From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 F2FB14AA581; Thu, 3 Sep 2026 13:00:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788440452; cv=none; b=u3PbT57PiePTylQzmbgZjEQHhq7In7Mxko9Xg8Al1CXU1gWkg327lgiYsXJ2ikaD7gPxHuPLir5kntlAINB7SSJAL2mGwKk+cm9/O3HOWxgKep+HF1Y50DIak30Ft8B603JKg6s7zi/vga96CvVYZVW42DH+7GrA+ioGzTTtGqc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788440452; c=relaxed/simple; bh=2jCCbt+FQXCbWg0CbWpY7BWoaZps7tU2RqU8vFlYFJQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=R4p5LtOxPF7O+FeY4mfDxoVAok/rXkEsnH7u6OWokgGul7vlIBoL77BSx+VbEXyfR287crK5BcmpsdUFYklcuxMfSaHveine4KKOlVeBs1Sr/3HioOePcHrWTzeqNggBwQxJnsymPKEG//6Zs6UHae6CzsXufLbI5r8xvUsxIMw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JuaBmTRR; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JuaBmTRR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C0BC11F000E9; Thu, 3 Sep 2026 13:00:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788440443; bh=iegNva3kkOGJqjCoKK1iRqK5iFz7ZD4YDy8u6AOCQVc=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=JuaBmTRR2rTrs+dzlAeqYCZZFwDrmCKGd3uT8IPDU4YSqKWK3PnBdTDk20//uAy14 VhPiw1hy90EnkF/yrhvEX7blaDtM3iCXX1+a9rm4cqngxZCvjrdIUo8N781ht6zl+n ZGoDZzuJJYpfO52npPPSmT0MeXUx02U5Q0coe1Wf3yoobyrmJ5UjDj6FcyKudyS2Jj X0T8F3vy4cqCKhKe6SXb8Ug76wWClmniPyilsvJylEG194A+/lA3V9k/cDkCjZB0+G 2R/m1C6D5+LwDKC5MglHBL2ieJISBwnsUKXQX1y0uJFG+uUeYP6EymykyJ8k++0rUo 0vWPUZHVHHUZQ== Date: Thu, 3 Sep 2026 15:00:39 +0200 From: Krzysztof Kozlowski To: Yixun Lan Cc: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Adrian Hunter , Long Wan , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/4] dt-bindings: mmc: spacemit,sdhci: Add tx delay property Message-ID: <20260903-tactful-scorpion-from-nibiru-a4ebe2@quoll> References: <20260902-07-k3-sdhci-dts-v1-0-4e7909cf4233@kernel.org> <20260902-07-k3-sdhci-dts-v1-2-4e7909cf4233@kernel.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260902-07-k3-sdhci-dts-v1-2-4e7909cf4233@kernel.org> On Wed, Sep 02, 2026 at 07:03:13AM +0000, Yixun Lan wrote: > From: Long Wan > > Introduce a vendor specific property to configure the step count of TX > delay line which should be applied before RX tuning, compensating for > board level trace differences. The TX delay line result comes from test > out of real board which vary from different hardware layout. > > Signed-off-by: Long Wan > Signed-off-by: Yixun Lan > --- > Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml b/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml > index f35bf7ce08dd..3399a2d076dc 100644 > --- a/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml > +++ b/Documentation/devicetree/bindings/mmc/spacemit,sdhci.yaml > @@ -63,6 +63,16 @@ properties: > pinctrl-1: > description: Optional pinctrl state for 1.8V UHS operation with "uhs" name > > + spacemit,tx-delay: > + $ref: /schemas/types.yaml#/definitions/uint32 > + minimum: 0 > + maximum: 255 default: 0, I guess? Best regards, Krzysztof