Messages in this thread | | | From | Wei Yongjun <> | Subject | [PATCH v2 0/3] allow gpio simulator be used as interrupt controller | Date | Mon, 26 Sep 2022 08:44:25 +0000 |
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From: Wei Yongjun <weiyongjun1@huawei.com>
This series allow gpio simulator be used as interrupt controller, the use case is mockup some device which using GPIO as interrupt controller, such as mcp2515 CAN device. With the dts [1], we can mockup a mcp2515 device, and trigger irq by following commands:
$ echo pull-down > /sys/bus/gpio/devices/gpiochip0/sim_gpio0/pull $ echo pull-up > /sys/bus/gpio/devices/gpiochip0/sim_gpio0/pull
v1 -> v2: - add use case to gpio-sim.rst
--[1]--------------------------------------------------------- /dts-v1/;
#include <dt-bindings/interrupt-controller/irq.h>
/ { clk24m: clk24m { compatible = "fixed-clock"; clock-output-names = "clk24m"; clock-frequency = <24000000>; #clock-cells = <0>; };
gpio-sim { compatible = "gpio-simulator";
bank0: bank0 { gpio-controller; #gpio-cells = <2>; ngpios = <16>;
interrupt-controller; #interrupt-cells = <2>;
line_b-hog { gpio-hog; gpios = <0 1>; input; line-name = "irq-sim"; }; }; };
spi: spi { compatible = "spi-mockup";
#address-cells = <1>; #size-cells = <0>;
can0: can@1 { compatible = "microchip,mcp2515"; reg = <1>; clocks = <&clk24m>; interrupt-parent = <&bank0>; interrupts = <0 IRQ_TYPE_EDGE_BOTH>; };
}; }; ------------------------------><-----------------------------
Wei Yongjun (3): genirq/irq_sim: Allow both one and two cell bindings gpio: sim: make gpio simulator can be used as interrupt controller gpio: sim: document use case for interrupt controller
Documentation/admin-guide/gpio/gpio-sim.rst | 44 +++++++++++++++++++++ drivers/gpio/gpio-sim.c | 2 +- kernel/irq/irq_sim.c | 1 + 3 files changed, 46 insertions(+), 1 deletion(-)
-- 2.34.1
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