Hi, * Russell King - ARM Linux <[email protected]> [120204 12:03]: > > Another problem oopses the kernel at boot in the voltage domain code, > which I suspect this has never been boot tested on OMAP34xx CPUs: > > omap_vc_init_channel: PMIC info requried to configure vc forvdd_core not > populated.Hence cannot initialize vc > Unable to handle kernel NULL pointer dereference at virtual address 00000000 ... > Backtrace: > [<c03db824>] (omap_vp_init+0x0/0x15c) from [<c03db448>] > (omap_voltage_late_init+ > 0xc4/0xfc) > [<c03db384>] (omap_voltage_late_init+0x0/0xfc) from [<c03d9df8>] > (omap2_common_p > m_late_init+0x14/0x54) > r8:00000000 r7:00000013 r6:c0039988 r5:c03fe004 r4:c03fdfb8 > [<c03d9de4>] (omap2_common_pm_late_init+0x0/0x54) from [<c0008798>] > (do_one_init > call+0x9c/0x164) > [<c00086fc>] (do_one_initcall+0x0/0x164) from [<c03d1284>] > (kernel_init+0x7c/0x1 > 20) > [<c03d1208>] (kernel_init+0x0/0x120) from [<c0039988>] (do_exit+0x0/0x2cc) > r5:c03d1208 r4:00000000 ...
> And OMAP4 doesn't build. Fixing the build error in prm44xx.c (which is > virtually the same as the OMAP3 build error in its prm file) gets us to > a buildable state, but... it silently fails to boot. > > arch/arm/mach-omap2/prm44xx.c:41: error: 'OMAP44XX_IRQ_PRCM' undeclared here > (not in a function) > > At least enabling DEBUG_LL gets this reason: > > <1>Unable to handle kernel NULL pointer dereference at virtual address > 00000000 ... > Backtrace: > > [<c007bab4>] (irq_domain_add+0x0/0x134) from [<c029baac>] > (twl_probe+0xd0/0x370) > r6:c03bef90 r5:00000014 r4:00000170 > > [<c029b9dc>] (twl_probe+0x0/0x370) from [<c01eee70>] > (i2c_device_probe+0xb0/0xe4 > ) > > [<c01eedc0>] (i2c_device_probe+0x0/0xe4) from [<c01d1f34>] > (really_probe+0xa0/0x > 178) > ... Just to verify, it seems that both of these happen because of IRQ_DOMAIN not being set? And that causes twl-core to not get built as drivers/mfd/Kconfig wrongly depends on IRQ_DOMAIN that only gets currently selected with OF.. So I assume the patch you posted at [1] fixes both of the above? Regards, Tony [1] http://marc.info/?l=linuxppc-embedded&m=132839494214427&w=2 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
