diff options
Diffstat (limited to 'Documentation/devicetree/bindings/i2c')
7 files changed, 100 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c-arb-gpio-challenge.txt b/Documentation/devicetree/bindings/i2c/i2c-arb-gpio-challenge.txt index 1ac8ea8ade1d..bfeabb843941 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-arb-gpio-challenge.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-arb-gpio-challenge.txt @@ -8,6 +8,12 @@ the standard I2C multi-master rules. Using GPIOs is generally useful in the case where there is a device on the bus that has errata and/or bugs that makes standard multimaster mode not feasible. +Note that this scheme works well enough but has some downsides: +* It is nonstandard (not using standard I2C multimaster) +* Having two masters on a bus in general makes it relatively hard to debug + problems (hard to tell if i2c issues were caused by one master, another, or + some device on the bus). + Algorithm: diff --git a/Documentation/devicetree/bindings/i2c/i2c-cros-ec-tunnel.txt b/Documentation/devicetree/bindings/i2c/i2c-cros-ec-tunnel.txt new file mode 100644 index 000000000000..898f030eba62 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-cros-ec-tunnel.txt @@ -0,0 +1,39 @@ +I2C bus that tunnels through the ChromeOS EC (cros-ec) +====================================================== +On some ChromeOS board designs we've got a connection to the EC (embedded +controller) but no direct connection to some devices on the other side of +the EC (like a battery and PMIC). To get access to those devices we need +to tunnel our i2c commands through the EC. + +The node for this device should be under a cros-ec node like google,cros-ec-spi +or google,cros-ec-i2c. + + +Required properties: +- compatible: google,cros-ec-i2c-tunnel +- google,remote-bus: The EC bus we'd like to talk to. + +Optional child nodes: +- One node per I2C device connected to the tunnelled I2C bus. + + +Example: + cros-ec@0 { + compatible = "google,cros-ec-spi"; + + ... + + i2c-tunnel { + compatible = "google,cros-ec-i2c-tunnel"; + #address-cells = <1>; + #size-cells = <0>; + + google,remote-bus = <0>; + + battery: sbs-battery@b { + compatible = "sbs,sbs-battery"; + reg = <0xb>; + sbs,poll-retry-count = <1>; + }; + }; + } diff --git a/Documentation/devicetree/bindings/i2c/i2c-exynos5.txt b/Documentation/devicetree/bindings/i2c/i2c-exynos5.txt index 056732cfdcee..d4745e31f5c6 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-exynos5.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-exynos5.txt @@ -5,7 +5,14 @@ at various speeds ranging from 100khz to 3.4Mhz. Required properties: - compatible: value should be. - -> "samsung,exynos5-hsi2c", for i2c compatible with exynos5 hsi2c. + -> "samsung,exynos5-hsi2c", (DEPRECATED) + for i2c compatible with HSI2C available + on Exynos5250 and Exynos5420 SoCs. + -> "samsung,exynos5250-hsi2c", for i2c compatible with HSI2C available + on Exynos5250 and Exynos5420 SoCs. + -> "samsung,exynos5260-hsi2c", for i2c compatible with HSI2C available + on Exynos5260 SoCs. + - reg: physical base address of the controller and length of memory mapped region. - interrupts: interrupt number to the cpu. @@ -26,7 +33,7 @@ Optional properties: Example: hsi2c@12ca0000 { - compatible = "samsung,exynos5-hsi2c"; + compatible = "samsung,exynos5250-hsi2c"; reg = <0x12ca0000 0x100>; interrupts = <56>; clock-frequency = <100000>; diff --git a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt index befd4fb4764f..5c30026921ae 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt @@ -5,7 +5,7 @@ Required properties : - reg : Offset and length of the register set for the device - compatible : Should be either: - - "allwinner,sun4i-i2c" + - "allwinner,sun4i-a10-i2c" - "allwinner,sun6i-a31-i2c" - "marvell,mv64xxx-i2c" - "marvell,mv78230-i2c" diff --git a/Documentation/devicetree/bindings/i2c/i2c-rcar.txt b/Documentation/devicetree/bindings/i2c/i2c-rcar.txt index dd8b2dd1edeb..16b3e07aa98f 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-rcar.