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Merge tag 'tegra-for-3.10-dt' of git://git.kernel.org/pub/scm/linux/k…
…ernel/git/swarren/linux-tegra into next/dt2 From Stephen Warren <swarren@wwwdotorg.org>: ARM: tegra: device tree changes This branch contains the majority of the device tree changes for Tegra. Highlights include: * Many changes for Tegra114, and the Dalmore board, to enable pinctrl, SDHCI/MMC, PWM, DMA, I2C, KBC, SPI, battery, regulators. * Adding or enabling suspend wakeup sources on many boards, and adding suspend timing parameters, to support the system suspend patches. * Adding clocks to the audio-related nodes, so that in 3.11, the audio driver can pull these clocks from device tree rather than hard-coding clock names. * Some small DT fixes/cleanup. This branch is based on the previous clk pull request. * tag 'tegra-for-3.10-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra: (25 commits) clk: tegra: Fix cdev1 and cdev2 IDs ARM: dts: tegra: add the PM configurations of PMC ARM: tegra: add non-removable and keep-power-in-suspend property for MMC ARM: tegra: whistler: add wakeup source for KBC ARM: tegra: add power gpio keys to DT ARM: tegra: keep power on to SD slot on Dalmore ARM: tegra: add clocks property to AC'97 sound nodes ARM: tegra: add clocks property to sound nodes ARM: tegra: dalmore: add fixed regulator node ARM: tegra: dalmore: add TPS65090 node ARM: tegra: dalmore: add cpu regulator node ARM: tegra: Add sbs-battery node to Dalmore ARM: tegra: add DT binding for i2c-tegra ARM: tegra: add SPI nodes to Tegra114 DT ARM: tegra: add KBC nodes to Tegra114 DT ARM: tegra: add aliases and DMA requestor for serial nodes of Tegra114 ARM: tegra: add I2C nodes to Tegra114 DT ARM: tegra: add APB DMA nodes to Tegra114 DT ARM: tegra: add PWM nodes to Tegra114 DT ARM: tegra: fix the status of PWM DT nodes ... Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt
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NVIDIA Tegra20/Tegra30/Tegra114 I2C controller driver. | ||
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Required properties: | ||
- compatible : should be: | ||
"nvidia,tegra114-i2c" | ||
"nvidia,tegra30-i2c" | ||
"nvidia,tegra20-i2c" | ||
"nvidia,tegra20-i2c-dvc" | ||
Details of compatible are as follows: | ||
nvidia,tegra20-i2c-dvc: Tegra20 has specific I2C controller called as DVC I2C | ||
controller. This only support master mode of I2C communication. Register | ||
interface/offset and interrupts handling are different than generic I2C | ||
controller. Driver of DVC I2C controller is only compatible with | ||
"nvidia,tegra20-i2c-dvc". | ||
nvidia,tegra20-i2c: Tegra20 has 4 generic I2C controller. This can support | ||
master and slave mode of I2C communication. The i2c-tegra driver only | ||
support master mode of I2C communication. Driver of I2C controller is | ||
only compatible with "nvidia,tegra20-i2c". | ||
nvidia,tegra30-i2c: Tegra30 has 5 generic I2C controller. This controller is | ||
very much similar to Tegra20 I2C controller with additional feature: | ||
Continue Transfer Support. This feature helps to implement M_NO_START | ||
as per I2C core API transfer flags. Driver of I2C controller is | ||
compatible with "nvidia,tegra30-i2c" to enable the continue transfer | ||
support. This is also compatible with "nvidia,tegra20-i2c" without | ||
continue transfer support. | ||
nvidia,tegra114-i2c: Tegra114 has 5 generic I2C controller. This controller is | ||
very much similar to Tegra30 I2C controller with some hardware | ||
modification: | ||
- Tegra30/Tegra20 I2C controller has 2 clock source called div-clk and | ||
fast-clk. Tegra114 has only one clock source called as div-clk and | ||
hence clock mechanism is changed in I2C controller. | ||
- Tegra30/Tegra20 I2C controller has enabled per packet transfer by | ||
default and there is no way to disable it. Tegra114 has this | ||
interrupt disable by default and SW need to enable explicitly. | ||
Due to above changes, Tegra114 I2C driver makes incompatible with | ||
previous hardware driver. Hence, tegra114 I2C controller is compatible | ||
with "nvidia,tegra114-i2c". | ||
- reg: Should contain I2C controller registers physical address and length. | ||
- interrupts: Should contain I2C controller interrupts. | ||
- address-cells: Address cells for I2C device address. | ||
- size-cells: Size of the I2C device address. | ||
- clocks: Clock ID as per | ||
Documentation/devicetree/bindings/clock/tegra<chip-id>.txt | ||
for I2C controller. | ||
- clock-names: Name of the clock: | ||
Tegra20/Tegra30 I2C controller: "div-clk and "fast-clk". | ||
Tegra114 I2C controller: "div-clk". | ||
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Example: | ||
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i2c@7000c000 { | ||
compatible = "nvidia,tegra20-i2c"; | ||
reg = <0x7000c000 0x100>; | ||
interrupts = <0 38 0x04>; | ||
#address-cells = <1>; | ||
#size-cells = <0>; | ||
clocks = <&tegra_car 12>, <&tegra_car 124>; | ||
clock-names = "div-clk", "fast-clk"; | ||
status = "disabled"; | ||
}; |
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