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/linux/drivers/devfreq/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
3 bool "Generic Dynamic Voltage and Frequency Scaling (DVFS) support"
9 operating frequency based on the device driver's policy.
19 clock frequency of the device, which is also attached
20 to a device by 1-to-1. The device registering devfreq takes the
21 responsibility to "interpret" the representative frequency and
37 Chooses frequency based on the recent load on the device. Works
39 Simple-Ondemand should be able to provide busy/total counter
46 Sets the frequency at the maximum available frequency.
47 This governor always returns UINT_MAX as frequency so that
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/linux/Documentation/devicetree/bindings/i2c/
H A Dopencores,i2c-ocores.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/i2c/opencores,i2c-ocores.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Peter Korsgaard <peter@korsgaard.com>
11 - Andrew Lunn <andrew@lunn.ch>
14 - $ref: /schemas/i2c/i2c-controller.yaml#
19 - items:
20 - enum:
21 - sifive,fu740-c000-i2c # Opencore based IP block FU740-C000 SoC
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H A Daspeed,i2c.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rayn Chen <rayn_chen@aspeedtech.com>
13 - $ref: /schemas/i2c/i2c-controller.yaml#
18 - aspeed,ast2400-i2c-bus
19 - aspeed,ast2500-i2c-bus
20 - aspeed,ast2600-i2c-bus
25 - description: address offset and range of bus
26 - description: address offset and range of bus buffer
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H A Di2c-pca-platform.txt4 parallel-bus microcontrollers/microprocessors and the serial I2C-bus
5 and allows the parallel bus system to communicate bi-directionally
6 with the I2C-bus.
10 - reg : Offset and length of the register set for the device
11 - compatible : one of "nxp,pca9564" or "nxp,pca9665"
14 - interrupts : the interrupt number
15 - reset-gpios : gpio specifier for gpio connected to RESET_N pin. As the line
17 - clock-frequency : I2C bus frequency.
22 #address-cells = <1>;
23 #size-cells = <0>;
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H A Di2c-opal.txt1 Device-tree bindings for I2C OPAL driver
2 ----------------------------------------
6 perspective, the properties of use are "ibm,port-name" and "ibm,opal-id".
10 - reg: Port-id within a given master
11 - compatible: must be "ibm,opal-i2c"
12 - ibm,opal-id: Refers to a specific bus and used to identify it when calling
14 - bus-frequency: Operating frequency of the i2c bus (in HZ). Informational for
18 - ibm,port-name: Firmware provides this name that uniquely identifies the i2c
23 a P8 on-chip bus.
27 i2c-bus@0 {
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/linux/arch/arm64/boot/dts/mediatek/
H A Dmt8186-evb.dts1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
5 /dts-v1/;
10 chassis-type = "embedded";
11 compatible = "mediatek,mt8186-evb", "mediatek,mt8186";
18 stdout-path = "serial0:921600n8";
30 clock-frequency = <400000>;
31 pinctrl-names = "default";
32 pinctrl-0 = <&i2c0_pins>;
38 clock-frequency = <400000>;
39 i2c-scl-internal-delay-ns = <8000>;
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H A Dmt8188-evb.dts1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
5 /dts-v1/;
11 compatible = "mediatek,mt8188-evb", "mediatek,mt8188";
26 stdout-path = "serial0:115200n8";
34 reserved_memory: reserved-memory {
35 #address-cells = <2>;
36 #size-cells = <2>;
40 compatible = "shared-dma-pool";
42 no-map;
52 pinctrl-names = "default";
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/linux/drivers/staging/iio/Documentation/
H A Dsysfs-bus-iio-dds2 What: /sys/bus/iio/devices/.../out_altvoltageX_frequencyY
4 Contact: linux-iio@vger.kernel.org
6 Stores frequency into tuning word Y.
8 which allows for pin controlled FSK Frequency Shift Keying
13 What: /sys/bus/iio/devices/.../out_altvoltageX_frequencyY_scale
15 Contact: linux-iio@vger.kernel.org
18 obtain the desired value in Hz. If shared across all frequency
22 What: /sys/bus/iio/devices/.../out_altvoltageX_frequencysymbol
24 Contact: linux-iio@vger.kernel.org
26 Specifies the active output frequency tuning word. The value
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/linux/Documentation/ABI/testing/
H A Dsysfs-bus-iio-impedance-analyzer-ad59331 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency_start
4 Contact: linux-iio@vger.kernel.org
6 Frequency sweep start frequency in Hz.
8 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency_increment
11 Contact: linux-iio@vger.kernel.org
13 Frequency increment in Hz (step size) between consecutive
14 frequency points along the sweep.
