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_I2C 54 tristate "ChromeOS Embedded Controller (I2C)" 55 depends on MFD_CROS_EC && I2C 56 57 help 58 If you say Y here, you get support for talking to the ChromeOS 59 EC through an I2C bus. This uses a simple byte-level protocol with 60 a checksum. Failing accesses will be retried three times to 61 improve reliability. 62 63config CROS_EC_RPMSG 64 tristate "ChromeOS Embedded Controller (rpmsg)" 65 depends on MFD_CROS_EC && RPMSG && OF 66 help 67 If you say Y here, you get support for talking to the ChromeOS EC 68 through rpmsg. This uses a simple byte-level protocol with a 69 checksum. Also since there's no addition EC-to-host interrupt, this 70 use a byte in message to distinguish host event from host command. 71 72 To compile this driver as a module, choose M here: the 73 module will be called cros_ec_rpmsg. 74 75config CROS_EC_ISHTP 76 tristate "ChromeOS Embedded Controller (ISHTP)" 77 depends on MFD_CROS_EC 78 depends on INTEL_ISH_HID 79 help 80 If you say Y here, you get support for talking to the ChromeOS EC 81 firmware running on Intel Integrated Sensor Hub (ISH), using the 82 ISH Transport protocol (ISH-TP). This uses a simple byte-level 83 protocol with a checksum. 84 85 To compile this driver as a module, choose M here: the 86 module will be called cros_ec_ishtp. 87 88config CROS_EC_SPI 89 tristate "ChromeOS Embedded Controller (SPI)" 90 depends on MFD_CROS_EC && SPI 91 92 ---help--- 93 If you say Y here, you get support for talking to the ChromeOS EC 94 through a SPI bus, using a byte-level protocol. Since the EC's 95 response time cannot be guaranteed, we support ignoring 96 'pre-amble' bytes before the response actually starts. 97 98config CROS_EC_LPC 99 tristate "ChromeOS Embedded Controller (LPC)" 100 depends on MFD_CROS_EC && ACPI && (X86 || COMPILE_TEST) 101 help 102 If you say Y here, you get support for talking to the ChromeOS EC 103 over an LPC bus, including the LPC Microchip EC (MEC) variant. 104 This uses a simple byte-level protocol with a checksum. This is 105 used for userspace access only. The kernel typically has its own 106 communication methods. 107 108 To compile this driver as a module, choose M here: the 109 module will be called cros_ec_lpcs. 110 111config CROS_EC_PROTO 112 bool 113 help 114 ChromeOS EC communication protocol helpers. 115 116config CROS_KBD_LED_BACKLIGHT 117 tristate "Backlight LED support for Chrome OS keyboards" 118 depends on LEDS_CLASS && ACPI 119 help 120 This option enables support for the keyboard backlight LEDs on 121 select Chrome OS systems. 122 123 To compile this driver as a module, choose M here: the 124 module will be called cros_kbd_led_backlight. 125 126config CROS_EC_LIGHTBAR 127 tristate "Chromebook Pixel's lightbar support" 128 depends on MFD_CROS_EC_CHARDEV 129 default MFD_CROS_EC_CHARDEV 130 help 131 This option exposes the Chromebook Pixel's lightbar to 132 userspace. 133 134 To compile this driver as a module, choose M here: the 135 module will be called cros_ec_lightbar. 136 137config CROS_EC_VBC 138 tristate "ChromeOS EC vboot context support" 139 depends on MFD_CROS_EC_CHARDEV && OF 140 default MFD_CROS_EC_CHARDEV 141 help 142 This option exposes the ChromeOS EC vboot context nvram to 143 userspace. 144 145 To compile this driver as a module, choose M here: the 146 module will be called cros_ec_vbc. 147 148config CROS_EC_DEBUGFS 149 tristate "Export ChromeOS EC internals in DebugFS" 150 depends on MFD_CROS_EC_CHARDEV && DEBUG_FS 151 default MFD_CROS_EC_CHARDEV 152 help 153 This option exposes the ChromeOS EC device internals to 154 userspace. 155 156 To compile this driver as a module, choose M here: the 157 module will be called cros_ec_debugfs. 158 159config CROS_EC_SYSFS 160 tristate "ChromeOS EC control and information through sysfs" 161 depends on MFD_CROS_EC_CHARDEV && SYSFS 162 default MFD_CROS_EC_CHARDEV 163 help 164 This option exposes some sysfs attributes to control and get 165 information from ChromeOS EC. 166 167 To compile this driver as a module, choose M here: the 168 module will be called cros_ec_sysfs. 169 170config CROS_USBPD_LOGGER 171 tristate "Logging driver for USB PD charger" 172 depends on CHARGER_CROS_USBPD 173 default y 174 select RTC_LIB 175 help 176 This option enables support for logging event data for the USB PD charger 177 available in the Embedded Controller on ChromeOS systems. 178 179 To compile this driver as a module, choose M here: the 180 module will be called cros_usbpd_logger. 181 182source "drivers/platform/chrome/wilco_ec/Kconfig" 183 184endif # CHROMEOS_PLATFORMS 185