Re: [PATCH v2 5/5] ARM: dts: sunxi: Use new sun7i-a20-mmc compatible on sun7i and newer
From: Maxime Ripard <hidden>
Date: 2016-08-22 07:54:54
Also in:
linux-arm-kernel, linux-mmc
On Mon, Aug 01, 2016 at 02:11:09PM +0100, Andre Przywara wrote:
Hi Hans, On 30/07/16 15:25, Hans de Goede wrote:quoted
Use the new sun7i-a20-mmc compatible for the mmc controllers on sun7i and newer. Signed-off-by: Hans de Goede <redacted> --- Changes in v2: -New patch in v2 of this patch-set --- arch/arm/boot/dts/sun6i-a31.dtsi | 8 ++++---- arch/arm/boot/dts/sun7i-a20.dtsi | 8 ++++---- arch/arm/boot/dts/sun8i-a23-a33.dtsi | 6 +++--- arch/arm/boot/dts/sun8i-h3.dtsi | 6 +++--- 4 files changed, 14 insertions(+), 14 deletions(-)diff --git a/arch/arm/boot/dts/sun6i-a31.dtsi b/arch/arm/boot/dts/sun6i-a31.dtsi index 1867af2..0d24f10 100644 --- a/arch/arm/boot/dts/sun6i-a31.dtsi +++ b/arch/arm/boot/dts/sun6i-a31.dtsi@@ -469,7 +469,7 @@ }; mmc0: mmc@01c0f000 { - compatible = "allwinner,sun5i-a13-mmc"; + compatible = "allwinner,sun7i-a20-mmc";But that breaks systems with newer DTs on older kernels, which do not know about sun7i-a20-mmc.
That's not backward compatibility. That's the forward one, and that has never been something we supported. See https://www.kernel.org/doc/Documentation/devicetree/bindings/ABI.txt Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com