I pulled out Kevin's linux-omap PM tree this morning by: git init git clone git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm.git cd linux-omp-pm git checkout -b pm origin/pm 1) Cloned arch/arm/mach-omap2/board-omap3beagle.c to arch/arm/mach-omap2/board-omap3lv_som.c, and ifdef'd out all calls to omap_cfg_reg and gpio calls (since the GPIO on my board is different than beagle). 2) Added the following to arch/arm/mach-omap2/Makefile: obj-$(CONFIG_MACH_OMAP3530_LV_SOM) += board-omap3lv_som.o \ mmc-twl4030.o \ twl4030-generic-scripts.o 3) Added the following to arch/arm/mach-omap2/Kconfig config MACH_OMAP3530_LV_SOM bool "OMAP3 Logic 35x LV SOM board" depends on ARCH_OMAP3 && ARCH_OMAP34XX 4) Copied Kevin's beagle.pm.config to .config 5) Ran menuconfig, deselected "OMAP3 BEAGLE board" and selected "OMAP3 Logic 35x LV SOM board", selected "Kernel low-level debugging function (DEBUG_LL)", changed "Low-level debug console UART" to UART1, turned on OMAP_MUX, OMAP_MUX_DEBUG, disabled USB and the OMAP host/otg USB controllers, and saved the results, built uImage. When I first ran the kernel I got: <5>Linux version 2.6.29-omap1 (peter@blackhole) (gcc version 4.1.2) #17 PREEMPT Thu Mar 26 15:37:52 EDT 2009 CPU: ARMv7 Processor [411fc082] revision 2 (ARMv7), cr=10c5387f CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction cache Machine: OMAP OMAP3530LV_SOM board Memory policy: ECC disabled, Data cache writeback <7>On node 0 totalpages: 32768 <7>free_area_init_node: node 0, pgdat c0396e74, node_mem_map c03c1000 <7> Normal zone: 256 pages used for memmap <7> Normal zone: 0 pages reserved <7> Normal zone: 32512 pages, LIFO batch:7 <6>OMAP3430 ES2.1 <6>SRAM: Mapped pa 0x40200000 to va 0xd7000000 size: 0x100000 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32512 <5>Kernel command line: display=3 console=ttyS0,115200 root=/dev/nfs rw nfsroot=192.168.3.5:/opt/nfs-exports/ltib-omap,wsize=1500,rsize=1500 ip=dhcp ignore_loglevel no_console_suspend initcall_debug <6>debug: ignoring loglevel setting. <6>Clocking rate (Crystal/DPLL/ARM core): 26.0/166/500 MHz <6>Reprogramming SDRC <6>GPMC revision 5.0 gpmc_mem_init: cs 0 base 0x30000000 size 0x8000000 <2>kernel BUG at arch/arm/mach-omap2/gpmc.c:438! <1>Unable to handle kernel NULL pointer dereference at virtual address 00000000 <1>pgd = c0004000 <1>[00000000] *pgd=00000000 Internal error: Oops: 805 [#1] PREEMPT Modules linked in: CPU: 0 Not tainted (2.6.29-rc8-omap1 â) PC is at cache_init+0x608dca41/0x60b3392d LR is at cache_init+0x6090515d/0x60b3392d pc : [<c002e9a0>] lr : [<c00570bc>] psr: 400001d3 sp : c036df40 ip : c036de98 fp : c036df4c r10: 00000000 r9 : 411fc082 r8 : c0398700 r7 : 00000000 r6 : c036c000 r5 : 30000000 r4 : fffffff0 r3 : 00000000 r2 : c036c000 r1 : 800001d3 r0 : 00000031 <1>Unable to handle kernel NULL pointer dereference at virtual address 00000013 <1>Unhandled fault: alignment exception (0x001) at 0xe1a040c2 Internal error: : 1 [#2] PREEMPT Modules linked in: CPU: 0 Not tainted (2.6.29-rc8-omap1 â) PC is at cache_init+0x608df1b5/0x60b3392d LR is at 0xe3e07002 pc : [<c0031114>] lr : [<e3e07002>] psr: 000001d3 sp : c0067ed0 ip : c0067f10 fp : c0067f0c r10: 00000000 r9 : 400001d3 r8 : 159f00dc r7 : c0067fd8 r6 : e1a04006 r5 : 00000560 r4 : ffffffff r3 : c0066000 r2 : c0067fd8 r1 : 00000005 r0 : 159f00dc <1>Unhandled fault: alignment exception (0x001) at 0xe1a040c2 Internal error: : 1 [#3] PREEMPT Modules linked in: CPU: 0 Not tainted (2.6.29-rc8-omap1 â) PC is at cache_init+0x608df1b5/0x60b3392d LR is at 0xe3e07005 pc : [<c0031114>] lr : [<e3e07005>] psr: 000001d3 sp : c00679e0 ip : c0067a20 fp : c0067a1c r10: c039e5d0 r9 : 400001d3 r8 : 00000013 r7 : c0067ae8 r6 : e1a04006 r5 : 00000000 r4 : ffffffff r3 : c0066000 r2 : c0067ae8 r1 : 00000005 r0 : 00000013 <1>Unhandled fault: alignment exception (0x001) at 0xea000177 <1>Unhandled fault: alignment exception (0x001) at 0xea000177 <1>Unhandled fault: alignment exception (0x001) at 0xea000177 I changed the call to omap_init_common_hw to pass in four NULLs (as I think the sdrc params for mt46h32m32lf6 (somehow?) don't match the mt29c2g24maklajg-75 used on our board. This lets the kernel go farther, (though I do get "<3>dpll3_m2_clk rate change failed: -22" before the "GPMC revision 5.0" message) but it hangs in rtc_hctosys, and further printk debugging shows the hang is in twl4030_i2c_write_u8, apparently no response comes back from the I2C controller. Sometimes it hangs in omap3_sr_init, again trying to write to the twl4030 to turn on Smartreflex. I checked the schematics, and both the beagle board and Logic's LV SOM use the same pins for i2c1 to talk to the twl4030. 1) Are the git commands I used the proper way to pull out Kevin's PM tree? 2) Does my approch of using Beagle as a starting point for a port to Logic's 35x LV SOM look sane (I already have 2.6.28-rc8 running on the LV som, started from LDP)? 3) Any suggestions on how to figure out why I2C communication with the TWL4030 fails? Any help is appreciated! -- Peter Barada <peterb@xxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
