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1#
2# Platform support for Chrome OS hardware (Chromebooks and Chromeboxes)
3#
4
5menuconfig CHROME_PLATFORMS
6 bool "Platform support for Chrome hardware"
7 depends on X86 || ARM || ARM64 || COMPILE_TEST
8 ---help---
9 Say Y here to get to see options for platform support for
10 various Chromebooks and Chromeboxes. This option alone does
11 not add any kernel code.
12
13 If you say N, all options in this submenu will be skipped and disabled.
14
15if CHROME_PLATFORMS
16
17config CHROMEOS_LAPTOP
18 tristate "Chrome OS Laptop"
19 depends on I2C && DMI && X86
20 ---help---
21 This driver instantiates i2c and smbus devices such as
22 light sensors and touchpads.
23
24 If you have a supported Chromebook, choose Y or M here.
25 The module will be called chromeos_laptop.
26
27config CHROMEOS_PSTORE
28 tristate "Chrome OS pstore support"
29 depends on X86
30 ---help---
31 This module instantiates the persistent storage on x86 ChromeOS
32 devices. It can be used to store away console logs and crash
33 information across reboots.
34
35 The range of memory used is 0xf00000-0x1000000, traditionally
36 the memory used to back VGA controller memory.
37
38 If you have a supported Chromebook, choose Y or M here.
39 The module will be called chromeos_pstore.
40
41config CROS_EC_CHARDEV
42 tristate "Chrome OS Embedded Controller userspace device interface"
43 depends on MFD_CROS_EC
44 ---help---
45 This driver adds support to talk with the ChromeOS EC from userspace.
46
47 If you have a supported Chromebook, choose Y or M here.
48 The module will be called cros_ec_dev.
49
50config CROS_EC_LPC
51 tristate "ChromeOS Embedded Controller (LPC)"
52 depends on MFD_CROS_EC && (X86 || COMPILE_TEST)
53 help
54 If you say Y here, you get support for talking to the ChromeOS EC
55 over an LPC bus. This uses a simple byte-level protocol with a
56 checksum. This is used for userspace access only. The kernel
57 typically has its own communication methods.
58
59 To compile this driver as a module, choose M here: the
60 module will be called cros_ec_lpc.
61
62config CROS_EC_PROTO
63 bool
64 help
65 ChromeOS EC communication protocol helpers.
66
67endif # CHROMEOS_PLATFORMS
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_UART
123 tristate "ChromeOS Embedded Controller (UART)"
124 depends on CROS_EC && ACPI && SERIAL_DEV_BUS
125 help
126 If you say Y here, you get support for talking to the ChromeOS EC
127 through a UART, using a byte-level protocol.
128
129 To compile this driver as a module, choose M here: the
130 module will be called cros_ec_uart.
131
132config CROS_EC_LPC
133 tristate "ChromeOS Embedded Controller (LPC)"
134 depends on CROS_EC && ACPI && (X86 || COMPILE_TEST)
135 help
136 If you say Y here, you get support for talking to the ChromeOS EC
137 over an LPC bus, including the LPC Microchip EC (MEC) variant.
138 This uses a simple byte-level protocol with a checksum. This is
139 used for userspace access only. The kernel typically has its own
140 communication methods.
141
142 To compile this driver as a module, choose M here: the
143 module will be called cros_ec_lpcs.
144
145config CROS_EC_PROTO
146 bool
147 help
148 ChromeOS EC communication protocol helpers.
149
150config CROS_KBD_LED_BACKLIGHT
151 tristate "Backlight LED support for Chrome OS keyboards"
152 depends on LEDS_CLASS && (ACPI || CROS_EC)
153 help
154 This option enables support for the keyboard backlight LEDs on
155 select Chrome OS systems.
156
157 To compile this driver as a module, choose M here: the
158 module will be called cros_kbd_led_backlight.
159
160config CROS_EC_CHARDEV
161 tristate "ChromeOS EC miscdevice"
162 depends on MFD_CROS_EC_DEV
163 default MFD_CROS_EC_DEV
164 help
165 This driver adds file operations support to talk with the
166 ChromeOS EC from userspace via a character device.
167
168 To compile this driver as a module, choose M here: the
169 module will be called cros_ec_chardev.
170
171config CROS_EC_LIGHTBAR
172 tristate "Chromebook Pixel's lightbar support"
173 depends on MFD_CROS_EC_DEV
174 default MFD_CROS_EC_DEV
175 help
176 This option exposes the Chromebook Pixel's lightbar to
177 userspace.
178
179 To compile this driver as a module, choose M here: the
180 module will be called cros_ec_lightbar.
181
182config CROS_EC_VBC
183 tristate "ChromeOS EC vboot context support"
184 depends on MFD_CROS_EC_DEV && OF
185 default MFD_CROS_EC_DEV
186 help
187 This option exposes the ChromeOS EC vboot context nvram to
188 userspace.
