[PATCH] ARM: mvebu: dts: omnia: enable eMMC writes
Currently it's not possible to write anything into eMMC from U-Boot, so fix this by disabling the default write protection.
Cc: Marek Behún marek.behun@nic.cz Signed-off-by: Petr Štetiar ynezz@true.cz --- arch/arm/dts/armada-385-turris-omnia.dts | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm/dts/armada-385-turris-omnia.dts b/arch/arm/dts/armada-385-turris-omnia.dts index 5511c84849ee..5bb0b9c07e48 100644 --- a/arch/arm/dts/armada-385-turris-omnia.dts +++ b/arch/arm/dts/armada-385-turris-omnia.dts @@ -85,6 +85,7 @@ bus-width = <8>; no-1-8-v; non-removable; + disable-wp; };
usb3@f0000 {
On Mon, 22 Feb 2021 16:01:10 +0100 Petr Štetiar ynezz@true.cz wrote:
Currently it's not possible to write anything into eMMC from U-Boot, so fix this by disabling the default write protection.
Cc: Marek Behún marek.behun@nic.cz Signed-off-by: Petr Štetiar ynezz@true.cz
arch/arm/dts/armada-385-turris-omnia.dts | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm/dts/armada-385-turris-omnia.dts b/arch/arm/dts/armada-385-turris-omnia.dts index 5511c84849ee..5bb0b9c07e48 100644 --- a/arch/arm/dts/armada-385-turris-omnia.dts +++ b/arch/arm/dts/armada-385-turris-omnia.dts @@ -85,6 +85,7 @@ bus-width = <8>; no-1-8-v; non-removable;
disable-wp; }; usb3@f0000 {
Hi,
0. subject tag should be [PATCH u-boot-marvell] and Stefan Roese should be in To: header
1. please make subject prefix contain turris_omnia, instead of just omnia, and instead "enable eMMC writes" use "disable eMMC write protection"
2. do this by changing armada-385-turris-omnia-u-boot.dtsi, instead of changing armada-385-turris-omnia.dts. This file is meant to be same as in Linux, u-boot specific changes should be in -u-boot.dtsi file
Marek
On Mon, 22 Feb 2021 17:03:22 +0100 Marek Behun marek.behun@nic.cz wrote:
On Mon, 22 Feb 2021 16:01:10 +0100 Petr Štetiar ynezz@true.cz wrote:
--- a/arch/arm/dts/armada-385-turris-omnia.dts +++ b/arch/arm/dts/armada-385-turris-omnia.dts @@ -85,6 +85,7 @@ bus-width = <8>; no-1-8-v; non-removable;
disable-wp;
Hmm,
Linux Documentation/devicetree/bindings/mmc/mmc-controller.yaml says this about `disable-wp`:
When set, no physical write-protect line is present. This property should only be specified when the controller has a dedicated write-protect detection logic. If a GPIO is always used for the write-protect detection logic, it is sufficient to not specify the wp-gpios property in the absence of a write-protect line. Not used in combination with eMMC or SDIO.
There is no wp control mechanism on Omnia. No GPIO or anything. So according to documentation, this property should not be used here, and U-Boot is doing something wrong when it denies writes.
Marek
participants (2)
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Marek Behun -
Petr Štetiar