[Samsung Gear S] biktor_gj:
Ok, I'm going to have similar problems to the ones I found in Gear 2, but hopefully they will be easier to solve since the CPU is common.

By the way, the Gear S seems to be a miniatuized version of a Samsung Galaxy S3 Neo (the dual SIM model).

On tizen, it even shows config for the second SIM.

This is a piece of a logcat of an attempted android boot:

I/cm ( 216): ____ _ _ ____ _ _ ____ ____ ____ _ _ _ _ ____ ___

--------- beginning of system
I/Vold ( 211): Vold 2.1 (the revenge) firing up
E/Vold ( 211): failed to open /fstab.ponte-solo
E/Vold ( 211): Error reading configuration (No such file or directory)... continuing anyways
I/Cryptfs ( 211): Check if PFE is activated on Boot
E/Cryptfs ( 211): Unexpected value for crypto key location
E/Cryptfs ( 211): Error getting crypt footer and key
I/cm ( 233): | \_/ |__| |\ | | | | __ |___ |\ | |\/| | | | \
I/cm ( 236): |___ | | | | \| |__| |__] |___ | \| | | |__| |__/
I/SurfaceFlinger( 212): SurfaceFlinger is starting
I/SurfaceFlinger( 212): SurfaceFlinger's main thread ready to run. Initializing graphics H/W...
I/cm ( 244): Welcome to Android 5.1.1 / CyanogenMod-12.1-20150711-UNOFFICIAL-s3ve3g
D/libEGL ( 212): loaded /vendor/lib/egl/libEGL_adreno.so
D/libEGL ( 212): loaded /vendor/lib/egl/libGLESv1_CM_adreno.so
D/libEGL ( 212): loaded /vendor/lib/egl/libGLESv2_adreno.so
[...]
I/qdhwcomposer( 740): Initializing Qualcomm Hardware Composer
I/qdhwcomposer( 740): MDP version: 500
I/SurfaceFlinger( 740): Using composer version 1.4
I/qdhwcomposer( 740): hwc_registerProcs
I/qdhwcomposer( 740): Initializing UEVENT Thread
I/qdhwcomposer( 740): Initializing VSYNC Thread
E/qdutils ( 740): int qdutils::getHDMINode(): Failed to open fb node 2
E/qdutils ( 740): int qdutils::getHDMINode(): Failed to find HDMI node
E/qdutils ( 740): int qdutils::getHDMINode(): Failed to open fb node 2
E/qdutils ( 740): int qdutils::getHDMINode(): Failed to find HDMI node
E/qdutils ( 740): int qdutils::getHDMINode(): Failed to open fb node 2
E/qdutils ( 740): int qdutils::getHDMINode(): Failed to find HDMI node
D/qdhwcomposer( 740): hwc_getDisplayAttributes disp = 0, width = 360
D/qdhwcomposer( 740): hwc_getDisplayAttributes disp = 0, height = 480
E/qdhwcomposer( 740): hwc_getDisplayConfigs display (1) is inactive
I/SurfaceFlinger( 740): EGL information:
I/SurfaceFlinger( 740): vendor : Android
I/SurfaceFlinger( 740): version : 1.4 Android META-EGL
I/SurfaceFlinger( 740): extensions: EGL_KHR_get_all_proc_addresses EGL_ANDROID_presentation_time EGL_KHR_image EGL_KHR_image_base EGL_KHR_lock_surface EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_fence_sync EGL_KHR_create_context EGL_EXT_create_context_robustness EGL_ANDROID_image_native_buffer EGL_KHR_wait_sync EGL_ANDROID_recordable
I/SurfaceFlinger( 740): Client API: OpenGL_ES
I/SurfaceFlinger( 740): EGLSurface: 8-8-8-8, config=0x5
I/qdhwcomposer( 740): vsync_loop: Reading event 0 for dpy 0 from /sys/class/graphics/fb0/vsync_event
I/qdhwcomposer( 740): vsync_loop: Reading event 1 for dpy 0 from /sys/class/graphics/fb0/show_blank_event
