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Subject[PATCH 2/4] arm64: dts: meson: disable pad bias for mmc pinmuxes
Date
In some cases (such as a boot from SPI) the bootloader or the ROM code may
leave a bias pull-down on the mmc pins. If so the MMC will fail during the
initialisation.

Explicitly disabling the pinmux solves the problem.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
arch/arm64/boot/dts/amlogic/meson-axg.dtsi | 2 ++
arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 4 ++++
arch/arm64/boot/dts/amlogic/meson-gxl.dtsi | 4 ++++
3 files changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
index e86f5f721f8f..bc427b9d3e13 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
@@ -273,6 +273,7 @@
"emmc_cmd",
"emmc_ds";
function = "emmc";
+ bias-disable;
};
};

@@ -503,6 +504,7 @@
"sdio_cmd",
"sdio_clk";
function = "sdio";
+ bias-disable;
};
};

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
index 1cb8e7e0d0da..32ef82321340 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
@@ -363,6 +363,7 @@
"emmc_cmd",
"emmc_clk";
function = "emmc";
+ bias-disable;
};
};

@@ -370,6 +371,7 @@
mux {
groups = "emmc_ds";
function = "emmc";
+ bias-disable;
};
};

@@ -416,6 +418,7 @@
"sdcard_cmd",
"sdcard_clk";
function = "sdcard";
+ bias-disable;
};
};

@@ -436,6 +439,7 @@
"sdio_cmd",
"sdio_clk";
function = "sdio";
+ bias-disable;
};
};

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
index 7cfee40d89e9..cfeec5579726 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
@@ -310,6 +310,7 @@
"emmc_cmd",
"emmc_clk";
function = "emmc";
+ bias-disable;
};
};

@@ -317,6 +318,7 @@
mux {
groups = "emmc_ds";
function = "emmc";
+ bias-disable;
};
};

@@ -363,6 +365,7 @@
"sdcard_cmd",
"sdcard_clk";
function = "sdcard";
+ bias-disable;
};
};

@@ -383,6 +386,7 @@
"sdio_cmd",
"sdio_clk";
function = "sdio";
+ bias-disable;
};
};

--
2.19.1
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