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The new interfaces are meant to gradually replace the existing Gpio_session interface. - Each session refers to a single pin. - The session types distiguish the direction of the signal as input or output. - Pin coordinates can be selected via session labels. - GPIO interrupts are covered by the regular IRQ session interface. The interfaces are accompanied by framework utilities and interfaces: - os/pin_driver.h - pin_control_session/component.h - pin_state_session/component.h These headers relieve GPIO drivers from implementing boilerplate code by providing device-agnostic portions. The A64 pio driver serves as reference for using those utilities. https://github.com/nfeske/genode-allwinner/tree/master/src/drivers/pin/a64 Fixes #4315
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
/*
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* \brief Connection to pin-control service
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* \author Norman Feske
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* \date 2021-04-20
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*/
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/*
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* Copyright (C) 2021 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__PIN_CONTROL_SESSION__CONNECTION_H_
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#define _INCLUDE__PIN_CONTROL_SESSION__CONNECTION_H_
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#include <pin_control_session/pin_control_session.h>
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#include <base/rpc_client.h>
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#include <base/connection.h>
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namespace Pin_control { struct Connection; }
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struct Pin_control::Connection : private Genode::Connection<Session>,
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private Rpc_client<Session>
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{
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enum { RAM_QUOTA = 8*1024UL };
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Connection(Env &env, char const *label = "")
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:
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Genode::Connection<Session>(env,
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session(env.parent(),
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"ram_quota=%u, cap_quota=%u, label=\"%s\"",
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RAM_QUOTA, CAP_QUOTA, label)),
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Rpc_client<Session>(cap())
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{ }
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void state(bool enabled) override { call<Rpc_state>(enabled); }
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};
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#endif /* _INCLUDE__PIN_CONTROL_SESSION__CONNECTION_H_ */
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