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2015-03-30hwmon: (it87) Fix pwm sysfs attribute removalGuenter Roeck
Detection if a pwm channel is supported was wrong on removal, causing the code to try removing non-existing sysfs attributes. That didn't matter much because sysfs attribute removal of non-existing files fails silently, and because the wrong evaluation always returned false, but should nevertheless be fixed. Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2015-03-30drm/i915: Skip allocating shadow batch for 0-length batchesChris Wilson
Since commit 17cabf571e50677d980e9ab2a43c5f11213003ae Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Wed Jan 14 11:20:57 2015 +0000 drm/i915: Trim the command parser allocations we may then try to allocate a zero-sized object and attempt to extract its pages. Understandably this fails. Note that the real offender seems to be commit b9ffd80ed659c559152c042e74741f4f60cac691 Author: Brad Volkin <bradley.d.volkin@intel.com> Date: Thu Dec 11 12:13:10 2014 -0800 drm/i915: Use batch length instead of object size in command parser Testcase: igt/gem_exec_nop #ivb,byt,hsw Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> [cherry picked from commit 743e78c1d726d875b98ff9689cc77c4d3d5d9ae2 from drm-intel-next because 4.0 seems to be affected by this too, despite that the obvious culprit is definitely not in 4.0. Whatever, if fixes a bug. Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
2015-03-30KVM: remove useless check of "ret" variable prior to returning the same valueEugene Korenevsky
A trivial code cleanup. This `if` is redundant. Signed-off-by: Eugene Korenevsky <ekorenevsky@gmail.com> Message-Id: <20150328222717.GA6508@gnote> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-30KVM: x86: Remove redundant definitionsNadav Amit
Some constants are redfined in emulate.c. Avoid it. s/SELECTOR_RPL_MASK/SEGMENT_RPL_MASK s/SELECTOR_TI_MASK/SEGMENT_TI_MASK No functional change. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Message-Id: <1427635984-8113-3-git-send-email-namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-30KVM: x86: removing redundant eflags bits definitionsNadav Amit
The eflags are redefined (using other defines) in emulate.c. Use the definition from processor-flags.h as some mess already started. No functional change. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Message-Id: <1427635984-8113-2-git-send-email-namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-30KVM: x86: BSF and BSR emulation change register unnecassarilyNadav Amit
If the source of BSF and BSR is zero, the destination register should not change. That is how real hardware behaves. If we set the destination even with the same value that we had before, we may clear bits [63:32] unnecassarily. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Message-Id: <1427719163-5429-4-git-send-email-namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-30KVM: x86: POPA emulation may not clear bits [63:32]Nadav Amit
POPA should assign the values to the registers as usual registers are assigned. In other words, 32-bits register assignments should clear bits [63:32] of the register. Split the code of register assignments that will be used by future changes as well. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Message-Id: <1427719163-5429-3-git-send-email-namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-30KVM: x86: CMOV emulation on legacy mode is wrongNadav Amit
On legacy mode CMOV emulation should still clear bits [63:32] even if the assignment is not done. The previous fix 140bad89fd ("KVM: x86: emulation of dword cmov on long-mode should clear [63:32]") was incomplete. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Message-Id: <1427719163-5429-2-git-send-email-namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-30kvm: x86: i8259: return initialized data on invalid-size readPetr Matousek
If data is read from PIC with invalid access size, the return data stays uninitialized even though success is returned. Fix this by always initializing the data. Signed-off-by: Petr Matousek <pmatouse@redhat.com> Reported-by: Nadav Amit <nadav.amit@gmail.com> Message-Id: <20150311111609.GG8544@dhcp-25-225.brq.redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-03-30Merge tag 'kvm_mips_20150327' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/kvm-mips into kvm-next MIPS KVM Guest FPU & SIMD (MSA) Support Add guest FPU and MIPS SIMD Architecture (MSA) support to MIPS KVM, by enabling the host FPU/MSA while in guest mode. This adds two new KVM capabilities, KVM_CAP_MIPS_FPU & KVM_CAP_MIPS_MSA, and supports the 3 FP register modes (FR=0, FR=1, FRE=1), and 128-bit MSA vector registers, with lazy FPU/MSA context save and restore. Some required MIPS FP/MSA fixes are merged in from a branch in the MIPS tree first.
