| /Documentation/ABI/testing/ |
| D | sysfs-class-rtc | 1 What: /sys/class/rtc/
4 Contact: linux-rtc@vger.kernel.org
6 The rtc/ class subdirectory belongs to the RTC subsystem.
8 What: /sys/class/rtc/rtcX/
11 Contact: linux-rtc@vger.kernel.org
13 The /sys/class/rtc/rtc{0,1,2,3,...} directories correspond
14 to each RTC device.
16 What: /sys/class/rtc/rtcX/date
19 Contact: linux-rtc@vger.kernel.org
21 (RO) RTC-provided date in YYYY-MM-DD format
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| /Documentation/devicetree/bindings/rtc/ |
| D | allwinner,sun6i-a31-rtc.yaml | 4 $id: http://devicetree.org/schemas/rtc/allwinner,sun6i-a31-rtc.yaml#
7 title: Allwinner A31 RTC Device Tree Bindings
19 - const: allwinner,sun6i-a31-rtc
20 - const: allwinner,sun8i-a23-rtc
21 - const: allwinner,sun8i-h3-rtc
22 - const: allwinner,sun8i-r40-rtc
23 - const: allwinner,sun8i-v3-rtc
24 - const: allwinner,sun50i-h5-rtc
26 - const: allwinner,sun50i-a64-rtc
27 - const: allwinner,sun8i-h3-rtc
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| D | moxa,moxart-rtc.txt | 5 - compatible : Should be "moxa,moxart-rtc"
6 - gpio-rtc-sclk : RTC sclk gpio, with zero flags
7 - gpio-rtc-data : RTC data gpio, with zero flags
8 - gpio-rtc-reset : RTC reset gpio, with zero flags
12 rtc: rtc {
13 compatible = "moxa,moxart-rtc";
14 gpio-rtc-sclk = <&gpio 5 0>;
15 gpio-rtc-data = <&gpio 6 0>;
16 gpio-rtc-reset = <&gpio 7 0>;
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| D | s3c-rtc.yaml | 4 $id: http://devicetree.org/schemas/rtc/s3c-rtc.yaml#
16 - samsung,s3c2410-rtc
17 - samsung,s3c2416-rtc
18 - samsung,s3c2443-rtc
19 - samsung,s3c6410-rtc
20 - const: samsung,exynos3250-rtc
28 Must contain a list of phandle and clock specifier for the rtc
36 Must contain "rtc" and for a s3c6410 compatible controller
44 interrupt number is the rtc alarm interrupt and second interrupt number
45 is the rtc tick interrupt. The number of cells representing a interrupt
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| D | ingenic,rtc.yaml | 4 $id: http://devicetree.org/schemas/rtc/ingenic,rtc.yaml#
13 - $ref: rtc.yaml#
19 - ingenic,jz4740-rtc
20 - ingenic,jz4760-rtc
22 - const: ingenic,jz4725b-rtc
23 - const: ingenic,jz4740-rtc
26 - ingenic,jz4770-rtc
27 - ingenic,jz4780-rtc
28 - const: ingenic,jz4760-rtc
40 const: rtc
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| D | rtc-mt7622.txt | 1 Device-Tree bindings for MediaTek SoC based RTC
5 "mediatek,mt7622-rtc", "mediatek,soc-rtc" : for MT7622 SoC
7 - interrupts : Should contain the interrupt for RTC alarm;
10 - clock-names : Should contain "rtc" entries
14 rtc: rtc@10212800 {
15 compatible = "mediatek,mt7622-rtc",
16 "mediatek,soc-rtc";
20 clock-names = "rtc";
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| D | atmel,at91rm9200-rtc.yaml | 4 $id: http://devicetree.org/schemas/rtc/atmel,at91rm9200-rtc.yaml#
7 title: Atmel AT91 RTC Device Tree Bindings
10 - $ref: "rtc.yaml#"
18 - atmel,at91rm9200-rtc
19 - atmel,at91sam9x5-rtc
20 - atmel,sama5d4-rtc
21 - atmel,sama5d2-rtc
22 - microchip,sam9x60-rtc
43 rtc@fffffe00 {
44 compatible = "atmel,at91rm9200-rtc";
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| D | armada-380-rtc.txt | 3 RTC controller for the Armada 38x, 7K and 8K SoCs
7 "marvell,armada-380-rtc" for Armada 38x SoC
8 "marvell,armada-8k-rtc" for Aramda 7K/8K SoCs
12 * "rtc" for the RTC registers
13 * "rtc-soc" for the SoC related registers and among them the one
15 - interrupts: IRQ line for the RTC.