I/qdhwcomposer( 740): vsync_loop: Reading event 0 for dpy 1 from /sys/class/graphics/fb-1/vsync_event
I/qdhwcomposer( 740): vsync_loop: Reading event 1 for dpy 1 from /sys/class/graphics/fb-1/show_blank_event
I/SurfaceFlinger( 740): OpenGL ES informations:
I/SurfaceFlinger( 740): vendor : Qualcomm
I/SurfaceFlinger( 740): renderer : Adreno (TM) 305
I/SurfaceFlinger( 740): version : OpenGL ES 3.0 V@84.0 AU@05.00.00.046.002 (CL@)
I/SurfaceFlinger( 740): extensions: GL_AMD_compressed_ATC_texture GL_AMD_performance_monitor GL_AMD_program_binary_Z400 GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_discard_framebuffer GL_EXT_robustness GL_EXT_texture_format_BGRA8888 GL_EXT_texture_type_2_10_10_10_REV GL_NV_fence GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth_texture GL_OES_depth24 GL_OES_EGL_image GL_OES_EGL_sync GL_OES_EGL_image_external GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_fragment_precision_high GL_OES_get_program_binary GL_OES_packed_depth_stencil GL_OES_depth_texture_cube_map GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_texture_3D GL_OES_texture_float GL_OES_texture_haf_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_half_float GL_OES_vertex_type_10_10_10_2 GL_OES_vertex_array_object GL_QCOM_alpha_test GL_QCOM_binning_control GL_QCOMdriver_control GL_QCOM_perfmon_global_mode GL_QCOM_extended_get GL_QCOM_extended_get2 GL_QCOM_tiled_rendering GL_QCOM_writeonly_rendering GL_EXT_sRGB GL_EXT_sRGB_write_con
I/SurfaceFlinger( 740): GL_MAX_TEXTURE_SIZE = 4096
I/SurfaceFlinger( 740): GL_MAX_VIEWPORT_DIMS = 4096
D/SurfaceFlinger( 740): Set power mode=2, type=0 flinger=0xb7d795e0
D/qdhwcomposer( 740): hwc_setPowerMode: Setting mode 2 on display: 0
I/qdhwcomposer( 740): handle_blank_event: dpy:0 panel power state: 1
D/qdhwcomposer( 740): hwc_setPowerMode: Done setting mode 2 on display 0
D/libEGL ( 759): loaded /vendor/lib/egl/libEGL_adreno.so
D/libEGL ( 759): loaded /vendor/lib/egl/libGLESv1_CM_adreno.so
D/libEGL ( 759): loaded /vendor/lib/egl/libGLESv2_adreno.so
I/Adreno-EGL( 759): <qeglDrvAPI_eglInitialize:410>: EGL 1.4 QUALCOMM build: AU_LINUX_ANDROID_LA.BF.1.1.1.C2.05.00.00.046.002_msm8974_LA.BF.1.1.1.C2__release_AU ()
I/Adreno-EGL( 759): OpenGL ES Shader Compiler Version: E031.25.03.00
I/Adreno-EGL( 759): Build Date: 01/06/15 Tue
I/Adreno-EGL( 759): Local Branch: mybranch6793908
I/Adreno-EGL( 759): Remote Branch: quic/LA.BF.1.1.1.c2
I/Adreno-EGL( 759): Local Patches: NONE
I/Adreno-EGL( 759): Reconstruct Branch: AU_LINUX_ANDROID_LA.BF.1.1.1.C2.05.00.00.046.002 + NOTHING
E/BootAnimation( 759): couldn't find audio_conf.txt
D/BootAnimation( 759): Use save memory method, maybe small fps in actual.

Nothing shows up in the screen though, I'm going to need a nice code rework on the kernel side before the bootlogo disappears...

I have two choices: backport the board config to the Galaxy S3 Neo tree, or try to update it to match sprat (Gear Live). I will try first to work with sprat for better compatibility. If that doesn't seem to work, will try with neo.

But hey, I've been two days with this toy and it almost starts booting! not bad ;)