2015-03-30m68k/mac: Fix out-of-bounds array index in OSS IRQ source initializationFinn Thain
Reported-by: David Binderman <dcb314@hotmail.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2015-03-30Merge tag 'iwlwifi-for-kalle-2015-03-30' of ↵Kalle Valo
https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes * fix a memory leak: we leaked memory each time the module was loaded.
2015-03-29spi: Using Trigger number to transmit/receive dataHiep Cao Minh
In order to transmit and receive data when have 32 bytes of data that ready has prepared on Transmit/Receive Buffer to transmit or receive. Instead transmits/receives a byte data using Transmit/Receive Buffer Data Triggering Number will improve the speed of transfer data. Signed-off-by: Hiep Cao Minh <cm-hiep@jinso.co.jp> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-03-29mfd: max77693: Remove unused structuresKrzysztof Kozlowski
The max77693 regulator driver no longer supports board files. Remove the left-overs. Additionally fix name of device in comment. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-03-29regulator: max77693: Let core parse DT and drop board files supportKrzysztof Kozlowski
Simplify the driver by removing board file support and letting regulator core to parse DT. The max77693 regulator driver is used only on Exynos based boards which are DT-only. Board files for Exynos are not supported. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-03-30Merge branch 'drm-fixes-4.0' of git://people.freedesktop.org/~agd5f/linux ↵Dave Airlie
into drm-fixes A few more fixes for 4.0 for radeon. Sorry for the delay, I was a little under the weather this week and time got away from me. * 'drm-fixes-4.0' of git://people.freedesktop.org/~agd5f/linux: drm/radeon: programm the VCE fw BAR as well drm/radeon: always dump the ring content if it's available radeon: Do not directly dereference pointers to BIOS area. drm/radeon/dpm: fix 120hz handling harder
2015-03-29Linux 4.0-rc6v4.0-rc6Linus Torvalds
2015-03-29Merge tag 'armsoc-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Olof Johansson: "The latest and greatest fixes for ARM platform code. Worth pointing out are: - Lines-wise, largest is a PXA fix for dealing with interrupts on DT that was quite broken. It's still newish code so while we could have held this off, it seemed appropriate to include now - Some GPIO fixes for OMAP platforms added a few lines. This was also fixes for code recently added (this release). - Small OMAP timer fix to behave better with partially upstreamed platforms, which is quite welcome. - Allwinner fixes about operating point control, reducing overclocking in some cases for better stability. plus a handful of other smaller fixes across the map" * tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: arm64: juno: Fix misleading name of UART reference clock ARM: dts: sunxi: Remove overclocked/overvoltaged OPP ARM: dts: sun4i: a10-lime: Override and remove 1008MHz OPP setting ARM: socfpga: dts: fix spi1 interrupt ARM: dts: Fix gpio interrupts for dm816x ARM: dts: dra7: remove ti,hwmod property from pcie phy ARM: OMAP: dmtimer: disable pm runtime on remove ARM: OMAP: dmtimer: check for pm_runtime_get_sync() failure ARM: OMAP2+: Fix socbus family info for AM33xx devices ARM: dts: omap3: Add missing dmas for crypto ARM: dts: rockchip: disable gmac by default in rk3288.dtsi MAINTAINERS: add rockchip regexp to the ARM/Rockchip entry ARM: pxa: fix pxa interrupts handling in DT ARM: pxa: Fix typo in zeus.c ARM: sunxi: Have ARCH_SUNXI select RESET_CONTROLLER for clock driver usage
2015-03-29Merge tag 'sunxi-fixes-for-4.0' of ↵Olof Johansson
https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into fixes Allwinner fixes for 4.0 There's a few fixes to merge for 4.0, one to add a select in the machine Kconfig option to fix a potential build failure, and two fixing cpufreq related issues. * tag 'sunxi-fixes-for-4.0' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux: ARM: dts: sunxi: Remove overclocked/overvoltaged OPP ARM: dts: sun4i: a10-lime: Override and remove 1008MHz OPP setting ARM: sunxi: Have ARCH_SUNXI select RESET_CONTROLLER for clock driver usage Signed-off-by: Olof Johansson <olof@lixom.net>
