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Date: Wed, 27 Aug 2014 11:15:04 -0500 From: atull <atull@...nsource.altera.com> To: Weike Chen <alvin.chen@...el.com> CC: Linus Walleij <linus.walleij@...aro.org>, Alexandre Courbot <gnurou@...il.com>, Grant Likely <grant.likely@...aro.org>, Rob Herring <robh+dt@...nel.org>, <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>, Boon Leong Ong <boon.leong.ong@...el.com>, Andriy Shevchenko <andriy.shevchenko@...el.com>, Mika Westerberg <mika.westerberg@...el.com>, Hock Leong Kweh <hock.leong.kweh@...el.com>, Darren Hart <dvhart@...ux.intel.com>, <yvanderv@...nsource.altera.com>, <dinguyen@...nsource.altera.com> Subject: Re: [PATCH 3/3] GPIO: gpio-dwapb: Suspend & Resume PM enabling On Wed, 27 Aug 2014, Weike Chen wrote: > This patch enables suspend and resume mode for the power management, and > it is based on Josef Ahmad's previous work. > > Reviewed-by: Hock Leong Kweh <hock.leong.kweh@...el.com> > Reviewed-by: Shevchenko, Andriy <andriy.shevchenko@...el.com> > Signed-off-by: Weike Chen <alvin.chen@...el.com> > --- > drivers/gpio/gpio-dwapb.c | 67 +++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 67 insertions(+) > Hi Weike, I tried out these patches on the current master branch (v3.17-rc2-9-g68e3702) with a socfpga cyclone5 board. If I apply all 3 patches, the kernel doesn't boot. If I rebuild with only the first patch, I get only one gpio block showing up (should have 3 for this board) and these messages: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at /home/atull/repos/linux-socfpga/fs/sysfs/dir.c:31 sysfs_warn_dup+0x58/0x74() sysfs: cannot create duplicate filename '/class/gpio/gpiochip0' Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.17.0-rc2-00012-g7ad6a41 #1 [<c0014ab4>] (unwind_backtrace) from [<c0011684>] (show_stack+0x10/0x14) [<c0011684>] (show_stack) from [<c03d3d80>] (dump_stack+0x74/0x90) [<c03d3d80>] (dump_stack) from [<c0020c88>] (warn_slowpath_common+0x68/0x8c) [<c0020c88>] (warn_slowpath_common) from [<c0020d40>] (warn_slowpath_fmt+0x30/0x40) [<c0020d40>] (warn_slowpath_fmt) from [<c0144e5c>] (sysfs_warn_dup+0x58/0x74) [<c0144e5c>] (sysfs_warn_dup) from [<c0145180>] (sysfs_do_create_link_sd+0xbc/0xc4) [<c0145180>] (sysfs_do_create_link_sd) from [<c02357f4>] (device_add+0x304/0x4ec) [<c02357f4>] (device_add) from [<c0235a78>] (device_create_groups_vargs+0x9c/0xcc) [<c0235a78>] (device_create_groups_vargs) from [<c0235af4>] (device_create_vargs+0x20/0x28) [<c0235af4>] (device_create_vargs) from [<c0235b1c>] (device_create+0x20/0x28) [<c0235b1c>] (device_create) from [<c020be4c>] (gpiochip_export+0x4c/0x98) [<c020be4c>] (gpiochip_export) from [<c020a408>] (gpiochip_add+0x114/0x29c) [<c020a408>] (gpiochip_add) from [<c020c818>] (dwapb_gpio_probe+0x16c/0x634) [<c020c818>] (dwapb_gpio_probe) from [<c0239198>] (platform_drv_probe+0x2c/0x5c) [<c0239198>] (platform_drv_probe) from [<c0237bd4>] (driver_probe_device+0x78/0x208) [<c0237bd4>] (driver_probe_device) from [<c0237df0>] (__driver_attach+0x8c/0x90) [<c0237df0>] (__driver_attach) from [<c02364b8>] (bus_for_each_dev+0x54/0x88) [<c02364b8>] (bus_for_each_dev) from [<c023748c>] (bus_add_driver+0xd8/0x1d4) [<c023748c>] (bus_add_driver) from [<c0238564>] (driver_register+0x78/0xf4) [<c0238564>] (driver_register) from [<c0008884>] (do_one_initcall+0x80/0x1b8) [<c0008884>] (do_one_initcall) from [<c052fcd4>] (kernel_init_freeable+0x170/0x240) [<c052fcd4>] (kernel_init_freeable) from [<c03d0238>] (kernel_init+0x8/0xec) [<c03d0238>] (kernel_init) from [<c000e578>] (ret_from_fork+0x14/0x3c) ---[ end trace 209e273f37ff62dd ]--- gpiochip_add: GPIOs 0..28 (ff709000.gpio) failed to register gpio-dwapb ff709000.gpio: failed to register gpiochip for /soc/gpio@...09000/gpio-controller@0 gpio-dwapb: probe of ff709000.gpio failed with error -17 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at /home/atull/repos/linux-socfpga/fs/sysfs/dir.c:31 sysfs_warn_dup+0x58/0x74() sysfs: cannot create duplicate filename '/class/gpio/gpiochip0' Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 3.17.0-rc2-00012-g7ad6a41 #1 [<c0014ab4>] (unwind_backtrace) from [<c0011684>] (show_stack+0x10/0x14) [<c0011684>] (show_stack) from [<c03d3d80>] (dump_stack+0x74/0x90) [<c03d3d80>] (dump_stack) from [<c0020c88>] (warn_slowpath_common+0x68/0x8c) [<c0020c88>] (warn_slowpath_common) from [<c0020d40>] (warn_slowpath_fmt+0x30/0x40) [<c0020d40>] (warn_slowpath_fmt) from [<c0144e5c>] (sysfs_warn_dup+0x58/0x74) [<c0144e5c>] (sysfs_warn_dup) from [<c0145180>] (sysfs_do_create_link_sd+0xbc/0xc4) [<c0145180>] (sysfs_do_create_link_sd) from [<c02357f4>] (device_add+0x304/0x4ec) [<c02357f4>] (device_add) from [<c0235a78>] (device_create_groups_vargs+0x9c/0xcc) [<c0235a78>] (device_create_groups_vargs) from [<c0235af4>] (device_create_vargs+0x20/0x28) [<c0235af4>] (device_create_vargs) from [<c0235b1c>] (device_create+0x20/0x28) [<c0235b1c>] (device_create) from [<c020be4c>] (gpiochip_export+0x4c/0x98) [<c020be4c>] (gpiochip_export) from [<c020a408>] (gpiochip_add+0x114/0x29c) [<c020a408>] (gpiochip_add) from [<c020c818>] (dwapb_gpio_probe+0x16c/0x634) [<c020c818>] (dwapb_gpio_probe) from [<c0239198>] (platform_drv_probe+0x2c/0x5c) [<c0239198>] (platform_drv_probe) from [<c0237bd4>] (driver_probe_device+0x78/0x208) [<c0237bd4>] (driver_probe_device) from [<c0237df0>] (__driver_attach+0x8c/0x90) [<c0237df0>] (__driver_attach) from [<c02364b8>] (bus_for_each_dev+0x54/0x88) [<c02364b8>] (bus_for_each_dev) from [<c023748c>] (bus_add_driver+0xd8/0x1d4) [<c023748c>] (bus_add_driver) from [<c0238564>] (driver_register+0x78/0xf4) [<c0238564>] (driver_register) from [<c0008884>] (do_one_initcall+0x80/0x1b8) [<c0008884>] (do_one_initcall) from [<c052fcd4>] (kernel_init_freeable+0x170/0x240) [<c052fcd4>] (kernel_init_freeable) from [<c03d0238>] (kernel_init+0x8/0xec) [<c03d0238>] (kernel_init) from [<c000e578>] (ret_from_fork+0x14/0x3c) ---[ end trace 209e273f37ff62de ]--- gpiochip_add: GPIOs 0..26 (ff70a000.gpio) failed to register gpio-dwapb ff70a000.gpio: failed to register gpiochip for /soc/gpio@...0a000/gpio-controller@0 gpio-dwapb: probe of ff70a000.gpio failed with error -17 How are you testing this? Alan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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