1 # SPDX-License-Identifier: GPL-2.0-only
3 # Platform support for Chrome OS hardware (Chromebooks and Chromeboxes)
6 menuconfig CHROME_PLATFORMS
7 bool "Platform support for Chrome hardware"
8 depends on X86 || ARM || ARM64 || COMPILE_TEST
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.
14 If you say N, all options in this submenu will be skipped and disabled.
19 tristate "ChromeOS specific ACPI extensions"
22 This driver provides the firmware interface for the services
23 exported through the ChromeOS interfaces when using ChromeOS
26 If you have an ACPI-compatible Chromebook, say Y or M here.
27 The module will be called chromeos_acpi.
29 config CHROMEOS_LAPTOP
30 tristate "Chrome OS Laptop"
31 depends on I2C && DMI && X86
33 This driver instantiates i2c and smbus devices such as
34 light sensors and touchpads.
36 If you have a supported Chromebook, choose Y or M here.
37 The module will be called chromeos_laptop.
39 config CHROMEOS_PSTORE
40 tristate "Chrome OS pstore support"
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.
47 The range of memory used is 0xf00000-0x1000000, traditionally
48 the memory used to back VGA controller memory.
50 If you have a supported Chromebook, choose Y or M here.
51 The module will be called chromeos_pstore.
54 tristate "ChromeOS Tablet Switch Controller"
58 This option adds a driver for the tablet switch on
59 select Chrome OS systems.
61 To compile this driver as a module, choose M here: the
62 module will be called chromeos_tbmc.
65 tristate "ChromeOS Embedded Controller"
67 depends on X86 || ARM || ARM64 || COMPILE_TEST
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.
74 To compile this driver as a module, choose M here: the
75 module will be called cros_ec.
78 tristate "ChromeOS Embedded Controller (I2C)"
79 depends on CROS_EC && I2C
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
88 tristate "ChromeOS Embedded Controller (rpmsg)"
89 depends on CROS_EC && RPMSG && OF
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.
96 To compile this driver as a module, choose M here: the
97 module will be called cros_ec_rpmsg.
100 tristate "ChromeOS Embedded Controller (ISHTP)"
102 depends on INTEL_ISH_HID
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.
109 To compile this driver as a module, choose M here: the
110 module will be called cros_ec_ishtp.
113 tristate "ChromeOS Embedded Controller (SPI)"
114 depends on CROS_EC && SPI
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.
123 tristate "ChromeOS Embedded Controller (LPC)"
124 depends on CROS_EC && ACPI && (X86 || COMPILE_TEST)
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.
132 To compile this driver as a module, choose M here: the
133 module will be called cros_ec_lpcs.
138 ChromeOS EC communication protocol helpers.
140 config CROS_KBD_LED_BACKLIGHT
141 tristate "Backlight LED support for Chrome OS keyboards"
142 depends on LEDS_CLASS && ACPI
144 This option enables support for the keyboard backlight LEDs on
145 select Chrome OS systems.
147 To compile this driver as a module, choose M here: the
148 module will be called cros_kbd_led_backlight.
150 config CROS_EC_CHARDEV
151 tristate "ChromeOS EC miscdevice"
152 depends on MFD_CROS_EC_DEV
153 default MFD_CROS_EC_DEV
155 This driver adds file operations support to talk with the
156 ChromeOS EC from userspace via a character device.
158 To compile this driver as a module, choose M here: the
159 module will be called cros_ec_chardev.
161 config CROS_EC_LIGHTBAR
162 tristate "Chromebook Pixel's lightbar support"
163 depends on MFD_CROS_EC_DEV
164 default MFD_CROS_EC_DEV
166 This option exposes the Chromebook Pixel's lightbar to
169 To compile this driver as a module, choose M here: the
170 module will be called cros_ec_lightbar.
173 tristate "ChromeOS EC vboot context support"
174 depends on MFD_CROS_EC_DEV && OF
175 default MFD_CROS_EC_DEV
177 This option exposes the ChromeOS EC vboot context nvram to
180 To compile this driver as a module, choose M here: the
181 module will be called cros_ec_vbc.
183 config 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
188 This option exposes the ChromeOS EC device internals to
191 To compile this driver as a module, choose M here: the
192 module will be called cros_ec_debugfs.
194 config CROS_EC_SENSORHUB
195 tristate "ChromeOS EC MEMS Sensor Hub"
196 depends on MFD_CROS_EC_DEV
197 default MFD_CROS_EC_DEV
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
204 To compile this driver as a module, choose M here: the
205 module will be called cros_ec_sensorhub.
208 tristate "ChromeOS EC control and information through sysfs"
209 depends on MFD_CROS_EC_DEV && SYSFS
210 default MFD_CROS_EC_DEV
212 This option exposes some sysfs attributes to control and get
213 information from ChromeOS EC.
215 To compile this driver as a module, choose M here: the
216 module will be called cros_ec_sysfs.
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
225 If you say Y here, you get support for accessing Type C connector
226 information from the Chrome OS EC.
228 To compile this driver as a module, choose M here: the module will be
229 called cros_ec_typec.
231 config CROS_USBPD_LOGGER
232 tristate "Logging driver for USB PD charger"
233 depends on CHARGER_CROS_USBPD
237 This option enables support for logging event data for the USB PD charger
238 available in the Embedded Controller on ChromeOS systems.
240 To compile this driver as a module, choose M here: the
241 module will be called cros_usbpd_logger.
243 config CROS_USBPD_NOTIFY
244 tristate "ChromeOS Type-C power delivery event notifier"
245 depends on MFD_CROS_EC_DEV
246 default MFD_CROS_EC_DEV
248 If you say Y here, you get support for Type-C PD event notifications
249 from the ChromeOS EC. On ACPI platorms this driver will bind to the
250 GOOG0003 ACPI device, and on platforms which don't have this device it
251 will get initialized on ECs which support the feature
254 To compile this driver as a module, choose M here: the
255 module will be called cros_usbpd_notify.
257 config CHROMEOS_PRIVACY_SCREEN
258 tristate "ChromeOS Privacy Screen support"
261 select DRM_PRIVACY_SCREEN
263 This driver provides the support needed for the in-built electronic
264 privacy screen that is present on some ChromeOS devices. When enabled,
265 this should probably always be built into the kernel to avoid or
266 minimize drm probe deferral.
268 source "drivers/platform/chrome/wilco_ec/Kconfig"
270 endif # CHROMEOS_PLATFORMS