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_SPI 76 tristate "ChromeOS Embedded Controller (SPI)" 77 depends on MFD_CROS_EC && SPI 78 79 ---help--- 80 If you say Y here, you get support for talking to the ChromeOS EC 81 through a SPI bus, using a byte-level protocol. Since the EC's 82 response time cannot be guaranteed, we support ignoring 83 'pre-amble' bytes before the response actually starts. 84 85config CROS_EC_LPC 86 tristate "ChromeOS Embedded Controller (LPC)" 87 depends on MFD_CROS_EC && ACPI && (X86 || COMPILE_TEST) 88 help 89 If you say Y here, you get support for talking to the ChromeOS EC 90 over an LPC bus. This uses a simple byte-level protocol with a 91 checksum. This is used for userspace access only. The kernel 92 typically has its own communication methods. 93 94 To compile this driver as a module, choose M here: the 95 module will be called cros_ec_lpc. 96 97config CROS_EC_LPC_MEC 98 bool "ChromeOS Embedded Controller LPC Microchip EC (MEC) variant" 99 depends on CROS_EC_LPC 100 default n 101 help 102 If you say Y here, a variant LPC protocol for the Microchip EC 103 will be used. Note that this variant is not backward compatible 104 with non-Microchip ECs. 105 106 If you have a ChromeOS Embedded Controller Microchip EC variant 107 choose Y here. 108 109config CROS_EC_PROTO 110 bool 111 help 112 ChromeOS EC communication protocol helpers. 113 114config CROS_KBD_LED_BACKLIGHT 115 tristate "Backlight LED support for Chrome OS keyboards" 116 depends on LEDS_CLASS && ACPI 117 help 118 This option enables support for the keyboard backlight LEDs on 119 select Chrome OS systems. 120 121 To compile this driver as a module, choose M here: the 122 module will be called cros_kbd_led_backlight. 123 124config CROS_EC_LIGHTBAR 125 tristate "Chromebook Pixel's lightbar support" 126 depends on MFD_CROS_EC_CHARDEV 127 default MFD_CROS_EC_CHARDEV 128 help 129 This option exposes the Chromebook Pixel's lightbar to 130 userspace. 131 132 To compile this driver as a module, choose M here: the 133 module will be called cros_ec_lightbar. 134 135config CROS_EC_VBC 136 tristate "ChromeOS EC vboot context support" 137 depends on MFD_CROS_EC_CHARDEV && OF 138 default MFD_CROS_EC_CHARDEV 139 help 140 This option exposes the ChromeOS EC vboot context nvram to 141 userspace. 142 143 To compile this driver as a module, choose M here: the 144 module will be called cros_ec_vbc. 145 146config CROS_EC_DEBUGFS 147 tristate "Export ChromeOS EC internals in DebugFS" 148 depends on MFD_CROS_EC_CHARDEV && DEBUG_FS 149 default MFD_CROS_EC_CHARDEV 150 help 151 This option exposes the ChromeOS EC device internals to 152 userspace. 153 154 To compile this driver as a module, choose M here: the 155 module will be called cros_ec_debugfs. 156 157config CROS_EC_SYSFS 158 tristate "ChromeOS EC control and information through sysfs" 159 depends on MFD_CROS_EC_CHARDEV && SYSFS 160 default MFD_CROS_EC_CHARDEV 161 help 162 This option exposes some sysfs attributes to control and get 163 information from ChromeOS EC. 164 165 To compile this driver as a module, choose M here: the 166 module will be called cros_ec_sysfs. 167 168config CROS_USBPD_LOGGER 169 tristate "Logging driver for USB PD charger" 170 depends on CHARGER_CROS_USBPD 171 default y 172 select RTC_LIB 173 help 174 This option enables support for logging event data for the USB PD charger 175 available in the Embedded Controller on ChromeOS systems. 176 177 To compile this driver as a module, choose M here: the 178 module will be called cros_usbpd_logger. 179 180source "drivers/platform/chrome/wilco_ec/Kconfig" 181 182endif # CHROMEOS_PLATFORMS 183