From patchwork Thu Jul 11 11:52:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu X-Patchwork-Id: 812699 Received: from mail-wr1-f41.google.com (mail-wr1-f41.google.com [209.85.221.41]) (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 32171158842 for ; Thu, 11 Jul 2024 11:52:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.41 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720698750; cv=none; b=OT/+XhN7TEyydY/JxOuwn1dRvMWgmXD0eejeUSbnkzVHAHFHELQ9hjAbXead9f0TAuEnpJHaeIXYz1vlDx1fa8kRrfaY8V25X8MZLc+2Y9jPkt16yOLgwAFpohbE4J+XsSLKCnu646W/1PPKzOomLOZhr4o67e3UFhW6Rg5O/s8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720698750; c=relaxed/simple; bh=LNIbD0mShRhijjyrncFa/Sfct8EIIrIFNTLpGEmeFOg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=bc592r/vXubSx1TDBdaeNqQNM1cUPyxS4mvoHz8ialzFT4tW7r49XdCvE7AYttdQuujW0S9HZYMkVKn2lmk6PSzcofToloZkc5U0JITEA8EsH+vfF9r7C+gd85+952KjorSaKJODGTuVKWR3PmfiKMl4IFTNNM3R05VAgM1b+5I= 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=gErmeWW8; arc=none smtp.client-ip=209.85.221.41 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="gErmeWW8" Received: by mail-wr1-f41.google.com with SMTP id ffacd0b85a97d-36794da7c96so391644f8f.0 for ; Thu, 11 Jul 2024 04:52:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1720698747; x=1721303547; 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=3C+MvDdWpXknhzh2+tcBHGd/tUZH0vNFhsggMze/hfU=; b=gErmeWW8eVDwAiXp6aiu2XEy1MSLe9CBSZ9+GDpA7W2DSjeuklvmMM83XouSD4s2wB D26jtlvXgiJMsgKaMdjNKVb4ixXvTt6SvRI+dHmce0UaXUW4oXFjEIrp/fbX02DX1TB/ ntFxJNtICST8HniZPGeQ2TcW/QcuJjt6jkV3TIPQrS+wlbT0esvCSvQERbgt374C8YSl RO8FKaKxp6dWMqvAovMOo0uUg212NlAAQjijpbX4qmF7heynE/c4s80hB5w0R1stqqig J6qLpBA7e4QayXljvU5iMABGr1Wch9CVR10QTOsfEjKSP7lCiuL9W0rwF6o87I/yZ1Vn kOyg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720698747; x=1721303547; 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=3C+MvDdWpXknhzh2+tcBHGd/tUZH0vNFhsggMze/hfU=; b=KtFx2tEkhh6yYlzQJJIcMPK+qMtBLkzYQIYxriSRBm11M2is/5DRfHiqEEQ/5Yg9KE iQNKk3KCKWdI59TbXwMx7BPBX8sU5nL2txst+a9JhnyhHr8X/AxdSQ4XsX2D28H6wAoY 4XGWUw7h4DbC9IMIPmsjSmxMynKp8WMxanWKLCFHbT970OBUl99XbZURDnfDl9JfsU/g b2ZU0SqpR7D48Hi5/43ArNKVdOA42TpQ25VA1bZkdGm4AGbyP3v9q3vXv2jIPDWrY0M5 KYRXPPtsjeq1cyoFkL7izxyWaF2TCqyK7kPJ7SSaZg+JT3I6nseXDRrfsq6dtgVdYQT5 J/fA== X-Forwarded-Encrypted: i=1; AJvYcCVZ837Kq8dgxmQB46nfh/FnVKC7Tx4gxyU3BdYyxcUejCerBJfxxkXQjfLegVQM7RawatCW0up4Hdoma4Sg3PWxdywj6bhl1csH X-Gm-Message-State: AOJu0YxLeyzkYE0fUOo50bwWjLrezrAFvgQ59WSh/5POjX3eqdJnamO8 bwDVp0xQg9zg9lwBSujxtMjzWi8AJYaEV7ajVmNBwiOPMhvUc4mkvLo6fD3f2Qmw78z/9fryqkT q X-Google-Smtp-Source: AGHT+IH2hTGLcXrN3uhdyk22JKMZRxxLuK+TCBJEjjs2NDQ/EQ3L1L+BY0g6p7ApgwsOTecou6oDHA== X-Received: by 2002:a5d:47ac:0:b0:367:4384:a572 with SMTP id ffacd0b85a97d-367cea4687amr6873928f8f.9.1720698746729; Thu, 11 Jul 2024 04:52:26 -0700 (PDT) Received: from claudiu-X670E-Pro-RS.. ([82.78.167.171]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-367cde891cesm7615728f8f.62.2024.07.11.04.52.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Jul 2024 04:52:26 -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, 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, claudiu.beznea@tuxon.dev, Claudiu Beznea Subject: [PATCH v3 04/11] i2c: riic: Enable runtime PM autosuspend support Date: Thu, 11 Jul 2024 14:52:00 +0300 Message-Id: <20240711115207.2843133-5-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240711115207.2843133-1-claudiu.beznea.uj@bp.renesas.com> References: <20240711115207.2843133-1-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 Enable runtime PM autosuspend support for the RIIC driver. With this, in case there are consecutive xfer requests the device wouldn't be runtime enabled/disabled after each consecutive xfer but after the the delay configured by user. With this, we can avoid touching hardware registers involved in runtime PM suspend/resume saving in this way some cycles. The default chosen autosuspend delay is zero to keep the previous driver behavior. Signed-off-by: Claudiu Beznea Reviewed-by: Wolfram Sang --- Changes in v3: - none Changes in v2: - none drivers/i2c/busses/i2c-riic.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-riic.c b/drivers/i2c/busses/i2c-riic.c index 068f90ecf27e..46765715d39f 100644 --- a/drivers/i2c/busses/i2c-riic.c +++ b/drivers/i2c/busses/i2c-riic.c @@ -171,7 +171,8 @@ static int riic_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) } out: - pm_runtime_put(dev); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); return riic->err ?: num; } @@ -399,7 +400,8 @@ static int riic_init_hw(struct riic_dev *riic, struct i2c_timings *t) riic_clear_set_bit(riic, ICCR1_IICRST, 0, RIIC_ICCR1); - pm_runtime_put(dev); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); return 0; } @@ -479,6 +481,8 @@ static int riic_i2c_probe(struct platform_device *pdev) i2c_parse_fw_timings(dev, &i2c_t, true); + pm_runtime_set_autosuspend_delay(dev, 0); + pm_runtime_use_autosuspend(dev); pm_runtime_enable(dev); ret = riic_init_hw(riic, &i2c_t); @@ -496,6 +500,7 @@ static int riic_i2c_probe(struct platform_device *pdev) out: pm_runtime_disable(dev); + pm_runtime_dont_use_autosuspend(dev); return ret; } @@ -512,6 +517,7 @@ static void riic_i2c_remove(struct platform_device *pdev) } i2c_del_adapter(&riic->adapter); pm_runtime_disable(dev); + pm_runtime_dont_use_autosuspend(dev); } static const struct riic_of_data riic_rz_a_info = {