From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Pisati Subject: 3.15+: omap4: mmc: multi_v7: can't boot off mmc Date: Wed, 10 Sep 2014 17:33:16 +0200 Message-ID: <20140910153316.GA12169@luxor.wired.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-omap-owner@vger.kernel.org To: linux-omap Cc: linux-mmc' List-Id: linux-mmc@vger.kernel.org I'm having an hard time making the vanilla v7_defconfig boot off the mmc on my pandaboard: [ 1.698272] omap_hsmmc 4809c000.mmc: unable to get vmmc regulator -517 [ 1.705139] platform 4809c000.mmc: Driver omap_hsmmc requests probe deferral [ 1.712890] omap_hsmmc 480d5000.mmc: unable to get vmmc regulator -517 [ 1.719787] platform 480d5000.mmc: Driver omap_hsmmc requests probe deferral [ 1.727691] sdhci-pltfm: SDHCI platform and OF driver helper [ 1.734619] usbcore: registered new interface driver usbhid [ 1.740478] usbhid: USB HID core driver [ 1.749359] TCP: cubic registered [ 1.752838] NET: Registered protocol family 17 [ 1.757690] Key type dns_resolver registered [ 1.762756] Power Management for TI OMAP4+ devices. [ 1.767883] Power Management for TI OMAP4. [ 1.772186] OMAP4 PM: u-boot >= v2012.07 is required for full PM support [ 1.779296] ThumbEE CPU extension supported. [ 1.779296] Registering SWP/SWPB emulation handler [ 1.790008] vwl1271: 1800 mV [ 1.794952] Skipping twl internal clock init and using bootloader value (unknown osc rate) [ 1.805358] twl 0-0048: PIH (irq 39) nested IRQs [ 1.811340] twl_rtc rtc.14: Power up reset detected. [ 1.817260] twl_rtc rtc.14: Enabling TWL-RTC [ 1.824249] twl_rtc rtc.14: rtc core: registered rtc.14 as rtc0 [ 1.831451] VAUX1_6030: 1000 <--> 3000 mV at 1800 mV [ 1.837677] VAUX2_6030: 1200 <--> 2800 mV at 1800 mV [ 1.844024] VAUX3_6030: 1000 <--> 3000 mV at 1200 mV [ 1.850311] VMMC: 1200 <--> 3000 mV at 3000 mV [ 1.855957] VPP: 1800 <--> 2500 mV at 1900 mV [ 1.861572] VUSIM: 1200 <--> 2900 mV at 1800 mV [ 1.866577] VDAC: 1800 mV [ 1.869964] VANA: 2100 mV [ 1.874114] VCXIO: 1800 mV [ 1.877624] VUSB: 3300 mV [ 1.881317] V1V8: 1800 mV [ 1.884979] V2V1: 2100 mV [ 1.967407] usb 1-1: new high-speed USB device number 2 using ehci-omap [ 2.094512] omap_i2c 48070000.i2c: bus 0 rev0.10 at 400 kHz [ 2.104583] omap_i2c 48072000.i2c: bus 1 rev0.10 at 400 kHz [ 2.114044] omap_i2c 48060000.i2c: bus 2 rev0.10 at 100 kHz [ 2.121582] hub 1-1:1.0: USB hub found [ 2.125854] hub 1-1:1.0: 5 ports detected [ 2.131744] omap_i2c 48350000.i2c: bus 3 rev0.10 at 400 kHz [ 2.140686] omap_hsmmc 4809c000.mmc: pins are not configured from the driver [ 2.321166] twl_rtc rtc.14: setting system clock to 2000-01-01 00:00:00 UTC (946684800) [ 2.336578] ALSA device list: [ 2.339782] No soundcards found. [ 2.339782] VFS: Cannot open root device "mmcblk0p2" or unknown-block(0,0): error -6 [ 2.352478] Please append a correct "root=" boot option; here are the available partitions: [ 2.361297] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 2.367980] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.14.0-12143-g552e691 #70 [ 2.377716] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 2.385864] [] (show_stack) from [] (dump_stack+0x88/0x98) [ 2.390289] [] (dump_stack) from [] (panic+0xa0/0x208) [ 2.400695] [] (panic) from [] (mount_block_root+0x1a0/0x230) [ 2.408569] [] (mount_block_root) from [] (mount_root+0x108/0x110) [ 2.408569] [] (mount_root) from [] (prepare_namespace+0x158/0x1a0) [ 2.425292] [] (prepare_namespace) from [] (kernel_init_freeable+0x1cc/0x1dc) [ 2.430084] [] (kernel_init_freeable) from [] (kernel_init+0x8/0xf0) [ 2.443145] [] (kernel_init) from [] (ret_from_fork+0x14/0x3c) [ 2.447967] CPU0: stopping [ 2.451110] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.14.0-12143-g552e691 #70 [ 2.451110] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 2.451110] [] (show_stack) from [] (dump_stack+0x88/0x98) [ 2.451110] [] (dump_stack) from [] (handle_IPI+0x148/0x174) [ 2.477386] [] (handle_IPI) from [] (gic_handle_irq+0x58/0x5c) [ 2.477386] [] (gic_handle_irq) from [] (__irq_svc+0x40/0x50) [ 2.477386] Exception stack(0xc0b6def0 to 0xc0b6df38) [ 2.506256] dee0: 00000000 c0b7bf54 c0b7bf54 0000004c [ 2.506256] df00: 91be7a33 00000000 92080d44 00000000 eaf94de8 c0c8f2bc 00000000 ea4bdd94 [ 2.523437] df20: 00000010 c0b6df38 c06bcbf8 c06bcc04 60000153 ffffffff [ 2.523437] [] (__irq_svc) from [] (cpuidle_enter_state+0x68/0xf8) [ 2.523437] [] (cpuidle_enter_state) from [] (cpuidle_enter_state_coupled+0x130/0x378) [ 2.523437] [] (cpuidle_enter_state_coupled) from [] (cpu_startup_entry+0x200/0x230) [ 2.558868] [] (cpu_startup_entry) from [] (start_kernel+0x348/0x354) [ 2.567474] [] (start_kernel) from [<80208074>] (0x80208074) [ 2.567474] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) i tracked it down to the "PBIAS on DT" merge in 3.15-rc1: commit 97e18dc007546fce8e99098480b921a02ebb3037 Merge: 042f7b7 c674801 Author: Linus Torvalds Date: Wed Apr 9 08:39:39 2014 -0700 Merge tag 'mmc-updates-for-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc in particular those commits: mmc: omap_hsmmc: remove pbias workaround ARM: OMAP: enable SYSCON and REGULATOR_PBIAS in omap2plus_defconfig ARM: dts: add pbias dt node mmc: omap_hsmmc: adapt hsmmc to use pbias regulator regulator: add pbias regulator support but i've turned on REGULATOR_PBIAS in my config and i still can't boot multi_v7 off mmc on my pandas, any idea what could it be? -- bye, p.