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/openbmc/linux/Documentation/devicetree/bindings/gpio/
H A 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 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: Unisoc EIC controller
11 - Orson Zhai <orsonzhai@gmail.com>
12 - Baolin Wang <baolin.wang7@gmail.com>
13 - Chunyan Zhang <zhang.lyra@gmail.com>
16 The EIC is the abbreviation of external interrupt controller, which can
17 be used only in input mode. The Spreadtrum platform has 2 EIC controllers,
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/openbmc/linux/drivers/gpio/
H A Dgpio-eic-sprd.c1 // SPDX-License-Identifier: GPL-2.0
16 /* EIC registers definition */
53 * The digital-chip EIC controller can support maximum 3 banks, and each bank
59 #define SPRD_EIC_BIT(x) ((x) & (SPRD_EIC_PER_BANK_NR - 1))
63 * The Spreadtrum EIC (external interrupt controller) can be used only in
66 * The Spreadtrum digital-chip EIC controller contains 4 sub-modules:
67 * debounce EIC, latch EIC, async EIC and sync EIC,
69 * The debounce EIC is used to capture the input signals' stable status
70 * (millisecond resolution) and a single-trigger mechanism is introduced
71 * into this sub-module to enhance the input event detection reliability.
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H A DMakefile1 # SPDX-License-Identifier: GPL-2.0
4 ccflags-$(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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H A 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
118 Enables support for the idio-16 library functions. The idio-16 library
120 ACCES IDIO-16 family such as the 104-IDIO-16 and the PCI-IDIO-16.
122 If built as a module its name will be gpio-idio-16.
128 tristate "GPIO driver for 74xx-ICs with MMIO access"
132 Say yes here to support GPIO functionality for 74xx-compatible ICs
149 If driver is built as a module it will be called gpio-altera.
250 tristate "Spreadtrum EIC support"
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/openbmc/linux/arch/arm64/boot/dts/sprd/
H A Dwhale2.dtsi6 * SPDX-License-Identifier: (GPL-2.0+ OR MIT)
9 #include <dt-bindings/clock/sprd,sc9860-clk.h>
12 interrupt-parent = <&gic>;
13 #address-cells = <2>;
14 #size-cells = <2>;
17 compatible = "simple-bus";
18 #address-cells = <2>;
19 #size-cells = <2>;
67 ap-apb {
68 compatible = "simple-bus";
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