19 rtc@a3800 {
20 compatible = "marvell,armada-380-rtc";
22 reg-names = "rtc", "rtc-soc";
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| D | sa1100-rtc.yaml | 4 $id: http://devicetree.org/schemas/rtc/sa1100-rtc.yaml#
10 - $ref: rtc.yaml#
20 - mrvl,sa1100-rtc
21 - mrvl,mmp-rtc
37 - const: 'rtc 1Hz'
38 - const: 'rtc alarm'
50 rtc: rtc@d4010000 {
51 compatible = "mrvl,mmp-rtc";
54 interrupt-names = "rtc 1Hz", "rtc alarm";
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| D | rtc-omap.txt | 5 - "ti,da830-rtc" - for RTC IP used similar to that on DA8xx SoC family.
6 - "ti,am3352-rtc" - for RTC IP used similar to that on AM335x SoC family.
7 This RTC IP has special WAKE-EN Register to enable
11 - "ti,am4372-rtc" - for RTC IP used similar to that on AM437X SoC family.
12 - reg: Address range of rtc register set
13 - interrupts: rtc timer, alarm interrupts in order
16 - system-power-controller: whether the rtc is controlling the system power
18 - clocks: Any internal or external clocks feeding in to rtc
35 rtc@1c23000 {
36 compatible = "ti,da830-rtc";
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| D | allwinner,sun4i-a10-rtc.yaml | 4 $id: http://devicetree.org/schemas/rtc/allwinner,sun4i-a10-rtc.yaml#
7 title: Allwinner A10 RTC Device Tree Bindings
10 - $ref: "rtc.yaml#"
19 - allwinner,sun4i-a10-rtc
20 - allwinner,sun7i-a20-rtc
37 rtc: rtc@1c20d00 {
38 compatible = "allwinner,sun4i-a10-rtc";
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| D | rtc-meson.txt | 1 * Amlogic Meson6, Meson8, Meson8b and Meson8m2 RTC
5 * "amlogic,meson6-rtc"
6 * "amlogic,meson8-rtc"
7 * "amlogic,meson8b-rtc"
8 * "amlogic,meson8m2-rtc"
11 - interrupts: the interrupt line of the RTC block.
13 - vdd-supply: reference to the power supply of the RTC block.
25 rtc: rtc@740 {
26 compatible = "amlogic,meson6-rtc";
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| D | nxp,lpc1788-rtc.txt | 3 The LPC1788 RTC provides calendar and clock functionality
7 - compatible : must contain "nxp,lpc1788-rtc"
10 - clocks : Must contain clock specifiers for rtc and register clock
11 - clock-names : Must contain "rtc" and "reg"
15 rtc: rtc@40046000 {
16 compatible = "nxp,lpc1788-rtc";
20 clock-names = "rtc", "reg";
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| D | st,stm32-rtc.yaml | 4 $id: http://devicetree.org/schemas/rtc/st,stm32-rtc.yaml#
15 - st,stm32-rtc
16 - st,stm32h7-rtc
17 - st,stm32mp1-rtc
43 domain (RTC registers) write protection.
