From patchwork Fri Jun 21 11:22:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: claudiu beznea X-Patchwork-Id: 806426 Received: from mail-ej1-f48.google.com (mail-ej1-f48.google.com [209.85.218.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3285A176223 for ; Fri, 21 Jun 2024 11:23:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718969005; cv=none; b=aLeRVvORSY8tcbeOcOThv2HRnQKInMFucr/VZSpEK0taTab8w6pG4rxwmMJzmUM5gFxxfraix0/83l4canrTM3wK4TB2tbWEdlbyalnh12Vu4ppWPtQYtM9I4Qp8XnnzgZjtKeOqFwiiAF2matGczZUMhOSG0W567vDAsvPxJi4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718969005; c=relaxed/simple; bh=S1hm/Q+NuAcT9nxD/pVjadLD+I32CWUrwiArUqlGHZ4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=G8iYhYA0AZbK+nyso/9WI8oQVqjVwt49JOT/5//y9lrb5Fpz5Y88ldCiDMkoAyBR6uhclv1DVr7erOyN8PGzmfbKdNAyVYMsN56EQ0cB00XZKrZSlFzA57cMq7vfKXLvEX/tBsntilZneESSpJ0ZWLO5VYGQ1XaTQy1ohciC0zY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tuxon.dev; spf=pass smtp.mailfrom=tuxon.dev; dkim=pass (2048-bit key) header.d=tuxon.dev header.i=@tuxon.dev header.b=GeZynVUt; arc=none smtp.client-ip=209.85.218.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tuxon.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=tuxon.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=tuxon.dev header.i=@tuxon.dev header.b="GeZynVUt" Received: by mail-ej1-f48.google.com with SMTP id a640c23a62f3a-a6ef46d25efso215064266b.0 for ; Fri, 21 Jun 2024 04:23:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1718969002; x=1719573802; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=2Q2S7HvfURtpVg3mGnjpDhomnr+bQTG6duN65cLSQuA=; b=GeZynVUtyNJ7ICUa+oeTYkvg05nCPYCHKrpxNRu4oAGR1PUDDW8QksNp7RoW9xMo47 EVz3gZiymrJhwTrnfKlyVGH2MZpCmoJ0RI45l0Kotpu88fhvliOoKIRMCEOv91KxcF5+ BI4pSgZ5Ajtn50Aw79Sg914/BstzazII0MW03GrTQBlX9tKzVDSK7v3MASrWpl8f4T2M rbCTY2T0gJ0zNPi+KBTWvL0stojZ+1T6SRt9yTX1rRuY8GnI/d+Wt/8d79enhuz25WM4 FbljAahvZX26/5fSR1nDXCwi+KXZmZMANLYoPlz2PEqwV7+KIXshqcXjph6CVjXIZh8z ADMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718969002; x=1719573802; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=2Q2S7HvfURtpVg3mGnjpDhomnr+bQTG6duN65cLSQuA=; b=vlux1pBxGCrWlGT4TPcvYOD2Fr9gmeX/hkXGeGzTn1Sbk4SlaGb31A6s/6tmYKE3EJ cXLmYvydl/bGjhlvySdbml5Jj95VxymDr6+P817l1BTV37XYxt4P1SJqKvmwQAefzzyw RQNqvWGQ2pUVVfQZYZPVnCUk6AUV7k/XKV3gWKGJqtLx0jfoQr7BjsWCy7Wo4zdx+hM6 OweJqroL44dWpZP5i80elo7HtBFPgQHuIN9mvLxL7GYmuiUunSOoqMshLXYZQNTEryQF 6ekbZfF5XtGOwGMpMg55sinEYLRYgzTJh0YZczeVAuy7Exl/OJf3acaI3Z1hN4CDyPTR JHdw== X-Forwarded-Encrypted: i=1; AJvYcCU584MHZs//uRRJVH14OtWMTUHGiQO6zbhewLYH367mW3emEr1QLo5v9fuOR60LbpazH9vcKs7mjemcSCK9Ug4Fub6/x3D9Iqhm X-Gm-Message-State: AOJu0YzLF35wNxU4qkkY5ifWU7hXCSDUjMIbEWkvKjf2NbwyoLOEc9T8 utogk0r1f/RfN1bYWUSjAyHkGzfwige+wb+vaC98RRYK8U9lh10MR3Ot7w4lzoU= X-Google-Smtp-Source: AGHT+IFBywlMwo6ddeYYu3/kNuX5vO5gDzF03oKjx3N6oQ3I7NwLK+CukGLkpEtNcx6M4DcPC6fEDA== X-Received: by 2002:a17:906:c385:b0:a6f:5fc2:fe8b with SMTP id a640c23a62f3a-a6fab62f61dmr408251266b.32.1718969002596; Fri, 21 Jun 2024 04:23:22 -0700 (PDT) Received: from claudiu-X670E-Pro-RS.. ([82.78.167.70]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a6fd0838345sm64498466b.99.2024.06.21.04.23.