189
190 To compile this driver as a module, choose M here: the
191 module will be called cros_ec_vbc.
192
193config CROS_EC_DEBUGFS
194 tristate "Export ChromeOS EC internals in DebugFS"
195 depends on MFD_CROS_EC_DEV && DEBUG_FS
196 default MFD_CROS_EC_DEV
197 help
198 This option exposes the ChromeOS EC device internals to
199 userspace.
200
201 To compile this driver as a module, choose M here: the
202 module will be called cros_ec_debugfs.
203
204config CROS_EC_SENSORHUB
205 tristate "ChromeOS EC MEMS Sensor Hub"
206 depends on MFD_CROS_EC_DEV
207 default MFD_CROS_EC_DEV
208 help
209 Allow loading IIO sensors. This driver is loaded by MFD and will in
210 turn query the EC and register the sensors.
211 It also spreads the sensor data coming from the EC to the IIO sensor
212 object.
213
214 To compile this driver as a module, choose M here: the
215 module will be called cros_ec_sensorhub.
216
217config CROS_EC_SYSFS
218 tristate "ChromeOS EC control and information through sysfs"
219 depends on MFD_CROS_EC_DEV && SYSFS
220 default MFD_CROS_EC_DEV
221 help
222 This option exposes some sysfs attributes to control and get
223 information from ChromeOS EC.
224
225 To compile this driver as a module, choose M here: the
226 module will be called cros_ec_sysfs.
227
228config CROS_EC_TYPEC
229 tristate "ChromeOS EC Type-C Connector Control"
230 depends on MFD_CROS_EC_DEV && TYPEC
231 depends on CROS_USBPD_NOTIFY
232 depends on USB_ROLE_SWITCH
233 default MFD_CROS_EC_DEV
234 help
235 If you say Y here, you get support for accessing Type C connector
236 information from the Chrome OS EC.
237
238 To compile this driver as a module, choose M here: the module will be
239 called cros-ec-typec.
240
241config CROS_HPS_I2C
242 tristate "ChromeOS HPS device"
243 depends on HID && I2C && PM
244 help
245 Say Y here if you want to enable support for the ChromeOS
246 human presence sensor (HPS), attached via I2C. The driver supports a
247 sensor connected to the I2C bus and exposes it as a character device.
248 To save power, the sensor is automatically powered down when no
249 clients are accessing it.
250
251config CROS_USBPD_LOGGER
252 tristate "Logging driver for USB PD charger"
253 depends on CHARGER_CROS_USBPD
254 default y
255 select RTC_LIB
256 help
257 This option enables support for logging event data for the USB PD charger
258 available in the Embedded Controller on ChromeOS systems.
259
260 To compile this driver as a module, choose M here: the
261 module will be called cros_usbpd_logger.
262
263config CROS_USBPD_NOTIFY
264 tristate "ChromeOS Type-C power delivery event notifier"
265 depends on MFD_CROS_EC_DEV
266 default MFD_CROS_EC_DEV
267 help
268 If you say Y here, you get support for Type-C PD event notifications
269 from the ChromeOS EC. On ACPI platorms this driver will bind to the
270 GOOG0003 ACPI device, and on platforms which don't have this device it
271 will get initialized on ECs which support the feature
272 EC_FEATURE_USB_PD.
273
274 To compile this driver as a module, choose M here: the
275 module will be called cros_usbpd_notify.
276
277config CHROMEOS_PRIVACY_SCREEN
278 tristate "ChromeOS Privacy Screen support"
279 depends on ACPI
280 depends on DRM
281 select DRM_PRIVACY_SCREEN
282 help
283 This driver provides the support needed for the in-built electronic
284 privacy screen that is present on some ChromeOS devices. When enabled,
285 this should probably always be built into the kernel to avoid or
286 minimize drm probe deferral.
287
288config CROS_TYPEC_SWITCH
289 tristate "ChromeOS EC Type-C Switch Control"
290 depends on MFD_CROS_EC_DEV && TYPEC && ACPI
291 default MFD_CROS_EC_DEV
292 help
293 If you say Y here, you get support for configuring the ChromeOS EC Type-C
294 muxes and retimers.
295
296 To compile this driver as a module, choose M here: the module will be
297 called cros_typec_switch.
298
299source "drivers/platform/chrome/wilco_ec/Kconfig"
300
301# Kunit test cases
302config CROS_KUNIT_EC_PROTO_TEST
303 tristate "Kunit tests for ChromeOS EC protocol" if !KUNIT_ALL_TESTS
304 depends on KUNIT && CROS_EC
305 default KUNIT_ALL_TESTS
306 select CROS_EC_PROTO
307 help
308 Kunit tests for ChromeOS EC protocol.
309
310endif # CHROMEOS_PLATFORMS