dts: msm8226: Add HTC One Mini 2 (memul)

In the current code the display is not drawn correctly, this is fixed
through PR #299.

README.md

@@ -115,6 +115,7 @@ page on the EFIDroid wiki for an exact mapping of LK targets to SoCs.
 ### lk2nd-msm8226
 - ASUS ZenWatch 2 - sparrow
 - Coolpad 8730L - 8730l
+- HTC One Mini 2 - memul (quirky - see comment in `dts/msm8226/msm8926-htc-memul.dts`)
 - Huawei Ascend G6 4G - G6-L11 (quirky - see comment in `dts/msm8226/msm8926-huawei-g6-l11-vb.dts`)
 - Huawei Watch - sturgeon
 - LG G Watch R - lenok (use `lk2nd-appended-dtb.img`)

dts/msm8226/msm8926-htc-memul.dts

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/dts-v1/;
+
+/*
+ * Compile lk2nd with the following flags so that various lk2nd functionality
+ * works fine, e.g. fastboot oem lk_log && fastboot get_staged /dev/stdout
+ *
+ * SCRATCH_ADDR=0x20000000 SCRATCH_ADDR_512MAP=0x20000000 SCRATCH_SIZE_512MAP=0x10000000
+ *
+ * On this device the memory at 0x10000000 (default scratch memory address)
+ * allows writes but any read just returns zeroes. From Linux perspective this
+ * is reserved memory so we need to choose a different memory address.
+ */
+
+#include <skeleton.dtsi>
+#include <lk2nd.h>
+
+/ {
+	/* Actually htc,project-id */
+	qcom,msm-id = <293 0 0>;
+
+	memul {
+		model = "HTC One Mini 2";
+		compatible = "htc,memul", "qcom,msm8926", "lk2nd,device";
+		lk2nd,match-cmdline = "* mdss_mdp.panel=1:dsi:0:qcom,mdss_dsi_mem_lg_novatek_35521_720p_video *";
+
+		lk2nd,keys =
+			<KEY_VOLUMEDOWN 107 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>,
+			<KEY_VOLUMEUP   108 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+	};
+};

dts/msm8226/rules.mk

@@ -8,6 +8,7 @@ DTBS += \
 	$(LOCAL_DIR)/apq8026-samsung-r03.dtb \
 	$(LOCAL_DIR)/msm8226-motorola-falcon.dtb \
 	$(LOCAL_DIR)/msm8226-samsung-ms013g.dtb \
+	$(LOCAL_DIR)/msm8926-htc-memul.dtb \
 	$(LOCAL_DIR)/msm8926-huawei-g6-l11-vb.dtb \
 	$(LOCAL_DIR)/msm8926-samsung-r02.dtb \
 	$(LOCAL_DIR)/msm8926-v2-720p-mtp.dtb