Linux kernel mirror (for testing)
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linux
1# SPDX-License-Identifier: GPL-2.0-only
2#
3# Platform support for Chrome OS hardware (Chromebooks and Chromeboxes)
4#
5
6config MFD_CROS_EC
7 tristate "Platform support for Chrome hardware (transitional)"
8 select CHROME_PLATFORMS
9 select CROS_EC
10 select MFD_CROS_EC_DEV
11 depends on X86 || ARM || ARM64 || COMPILE_TEST
12 help
13 This is a transitional Kconfig option and will be removed after
14 everyone enables the parts individually.
15
16menuconfig CHROME_PLATFORMS
17 bool "Platform support for Chrome hardware"
18 depends on X86 || ARM || ARM64 || COMPILE_TEST
19 ---help---
20 Say Y here to get to see options for platform support for
21 various Chromebooks and Chromeboxes. This option alone does
22 not add any kernel code.
23
24 If you say N, all options in this submenu will be skipped and disabled.
25
26if CHROME_PLATFORMS
27
28config CHROMEOS_LAPTOP
29 tristate "Chrome OS Laptop"
30 depends on I2C && DMI && X86
31 ---help---
32 This driver instantiates i2c and smbus devices such as
33 light sensors and touchpads.
34
35 If you have a supported Chromebook, choose Y or M here.
36 The module will be called chromeos_laptop.
37
38config CHROMEOS_PSTORE
39 tristate "Chrome OS pstore support"
40 depends on X86
41 ---help---
42 This module instantiates the persistent storage on x86 ChromeOS
43 devices. It can be used to store away console logs and crash
44 information across reboots.
45
46 The range of memory used is 0xf00000-0x1000000, traditionally
47 the memory used to back VGA controller memory.
48
49 If you have a supported Chromebook, choose Y or M here.
50 The module will be called chromeos_pstore.
51
52config CHROMEOS_TBMC
53 tristate "ChromeOS Tablet Switch Controller"
54 depends on ACPI
55 depends on INPUT
56 help
57 This option adds a driver for the tablet switch on
58 select Chrome OS systems.
59
60 To compile this driver as a module, choose M here: the
61 module will be called chromeos_tbmc.
62
63config CROS_EC
64 tristate "ChromeOS Embedded Controller"
65 select CROS_EC_PROTO
66 depends on X86 || ARM || ARM64 || COMPILE_TEST
67 help
68 If you say Y here you get support for the ChromeOS Embedded
69 Controller (EC) providing keyboard, battery and power services.
70 You also need to enable the driver for the bus you are using. The
71 protocol for talking to the EC is defined by the bus driver.
72
73 To compile this driver as a module, choose M here: the
74 module will be called cros_ec.
75
76config CROS_EC_I2C
77 tristate "ChromeOS Embedded Controller (I2C)"
78 depends on CROS_EC && I2C
79
80 help
81 If you say Y here, you get support for talking to the ChromeOS
82 EC through an I2C bus. This uses a simple byte-level protocol with
83 a checksum. Failing accesses will be retried three times to
84 improve reliability.
85
86config CROS_EC_RPMSG
87 tristate "ChromeOS Embedded Controller (rpmsg)"
88 depends on CROS_EC && RPMSG && OF
89 help
90 If you say Y here, you get support for talking to the ChromeOS EC
91 through rpmsg. This uses a simple byte-level protocol with a
92 checksum. Also since there's no addition EC-to-host interrupt, this
93 use a byte in message to distinguish host event from host command.
94
95 To compile this driver as a module, choose M here: the
96 module will be called cros_ec_rpmsg.
97
98config CROS_EC_ISHTP
99 tristate "ChromeOS Embedded Controller (ISHTP)"
100 depends on CROS_EC
101 depends on INTEL_ISH_HID
102 help
103 If you say Y here, you get support for talking to the ChromeOS EC
104 firmware running on Intel Integrated Sensor Hub (ISH), using the
105 ISH Transport protocol (ISH-TP). This uses a simple byte-level
106 protocol with a checksum.
107
108 To compile this driver as a module, choose M here: the
109 module will be called cros_ec_ishtp.
110
111config CROS_EC_SPI
112 tristate "ChromeOS Embedded Controller (SPI)"
113 depends on CROS_EC && SPI
114
115 ---help---
116 If you say Y here, you get support for talking to the ChromeOS EC
117 through a SPI bus, using a byte-level protocol. Since the EC's
118 response time cannot be guaranteed, we support ignoring
119 'pre-amble' bytes before the response actually starts.
120
121config CROS_EC_LPC
122 tristate "ChromeOS Embedded Controller (LPC)"
123 depends on CROS_EC && ACPI && (X86 || COMPILE_TEST)
124 help
125 If you say Y here, you get support for talking to the ChromeOS EC
126 over an LPC bus, including the LPC Microchip EC (MEC) variant.
