diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-27 23:41:24 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-27 23:41:24 (GMT) |
commit | 34800598b2eebe061445216473b1e4c2ff5cba99 (patch) | |
tree | a6d0eb6fe45d9480888d7ddb34840e172ed80e56 /Documentation/devicetree/bindings | |
parent | 46b407ca4a6149c8d27fcec1881d4f184bec7c77 (diff) | |
parent | 511f1cb6d426938fabf9c6d69ce4861b66ffd919 (diff) | |
download | linux-34800598b2eebe061445216473b1e4c2ff5cba99.tar.xz |
Merge tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull "ARM: driver specific updates" from Arnd Bergmann:
"These are all specific to some driver. They are typically the
platform side of a change in the drivers directory, such as adding a
new driver or extending the interface to the platform. In cases where
there is no maintainer for the driver, or the maintainer prefers to
have the platform changes in the same branch as the driver changes,
the patches to the drivers are included as well.
A much smaller set of driver updates that depend on other branches
getting merged first will be sent later.
The new export of tegra_chip_uid conflicts with other changes in
fuse.c. In rtc-sa1100.c, the global removal of IRQF_DISABLED
conflicts with the cleanup of the interrupt handling of that driver.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>"
Fixed up aforementioned trivial conflicts.
* tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (94 commits)
ARM: SAMSUNG: change the name from s3c-sdhci to exynos4-sdhci
mmc: sdhci-s3c: add platform data for the second capability
ARM: SAMSUNG: support the second capability for samsung-soc
ARM: EXYNOS: add support DMA for EXYNOS4X12 SoC
ARM: EXYNOS: Add apb_pclk clkdev entry for mdma1
ARM: EXYNOS: Enable MDMA driver
regulator: Remove bq24022 regulator driver
rtc: sa1100: add OF support
pxa: magician/hx4700: Convert to gpio-regulator from bq24022
ARM: OMAP3+: SmartReflex: fix error handling
ARM: OMAP3+: SmartReflex: fix the use of debugfs_create_* API
ARM: OMAP3+: SmartReflex: micro-optimization for sanity check
ARM: OMAP3+: SmartReflex: misc cleanups
ARM: OMAP3+: SmartReflex: move late_initcall() closer to its argument
ARM: OMAP3+: SmartReflex: add missing platform_set_drvdata()
ARM: OMAP3+: hwmod: add SmartReflex IRQs
ARM: OMAP3+: SmartReflex: clear ERRCONFIG_VPBOUNDINTST only on a need
ARM: OMAP3+: SmartReflex: Fix status masking in ERRCONFIG register
ARM: OMAP3+: SmartReflex: Add a shutdown hook
ARM: OMAP3+: SmartReflex Class3: disable errorgen before disable VP
...
Conflicts:
arch/arm/mach-tegra/Makefile
arch/arm/mach-tegra/fuse.c
drivers/rtc/rtc-sa1100.c
Diffstat (limited to 'Documentation/devicetree/bindings')
4 files changed, 183 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/arm/tegra/emc.txt b/Documentation/devicetree/bindings/arm/tegra/emc.txt new file mode 100644 index 0000000..09335f8 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/tegra/emc.txt @@ -0,0 +1,100 @@ +Embedded Memory Controller + +Properties: +- name : Should be emc +- #address-cells : Should be 1 +- #size-cells : Should be 0 +- compatible : Should contain "nvidia,tegra20-emc". +- reg : Offset and length of the register set for the device +- nvidia,use-ram-code : If present, the sub-nodes will be addressed + and chosen using the ramcode board selector. If omitted, only one + set of tables can be present and said tables will be used + irrespective of ram-code configuration. + +Child device nodes describe the memory settings for different configurations and clock rates. + +Example: + + emc@7000f400 { + #address-cells = < 1 >; + #size-cells = < 0 >; + compatible = "nvidia,tegra20-emc"; + reg = <0x7000f4000 0x200>; + } + + +Embedded Memory Controller ram-code table + +If the emc node has the nvidia,use-ram-code property present, then the +next level of nodes below the emc table are used to specify which settings +apply for which ram-code settings. + +If the emc node lacks the nvidia,use-ram-code property, this level is omitted +and the tables are stored directly under the emc node (see below). + +Properties: + +- name : Should be emc-tables +- nvidia,ram-code : the binary representation of the ram-code board strappings + for which this node (and children) are valid. + + + +Embedded Memory Controller configuration table + +This is a table containing the EMC register settings for the various +operating speeds of the memory controller. They are always located as +subnodes of the emc controller node. + +There are two ways of specifying which tables to use: + +* The simplest is if there is just one set of tables in the device tree, + and they will always be used (based on which frequency is used). + This is the preferred method, especially when firmware can fill in + this information based on the specific system information and just + pass it on to the kernel. + +* The slightly more complex one is when more than one memory configuration + might exist on the system. The Tegra20 platform handles this during + early boot by selecting one out of possible 4 memory