linux-kernel - [RFC PATCH 00/13] Add tuning algorithm for delay chain

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Date: Tue, 30 Jan 2024 18:37:01 -0600
From: Judith Mendez <jm@...com>
To: Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley
	<conor+dt@...nel.org>
CC: Adrian Hunter <adrian.hunter@...el.com>, <linux-mmc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Nishanth Menon <nm@...com>,
        Vignesh
 Raghavendra <vigneshr@...com>, Andrew Davis <afd@...com>,
        Udit Kumar
	<u-kumar1@...com>, Roger Quadros <rogerq@...nel.org>,
        <devicetree@...r.kernel.org>, Randolph Sapp <rs@...com>
Subject: [RFC PATCH 00/13] Add tuning algorithm for delay chain

This patch series introduces a new tuning algorithm for
mmc. The new algorithm should be used when delay chain is
enabled. The ITAPDLY is selected from the largest passing
window and the buffer is not viewed as a circular buffer.
The new tuning algorithm is implemented as per the paper
published here [0] and has been tested on the following
platforms: AM62x SK, AM62A SK, AM62p SK, AM64x SK, and AM64x
EVM.

The series also includes a few fixes in the sdhci_am654
driver on OTAPDLYEN/ITAPDLYEN and ITAPDELSEL. There are
also device tree node fixes for missing mmc nodes,
modifying DLL properties, and fixes for OTAP/ITAP delay
values. 

MMC0/MMC2 nodes are introduced for AM62ax in this series.

This series is sent as a RFC mostly to get some feedback
and/or comments on the new tuning algorithm implementation.

[0] https://www.ti.com/lit/an/spract9/spract9.pdf

Judith Mendez (11):
  drivers: mmc: host: sdhci_am654: Add tuning algorithm for delay chain
  drivers: mmc: host: sdhci_am654: Write ITAPDLY for DDR52 timing
  drivers: mmc: host: sdhci_am654: Add missing OTAP/ITAP enable
  drivers: mmc: host: sdhci_am654: Add ITAPDLYSEL in
    sdhci_j721e_4bit_set_clock
  drivers: mmc: host: sdhci_am654: Fix ITAPDLY for HS400 timing
  arm64: dts: ti: k3-am62a-main: Add sdhci2 instance
  arm64: dts: ti: k3-am64-main: Update ITAP/OTAP values for MMC
  arm64: dts: ti: k3-am62-main: Update ITAP/OTAP values for MMC
  arm64: dts: ti: k3-am62p: Add missing properties for MMC
  arm64: dts: ti: k3-am6*: Remove DLL properties for soft phys
  arm64: dts: ti: k3-am6*: Reorganize MMC properties

Nitin Yadav (2):
  arm64: dts: ti: k3-am62a-main: Add sdhci0 instance
  arm64: dts: ti: k3-am62a7-sk: Enable eMMC support

 arch/arm64/boot/dts/ti/k3-am62-main.dtsi      |  57 +++--
 .../arm64/boot/dts/ti/k3-am625-beagleplay.dts |   5 -
 arch/arm64/boot/dts/ti/k3-am62a-main.dtsi     |  45 +++-
 arch/arm64/boot/dts/ti/k3-am62a7-sk.dts       |  27 ++-
 arch/arm64/boot/dts/ti/k3-am62p-main.dtsi     |  44 +++-
 arch/arm64/boot/dts/ti/k3-am62p5-sk.dts       |   7 +-
 .../arm64/boot/dts/ti/k3-am62x-sk-common.dtsi |   4 +-
 arch/arm64/boot/dts/ti/k3-am64-main.dtsi      |  17 +-
 arch/arm64/boot/dts/ti/k3-am642-evm.dts       |   4 +-
 arch/arm64/boot/dts/ti/k3-am642-sk.dts        |   2 -
 drivers/mmc/host/sdhci_am654.c                | 215 ++++++++++++++----
 11 files changed, 321 insertions(+), 106 deletions(-)

-- 
2.34.1