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From: Judith Mendez <jm@ti.com>
To: Judith Mendez <jm@ti.com>, Nishanth Menon <nm@ti.com>,
	Vignesh Raghavendra <vigneshr@ti.com>
Cc: Tero Kristo <kristo@kernel.org>, Rob Herring <robh@kernel.org>,
	"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	Moteen Shah <m-shah@ti.com>, Andrew Davis <afd@ti.com>
Subject: [PATCH 0/4] Fix MMC pin pull configurations
Date: Thu, 12 Feb 2026 12:42:42 -0600	[thread overview]
Message-ID: <20260212184246.2316659-1-jm@ti.com> (raw)

This series corrects MMC pin pull-up/pull-down configurations across
TI AM62L EVM, AM62P SK, & AM62 LP SK boards to properly match their
hardware design.

Most boards have external pull-ups on MMC pins, but DT configuration
was also enabling internal pulls. Having both internal and external
pulls active causes several issues:
- Unnecessary power consumption due to reduced total resistance
- Potential timing issues with higher speed modes due to mismatched
  rise/fall times across data lines

One board (AM62 LP SK) lacks external pulls on eMMC data pins and
requires internal pulls to be explicitly enabled to prevent floating
lines.

All changes are based on the respective board schematics referenced
in each patch.

Judith Mendez (4):
  arm64: dts: ti: k3-am62p5-sk: Disable MMC1 internal pulls on data
    lines
  arm64: dts: ti: k3-am62l-evm: Disable MMC0 internal pulls
  arm64: dts: ti: k3-am62l-evm: Disable MMC1 internal pulls on data pins
  arm64: dts: ti: k3-am62-lp-sk: Enable internal pulls for MMC0 data
    pins

 arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts | 14 +++++++-------
 arch/arm64/boot/dts/ti/k3-am62l3-evm.dts | 10 +++++-----
 arch/arm64/boot/dts/ti/k3-am62p5-sk.dts  |  6 +++---
 3 files changed, 15 insertions(+), 15 deletions(-)

-- 
2.52.0


             reply	other threads:[~2026-02-12 18:42 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-12 18:42 Judith Mendez [this message]
2026-02-12 18:42 ` [PATCH 1/4] arm64: dts: ti: k3-am62p5-sk: Disable MMC1 internal pulls on data lines Judith Mendez
2026-02-12 18:42 ` [PATCH 2/4] arm64: dts: ti: k3-am62l-evm: Disable MMC0 internal pulls Judith Mendez
2026-02-20  8:57   ` Moteen Shah
2026-02-23 20:15     ` Judith Mendez
2026-02-12 18:42 ` [PATCH 3/4] arm64: dts: ti: k3-am62l-evm: Disable MMC1 internal pulls on data pins Judith Mendez
2026-02-12 18:42 ` [PATCH 4/4] arm64: dts: ti: k3-am62-lp-sk: Enable internal pulls for MMC0 " Judith Mendez
2026-02-20  9:00   ` Moteen Shah
2026-02-20  8:49 ` [PATCH 0/4] Fix MMC pin pull configurations Moteen Shah

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