Booting of Odroid U3/X2 with SD card, ends with error:
MMC: EXYNOS DWMMC: 0 Card did not respond to voltage select! *** Warning - MMC init failed, using default environment
Generally this was broken, because of wrong addresses, assigned to GPIOs. The source of the problem was in rework of lib/fdtdec.c, after which function fdtdec_get_addr() doesn't work as previous and function dev_get_addr() doesn't works as expected.
The code after rework in lib/fdtdec.c assumed, that #size-cells property, should be always greater or equal to 1, this was wrong, because it can be 0.
In case of debugging the issue, I found, that mmc clock was computed wrong, for Exynos4, because of function get_mmc_clk(), which always returns -1 for this SoC.
The patchset should fix booting on all Exynos4 boards, however it was tested on: Odroid X2 / U3 / XU3 and Trats / Trats2.
Przemyslaw Marczak (4): fdtdec: fix parsing 'reg' property with zero value in '#size-cells' gpio: s5p: call: dev_get_addr() instead of fdtdec_get_addr() mach-exynos: clock: restore calling dead exynos4_get_mmc_clk() trats: fdt: disable unused DW MMC
arch/arm/dts/exynos4210-trats.dts | 4 ++++ arch/arm/mach-exynos/clock.c | 10 ++++------ drivers/gpio/s5p_gpio.c | 18 +++++++++++------- lib/fdtdec.c | 2 +- 4 files changed, 20 insertions(+), 14 deletions(-)