[PATCH v2 7/8] arm: u8500: Switch Stemmy to upstream Janice device tree

Use the upstream Samsung Janice device tree as the initial target for
the Stemmy configuration. This also prepares the board to share the
upstream Ux500 Samsung device trees with Linux.

U-Boot does not yet implement the U8500 clock providers used by the
upstream device tree. Add a U-Boot-specific overlay with the known MTU
clock rate and a fixed input clock for the external SD controller.

Signed-off-by: Linus Walleij <[email protected]>
---
 arch/arm/dts/u8500-u-boot.dtsi | 20 ++++++++++++++++++++
 configs/stemmy_defconfig       |  3 ++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/arch/arm/dts/u8500-u-boot.dtsi b/arch/arm/dts/u8500-u-boot.dtsi
new file mode 100644
index 000000000000..41eaad7f78b9
--- /dev/null
+++ b/arch/arm/dts/u8500-u-boot.dtsi
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+/ {
+	/* FIXME: Remove this when the U8500 clock driver is implemented */
+	sdmmcclk: sdmmcclk {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <100000000>;
+	};
+
+	soc {
+		mtu@a03c6000 {
+			clock-frequency = <133000000>;
+		};
+
+		mmc@80126000 {
+			clocks = <&sdmmcclk>;
+		};
+	};
+};
diff --git a/configs/stemmy_defconfig b/configs/stemmy_defconfig
index 57e794c5c88b..1f512416c9f4 100644
--- a/configs/stemmy_defconfig
+++ b/configs/stemmy_defconfig
@@ -11,7 +11,8 @@ CONFIG_SYS_MALLOC_F_LEN=0x400
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
 CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x100000
-CONFIG_DEFAULT_DEVICE_TREE="ste-ux500-samsung-stemmy"
+CONFIG_DEFAULT_DEVICE_TREE="st/ste-ux500-samsung-janice"
+CONFIG_OF_UPSTREAM=y
 CONFIG_SYS_BOOTM_LEN=0x4000000
 CONFIG_SYS_LOAD_ADDR=0x100000
 CONFIG_BOOTSTD_FULL=y

-- 
2.55.0