2015-03-29Merge tag 'fixes-v4.0-rc4' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes Fixes for omaps for the -rc cycle: - Fix a device tree based booting vs legacy booting regression for omap3 crypto hardware by adding the missing DMA channels. - Fix /sys/bus/soc/devices/soc0/family for am33xx devices. - Fix two timer issues that can cause hangs if the timer related hwmod data is missing like it often initially is for new SoCs. - Remove pcie hwmods entry from dts as that causes runtime PM to fail for the PHYs. - A paper bag type dts configuration fix for dm816x GPIO interrupts that I just noticed. This is most of the changes diffstat wise, but as it's a basic feature for connecting devices and things work otherwise, it should be fixed. * tag 'fixes-v4.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: dts: Fix gpio interrupts for dm816x ARM: dts: dra7: remove ti,hwmod property from pcie phy ARM: OMAP: dmtimer: disable pm runtime on remove ARM: OMAP: dmtimer: check for pm_runtime_get_sync() failure ARM: OMAP2+: Fix socbus family info for AM33xx devices ARM: dts: omap3: Add missing dmas for crypto Signed-off-by: Olof Johansson <olof@lixom.net>
2015-03-29Merge tag 'socfpga_fix_for_v4.0_2' of ↵Olof Johansson
git://git.rocketboards.org/linux-socfpga-next into fixes Late fix for v4.0 on the SoCFPGA platform: - Fix interrupt number for SPI1 interface * tag 'socfpga_fix_for_v4.0_2' of git://git.rocketboards.org/linux-socfpga-next: ARM: socfpga: dts: fix spi1 interrupt Signed-off-by: Olof Johansson <olof@lixom.net>
2015-03-29arm64: juno: Fix misleading name of UART reference clockDave Martin
The UART reference clock speed is 7273.8 kHz, not 72738 kHz. Dots aren't usually used in node names even though ePAPR permits them. However, this can easily be avoided by expressing the frequency in Hz, not kHz. This patch changes the name to refclk7273800hz, reflecting the actual clock speed. Signed-off-by: Dave Martin <Dave.Martin@arm.com> Acked-by: Liviu Dudau <Liviu.Dudau@arm.com> Signed-off-by: Olof Johansson <olof@lixom.net>
2015-03-29Merge tag 'fixes-for-v4.0-rc5' of https://github.com/rjarzmik/linux into fixesOlof Johansson
arm: pxa: fixes for v4.0-rc5 There are only 2 fixes, one for the zeus board about the regulator changes, where a typo prevented the zeus board from having a working can regulator, and one regression triggered by the interrupts IRQ shift of 16 affecting all boards. * tag 'fixes-for-v4.0-rc5' of https://github.com/rjarzmik/linux: ARM: pxa: fix pxa interrupts handling in DT ARM: pxa: Fix typo in zeus.c Signed-off-by: Olof Johansson <olof@lixom.net>
2015-03-29net: fec: setup right value for mdio hold timeUwe Kleine-König
The FEC modules used on i.MX28 and newer have a register to tune the MDIO output hold time that should be at least 10 ns. Up to now this value was not explicitly set and so resulted in less hold time if the fec clock was faster than 100 MHz. This was noticed on an i.MX28 machine that uses an input clock of ~150 Mhz which resulted in unreliable communication with a Marvell switch. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29net: tcp6: fix double call of tcp_v6_fill_cb()Alexey Kodanev
tcp_v6_fill_cb() will be called twice if socket's state changes from TCP_TIME_WAIT to TCP_LISTEN. That can result in control buffer data corruption because in the second tcp_v6_fill_cb() call it's not copying IP6CB(skb) anymore, but 'seq', 'end_seq', etc., so we can get weird and unpredictable results. Performance loss of up to 1200% has been observed in LTP/vxlan03 test. This can be fixed by copying inet6_skb_parm to the beginning of 'cb' only if xfrm6_policy_check() and tcp_v6_fill_cb() are going to be called again. Fixes: 2dc49d1680b53 ("tcp6: don't move IP6CB before xfrm6_policy_check()") Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29cxgb4vf: Fix sparse warningsHariprasad Shenai
Fixes sparse warnings introduced in commit e85c9a7abfa407ed ("cxgb4/cxgb4vf: Add code to calculate T5 BAR2 Offsets for SGE Queue Registers") and df64e4d38c904dd3 ("cxgb4/cxgb4vf: Use new interfaces to calculate BAR2 SGE Queue Register addresses") and few old ones sparse warnings: >> drivers/net/ethernet/chelsio/cxgb4vf/sge.c:1006:48: sparse: cast removes >> address space of expression >> drivers/net/ethernet/chelsio/cxgb4vf/sge.c:1006:48: sparse: incorrect type in >> initializer (different address space) >> drivers/net/ethernet/chelsio/cxgb4vf/sge.c:1020:40: sparse: incorrect type in >> argument 1 (different base types) Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29irqchip: mips-gic: Add new functions to start/stop the GIC counterMarkos Chandras