16 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency_points
19 Contact: linux-iio@vger.kernel.org
21 Number of frequency points (steps) in the frequency sweep.
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H A Dsysfs-platform-dptf1 What: /sys/bus/platform/devices/INT3407:00/dptf_power/charger_type
4 Contact: linux-acpi@vger.kernel.org
6 (RO) The charger type - Traditional, Hybrid or NVDC.
8 What: /sys/bus/platform/devices/INT3407:00/dptf_power/adapter_rating_mw
11 Contact: linux-acpi@vger.kernel.org
16 What: /sys/bus/platform/devices/INT3407:00/dptf_power/max_platform_power_mw
19 Contact: linux-acpi@vger.kernel.org
24 What: /sys/bus/platform/devices/INT3407:00/dptf_power/platform_power_source
27 Contact: linux-acpi@vger.kernel.org
33 - 0x00 = DC
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H A Dsysfs-driver-intel-xe-hwmon1 What: /sys/bus/pci/drivers/xe/.../hwmon/hwmon<i>/power1_max
4 Contact: intel-xe@lists.freedesktop.org
7 The power controller will throttle the operating frequency
15 What: /sys/bus/pci/drivers/xe/.../hwmon/hwmon<i>/power1_rated_max
18 Contact: intel-xe@lists.freedesktop.org
24 What: /sys/bus/pci/drivers/xe/.../hwmon/hwmon<i>/energy1_input
27 Contact: intel-xe@lists.freedesktop.org
32 What: /sys/bus/pci/drivers/xe/.../hwmon/hwmon<i>/power1_max_interval
35 Contact: intel-xe@lists.freedesktop.org
41 What: /sys/bus/pci/drivers/xe/.../hwmon/hwmon<i>/power2_max
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H A Dsysfs-bus-iio-dac-ltc26881 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_en
3 Contact: linux-iio@vger.kernel.org
8 - disable dither operation;
9 - change dither parameters (eg: frequency, phase...);
10 - enabled dither operation
12 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_raw
14 Contact: linux-iio@vger.kernel.org
20 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_raw_available
22 Contact: linux-iio@vger.kernel.org
26 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_offset
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/linux/arch/powerpc/sysdev/
H A Dmpc5xxx_clocks.c1 // SPDX-License-Identifier: GPL-2.0
10 * mpc5xxx_fwnode_get_bus_frequency - Find the bus frequency for a firmware node
13 * Returns bus frequency (IPS on MPC512x, IPB on MPC52xx),
14 * or 0 if the bus frequency cannot be found.
22 ret = fwnode_property_read_u32(fwnode, "bus-frequency", &bus_freq); in mpc5xxx_fwnode_get_bus_frequency()
27 ret = fwnode_property_read_u32(parent, "bus-frequency", &bus_freq); in mpc5xxx_fwnode_get_bus_frequency()
/linux/arch/arm/boot/dts/broadcom/
H A Dbcm2166x-common.dtsi1 // SPDX-License-Identifier: BSD-3-Clause
9 /dts-v1/;
11 #include <dt-bindings/clock/bcm21664.h>
12 #include <dt-bindings/interrupt-controller/arm-gic.h>
13 #include <dt-bindings/interrupt-controller/irq.h>
16 #address-cells = <1>;
17 #size-cells = <1>;
19 /* Hub bus */
20 hub: hub-bus@34000000 {
21 compatible = "simple-bus";
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/linux/Documentation/devicetree/bindings/memory-controllers/
H A Drockchip,rk3399-dmc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/rockchip,rk3399-dmc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Brian Norris <briannorris@chromium.org>
15 - rockchip,rk3399-dmc
17 devfreq-events:
26 clock-names:
28 - const: dmc_clk
30 operating-points-v2: true
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/linux/drivers/net/ethernet/xilinx/
H A Dxilinx_axienet_mdio.c1 // SPDX-License-Identifier: GPL-2.0
3 * MDIO bus driver for the Xilinx Axi Ethernet device
6 * Copyright (c) 2010 - 2011 Michal Simek <monstr@monstr.eu>
7 * Copyright (c) 2010 - 2011 PetaLogix
9 * Copyright (c) 2010 - 2012 Xilinx, Inc. All rights reserved.
24 * axienet_mdio_wait_until_ready - MDIO wait function
41 * axienet_mdio_mdc_enable - MDIO MDC enable function
49 ((u32)lp->mii_clk_div | XAE_MDIO_MC_MDIOEN_MASK)); in axienet_mdio_mdc_enable()
53 * axienet_mdio_mdc_disable - MDIO MDC disable function
68 * axienet_mdio_read - MDIO interface read function
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/linux/Documentation/devicetree/bindings/soc/fsl/cpm_qe/
H A Dfsl,qe.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Frank Li <Frank.Li@nxp.com>
18 Basically, it is a bus of devices, that could act more or less
27 - const: fsl,qe
28 - const: simple-bus
40 bus-frequency:
42 description: the clock frequency for QUICC Engine.
