From nobody Tue Feb 10 00:02:30 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F3CDC04A6A for ; Fri, 11 Aug 2023 20:14:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235397AbjHKUO5 (ORCPT ); Fri, 11 Aug 2023 16:14:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51218 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235970AbjHKUOz (ORCPT ); Fri, 11 Aug 2023 16:14:55 -0400 Received: from out-108.mta0.migadu.com (out-108.mta0.migadu.com [IPv6:2001:41d0:1004:224b::6c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C84535A2 for ; Fri, 11 Aug 2023 13:14:51 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jookia.org; s=key1; t=1691784889; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=c760wkxPLczuI7tECzLOiGz+mznMFHiURmBp9IfloLs=; b=SF7GQFQIMbGSIRIbDdfcfm1/Ln1i/WscUwrTn0q7g9Z2FxkvffM46DLW+yosRia5C+01hO nSO9wHJ/nCkY+BuHCKtIPRhAvlQ26+RjFiLI3/9+ZRCUZU2QEYAs9tMPvWJLEALKgYLQcr DXWIy6JF3NZOOctaC6Rs+MK3rVAx64b2TffmFFG3FEaGNLX9rj59OoEnqqcuvwluBe52LX YHzSeZ9+eDwjs+4n980y4xyfurS640oORu3/5Co+ieSypxHceQZLOxxpOShOjqpjQSaoD1 TkEoo/NHBMJqeVdbqUaF3VscGKV8A8XKNogDdt3TwOKPlMVigfFEWFhfkC/d5Q== From: John Watts To: alsa-devel@alsa-project.org Cc: Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Jaroslav Kysela , Takashi Iwai , John Watts , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Maxime Ripard , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [RFC PATCH 4/7] ASoC: sunxi: sun4i-i2s: Use channel-slots device tree property Date: Sat, 12 Aug 2023 06:14:03 +1000 Message-ID: <20230811201406.4096210-5-contact@jookia.org> In-Reply-To: <20230811201406.4096210-1-contact@jookia.org> References: <20230811201406.4096210-1-contact@jookia.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" On R329 I2S variants with multiple pins it's useful to read from multiple devices within a single TDM slot. Allow changing the assignment of slots through a device tree property. As an example: &i2s2 { channel-dins =3D /bits/ 8 <0 0 1 1 2 2>; channel-slots =3D /bits/ 8 <0 1 0 1 0 1>; }; In addition to configuring the first 6 channels to use different DIN pins for three separate ADCs, the addition of channel-slots allows all three ADCs to be sampled within the first two TDM slots. Signed-off-by: John Watts --- sound/soc/sunxi/sun4i-i2s.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c index 627bf319e1cc..019a4856c90b 100644 --- a/sound/soc/sunxi/sun4i-i2s.c +++ b/sound/soc/sunxi/sun4i-i2s.c @@ -269,12 +269,27 @@ static int sun4i_i2s_read_channel_dins(struct device = *dev, struct sun4i_i2s *i2s =20 static int sun4i_i2s_read_channel_slots(struct device *dev, struct sun4i_i= 2s *i2s) { + struct device_node *np =3D dev->of_node; int max_channels =3D ARRAY_SIZE(i2s->channel_dins); + int ret; =20 /* Use a 1:1 mapping by default */ for (int i =3D 0; i < max_channels; ++i) i2s->channel_slots[i] =3D i; =20 + if (!np) + return 0; + + ret =3D of_property_read_variable_u8_array(np, "channel-slots", + i2s->channel_slots, + 1, max_channels); + + if (ret =3D=3D -EINVAL) + return 0; + + if (ret < 0) + return ret; + return 0; } =20 --=20 2.41.0