From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F272274C08 for ; Tue, 14 Jan 2025 14:23:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736864599; cv=none; b=EHaAdW9mlbqY5dFjpUzOfcOcDlF3uYWfmbjBe0AeiSipI3HGUpbIi4YftS0L2mttLpy2JvEJyqhgD1ArTUE1S4+gU95uQ3Y3nzsoyIKxO9ygz2laMQ/npd7NM6aE16lHCahX812xWpI1qRdpKHYPKWmwbdiQC7EaRYGPxrhKhE4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736864599; c=relaxed/simple; bh=g6JUCpa+aMW4kOsRqofdRDNZpbBNlhggFkOh0zQdffI=; h=Message-ID:Date:MIME-Version:Subject:To:References:Cc:From: In-Reply-To:Content-Type; b=gJQnPl22080X/bHs1nAKFUM6W5ahPVeKE18I/FR+haXyOjpfAMd22eTwJOl3+if13vXk7nHOoCxc/y7SMWAGEcIQRrOlFKvPtOZM1JdjwtdsHKXJa4piTv7mTQKcazMAgia83aCNmECvHLEA8CR5dgDWWdKauqhWiJU7Vy09nM8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=aE8j2Gfy; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="aE8j2Gfy" Received: from [192.168.88.20] (91-158-153-178.elisa-laajakaista.fi [91.158.153.178]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 73B0A842; Tue, 14 Jan 2025 15:22:17 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1736864537; bh=g6JUCpa+aMW4kOsRqofdRDNZpbBNlhggFkOh0zQdffI=; h=Date:Subject:To:References:Cc:From:In-Reply-To:From; b=aE8j2GfyWVl/XYN+Jd4wuSFutUIM0CJX+9YTAt/d9ccAQINeZOj2ECJOSDqu2pe8e cIjt1GHzShKIoX837pSlAvOxS8koedAOH7Hm7H9xgJroi57H/TAq5Uoikl+8VlcTS4 qn3ZhN+lvGv0S/tBVtZI7BR7JBHDvWyigBFzQXdU= Message-ID: <9b54bb98-0d96-4c48-9500-4e754889d795@ideasonboard.com> Date: Tue, 14 Jan 2025 16:23:11 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] drm/omap/dss: Use syscon_regmap_lookup_by_phandle_args To: Krzysztof Kozlowski References: <20250112134656.46069-1-krzysztof.kozlowski@linaro.org> Content-Language: en-US Cc: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org From: Tomi Valkeinen Autocrypt: addr=tomi.valkeinen@ideasonboard.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi, On 12/01/2025 15:46, Krzysztof Kozlowski wrote: > Use syscon_regmap_lookup_by_phandle_args() which is a wrapper over > syscon_regmap_lookup_by_phandle() combined with getting the syscon > argument. Except simpler code this annotates within one line that given > phandle has arguments, so grepping for code would be easier. > > There is also no real benefit in printing errors on missing syscon > argument, because this is done just too late: runtime check on > static/build-time data. Dtschema and Devicetree bindings offer the > static/build-time check for this already. > > Signed-off-by: Krzysztof Kozlowski > --- > drivers/gpu/drm/omapdrm/dss/dss.c | 14 ++++---------- > 1 file changed, 4 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpu/drm/omapdrm/dss/dss.c b/drivers/gpu/drm/omapdrm/dss/dss.c > index 7b2df3185de4..692df747e2ae 100644 > --- a/drivers/gpu/drm/omapdrm/dss/dss.c > +++ b/drivers/gpu/drm/omapdrm/dss/dss.c > @@ -1236,21 +1236,15 @@ static int dss_video_pll_probe(struct dss_device *dss) > if (!np) > return 0; > > - if (of_property_read_bool(np, "syscon-pll-ctrl")) { > - dss->syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np, > - "syscon-pll-ctrl"); > + if (of_property_present(np, "syscon-pll-ctrl")) { > + dss->syscon_pll_ctrl = > + syscon_regmap_lookup_by_phandle_args(np, "syscon-pll-ctrl", > + 1, &dss->syscon_pll_ctrl_offset); > if (IS_ERR(dss->syscon_pll_ctrl)) { > dev_err(&pdev->dev, > "failed to get syscon-pll-ctrl regmap\n"); > return PTR_ERR(dss->syscon_pll_ctrl); > } > - > - if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1, > - &dss->syscon_pll_ctrl_offset)) { > - dev_err(&pdev->dev, > - "failed to get syscon-pll-ctrl offset\n"); > - return -EINVAL; > - } > } > > pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video"); Looks reasonable to me. Tested on dra76 evm. I can push this to drm-misc-next later if I see no other comments. Reviewed-by: Tomi Valkeinen Tomi