From 427120681a547c6891f5e458abab298ea7fea472 Mon Sep 17 00:00:00 2001
From: Tejas Bhumkar <tejas.arvind.bhumkar@amd.com>
Date: Thu, 21 Mar 2024 14:22:20 +0530
Subject: [PATCH] arm64: zynqmp: Disable Tri-state for SDIO
Since the zynqmp pinctrl driver now includes support for the
tri-state registers, ensure that the pins needing output-enable
are correctly configured for SOMs.
Currently, there is an issue with the detection of the MMC for
the SOM kv260, resulting in the following error:
ZynqMP> mmc dev 1
Card did not respond to voltage select! : -110
To address this problem, configure the SDIO pins for output-enable
to enable MMC detection.
Signed-off-by: Tejas Bhumkar <tejas.arvind.bhumkar@amd.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/20240321085220.2920792-2-tejas.arvind.bhumkar@amd.com
---
arch/arm/dts/zynqmp-sck-kv-g-revA.dtso | 1 +
arch/arm/dts/zynqmp-sck-kv-g-revB.dtso | 1 +
2 files changed, 2 insertions(+)
diff --git a/arch/arm/dts/zynqmp-sck-kv-g-revA.dtso b/arch/arm/dts/zynqmp-sck-kv-g-revA.dtso
index 6d0d5c487d..561b546e37 100644
--- a/arch/arm/dts/zynqmp-sck-kv-g-revA.dtso
+++ b/arch/arm/dts/zynqmp-sck-kv-g-revA.dtso
@@ -342,6 +342,7 @@
slew-rate = <SLEW_RATE_SLOW>;
power-source = <IO_STANDARD_LVCMOS18>;
bias-disable;
+ output-enable;
};
conf-cd {
diff --git a/arch/arm/dts/zynqmp-sck-kv-g-revB.dtso b/arch/arm/dts/zynqmp-sck-kv-g-revB.dtso
index a4b4465d20..13876fb47d 100644
--- a/arch/arm/dts/zynqmp-sck-kv-g-revB.dtso
+++ b/arch/arm/dts/zynqmp-sck-kv-g-revB.dtso
@@ -329,6 +329,7 @@
slew-rate = <SLEW_RATE_SLOW>;
power-source = <IO_STANDARD_LVCMOS18>;
bias-disable;
+ output-enable;
};
conf-cd {
--
2.39.5