arm64: dts: qcom: Add device tree for SDM636

This SoC is almost identical to its older brother,
SDM660, with a few minor exceptions like the
different GPU.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210728222542.54269-26-konrad.dybcio@somainline.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sdm636.dtsi

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2020, AngeloGioacchino Del Regno <kholk11@gmail.com>
+ * Copyright (c) 2020, Konrad Dybcio <konradybcio@gmail.com>
+ * Copyright (c) 2020, Martin Botka <martin.botka1@gmail.com>
+ */
+
+#include "sdm660.dtsi"
+
+/*
+ * According to the downstream DTS,
+ * 636 is basically a 660 except for
+ * different CPU frequencies, Adreno
+ * 509 instead of 512 and lack of
+ * turing IP. These differences will
+ * be addressed when the aforementioned
+ * peripherals will be enabled upstream.
+ */
+
+&adreno_gpu {
+	compatible = "qcom,adreno-509.0", "qcom,adreno";
+	/* Adreno 509 shares the frequency table with 512 */
+};