JFIF$        dd7 

Viewing File: /usr/src/kernels/5.14.0-570.32.1.el9_6.x86_64/include/media/cec-pin.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * cec-pin.h - low-level CEC pin control
 *
 * Copyright 2017 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 */

#ifndef LINUX_CEC_PIN_H
#define LINUX_CEC_PIN_H

#include <linux/types.h>
#include <media/cec.h>

/**
 * struct cec_pin_ops - low-level CEC pin operations
 * @read:	read the CEC pin. Returns > 0 if high, 0 if low, or an error
 *		if negative.
 * @low:	drive the CEC pin low.
 * @high:	stop driving the CEC pin. The pull-up will drive the pin
 *		high, unless someone else is driving the pin low.
 * @enable_irq:	optional, enable the interrupt to detect pin voltage changes.
 * @disable_irq: optional, disable the interrupt.
 * @free:	optional. Free any allocated resources. Called when the
 *		adapter is deleted.
 * @status:	optional, log status information.
 * @read_hpd:	optional. Read the HPD pin. Returns > 0 if high, 0 if low or
 *		an error if negative.
 * @read_5v:	optional. Read the 5V pin. Returns > 0 if high, 0 if low or
 *		an error if negative.
 * @received:	optional. High-level CEC message callback. Allows the driver
 *		to process CEC messages.
 *
 * These operations (except for the @received op) are used by the
 * cec pin framework to manipulate the CEC pin.
 */
struct cec_pin_ops {
	int  (*read)(struct cec_adapter *adap);
	void (*low)(struct cec_adapter *adap);
	void (*high)(struct cec_adapter *adap);
	bool (*enable_irq)(struct cec_adapter *adap);
	void (*disable_irq)(struct cec_adapter *adap);
	void (*free)(struct cec_adapter *adap);
	void (*status)(struct cec_adapter *adap, struct seq_file *file);
	int  (*read_hpd)(struct cec_adapter *adap);
	int  (*read_5v)(struct cec_adapter *adap);

	/* High-level CEC message callback */
	int (*received)(struct cec_adapter *adap, struct cec_msg *msg);
};

/**
 * cec_pin_changed() - update pin state from interrupt
 *
 * @adap:	pointer to the cec adapter
 * @value:	when true the pin is high, otherwise it is low
 *
 * If changes of the CEC voltage are detected via an interrupt, then
 * cec_pin_changed is called from the interrupt with the new value.
 */
void cec_pin_changed(struct cec_adapter *adap, bool value);

/**
 * cec_pin_allocate_adapter() - allocate a pin-based cec adapter
 *
 * @pin_ops:	low-level pin operations
 * @priv:	will be stored in adap->priv and can be used by the adapter ops.
 *		Use cec_get_drvdata(adap) to get the priv pointer.
 * @name:	the name of the CEC adapter. Note: this name will be copied.
 * @caps:	capabilities of the CEC adapter. This will be ORed with
 *		CEC_CAP_MONITOR_ALL and CEC_CAP_MONITOR_PIN.
 *
 * Allocate a cec adapter using the cec pin framework.
 *
 * Return: a pointer to the cec adapter or an error pointer
 */
struct cec_adapter *cec_pin_allocate_adapter(const struct cec_pin_ops *pin_ops,
					void *priv, const char *name, u32 caps);

#endif
Back to Directory  nL+D550H?Mx ,D"v]qv;6*Zqn)ZP0!1 A "#a$2Qr D8 a Ri[f\mIykIw0cuFcRı?lO7к_f˓[C$殷WF<_W ԣsKcëIzyQy/_LKℂ;C",pFA:/]=H  ~,ls/9ć:[=/#f;)x{ٛEQ )~ =𘙲r*2~ a _V=' kumFD}KYYC)({ *g&f`툪ry`=^cJ.I](*`wq1dđ#̩͑0;H]u搂@:~וKL Nsh}OIR*8:2 !lDJVo(3=M(zȰ+i*NAr6KnSl)!JJӁ* %݉?|D}d5:eP0R;{$X'xF@.ÊB {,WJuQɲRI;9QE琯62fT.DUJ;*cP A\ILNj!J۱+O\͔]ޒS߼Jȧc%ANolՎprULZԛerE2=XDXgVQeӓk yP7U*omQIs,K`)6\G3t?pgjrmۛجwluGtfh9uyP0D;Uڽ"OXlif$)&|ML0Zrm1[HXPlPR0'G=i2N+0e2]]9VTPO׮7h(F*癈'=QVZDF,d߬~TX G[`le69CR(!S2!P <0x<!1AQ "Raq02Br#SCTb ?Ζ"]mH5WR7k.ۛ!}Q~+yԏz|@T20S~Kek *zFf^2X*(@8r?CIuI|֓>^ExLgNUY+{.RѪ τV׸YTD I62'8Y27'\TP.6d&˦@Vqi|8-OΕ]ʔ U=TL8=;6c| !qfF3aů&~$l}'NWUs$Uk^SV:U# 6w++s&r+nڐ{@29 gL u"TÙM=6(^"7r}=6YݾlCuhquympǦ GjhsǜNlɻ}o7#S6aw4!OSrD57%|?x>L |/nD6?/8w#[)L7+6〼T ATg!%5MmZ/c-{1_Je"|^$'O&ޱմTrb$w)R$& N1EtdU3Uȉ1pM"N*(DNyd96.(jQ)X 5cQɎMyW?Q*!R>6=7)Xj5`J]e8%t!+'!1Q5 !1 AQaqё#2"0BRb?Gt^## .llQT $v,,m㵜5ubV =sY+@d{N! dnO<.-B;_wJt6;QJd.Qc%p{ 1,sNDdFHI0ГoXшe黅XۢF:)[FGXƹ/w_cMeD,ʡcc.WDtA$j@:) -# u c1<@ۗ9F)KJ-hpP]_x[qBlbpʖw q"LFGdƶ*s+ډ_Zc"?%t[IP 6J]#=ɺVvvCGsGh1 >)6|ey?Lӣm,4GWUi`]uJVoVDG< SB6ϏQ@ TiUlyOU0kfV~~}SZ@*WUUi##; s/[=!7}"WN]'(L! ~y5g9T̅JkbM' +s:S +B)v@Mj e Cf jE 0Y\QnzG1д~Wo{T9?`Rmyhsy3!HAD]mc1~2LSu7xT;j$`}4->L#vzŏILS ֭T{rjGKC;bpU=-`BsK.SFw4Mq]ZdHS0)tLg