC && RPMSG && OF 101 help 102 If you say Y here, you get support for talking to the ChromeOS EC 103 through rpmsg. This uses a simple byte-level protocol with a 104 checksum. Also since there's no addition EC-to-host interrupt, this 105 use a byte in message to distinguish host event from host command. 106 107 To compile this driver as a module, choose M here: the 108 module will be called cros_ec_rpmsg. 109 110config CROS_EC_ISHTP 111 tristate "ChromeOS Embedded Controller (ISHTP)" 112 depends on CROS_EC 113 depends on INTEL_ISH_HID 114 help 115 If you say Y here, you get support for talking to the ChromeOS EC 116 firmware running on Intel Integrated Sensor Hub (ISH), using the 117 ISH Transport protocol (ISH-TP). This uses a simple byte-level 118 protocol with a checksum. 119 120 To compile this driver as a module, choose M here: the 121 module will be called cros_ec_ishtp. 122 123config CROS_EC_SPI 124 tristate "ChromeOS Embedded Controller (SPI)" 125 depends on CROS_EC && SPI 126 127 help 128 If you say Y here, you get support for talking to the ChromeOS EC 129 through a SPI bus, using a byte-level protocol. Since the EC's 130 response time cannot be guaranteed, we support ignoring 131 'pre-amble' bytes before the response actually starts. 132 133config CROS_EC_UART 134 tristate "ChromeOS Embedded Controller (UART)" 135 depends on CROS_EC && ACPI && SERIAL_DEV_BUS 136 help 137 If you say Y here, you get support for talking to the ChromeOS EC 138 through a UART, using a byte-level protocol. 139 140 To compile this driver as a module, choose M here: the 141 module will be called cros_ec_uart. 142 143config CROS_EC_LPC 144 tristate "ChromeOS Embedded Controller (LPC)" 145 depends on CROS_EC && ACPI && (X86 || COMPILE_TEST) 146 depends on HAS_IOPORT 147 help 148 If you say Y here, you get support for talking to the ChromeOS EC 149 over an LPC bus, including the LPC Microchip EC (MEC) variant. 150 This uses a simple byte-level protocol with a checksum. This is 151 used for userspace access only. The kernel typically has its own 152 communication methods. 153 154 To compile this driver as a module, choose M here: the 155 module will be called cros_ec_lpcs. 156 157config CROS_EC_PROTO 158 bool 159 help 160 ChromeOS EC communication protocol helpers. 161 162config CROS_KBD_LED_BACKLIGHT 163 tristate "Backlight LED support for Chrome OS keyboards" 164 depends on LEDS_CLASS && (ACPI || CROS_EC || MFD_CROS_EC_DEV) 165 help 166 This option enables support for the keyboard backlight LEDs on 167 select Chrome OS systems. 168 169 To compile this driver as a module, choose M here: the 170 module will be called cros_kbd_led_backlight. 171 172config CROS_EC_CHARDEV 173 tristate "ChromeOS EC miscdevice" 174 depends on MFD_CROS_EC_DEV 175 default MFD_CROS_EC_DEV 176 help 177 This driver adds file operations support to talk with the 178 ChromeOS EC from userspace via a character device. 179 180 To compile this driver as a module, choose M here: the 181 module will be called cros_ec_chardev. 182 183config CROS_EC_LIGHTBAR 184 tristate "Chromebook Pixel's lightbar support" 185 depends on MFD_CROS_EC_DEV 186 default MFD_CROS_EC_DEV 187 help 188 This option exposes the Chromebook Pixel's lightbar to 189 userspace. 190 191 To compile this driver as a module, choose M here: the 192 module will be called cros_ec_lightbar. 193 194config CROS_EC_VBC 195 tristate "ChromeOS EC vboot context support" 196 depends on MFD_CROS_EC_DEV && OF 197 default MFD_CROS_EC_DEV 198 help 199 This option exposes the ChromeOS EC vboot context nvram to 200 userspace. 201 202 To compile this driver as a module, choose M here: the 203 module will be called cros_ec_vbc. 204 205config CROS_EC_DEBUGFS 206 tristate "Export ChromeOS EC internals in DebugFS" 207 depends on MFD_CROS_EC_DEV && DEBUG_FS 208 default MFD_CROS_EC_DEV 209 help 210 This option exposes the ChromeOS EC device internals to 211 userspace. 