linux-kernel - RE: [PATCH V6 3/4] ufs: pltfrm: Add DT support to limit HS gear and gear rate

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Message-ID: <06fc01dc285b$fcb77a10$f6266e30$@samsung.com>
Date: Thu, 18 Sep 2025 10:50:42 +0530
From: "Alim Akhtar" <alim.akhtar@...sung.com>
To: "'Ram Kumar Dwivedi'" <quic_rdwivedi@...cinc.com>,
	<avri.altman@....com>, <bvanassche@....org>, <robh@...nel.org>,
	<krzk+dt@...nel.org>, <conor+dt@...nel.org>, <mani@...nel.org>,
	<James.Bottomley@...senPartnership.com>, <martin.petersen@...cle.com>
Cc: <linux-scsi@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>, "'Nitin
 Rawat'" <quic_nitirawa@...cinc.com>
Subject: RE: [PATCH V6 3/4] ufs: pltfrm: Add DT support to limit HS gear and
 gear rate



> -----Original Message-----
> From: Ram Kumar Dwivedi <quic_rdwivedi@...cinc.com>
> Sent: Wednesday, September 17, 2025 7:40 PM
> To: alim.akhtar@...sung.com; avri.altman@....com; bvanassche@....org;
> robh@...nel.org; krzk+dt@...nel.org; conor+dt@...nel.org; mani@...nel.org;
> James.Bottomley@...senPartnership.com; martin.petersen@...cle.com
> Cc: linux-scsi@...r.kernel.org; devicetree@...r.kernel.org; linux-
> kernel@...r.kernel.org; linux-arm-msm@...r.kernel.org; Nitin Rawat
> <quic_nitirawa@...cinc.com>
> Subject: [PATCH V6 3/4] ufs: pltfrm: Add DT support to limit HS gear and
gear
> rate
> 
> Introduce parsing of 'limit-hs-gear' and 'limit-gear-rate'
> device tree properties to restrict high-speed gear and rate during
initialization.
> 
> This is useful in cases where the customer board may have signal
integrity, clock
> configuration or layout issues that prevent reliable operation at higher
gears.
> Such limitations are especially critical in those platforms, where
stability is
> prioritized over peak performance.
> 
> Co-developed-by: Nitin Rawat <quic_nitirawa@...cinc.com>
> Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
> Signed-off-by: Ram Kumar Dwivedi <quic_rdwivedi@...cinc.com>
> ---

Reviewed-by: Alim Akhtar <alim.akhtar@...sung.com>