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/linux/Documentation/devicetree/bindings/gpio/
H A Dlsi,zevio-gpio.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/gpio/lsi,zevio-gpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Zevio GPIO controller
10 - Pratik Farkase <pratikfarkase94@gmail.com>
15 - const: lsi,zevio-gpio
23 "#gpio-cells":
26 gpio-controller: true
29 - compatible
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/linux/arch/arm/boot/dts/nspire/
H A Dnspire-classic.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
11 remote-endpoint = <&panel_in>;
17 /* compatible = "lsi,zevio-timer"; */
23 reg-shift = <2>;
24 reg-io-width = <4>;
26 no-loopback-test;
30 /* compatible = "lsi,zevio-timer"; */
35 compatible = "lsi,zevio-timer";
40 active-low;
45 compatible = "lsi,nspire-classic-clock";
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H A Dnspire.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
7 #address-cells = <1>;
8 #size-cells = <1>;
9 interrupt-parent = <&intc>;
12 #address-cells = <1>;
13 #size-cells = <0>;
16 compatible = "arm,arm926ej-s";
27 compatible = "mmio-sram";
29 #address-cells = <1>;
30 #size-cells = <1>;
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/linux/drivers/gpio/
H A Dgpio-zevio.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * GPIO controller in LSI ZEVIO SoCs.
5 * Author: Fabian Vogt <fabian@ritter-vogt.de>
18 #include <linux/gpio/driver.h>
22 * This chip has four gpio sections, each controls 8 GPIOs.
23 * Bit 0 in section 0 is GPIO 0, bit 2 in section 1 is GPIO 10.
26 …tp://hackspire.unsads.com/wiki/index.php/Memory-mapped_I/O_ports#90000000_-_General_Purpose_I.2FO_…
28 * 0x00-0x3F: Section 0
29 * +0x00: Masked interrupt status (read-only)
32 * +0x0C: W: Unmask interrupt (write-only)
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H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
3 # GPIO infrastructure and drivers
10 bool "GPIO Support"
12 This enables GPIO support through the generic GPIO library.
14 one or more of the GPIO drivers below.
50 this symbol, but new drivers should use the generic gpio-regmap
54 bool "Debug GPIO calls"
57 Say Y here to add some extra checks and diagnostics to GPIO calls.
60 non-sleeping contexts. They can make bitbanged serial protocols
65 bool "/sys/class/gpio/... (sysfs interface)" if EXPERT
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