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 MFD_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_LIGHTBAR 140 tristate "Chromebook Pixel's lightbar support" 141 depends on MFD_CROS_EC_CHARDEV 142 default MFD_CROS_EC_CHARDEV 143 help 144 This option exposes the Chromebook Pixel's lightbar to 145 userspace. 146 147 To compile this driver as a module, choose M here: the 148 module will be called cros_ec_lightbar. 149 150config CROS_EC_VBC 151 tristate "ChromeOS EC vboot context support" 152 depends on MFD_CROS_EC_CHARDEV && OF 153 default MFD_CROS_EC_CHARDEV 154 help 155 This option exposes the ChromeOS EC vboot context nvram to 156 userspace. 157 158 To compile this driver as a module, choose M here: the 159 module will be called cros_ec_vbc. 160 161config CROS_EC_DEBUGFS 162 tristate "Export ChromeOS EC internals in DebugFS" 163 depends on MFD_CROS_EC_CHARDEV && DEBUG_FS 164 default MFD_CROS_EC_CHARDEV 165 help 166 This option exposes the ChromeOS EC device internals to 167 userspace. 168 169 To compile this driver as a module, choose M here: the 170 module will be called cros_ec_debugfs. 171 172config CROS_EC_SYSFS 173 tristate "ChromeOS EC control and information through sysfs" 174 depends on MFD_CROS_EC_CHARDEV && SYSFS 175 default MFD_CROS_EC_CHARDEV 176 help 177 This option exposes some sysfs attributes to control and get 178 information from ChromeOS EC. 179 180 To compile this driver as a module, choose M here: the 181 module will be called cros_ec_sysfs. 182 183config CROS_USBPD_LOGGER 184 tristate "Logging driver for USB PD charger" 185 depends on CHARGER_CROS_USBPD 186 default y 187 select RTC_LIB 188 help 189 This option enables support for logging event data for the USB PD charger 190 available in the Embedded Controller on ChromeOS systems. 191 192 To compile this driver as a module, choose M here: the 193 module will be called cros_usbpd_logger. 194 195source "drivers/platform/chrome/wilco_ec/Kconfig" 196 197endif # CHROMEOS_PLATFORMS 198