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_LPC 123 tristate "ChromeOS Embedded Controller (LPC)" 124 depends on CROS_EC && ACPI && (X86 || COMPILE_TEST) 125 help 126 If you say Y here, you get support for talking to the ChromeOS EC 127 over an LPC bus, including the LPC Microchip EC (MEC) variant. 128 This uses a simple byte-level protocol with a checksum. This is 129 used for userspace access only. The kernel typically has its own 130 communication methods. 131 132 To compile this driver as a module, choose M here: the 133 module will be called cros_ec_lpcs. 134 135config CROS_EC_PROTO 136 bool 137 help 138 ChromeOS EC communication protocol helpers. 139 140config CROS_KBD_LED_BACKLIGHT 141 tristate "Backlight LED support for Chrome OS keyboards" 142 depends on LEDS_CLASS && (ACPI || CROS_EC) 143 help 144 This option enables support for the keyboard backlight LEDs on 145 select Chrome OS systems. 146 147 To compile this driver as a module, choose M here: the 148 module will be called cros_kbd_led_backlight. 149 150config CROS_EC_CHARDEV 151 tristate "ChromeOS EC miscdevice" 152 depends on MFD_CROS_EC_DEV 153 default MFD_CROS_EC_DEV 154 help 155 This driver adds file operations support to talk with the 156 ChromeOS EC from userspace via a character device. 157 158 To compile this driver as a module, choose M here: the 159 module will be called cros_ec_chardev. 160 161config CROS_EC_LIGHTBAR 162 tristate "Chromebook Pixel's lightbar support" 163 depends on MFD_CROS_EC_DEV 164 default MFD_CROS_EC_DEV 165 help 166 This option exposes the Chromebook Pixel's lightbar to 167 userspace. 168 169 To compile this driver as a module, choose M here: the 170 module will be called cros_ec_lightbar. 171 172config CROS_EC_VBC 173 tristate "ChromeOS EC vboot context support" 174 depends on MFD_CROS_EC_DEV && OF 175 default MFD_CROS_EC_DEV 176 help 177 This option exposes the ChromeOS EC vboot context nvram to 178 userspace. 179 180 To compile this driver as a module, choose M here: the 181 module will be called cros_ec_vbc. 182 183config CROS_EC_DEBUGFS 184 tristate "Export ChromeOS EC internals in DebugFS" 185 depends on MFD_CROS_EC_DEV && DEBUG_FS 186 default MFD_CROS_EC_DEV 187 help 188 This option exposes the ChromeOS EC device internals to 189 userspace. 190 191 To compile this driver as a module, choose M here: the 192 module will be called cros_ec_debugfs. 193 194config CROS_EC_SENSORHUB 195 tristate "ChromeOS EC MEMS Sensor Hub" 196 depends on MFD_CROS_EC_DEV 197 default MFD_CROS_EC_DEV 198 help 199 Allow loading IIO sensors. This driver is loaded by MFD and will in 200 turn query the EC and register the sensors. 201 It also spreads the sensor data coming from the EC to the IIO sensor 202 object. 203 204 To compile this driver as a module, choose M here: the 205 module will be called cros_ec_sensorhub. 206 207config CROS_EC_SYSFS 208 tristate "ChromeOS EC control and information through sysfs" 209 depends on MFD_CROS_EC_DEV && SYSFS 210 default MFD_CROS_EC_DEV 211 help 212 This option exposes some sysfs attributes to control and get 213 information from ChromeOS EC. 214 215 To compile this driver as a module, choose M here: the 216 module will be called cros_ec_sysfs. 217 218config CROS_EC_TYPEC 219 tristate "ChromeOS EC Type-C Connector Control" 220 depends on MFD_CROS_EC_DEV && TYPEC 221 depends on CROS_USBPD_NOTIFY 222 depends on USB_ROLE_SWITCH 223 default MFD_CROS_EC_DEV 224 help 225 If you say Y here, you get support for accessing Type C connector 226 information from the Chrome OS EC. 227 228 To compile this driver as a module, choose M here: the module will be 229 called cros_ec_typec. 230 231config CROS_HPS_I2C 232 tristate "ChromeOS HPS device" 233 depends on HID && I2C && PM 234 help 235 Say Y here if you want to enable support for the ChromeOS 236 human presence sensor (HPS), attached via I2C. The driver supports a 237 sensor connected to the I2C bus and exposes it as a character device. 238 To save power, the sensor is automatically powered down when no 239 clients are accessing it. 240 241config CROS_USBPD_LOGGER 242 tristate "Logging driver for USB PD charger" 243 depends on CHARGER_CROS_USBPD 244 default y 245 select RTC_LIB 246 help 247 This option enables support for logging event data for the USB PD charger 248 available in the Embedded Controller on ChromeOS systems. 249 250 To compile this driver as a module, choose M here: the 251 module will be called cros_usbpd_logger. 252 253config CROS_USBPD_NOTIFY 254 tristate "ChromeOS Type-C power delivery event notifier" 255 depends on MFD_CROS_EC_DEV 256 default MFD_CROS_EC_DEV 257 help 258 If you say Y here, you get support for Type-C PD event notifications 259 from the ChromeOS EC. On ACPI platorms this driver will bind to the 260 GOOG0003 ACPI device, and on platforms which don't have this device it 261 will get initialized on ECs which support the feature 262 EC_FEATURE_USB_PD. 263 264 To compile this driver as a module, choose M here: the 265 module will be called cros_usbpd_notify. 266 267config CHROMEOS_PRIVACY_SCREEN 268 tristate "ChromeOS Privacy Screen support" 269 depends on ACPI 270 depends on DRM 271 select DRM_PRIVACY_SCREEN 272 help 273 This driver provides the support needed for the in-built electronic 274 privacy screen that is present on some ChromeOS devices. When enabled, 275 this should probably always be built into the kernel to avoid or 276 minimize drm probe deferral. 277 278config CROS_TYPEC_SWITCH 279 tristate "ChromeOS EC Type-C Switch Control" 280 depends on MFD_CROS_EC_DEV && TYPEC && ACPI 281 default MFD_CROS_EC_DEV 282 help 283 If you say Y here, you get support for configuring the ChromeOS EC Type-C 284 muxes and retimers. 285 286 To compile this driver as a module, choose M here: the module will be 287 called cros_typec_switch. 288 289source "drivers/platform/chrome/wilco_ec/Kconfig" 290 291# Kunit test cases 292config CROS_KUNIT 293 tristate "Kunit tests for ChromeOS" if !KUNIT_ALL_TESTS 294 depends on KUNIT && CROS_EC 295 default KUNIT_ALL_TESTS 296 select CROS_EC_PROTO 297 help 298 ChromeOS Kunit tests. 299 300endif # CHROMEOS_PLATFORMS 301