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/linux-6.14.4/Documentation/devicetree/bindings/gpio/
Dsprd,gpio-eic.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
5 $id: http://devicetree.org/schemas/gpio/sprd,gpio-eic.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: Unisoc EIC controller
11 - Orson Zhai <[email protected]>
12 - Baolin Wang <[email protected]>
13 - Chunyan Zhang <[email protected]>
16 The EIC is the abbreviation of external interrupt controller, which can
17 be used only in input mode. The Spreadtrum platform has 2 EIC controllers,
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/linux-6.14.4/drivers/gpio/
Dgpio-eic-sprd.c1 // SPDX-License-Identifier: GPL-2.0
17 /* EIC registers definition */
54 * The digital-chip EIC controller can support maximum 3 banks, and each bank
60 #define SPRD_EIC_BIT(x) ((x) & (SPRD_EIC_PER_BANK_NR - 1))
64 * The Spreadtrum EIC (external interrupt controller) can be used only in
67 * The Spreadtrum digital-chip EIC controller contains 4 sub-modules:
68 * debounce EIC, latch EIC, async EIC and sync EIC,
70 * The debounce EIC is used to capture the input signals' stable status
71 * (millisecond resolution) and a single-trigger mechanism is introduced
72 * into this sub-module to enhance the input event detection reliability.
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DMakefile1 # SPDX-License-Identifier: GPL-2.0
4 ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG
6 obj-$(CONFIG_GPIOLIB) += gpiolib.o
7 obj-$(CONFIG_GPIOLIB) += gpiolib-devres.o
8 obj-$(CONFIG_GPIOLIB) += gpiolib-legacy.o
9 obj-$(CONFIG_OF_GPIO) += gpiolib-of.o
10 obj-$(CONFIG_GPIO_CDEV) += gpiolib-cdev.o
11 obj-$(CONFIG_GPIO_SYSFS) += gpiolib-sysfs.o
12 obj-$(CONFIG_GPIO_ACPI) += gpiolib-acpi.o
13 obj-$(CONFIG_GPIOLIB) += gpiolib-swnode.o
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DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
47 this symbol, but new drivers should use the generic gpio-regmap
57 non-sleeping contexts. They can make bitbanged serial protocols
126 Enables support for the idio-16 library functions. The idio-16 library
128 ACCES IDIO-16 family such as the 104-IDIO-16 and the PCI-IDIO-16.
130 If built as a module its name will be gpio-idio-16.
136 tristate "GPIO driver for 74xx-ICs with MMIO access"
140 Say yes here to support GPIO functionality for 74xx-compatible ICs
155 If driver is built as a module it will be called gpio-altera.
256 tristate "Spreadtrum EIC support"
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/linux-6.14.4/arch/arm64/boot/dts/sprd/
Dwhale2.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
8 #include <dt-bindings/clock/sprd,sc9860-clk.h>
11 interrupt-parent = <&gic>;
12 #address-cells = <2>;
13 #size-cells = <2>;
16 compatible = "simple-bus";
17 #address-cells = <2>;
18 #size-cells = <2>;
66 ap-apb@70000000 {
67 compatible = "simple-bus";
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