Commits
Robin Gong committed c321631fd0a
MLK-11619 : ARM: imx: gpc: fix system boot crash on i.mx6sx-sdb board need add pu_reg check for bypass since there is no VDDPU on i.mx6sx, otherwise, below crash happen: Unable to handle kernel NULL pointer dereference at virtual address 00000030 pgd = 80004000 [00000030] *pgd=00000000 Internal error: Oops: 5 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.1.4-00811-g61e6dcd-dirty #519 Hardware name: Freescale i.MX6 SoloX (Device Tree) task: ab068000 ti: ab06c000 task.ti: ab06c000 PC is at regulator_allow_bypass+0x4/0x11c LR is at imx_gpc_probe+0x284/0x310 pc : [<80313ef0>] lr : [<80025a50>] psr: 20000113 sp : ab06de38 ip : 00000001 fp : 00000000 r10: 80a8d42c r9 : 0000010b r8 : ab106010 r7 : fffffdfb r6 : 00000000 r5 : ab106000 r4 : 00000000 r3 : 00000001 r2 : ab06de54 r1 : 00000001 r0 : 00000000 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel Control: 10c5387d Table: 8000404a DAC: 00000015 Process swapper/0 (pid: 1, stack limit = 0xab06c210) Stack: (0xab06de38 to 0xab06e000) de20: 00000000 ab106000 de40: 00000000 fffffdfb ab106010 80025a50 ab103d70 00000001 ab129000 80b5e2fc de60: ab106010 80aa8e84 fffffdfb 00000000 0000010b 80a8d42c 00000000 803677ac de80: 80367768 80b5e2fc ab106010 00000000 80aa8e84 80366040 ab106010 80aa8e84 dea0: ab106044 80aca820 00000000 80366250 00000000 80aa8e84 803661c4 80364584 dec0: ab03695c ab104234 80aa8e84 ab122580 00000000 803657dc 80921954 80aa8e84 dee0: 80aa5720 80aa8e84 80aa5720 ab126fc0 80a44b54 80366854 00000000 80aa5720 df00: 80aa5720 800097d0 ab0b8380 80760508 00000010 00000000 00000000 00000001 df20: 00000000 80aacea8 60000113 00000000 80a37598 809fdb04 abfff947 8004a0b0 df40: 8091bfa4 abfff97f 00000004 00000004 80aace90 80a9952c 80a99534 00000004 df60: 80a8d41c 80b07000 80b07000 80a8d42c 00000000 80a37dac 00000004 00000004 df80: 80a37598 8004e698 00000000 80752480 00000000 00000000 00000000 00000000 dfa0: 00000000 80752488 00000000 8000f628 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 [<80313ef0>] (regulator_allow_bypass) from [<80025a50>] (imx_gpc_probe+0x284/0x310) [<80025a50>] (imx_gpc_probe) from [<803677ac>] (platform_drv_probe+0x44/0xa4) [<803677ac>] (platform_drv_probe) from [<80366040>] (driver_probe_device+0x174/0x2b4) [<80366040>] (driver_probe_device) from [<80366250>] (__driver_attach+0x8c/0x90) [<80366250>] (__driver_attach) from [<80364584>] (bus_for_each_dev+0x6c/0xa0) [<80364584>] (bus_for_each_dev) from [<803657dc>] (bus_add_driver+0x148/0x1f0) [<803657dc>] (bus_add_driver) from [<80366854>] (driver_register+0x78/0xf8) [<80366854>] (driver_register) from [<800097d0>] (do_one_initcall+0x8c/0x1d4) [<800097d0>] (do_one_initcall) from [<80a37dac>] (kernel_init_freeable+0x144/0x1e4) [<80a37dac>] (kernel_init_freeable) from [<80752488>] (kernel_init+0x8/0xe8) [<80752488>] (kernel_init) from [<8000f628>] (ret_from_fork+0x14/0x2c) Code: eb111a0a e1a00005 e8bd80f8 e92d41f0 (e5906030) Signed-off-by: Robin Gong <b38343@freescale.com>