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-rcar.txt @@ -7,6 +7,9 @@ Required properties: "renesas,i2c-r8a7779" "renesas,i2c-r8a7790" "renesas,i2c-r8a7791" + "renesas,i2c-r8a7792" + "renesas,i2c-r8a7793" + "renesas,i2c-r8a7794" - reg: physical base address of the controller and length of memory mapped region. - interrupts: interrupt specifier. diff --git a/Documentation/devicetree/bindings/i2c/i2c-sh_mobile.txt b/Documentation/devicetree/bindings/i2c/i2c-sh_mobile.txt new file mode 100644 index 000000000000..d2153ce36fa8 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-sh_mobile.txt @@ -0,0 +1,26 @@ +Device tree configuration for Renesas IIC (sh_mobile) driver + +Required properties: +- compatible : "renesas,iic-<soctype>". "renesas,rmobile-iic" as fallback +- reg : address start and address range size of device +- interrupts : interrupt of device +- clocks : clock for device +- #address-cells : should be <1> +- #size-cells : should be <0> + +Optional properties: +- clock-frequency : frequency of bus clock in Hz. Default 100kHz if unset. + +Pinctrl properties might be needed, too. See there. + +Example: + + iic0: i2c@e6500000 { + compatible = "renesas,iic-r8a7790", "renesas,rmobile-iic"; + reg = <0 0xe6500000 0 0x425>; + interrupts = <0 174 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp3_clks R8A7790_CLK_IIC0>; + clock-frequency = <400000>; + #address-cells = <1>; + #size-cells = <0>; + }; diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt b/Documentation/devicetree/bindings/i2c/trivial-devices.txt index 71724d026ffa..bef86e57c388 100644 --- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt +++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt @@ -13,8 +13,22 @@ ad,ad7414 SMBus/I2C Digital Temperature Sensor in 6-Pin SOT with SMBus Alert an ad,adm9240 ADM9240: Complete System Hardware Monitor for uProcessor-Based Systems adi,adt7461 +/-1C TDM Extended Temp Range I.C adt7461 +/-1C TDM Extended Temp Range I.C +adi,adt7473 +/-1C TDM Extended Temp Range I.C +adi,adt7475 +/-1C TDM Extended Temp Range I.C +adi,adt7476 +/-1C TDM Extended Temp Range I.C +adi,adt7490 +/-1C TDM Extended Temp Range I.C at,24c08 i2c serial eeprom (24cxx) +atmel,24c00 i2c serial eeprom (24cxx) +atmel,24c01 i2c serial eeprom (24cxx) atmel,24c02 i2c serial eeprom (24cxx) +atmel,24c04 i2c serial eeprom (24cxx) +atmel,24c16 i2c serial eeprom (24cxx) +atmel,24c32 i2c serial eeprom (24cxx) +atmel,24c64 i2c serial eeprom (24cxx) +atmel,24c128 i2c serial eeprom (24cxx) +atmel,24c256 i2c serial eeprom (24cxx) +atmel,24c512 i2c serial eeprom (24cxx) +atmel,24c1024 i2c serial eeprom (24cxx) atmel,at97sc3204t i2c trusted platform module (TPM) capella,cm32181 CM32181: Ambient Light Sensor catalyst,24c32 i2c serial eeprom @@ -46,8 +60,10 @@ maxim,ds1050 5 Bit Programmable, Pulse-Width Modulator maxim,max1237 Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs maxim,max6625 9-Bit/12-Bit Temperature Sensors with I²C-Compatible Serial Interface mc,rv3029c2 Real Time Clock Module with I2C-Bus +national,lm63 Temperature sensor with integrated fan control national,lm75 I2C TEMP SENSOR national,lm80 Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor +national,lm85 Temperature sensor with integrated fan control national,lm92 ±0.33°C Accurate, 12-Bit + Sign Temperature Sensor and Thermal Window Comparator with Two-Wire Interface nuvoton,npct501 i2c trusted platform module (TPM) nxp,pca9556 Octal SMBus and I2C registered interface |