We add new functions to start and stop the GIC counter since there are no guarantees the counter will be running after a CPU reset. The GIC counter is stopped by setting the 29th bit on the GIC Config register and it is started by clearing that bit. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Andrew Bresticker <abrestic@chromium.org> Cc: Qais Yousef <qais.yousef@imgtec.com> Cc: <linux-kernel@vger.kernel.org> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Link: https://lkml.kernel.org/r/1427113923-9840-2-git-send-email-markos.chandras@imgtec.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2015-03-29netns: don't clear nsid too early on removalNicolas Dichtel
With the current code, ids are removed too early. Suppose you have an ipip interface that stands in the netns foo and its link part in the netns bar (so the netns bar has an nsid into the netns foo). Now, you remove the netns bar: - the bar nsid into the netns foo is removed - the netns exit method of ipip is called, thus our ipip iface is removed: => a netlink message is sent in the netns foo to advertise this deletion => this netlink message requests an nsid for bar, thus a new nsid is allocated for bar and never removed. We must remove nsids when we are sure that nobody will refer to netns currently cleaned. Fixes: 0c7aecd4bde4 ("netns: add rtnl cmd to add and get peer netns ids") Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29irqchip: tegra: Add Tegra210 supportThierry Reding
Tegra210 uses the same legacy interrupt controller as older generations but it adds a sixth instance. Signed-off-by: Thierry Reding <treding@nvidia.com> Link: https://lkml.kernel.org/r/1427106379-14037-1-git-send-email-thierry.reding@gmail.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2015-03-29Merge branch 'irqchip/urgent-gic' into irqchip/urgentJason Cooper
2015-03-29irqchip: gicv3-its: Use non-cacheable accesses when no shareabilityMarc Zyngier
If the ITS or the redistributors report their shareability as zero, then it is important to make sure they will no generate any cacheable traffic, as this is unlikely to produce the expected result. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Link: https://lkml.kernel.org/r/1427465705-17126-5-git-send-email-marc.zyngier@arm.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2015-03-29irqchip: gicv3-its: Fix PROP/PEND and BASE/CBASE confusionMarc Zyngier
The ITS driver sometime mixes up the use of GICR_PROPBASE bitfields for the GICR_PENDBASE register, and GITS_BASER for GICR_CBASE. This does not lead to any observable bug because similar bits are at the same location, but this just make the code even harder to understand... This patch provides the required #defines and fixes the mixup. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Link: https://lkml.kernel.org/r/1427465705-17126-4-git-send-email-marc.zyngier@arm.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2015-03-29irqchip: gicv3-its: Fix device ID encodingAndre Przywara
When building ITS commands which have the device ID in it, we should mask off the whole upper 32 bits of the first command word before inserting the new value in there. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Link: https://lkml.kernel.org/r/1427465705-17126-3-git-send-email-marc.zyngier@arm.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2015-03-29irqchip: gicv3-its: Fix encoding of collection's target redistributorMarc Zyngier
With a monolithic GICv3, redistributors are addressed using a linear number, while a distributed implementation uses physical addresses. When encoding a target address into a command, we strip the lower 16 bits, as redistributors are always 64kB aligned. This works perfectly well with a distributed implementation, but has the silly effect of always encoding target 0 in the monolithic case (unless you have more than 64k CPUs, of course). The obvious fix is to shift the linear target number by 16 when computing the target address, so that we don't loose any precious bit. Reported-by: Andre Przywara <andre.przywara@arm.com> Tested-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Link: https://lkml.kernel.org/r/1427465705-17126-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2015-03-29Merge branch 'cxgb4'David S. Miller