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Jun 2024 04:23:22 -0700 (PDT) From: Claudiu X-Google-Original-From: Claudiu To: chris.brandt@renesas.com, andi.shyti@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, geert+renesas@glider.be, magnus.damm@gmail.com, mturquette@baylibre.com, sboyd@kernel.org, p.zabel@pengutronix.de, wsa+renesas@sang-engineering.com Cc: linux-renesas-soc@vger.kernel.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, claudiu.beznea@tuxon.dev, Claudiu Beznea Subject: [PATCH 04/12] i2c: riic: Use pm_runtime_resume_and_get() Date: Fri, 21 Jun 2024 14:22:55 +0300 Message-Id: <20240621112303.1607621-5-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240621112303.1607621-1-claudiu.beznea.uj@bp.renesas.com> References: <20240621112303.1607621-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Claudiu Beznea pm_runtime_get_sync() may return with error. In case it returns with error dev->power.usage_count needs to be decremented. pm_runtime_resume_and_get() takes care of this. Thus use it. Signed-off-by: Claudiu Beznea --- drivers/i2c/busses/i2c-riic.c | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) diff --git a/drivers/i2c/busses/i2c-riic.c b/drivers/i2c/busses/i2c-riic.c index 83e4d5e14ab6..6b739483ef37 100644 --- a/drivers/i2c/busses/i2c-riic.c +++ b/drivers/i2c/busses/i2c-riic.c @@ -113,6 +113,8 @@ struct riic_irq_desc { char *name; }; +static const char * const riic_rpm_err_msg = "Failed to runtime resume"; + static inline void riic_writeb(struct riic_dev *riic, u8 val, u8 offset) { writeb(val, riic->base + riic->info->regs[offset]); @@ -133,10 +135,14 @@ static int riic_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) struct riic_dev *riic = i2c_get_adapdata(adap); struct device *dev = adap->dev.parent; unsigned long time_left; - int i; + int i, ret; u8 start_bit; - pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); + if (ret) { + dev_err(dev, riic_rpm_err_msg); + return ret; + } if (riic_readb(riic, RIIC_ICCR2) & ICCR2_BBSY) { riic->err = -EBUSY; @@ -301,6 +307,7 @@ static const struct i2c_algorithm riic_algo = { static int riic_init_hw(struct riic_dev *riic, struct i2c_timings *t) { + int ret; unsigned long rate; int total_ticks, cks, brl, brh; struct device *dev = riic->adapter.dev.parent; @@ -379,7 +386,11 @@ static int riic_init_hw(struct riic_dev *riic, struct i2c_timings *t) t->scl_fall_ns / (1000000000 / rate), t->scl_rise_ns / (1000000000 / rate), cks, brl, brh); - pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); + if (ret) { + dev_err(dev, riic_rpm_err_msg); + return ret; + } /* Changing the order of accessing IICRST and ICE may break things! */ riic_writeb(riic, ICCR1_IICRST | ICCR1_SOWP, RIIC_ICCR1); @@ -498,8 +509,14 @@ static void riic_i2c_remove(struct platform_device *pdev) { struct riic_dev *riic = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; + int ret; + + ret = pm_runtime_resume_and_get(dev); + if (ret) { + dev_err(dev, riic_rpm_err_msg); + return; + } - pm_runtime_get_sync(dev); riic_writeb(riic, 0, RIIC_ICIER); pm_runtime_put(dev); i2c_del_adapter(&riic->adapter);