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