60 const: st,stm32-rtc
77 const: st,stm32h7-rtc
93 const: st,stm32mp1-rtc
119 rtc@40002800 {
120 compatible = "st,stm32-rtc";
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| D | spear-rtc.txt | 1 * SPEAr RTC
4 - compatible : "st,spear600-rtc"
5 - reg : Address range of the rtc registers
6 - interrupt: Should contain the rtc interrupt number
10 rtc@fc000000 {
11 compatible = "st,spear600-rtc";
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| D | rtc-mt6397.txt | 1 Device-Tree bindings for MediaTek PMIC based RTC
3 MediaTek PMIC based RTC is an independent function of MediaTek PMIC that works
4 as a type of multi-function device (MFD). The RTC can be configured and set up
16 "mediatek,mt6323-rtc": for MT6323 PMIC
17 "mediatek,mt6397-rtc": for MT6397 PMIC
26 rtc {
27 compatible = "mediatek,mt6323-rtc";
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| D | rtc-mt2712.txt | 1 Device-Tree bindings for MediaTek SoC based RTC
4 - compatible : Should be "mediatek,mt2712-rtc" : for MT2712 SoC
6 - interrupts : Should contain the interrupt for RTC alarm;
10 rtc: rtc@10011000 {
11 compatible = "mediatek,mt2712-rtc";
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| D | rtc-mxc.yaml | 4 $id: http://devicetree.org/schemas/rtc/rtc-mxc.yaml#
10 - $ref: "rtc.yaml#"
18 - fsl,imx1-rtc
19 - fsl,imx21-rtc
30 - description: the SoC RTC clock
50 rtc@10007000 {
51 compatible = "fsl,imx21-rtc";
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| D | rtc-aspeed.txt | 1 ASPEED BMC RTC
6 * aspeed,ast2400-rtc for the ast2400
7 * aspeed,ast2500-rtc for the ast2500
8 * aspeed,ast2600-rtc for the ast2600
17 rtc@1e781000 {
18 compatible = "aspeed,ast2400-rtc";
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| D | pxa-rtc.txt | 1 * PXA RTC
3 PXA specific RTC driver.
6 - compatible : Should be "marvell,pxa-rtc"
10 rtc@40900000 {
11 compatible = "marvell,pxa-rtc";
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| D | rtc-palmas.txt | 1 Palmas RTC controller bindings
5 - "ti,palmas-rtc" for palma series of the RTC controller
6 - interrupts: Interrupt number of RTC submodule on device.
11 TPS80036 supports the backup battery for powering the RTC when main
24 palmas_rtc: rtc {
25 compatible = "ti,palmas-rtc";
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| D | xlnx-rtc.txt | 3 RTC controller for the Xilinx Zynq MPSoC Real Time Clock
7 - compatible: Should be "xlnx,zynqmp-rtc"
10 - interrupts: IRQ lines for the RTC.
18 rtc: rtc@ffa60000 {
19 compatible = "xlnx,zynqmp-rtc";
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| D | renesas,sh-rtc.yaml | 4 $id: http://devicetree.org/schemas/rtc/renesas,sh-rtc.yaml#
16 - const: renesas,r7s72100-rtc # RZ/A1H
17 - const: renesas,sh-rtc
32 # The functional clock source for the RTC controller must be listed
66 rtc: rtc@fcff1000 {
67 compatible = "renesas,r7s72100-rtc", "renesas,sh-rtc";
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| /Documentation/admin-guide/ |
| D | rtc.rst | 2 Real Time Clock (RTC) Drivers for Linux
16 Linux has two largely-compatible userspace RTC API families you may
19 * /dev/rtc ... is the RTC provided by PC compatible systems,
23 supported by a wide variety of RTC chips on all systems.
27 RTCs use the same API to make requests in both RTC frameworks (using
29 same functionality. For example, not every RTC is hooked up to an
35 Old PC/AT-Compatible driver: /dev/rtc
57 The interrupts are reported via /dev/rtc (major 10, minor 135, read only
62 /proc/driver/rtc if the /proc filesystem was enabled. The driver has
63 built in locking so that only one process is allowed to have the /dev/rtc
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| /Documentation/devicetree/bindings/spi/ |
| D | icpdas-lp8841-spi-rtc.txt | 1 * ICP DAS LP-8841 SPI Controller for RTC
3 ICP DAS LP-8841 contains a DS-1302 RTC. RTC is connected to an IO
7 Master output is set on low clock and sensed by the RTC on the rising
8 edge. Master input is set by the RTC on the trailing edge and is sensed
17 - compatible: should be "icpdas,lp8841-spi-rtc"
43 compatible = "icpdas,lp8841-spi-rtc";
46 rtc@0 {
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