212 213 To compile this driver as a module, choose M here: the 214 module will be called cros_ec_debugfs. 215 216config CROS_EC_SENSORHUB 217 tristate "ChromeOS EC MEMS Sensor Hub" 218 depends on MFD_CROS_EC_DEV 219 default MFD_CROS_EC_DEV 220 help 221 Allow loading IIO sensors. This driver is loaded by MFD and will in 222 turn query the EC and register the sensors. 223 It also spreads the sensor data coming from the EC to the IIO sensor 224 object. 225 226 To compile this driver as a module, choose M here: the 227 module will be called cros_ec_sensorhub. 228 229config CROS_EC_SYSFS 230 tristate "ChromeOS EC control and information through sysfs" 231 depends on MFD_CROS_EC_DEV && SYSFS 232 default MFD_CROS_EC_DEV 233 help 234 This option exposes some sysfs attributes to control and get 235 information from ChromeOS EC. 236 237 To compile this driver as a module, choose M here: the 238 module will be called cros_ec_sysfs. 239 240config CROS_EC_TYPEC 241 tristate "ChromeOS EC Type-C Connector Control" 242 depends on MFD_CROS_EC_DEV && TYPEC 243 depends on CROS_USBPD_NOTIFY 244 depends on USB_ROLE_SWITCH 245 default MFD_CROS_EC_DEV 246 help 247 If you say Y here, you get support for accessing Type C connector 248 information from the Chrome OS EC. 249 250 To compile this driver as a module, choose M here: the module will be 251 called cros-ec-typec. 252 253config CROS_HPS_I2C 254 tristate "ChromeOS HPS device" 255 depends on HID && I2C && PM 256 help 257 Say Y here if you want to enable support for the ChromeOS 258 human presence sensor (HPS), attached via I2C. The driver supports a 259 sensor connected to the I2C bus and exposes it as a character device. 260 To save power, the sensor is automatically powered down when no 261 clients are accessing it. 262 263config CROS_USBPD_LOGGER 264 tristate "Logging driver for USB PD charger" 265 depends on CHARGER_CROS_USBPD 266 default y 267 select RTC_LIB 268 help 269 This option enables support for logging event data for the USB PD charger 270 available in the Embedded Controller on ChromeOS systems. 271 272 To compile this driver as a module, choose M here: the 273 module will be called cros_usbpd_logger. 274 275config CROS_USBPD_NOTIFY 276 tristate "ChromeOS Type-C power delivery event notifier" 277 depends on MFD_CROS_EC_DEV 278 default MFD_CROS_EC_DEV 279 help 280 If you say Y here, you get support for Type-C PD event notifications 281 from the ChromeOS EC. On ACPI platorms this driver will bind to the 282 GOOG0003 ACPI device, and on platforms which don't have this device it 283 will get initialized on ECs which support the feature 284 EC_FEATURE_USB_PD. 285 286 To compile this driver as a module, choose M here: the 287 module will be called cros_usbpd_notify. 288 289config CHROMEOS_PRIVACY_SCREEN 290 tristate "ChromeOS Privacy Screen support" 291 depends on ACPI 292 depends on DRM 293 select DRM_PRIVACY_SCREEN 294 help 295 This driver provides the support needed for the in-built electronic 296 privacy screen that is present on some ChromeOS devices. When enabled, 297 this should probably always be built into the kernel to avoid or 298 minimize drm probe deferral. 299 300config CROS_TYPEC_SWITCH 301 tristate "ChromeOS EC Type-C Switch Control" 302 depends on MFD_CROS_EC_DEV && TYPEC && ACPI 303 default MFD_CROS_EC_DEV 304 help 305 If you say Y here, you get support for configuring the ChromeOS EC Type-C 306 muxes and retimers. 307 308 To compile this driver as a module, choose M here: the module will be 309 called cros_typec_switch. 310 311source "drivers/platform/chrome/wilco_ec/Kconfig" 312 313# Kunit test cases 314config CROS_KUNIT_EC_PROTO_TEST 315 tristate "Kunit tests for ChromeOS EC protocol" if !KUNIT_ALL_TESTS 316 depends on KUNIT && CROS_EC 317 default KUNIT_ALL_TESTS 318 select CROS_EC_PROTO 319 help 320 Kunit tests for ChromeOS EC protocol. 321 322endif # CHROMEOS_PLATFORMS 323