44 fsl,qe-num-riscs:
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/linux/arch/arm/boot/dts/aspeed/
H A Daspeed-bmc-delta-ahe50dc.dts1 // SPDX-License-Identifier: GPL-2.0+
2 /dts-v1/;
4 #include "aspeed-g4.dtsi"
5 #include <dt-bindings/gpio/aspeed-gpio.h>
9 compatible = "regulator-output"; \
10 vout-supply = <&efuse##n>; \
19 shunt-resistor-micro-ohms = <675>; \
22 regulator-name = __stringify(efuse##num##-reg); \
28 model = "Delta Power AHE-50DC";
29 compatible = "delta,ahe50dc-bmc", "aspeed,ast2400";
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/linux/Documentation/devicetree/bindings/mmc/
H A Dcavium-mmc.txt10 - compatible : should be one of:
11 cavium,octeon-6130-mmc
12 cavium,octeon-7890-mmc
13 cavium,thunder-8190-mmc
14 cavium,thunder-8390-mmc
15 mmc-slot
16 - reg : mmc controller base registers
17 - clocks : phandle
20 - for cd, bus-width and additional generic mmc parameters
22 - cavium,cmd-clk-skew : number of coprocessor clocks before sampling command
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/linux/Documentation/driver-api/thermal/
H A Dintel_dptf.rst1 .. SPDX-License-Identifier: GPL-2.0
12 ------------
31 ----------------------------
33 :file:`/sys/bus/platform/devices/<N>/uuids`, where <N>
43 "42A441D6-AE6A-462b-A84B-4A8CE79027D3" : Passive 1
45 "3A95C389-E4B8-4629-A526-C52C88626BAE" : Active
47 "97C68AE7-15FA-499c-B8C9-5DA81D606E0A" : Critical
49 "63BE270F-1C11-48FD-A6F7-3AF253FF3E2D" : Adaptive performance
51 "5349962F-71E6-431D-9AE8-0A635B710AEE" : Emergency call
53 "9E04115A-AE87-4D1C-9500-0F3E340BFE75" : Passive 2
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/linux/Documentation/devicetree/bindings/interconnect/
H A Dsamsung,exynos-bus.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/interconnect/samsung,exynos-bus.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Samsung Exynos SoC Bus and Interconnect
10 - Chanwoo Choi <cw00.choi@samsung.com>
11 - Krzysztof Kozlowski <krzk@kernel.org>
15 sub-blocks in SoC. Most Exynos SoCs share the common architecture for buses.
16 Generally, each bus of Exynos SoC includes a source clock and a power line,
17 which are able to change the clock frequency of the bus in runtime. To
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/linux/Documentation/devicetree/bindings/media/
H A Dsamsung,s5c73m3.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
11 - Sylwester Nawrocki <s.nawrocki@samsung.com>
14 The S5C73M3 camera ISP supports MIPI CSI-2 and parallel (ITU-R BT.656)
15 video data busses. The I2C bus is the main control bus and additionally the
16 SPI bus is used, mostly for transferring the firmware to and from the
17 device. Two slave device nodes corresponding to these control bus
18 interfaces are required and should be placed under respective bus
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/linux/arch/arm64/boot/dts/freescale/
H A Dfsl-ls1088a-qds.dts1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
11 /dts-v1/;
13 #include "fsl-ls1088a.dtsi"
17 compatible = "fsl,ls1088a-qds", "fsl,ls1088a";
21 bus-num = <0>;
25 #address-cells = <1>;
26 #size-cells = <1>;
27 compatible = "jedec,spi-nor";
29 spi-max-frequency = <1000000>;
33 #address-cells = <1>;
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H A Dfsl-ls1028a-qds.dts1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
11 /dts-v1/;
13 #include "fsl-ls1028a.dtsi"
17 compatible = "fsl,ls1028a-qds", "fsl,ls1028a";
32 stdout-path = "serial0:115200n8";
40 sys_mclk: clock-mclk {
41 compatible = "fixed-clock";
42 #clock-cells = <0>;
43 clock-frequency = <25000000>;
46 reg_1p8v: regulator-1p8v {
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/linux/Documentation/devicetree/bindings/soc/fsl/cpm_qe/cpm/
H A Di2c.txt3 The I2C controller is expressed as a bus under the CPM node.
6 - compatible : "fsl,cpm1-i2c", "fsl,cpm2-i2c"
7 - reg : On CPM2 devices, the second resource doesn't specify the I2C
10 - #address-cells : Should be one. The cell is the i2c device address with
12 - #size-cells : Should be zero.
13 - clock-frequency : Can be used to set the i2c clock frequency. If
14 unspecified, a default frequency of 60kHz is being used.
16 i2c drivers to find the bus to probe:
17 - linux,i2c-index : Can be used to hard code an i2c bus number. By default,
18 the bus number is dynamically assigned by the i2c core.
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