127 This uses a simple byte-level protocol with a checksum. This is
128 used for userspace access only. The kernel typically has its own
129 communication methods.
130
131 To compile this driver as a module, choose M here: the
132 module will be called cros_ec_lpcs.
133
134config CROS_EC_PROTO
135 bool
136 help
137 ChromeOS EC communication protocol helpers.
138
139config CROS_KBD_LED_BACKLIGHT
140 tristate "Backlight LED support for Chrome OS keyboards"
141 depends on LEDS_CLASS && ACPI
142 help
143 This option enables support for the keyboard backlight LEDs on
144 select Chrome OS systems.
145
146 To compile this driver as a module, choose M here: the
147 module will be called cros_kbd_led_backlight.
148
149config CROS_EC_CHARDEV
150 tristate "ChromeOS EC miscdevice"
151 depends on MFD_CROS_EC_DEV
152 default MFD_CROS_EC_DEV
153 help
154 This driver adds file operations support to talk with the
155 ChromeOS EC from userspace via a character device.
156
157 To compile this driver as a module, choose M here: the
158 module will be called cros_ec_chardev.
159
160config CROS_EC_LIGHTBAR
161 tristate "Chromebook Pixel's lightbar support"
162 depends on MFD_CROS_EC_DEV
163 default MFD_CROS_EC_DEV
164 help
165 This option exposes the Chromebook Pixel's lightbar to
166 userspace.
167
168 To compile this driver as a module, choose M here: the
169 module will be called cros_ec_lightbar.
170
171config CROS_EC_VBC
172 tristate "ChromeOS EC vboot context support"
173 depends on MFD_CROS_EC_DEV && OF
174 default MFD_CROS_EC_DEV
175 help
176 This option exposes the ChromeOS EC vboot context nvram to
177 userspace.
178
179 To compile this driver as a module, choose M here: the
180 module will be called cros_ec_vbc.
181
182config CROS_EC_DEBUGFS
183 tristate "Export ChromeOS EC internals in DebugFS"
184 depends on MFD_CROS_EC_DEV && DEBUG_FS
185 default MFD_CROS_EC_DEV
186 help
187 This option exposes the ChromeOS EC device internals to
188 userspace.
189
190 To compile this driver as a module, choose M here: the
191 module will be called cros_ec_debugfs.
192
193config CROS_EC_SENSORHUB
194 tristate "ChromeOS EC MEMS Sensor Hub"
195 depends on MFD_CROS_EC_DEV
196 default MFD_CROS_EC_DEV
197 help
198 Allow loading IIO sensors. This driver is loaded by MFD and will in
199 turn query the EC and register the sensors.
200 It also spreads the sensor data coming from the EC to the IIO sensor
201 object.
202
203 To compile this driver as a module, choose M here: the
204 module will be called cros_ec_sensorhub.
205
206config CROS_EC_SYSFS
207 tristate "ChromeOS EC control and information through sysfs"
208 depends on MFD_CROS_EC_DEV && SYSFS
209 default MFD_CROS_EC_DEV
210 help
211 This option exposes some sysfs attributes to control and get
212 information from ChromeOS EC.
213
214 To compile this driver as a module, choose M here: the
215 module will be called cros_ec_sysfs.
216
217config CROS_EC_TYPEC
218 tristate "ChromeOS EC Type-C Connector Control"
219 depends on MFD_CROS_EC_DEV && TYPEC
220 default MFD_CROS_EC_DEV
221 help
222 If you say Y here, you get support for accessing Type C connector
223 information from the Chrome OS EC.
224
225 To compile this driver as a module, choose M here: the module will be
226 called cros_ec_typec.
227
228config CROS_USBPD_LOGGER
229 tristate "Logging driver for USB PD charger"
230 depends on CHARGER_CROS_USBPD
231 default y
232 select RTC_LIB
233 help
234 This option enables support for logging event data for the USB PD charger
235 available in the Embedded Controller on ChromeOS systems.
236
237 To compile this driver as a module, choose M here: the
238 module will be called cros_usbpd_logger.
239
240config CROS_USBPD_NOTIFY
241 tristate "ChromeOS Type-C power delivery event notifier"
242 depends on MFD_CROS_EC_DEV
243 default MFD_CROS_EC_DEV
244 help
245 If you say Y here, you get support for Type-C PD event notifications
246 from the ChromeOS EC. On ACPI platorms this driver will bind to the
247 GOOG0003 ACPI device, and on platforms which don't have this device it
248 will get initialized on ECs which support the feature
249 EC_FEATURE_USB_PD.
250
251 To compile this driver as a module, choose M here: the
252 module will be called cros_usbpd_notify.
253
254source "drivers/platform/chrome/wilco_ec/Kconfig"
255
256endif # CHROMEOS_PLATFORMS