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 v2 0/3] Fix MMC pin pull configurations
Date: Mon, 23 Feb 2026 17:37:28 -0600 [thread overview]
Message-ID: <20260223233731.2690472-1-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 stronger pull resistance
- Floating pins violating SPEC recommendations
All changes are based on the respective board schematics referenced
in each patch.
Changes since v1:
- improved all commit descriptions
- removed incorrect claim: potential issues for modes with tighter
timing requirements due to mismatched pull strengths between D0 and
remaining data pins
- drop patch 2/4. While there is a host side mismatch between D0 and
D1-D7 pins, leaving internal pullup on D0 equals a stronger pull,
helping with poor board design issues and better matching D0 pullup
strength with D1-D7 after taking into account eMMC card pullups on
D1-D7 pins
- rebased against ti-k3-dts-next
Link to v1:
https://lore.kernel.org/all/20260212184246.2316659-1-jm@ti.com/
Judith Mendez (3):
arm64: dts: ti: k3-am62p5-sk: Disable MMC1 internal pulls on data pins
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 | 6 +++---
arch/arm64/boot/dts/ti/k3-am62p5-sk.dts | 6 +++---
3 files changed, 13 insertions(+), 13 deletions(-)
--
2.52.0
next reply other threads:[~2026-02-23 23:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-23 23:37 Judith Mendez [this message]
2026-02-23 23:37 ` [PATCH v2 1/3] arm64: dts: ti: k3-am62p5-sk: Disable MMC1 internal pulls on data pins Judith Mendez
2026-02-23 23:37 ` [PATCH v2 2/3] arm64: dts: ti: k3-am62l-evm: " Judith Mendez
2026-02-23 23:37 ` [PATCH v2 3/3] arm64: dts: ti: k3-am62-lp-sk: Enable internal pulls for MMC0 " Judith Mendez
2026-03-19 8:02 ` [PATCH v2 0/3] Fix MMC pin pull configurations Francesco Dolcini
2026-03-23 15:43 ` Judith Mendez
2026-03-27 4:56 ` Vignesh Raghavendra
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