From patchwork Thu Aug 28 06:54:58 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 4800651 Return-Path: X-Original-To: patchwork-ltsi-dev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 9C62C9F375 for ; Thu, 28 Aug 2014 08:48:11 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BFBE620109 for ; Thu, 28 Aug 2014 08:48:10 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C764320034 for ; Thu, 28 Aug 2014 08:48:09 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 51F9B169B; Thu, 28 Aug 2014 07:36:33 +0000 (UTC) X-Original-To: ltsi-dev@lists.linuxfoundation.org Delivered-To: ltsi-dev@mail.linuxfoundation.org Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id BDDB01606 for ; Thu, 28 Aug 2014 07:36:04 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from kirsty.vergenet.net (kirsty.vergenet.net [202.4.237.240]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 0D926201B4 for ; Thu, 28 Aug 2014 07:36:04 +0000 (UTC) Received: from ayumi.isobedori.kobe.vergenet.net (p4222-ipbfp1605kobeminato.hyogo.ocn.ne.jp [114.154.95.222]) by kirsty.vergenet.net (Postfix) with ESMTP id DD4E72671F2; Thu, 28 Aug 2014 17:07:51 +1000 (EST) Received: by ayumi.isobedori.kobe.vergenet.net (Postfix, from userid 7100) id 5ABC6EDE8E2; Thu, 28 Aug 2014 16:07:50 +0900 (JST) From: Simon Horman To: ltsi-dev@lists.linuxfoundation.org Date: Thu, 28 Aug 2014 15:54:58 +0900 Message-Id: <1409209620-24487-173-git-send-email-horms+renesas@verge.net.au> X-Mailer: git-send-email 2.0.1 In-Reply-To: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> References: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org Cc: Magnus Damm Subject: [LTSI-dev] [PATCH LTSI-3.14 172/894] i2c: rcar: refactor irq state machine X-BeenThere: ltsi-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "A list to discuss patches, development, and other things related to the LTSI project" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: ltsi-dev-bounces@lists.linuxfoundation.org Errors-To: ltsi-dev-bounces@lists.linuxfoundation.org X-Virus-Scanned: ClamAV using ClamSMTP From: Wolfram Sang Remove the seperate functions and use designated constants. As readable but less overhead. Actually, this is even more readable since the old function used a mix of "=" and "|=". Signed-off-by: Wolfram Sang Acked-by: Kuninori Morimoto Acked-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang (cherry picked from commit f2382249b27d1589a1ae495a1df84d890982a3e1) Signed-off-by: Simon Horman --- drivers/i2c/busses/i2c-rcar.c | 39 +++++++-------------------------------- 1 file changed, 7 insertions(+), 32 deletions(-) diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index eadaca0..f2cbb8a 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -83,12 +83,9 @@ #define RCAR_BUS_PHASE_DATA (MDBS | MIE) #define RCAR_BUS_PHASE_STOP (MDBS | MIE | FSB) -enum { - RCAR_IRQ_CLOSE, - RCAR_IRQ_OPEN_FOR_SEND, - RCAR_IRQ_OPEN_FOR_RECV, - RCAR_IRQ_OPEN_FOR_STOP, -}; +#define RCAR_IRQ_SEND (MNRE | MALE | MSTE | MATE | MDEE) +#define RCAR_IRQ_RECV (MNRE | MALE | MSTE | MATE | MDRE) +#define RCAR_IRQ_STOP (MSTE) /* * flags @@ -158,28 +155,6 @@ static void rcar_i2c_init(struct rcar_i2c_priv *priv) rcar_i2c_write(priv, ICMAR, 0); } -static void rcar_i2c_irq_mask(struct rcar_i2c_priv *priv, int open) -{ - u32 val = MNRE | MALE | MSTE | MATE; /* default */ - - switch (open) { - case RCAR_IRQ_OPEN_FOR_SEND: - val |= MDEE; /* default + send */ - break; - case RCAR_IRQ_OPEN_FOR_RECV: - val |= MDRE; /* default + read */ - break; - case RCAR_IRQ_OPEN_FOR_STOP: - val = MSTE; /* stop irq only */ - break; - case RCAR_IRQ_CLOSE: - default: - val = 0; /* all close */ - break; - } - rcar_i2c_write(priv, ICMIER, val); -} - static void rcar_i2c_set_addr(struct rcar_i2c_priv *priv, u32 recv) { rcar_i2c_write(priv, ICMAR, (priv->msg->addr << 1) | recv); @@ -312,7 +287,7 @@ static int rcar_i2c_recv(struct rcar_i2c_priv *priv) rcar_i2c_set_addr(priv, 1); rcar_i2c_status_clear(priv); rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_START); - rcar_i2c_irq_mask(priv, RCAR_IRQ_OPEN_FOR_RECV); + rcar_i2c_write(priv, ICMIER, RCAR_IRQ_RECV); return 0; } @@ -331,7 +306,7 @@ static int rcar_i2c_send(struct rcar_i2c_priv *priv) rcar_i2c_set_addr(priv, 0); rcar_i2c_status_clear(priv); rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_START); - rcar_i2c_irq_mask(priv, RCAR_IRQ_OPEN_FOR_SEND); + rcar_i2c_write(priv, ICMIER, RCAR_IRQ_SEND); return 0; } @@ -486,7 +461,7 @@ static irqreturn_t rcar_i2c_irq(int irq, void *ptr) /* go to stop phase */ rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_STOP); - rcar_i2c_irq_mask(priv, RCAR_IRQ_OPEN_FOR_STOP); + rcar_i2c_write(priv, ICMIER, RCAR_IRQ_STOP); rcar_i2c_flags_set(priv, ID_NACK); goto out; } @@ -501,7 +476,7 @@ static irqreturn_t rcar_i2c_irq(int irq, void *ptr) out: if (rcar_i2c_flags_has(priv, ID_DONE)) { - rcar_i2c_irq_mask(priv, RCAR_IRQ_CLOSE); + rcar_i2c_write(priv, ICMIER, 0); rcar_i2c_status_clear(priv); wake_up(&priv->wait); }