settings based + on a 2-pin "ram code" bootstrap setting on the board. The values of + these strappings can be read through a register in the SoC, and thus + used to select which tables to use. + +Properties: +- name : Should be emc-table +- compatible : Should contain "nvidia,tegra20-emc-table". +- reg : either an opaque enumerator to tell different tables apart, or + the valid frequency for which the table should be used (in kHz). +- clock-frequency : the clock frequency for the EMC at which this + table should be used (in kHz). +- nvidia,emc-registers : a 46 word array of EMC registers to be programmed + for operation at the 'clock-frequency' setting. + The order and contents of the registers are: + RC, RFC, RAS, RP, R2W, W2R, R2P, W2P, RD_RCD, WR_RCD, RRD, REXT, + WDV, QUSE, QRST, QSAFE, RDV, REFRESH, BURST_REFRESH_NUM, PDEX2WR, + PDEX2RD, PCHG2PDEN, ACT2PDEN, AR2PDEN, RW2PDEN, TXSR, TCKE, TFAW, + TRPAB, TCLKSTABLE, TCLKSTOP, TREFBW, QUSE_EXTRA, FBIO_CFG6, ODT_WRITE, + ODT_READ, FBIO_CFG5, CFG_DIG_DLL, DLL_XFORM_DQS, DLL_XFORM_QUSE, + ZCAL_REF_CNT, ZCAL_WAIT_CNT, AUTO_CAL_INTERVAL, CFG_CLKTRIM_0, + CFG_CLKTRIM_1, CFG_CLKTRIM_2 + + emc-table@166000 { + reg = <166000>; + compatible = "nvidia,tegra20-emc-table"; + clock-frequency = < 166000 >; + nvidia,emc-registers = < 0 0 0 0 0 0 0 0 0 0 0 0 0 0 + 0 0 0 0 0 0 0 0 0 0 0 0 0 0 + 0 0 0 0 0 0 0 0 0 0 0 0 0 0 + 0 0 0 0 >; + }; + + emc-table@333000 { + reg = <333000>; + compatible = "nvidia,tegra20-emc-table"; + clock-frequency = < 333000 >; + nvidia,emc-registers = < 0 0 0 0 0 0 0 0 0 0 0 0 0 0 + 0 0 0 0 0 0 0 0 0 0 0 0 0 0 + 0 0 0 0 0 0 0 0 0 0 0 0 0 0 + 0 0 0 0 >; + }; diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt new file mode 100644 index 0000000..b5846e2 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt @@ -0,0 +1,19 @@ +NVIDIA Tegra Power Management Controller (PMC) + +Properties: +- name : Should be pmc +- compatible : Should contain "nvidia,tegra<chip>-pmc". +- reg : Offset and length of the register set for the device +- nvidia,invert-interrupt : If present, inverts the PMU interrupt signal. + The PMU is an external Power Management Unit, whose interrupt output + signal is fed into the PMC. This signal is optionally inverted, and then + fed into the ARM GIC. The PMC is not involved in the detection or + handling of this interrupt signal, merely its inversion. + +Example: + +pmc@7000f400 { + compatible = "nvidia,tegra20-pmc"; + reg = <0x7000e400 0x400>; + nvidia,invert-interrupt; +}; diff --git a/Documentation/devicetree/bindings/dma/tegra20-apbdma.txt b/Documentation/devicetree/bindings/dma/tegra20-apbdma.txt new file mode 100644 index 0000000..90fa7da --- /dev/null +++ b/Documentation/devicetree/bindings/dma/tegra20-apbdma.txt @@ -0,0 +1,30 @@ +* NVIDIA Tegra APB DMA controller + +Required properties: +- compatible: Should be "nvidia,<chip>-apbdma" +- reg: Should contain DMA registers location and length. This shuld include + all of the per-channel registers. +- interrupts: Should contain all of the per-channel DMA interrupts. + +Examples: + +apbdma: dma@6000a000 { + compatible = "nvidia,tegra20-apbdma"; + reg = <0x6000a000 0x1200>; + interrupts = < 0 136 0x04 + 0 137 0x04 + 0 138 0x04 + 0 139 0x04 + 0 140 0x04 + 0 141 0x04 + 0 142 0x04 + 0 143 0x04 + 0 144 0x04 + 0 145 0x04 + 0 146 0x04 + 0 147 0x04 + 0 148 0x04 + 0 149 0x04 + 0 150 0x04 + 0 151 0x04 >; +}; diff --git a/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt b/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt index eb4b530..023c952 100644 --- a/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt +++ b/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt @@ -1,8 +1,40 @@ -NVIDIA Tegra 2 GPIO controller +NVIDIA Tegra GPIO controller Required properties: -- compatible : "nvidia,tegra20-gpio" +- compatible : "nvidia,tegra<chip>-gpio" +- reg : Physical base address and length of the controller's registers. +- interrupts : The interrupt outputs from the controller. For Tegra20, + there should be 7 interrupts specified, and for Tegra30, there should + be 8 interrupts specified. - #gpio-cells : Should be two. The first cell is the pin number and the second cell is used to specify optional parameters: - bit 0 specifies polarity (0 for normal, 1 for inverted) - gpio-controller : Marks the device node as a GPIO controller. +- #interrupt-cells : Should be 2. + The first cell is the GPIO number. + The second cell is used to specify flags: + bits[3:0] trigger type and level flags: + 1 = low-to-high edge triggered. + 2 = high-to-low edge triggered. + 4 = active high level-sensitive. + 8 = active low level-sensitive. + Valid combinations are 1, 2, 3, 4, 8. +- interrupt-controller : Marks the device node as an interrupt controller. + +Example: + +gpio: gpio@6000d000 { + compatible = "nvidia,tegra20-gpio"; + reg = < 0x6000d000 0x1000 >; + interrupts = < 0 32 0x04 + 0 33 0x04 + 0 34 0x04 + 0 35 0x04 + 0 55 0x04 + 0 87 0x04 + 0 89 0x04 >; + #gpio-cells = <2>; + gpio-controller; + #interrupt-cells = <2>; + interrupt-controller; +}; |