diff options
Diffstat (limited to 'qemu/roms/u-boot/doc/device-tree-bindings/exynos')
4 files changed, 147 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/doc/device-tree-bindings/exynos/dwmmc.txt b/qemu/roms/u-boot/doc/device-tree-bindings/exynos/dwmmc.txt new file mode 100644 index 000000000..566da3b63 --- /dev/null +++ b/qemu/roms/u-boot/doc/device-tree-bindings/exynos/dwmmc.txt @@ -0,0 +1,54 @@ +* Exynos 5250 DWC_mobile_storage + +The Exynos 5250 provides DWC_mobile_storage interface which supports +. Embedded Multimedia Cards (EMMC-version 4.5) +. Secure Digital memory (SD mem-version 2.0) +. Secure Digital I/O (SDIO-version 3.0) +. Consumer Electronics Advanced Transport Architecture (CE-ATA-version 1.1) + +The Exynos 5250 DWC_mobile_storage provides four channels. +SOC specific and Board specific properties are channel specific. + +Required SoC Specific Properties: + +- compatible: should be + - samsung,exynos5250-dwmmc: for exynos5250 platforms + +- reg: physical base address of the controller and length of memory mapped + region. + +- interrupts: The interrupt number to the cpu. + +Required Board Specific Properties: + +- #address-cells: should be 1. +- #size-cells: should be 0. +- samsung,bus-width: The width of the bus used to interface the devices + supported by DWC_mobile_storage (SD-MMC/EMMC/SDIO). + . Typically the bus width is 4 or 8. +- samsung,timing: The timing values to be written into the + Drv/sample clock selection register of corresponding channel. + . It is comprised of 3 values corresponding to the 3 fileds + 'SelClk_sample', 'SelClk_drv' and 'DIVRATIO' of CLKSEL register. + . SelClk_sample: Select sample clock among 8 shifted clocks. + . SelClk_drv: Select drv clock among 8 shifted clocks. + . DIVRATIO: Clock Divide ratio select. + . The above 3 values are used by the clock phase shifter. + +Example: + +mmc@12200000 { + samsung,bus-width = <8>; + samsung,timing = <1 3 3>; + samsung,removable = <1>; +} +In the above example, + . The bus width is 8 + . Timing is comprised of 3 values as explained below + 1 - SelClk_sample + 3 - SelClk_drv + 3 - DIVRATIO + . The 'removable' flag indicates whether the the particilar device + cannot be removed (always present) or it is a removable device. + 1 - Indicates that the device is removable. + 0 - Indicates that the device cannot be removed. diff --git a/qemu/roms/u-boot/doc/device-tree-bindings/exynos/isp-spi.txt b/qemu/roms/u-boot/doc/device-tree-bindings/exynos/isp-spi.txt new file mode 100644 index 000000000..b8086e82b --- /dev/null +++ b/qemu/roms/u-boot/doc/device-tree-bindings/exynos/isp-spi.txt @@ -0,0 +1,22 @@ +Exynos ISP SPI Subsystem + +The device node for ISP SPI subsytem. +Since Peripheral id in EXYNOS is decoded based on Interrupts, currently +ISP SPI have no individual interrupts hence we add ad dummy interrupt node +which will have a value beyond the maximum number of interrupts exynos5 can +support. + +Required properties : + - compatible : Should be "samsung,exynos-spi" for spi. + - reg : Base adrress of the the subsystem. + - interrupts : A value which is beyond the maximum number of interrupts +exynos5 can support. + +Example: +spi@131a0000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "samsung,exynos-spi"; + reg = <0x131a0000 0x30>; + interrupts = <0 129 0>; +}; diff --git a/qemu/roms/u-boot/doc/device-tree-bindings/exynos/sound.txt b/qemu/roms/u-boot/doc/device-tree-bindings/exynos/sound.txt new file mode 100644 index 000000000..98d1798d0 --- /dev/null +++ b/qemu/roms/u-boot/doc/device-tree-bindings/exynos/sound.txt @@ -0,0 +1,27 @@ +Exynos Sound Subsystem + +The device node for sound subsytem which contains codec and i2s block +that is a part of Exynos5250 + +Required properties : + - compatible : Should be "samsung,exynos-sound" for sound + - samsung,i2s-epll-clock-frequency : epll clock output frequency in Hz + - samsung,i2s-sampling-rate : sampling rate, default is 48000 + - samsung,i2s-bits-per-sample : sample width, defalut is 16 bit + - samsung,i2s-channels : nummber of channels, default is 2 + - samsung,i2s-lr-clk-framesize : lr clock frame size + - samsung,i2s-bit-clk-framesize : bit clock frame size + - samsung,codec-type : sound codec type + +Example: + +sound@12d60000 { + compatible = "samsung,exynos-sound" + samsung,i2s-epll-clock-frequency = <192000000>; + samsung,i2s-sampling-rate = <48000>; + samsung,i2s-bits-per-sample = <16>; + samsung,i2s-channels = <2>; + samsung,i2s-lr-clk-framesize = <256>; + samsung,i2s-bit-clk-framesize = <32>; + samsung,codec-type = "wm8994"; +}; diff --git a/qemu/roms/u-boot/doc/device-tree-bindings/exynos/tmu.txt b/qemu/roms/u-boot/doc/device-tree-bindings/exynos/tmu.txt new file mode 100644 index 000000000..89d3bf05f --- /dev/null +++ b/qemu/roms/u-boot/doc/device-tree-bindings/exynos/tmu.txt @@ -0,0 +1,44 @@ +Exynos Thermal management Unit + +Required properties: + + - compatible : Should be "samsung,exynos-tmu" for TMU + - samsung,min-temp : Minimum temperature value (25 degree celsius) + - Current temperature of SoC should be more than this value. + - samsung,max-temp : Maximum temperature value (125 degree celsius) + - Current temperature of SoC should be less than this value. + - samsung,start-warning : Temperature at which TMU starts giving warning (degree celsius) + - samsung,start-tripping : Temperature at which TMU shuts down the system (degree celsius) + - samsung,hw-tripping : Temperature at which hardware tripping should happen + in case TMU fails to power off (degree celsius) + - samsung,efuse-min-value : SOC efuse min value (Constant 40) + - efuse-value should be more than this value. + - samsung,efuse-value : SOC actual efuse value (Literal value) + - This is the data trimming info. + - This value is used to calculate measuring error. + - samsung,efuse-max-value : SoC max efuse value (Constant 100) + - efuse-value should be less than this value. + - samsung,slope : Default value 274761730 (Constant 0x1060_8802). + - This is the default value for TMU_CONTROL register. + - It sets the gain of amplifier to the positive-tc generator block. + - It selects thermal tripping mode and enables thermal tripping. + - samsung,dc-value : Measured data calibration value (Constant 25) + - Used for tempearture calculation. + - This is 25 because temperature measured is always above 25 degrees. + + +Example: + +tmu@10060000 { + compatible = "samsung,exynos-tmu" + samsung,min-temp = <25>; + samsung,max-temp = <125>; + samsung,start-warning = <95>; + samsung,start-tripping = <105>; + samsung,hw-tripping = <110>; + samsung,efuse-min-value = <40>; + samsung,efuse-value = <55>; + samsung,efuse-max-value = <100>; + samsung,slope = <274761730>; + samsung,dc-value = <25>; +}; |