This is tested and works on ubnt-erx. Unfortunately I do not have official datasheet for this SoC so I had to guess memory region size. Those numbers may need to be tweaked if there are devices that need larger memory region or if datasheet has something to say about them.
Signed-off-by: Nikolay Martynov <[email protected]> --- .../0060-mt7621-set-up-palmbus-memory-region.patch | 36 ++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 target/linux/ramips/patches-4.3/0060-mt7621-set-up-palmbus-memory-region.patch diff --git a/target/linux/ramips/patches-4.3/0060-mt7621-set-up-palmbus-memory-region.patch b/target/linux/ramips/patches-4.3/0060-mt7621-set-up-palmbus-memory-region.patch new file mode 100644 index 0000000..d8c1b85 --- /dev/null +++ b/target/linux/ramips/patches-4.3/0060-mt7621-set-up-palmbus-memory-region.patch @@ -0,0 +1,36 @@ +--- a/arch/mips/include/asm/mach-ralink/mt7621.h ++++ b/arch/mips/include/asm/mach-ralink/mt7621.h +@@ -13,6 +13,9 @@ + #ifndef _MT7621_REGS_H_ + #define _MT7621_REGS_H_ + ++#define MT7621_PALMBUS_BASE 0x1E000000 ++#define MT7621_PALMBUS_SIZE 0x001FFFFF ++ + #define MT7621_SYSC_BASE 0x1E000000 + + #define SYSC_REG_CHIP_NAME0 0x00 +--- a/arch/mips/ralink/mt7621.c ++++ b/arch/mips/ralink/mt7621.c +@@ -199,6 +199,21 @@ void prom_soc_init(struct ralink_soc_inf + mips_cm_probe(); + mips_cpc_probe(); + ++ if (mips_cm_numiocu()) { ++ /* mips_cm_probe() wipes out bootloader ++ config for CM regions and we have to configure them ++ again. This SoC cannot talk to pamlbus devices ++ witout proper iocu region set up. ++ ++ FIXME: it would be better to do this with values ++ from DT, but we need this very early because ++ without this wecannot talk to pretty much anything ++ including serial. ++ */ ++ write_gcr_reg0_base(MT7621_PALMBUS_BASE); ++ write_gcr_reg0_mask(~MT7621_PALMBUS_SIZE | CM_GCR_REGn_MASK_CMTGT_IOCU0); ++ } ++ + if (!register_cps_smp_ops()) + return; + if (!register_cmp_smp_ops()) -- 2.6.4 _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
