• Tony Lindgren's avatar
    soc: ti: omap-prm: Fix reboot issue with invalid pcie reset map for dra7 · a249ca66
    Tony Lindgren authored
    Yongqin Liu <yongqin.liu@linaro.org> reported an issue where reboot hangs
    on beagleboard-x15. This started happening after commit 7078a5ba
    ("soc: ti: omap-prm: Fix boot time errors for rst_map_012 bits 0 and 1").
    
    We now assert any 012 type resets on init to prevent unconfigured
    accelerator MMUs getting enabled on init depending on the bootloader or
    kexec configured state.
    
    Turns out that we now also wrongly assert dra7 l3init domain PCIe reset
    bits causing a hang during reboot. Let's fix the l3init reset bits to
    use a 01 map instead of 012 map. There are only two rstctrl bits and not
    three. This is documented in TRM "Table 3-1647. RM_PCIESS_RSTCTRL".
    
    Fixes: 5a68c87a ("soc: ti: omap-prm: dra7: add genpd support for remaining PRM instances")
    Fixes: 7078a5ba ("soc: ti: omap-prm: Fix boot time errors for rst_map_012 bits 0 and 1")
    Cc: Kishon Vijay Abraham I <kishon@ti.com>
    Reported-by: default avatarYongqin Liu <yongqin.liu@linaro.org>
    Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
    a249ca66
omap_prm.c 24.7 KB