diff options
author | Stefan Agner <stefan.agner@toradex.com> | 2017-11-15 12:58:41 +0100 |
---|---|---|
committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2017-12-21 14:30:23 +0100 |
commit | 5f60d82d38a8af8529d1493463e301e548595ccb (patch) | |
tree | bbaa567642e3671fc6adcaed7b676fd51444a22c /arch/arm/boot | |
parent | 970e1777975ea5279f7c7d269b52da7114352a9c (diff) |
ARM: dts: colibri-imx7: limit eMMC SDHC frequency to 100MHz
During temperature testing modules print the following error every
now and then:
[ 12.231006] mmc0: Timeout waiting for hardware interrupt. retries left=0 opcode=12
Often the SDHC controller/driver does not recover from the issue
which leads to a Kernel panic (e.g. during boot the kernel can not
mount the root fs).
Lowering the frequency to 100MHz proves to be stable and affects
effective bandwith by less than 5%.
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Max Krummenacher <max.krummenacher@toradex.com>
(cherry picked from commit 166fb4842e780f63c31622af706335e7dcd48c24)
Diffstat (limited to 'arch/arm/boot')
-rw-r--r-- | arch/arm/boot/dts/imx7-colibri.dtsi | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/imx7-colibri.dtsi b/arch/arm/boot/dts/imx7-colibri.dtsi index cb45cd873edc..20e4cf597b80 100644 --- a/arch/arm/boot/dts/imx7-colibri.dtsi +++ b/arch/arm/boot/dts/imx7-colibri.dtsi @@ -336,6 +336,7 @@ assigned-clocks = <&clks IMX7D_USDHC3_ROOT_CLK>; assigned-clock-rates = <400000000>; bus-width = <8>; + max-frequency = <100000000>; non-removable; }; |