Hariprasad Shenai says: ==================== cxgb4: Fixes ingress queue mapping and other fixes The below series fixes ingress queue mapping by allocating them dynamically to prevent stack overflow. Disable napi and interrupts before unregistering netdev to avoid crash while unloading driver when traffic is flowing. The patches series is created against 'net' tree. And includes patches on cxgb4 driver. We have included all the maintainers of respective drivers. Kindly review the change and let us know in case of any review comments. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29cxgb4: Disable interrupts and napi before unregistering netdevHariprasad Shenai
Disable interrupts and quiesce rx before unregistering net device to avoid crash while unloading driver when traffic is flowing through. Based on original work by Shameem Khalid <shameem@chelsio.com> Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29cxgb4: Allocate dynamic mem. for egress and ingress queue mapsHariprasad Shenai
QIDs (egress/ingress) from firmware in FW_*_CMD.alloc command can be anywhere in the range from EQ(IQFLINT)_START to EQ(IQFLINT)_END. For eg, in the first load eqid can be from 100 to 300. In the next load it can be from 301 to 500 (assume eq_start is 100 and eq_end is 1000). The driver was assuming them to always start from EQ(IQFLINT)_START till MAX_EGRQ(INGQ). This was causing stack overflow and subsequent crash. Fixed it by dynamically allocating memory (of qsize (x_END - x_START + 1)) for these structures. Based on original work by Santosh Rastapur <santosh@chelsio.com> Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29ipmr,ip6mr: call ip6mr_free_table() on failure pathWANG Cong
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29usbnet: Fix tx_bytes statistic running backward in cdc_ncmBen Hutchings
cdc_ncm disagrees with usbnet about how much framing overhead should be counted in the tx_bytes statistics, and tries 'fix' this by decrementing tx_bytes on the transmit path. But statistics must never be decremented except due to roll-over; this will thoroughly confuse user-space. Also, tx_bytes is only incremented by usbnet in the completion path. Fix this by requiring drivers that set FLAG_MULTI_FRAME to set a tx_bytes delta along with the tx_packets count. Fixes: beeecd42c3b4 ("net: cdc_ncm/cdc_mbim: adding NCM protocol statistics") Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: Bjørn Mork <bjorn@mork.no>
2015-03-29usbnet: Fix tx_packets stat for FLAG_MULTI_FRAME driversBen Hutchings
Currently the usbnet core does not update the tx_packets statistic for drivers with FLAG_MULTI_PACKET and there is no hook in the TX completion path where they could do this. cdc_ncm and dependent drivers are bumping tx_packets stat on the transmit path while asix and sr9800 aren't updating it at all. Add a packet count in struct skb_data so these drivers can fill it in, initialise it to 1 for other drivers, and add the packet count to the tx_packets statistic on completion. Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Tested-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-29spi: bcm2835: fill FIFO before enabling interrupts to reduce interrupts/messageMartin Sperl
To reduce the number of interrupts/message we fill the FIFO before enabling interrupts - for short messages this reduces the interrupt count from 2 to 1 interrupt. There have been rare cases where short (<200ns) chip-select switches with native CS have been observed during such operation, this is why this optimization is only enabled for GPIO-CS. Signed-off-by: Martin Sperl <kernel@martin.sperl.org> Tested-by: Martin Sperl <kernel@martin.sperl.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-03-29spi: bcm2835: fix code formatting issueMartin Sperl
Signed-off-by: Martin Sperl <kernel@martin.sperl.org> Tested-by: Martin Sperl <kernel@martin.sperl.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-03-29Documentation/ABI:iio:fix typoMartin Kepplinger
Signed-off-by: Martin Kepplinger <martink@posteo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-03-29iio: mlx90614: Support devices with dual IR sensorVianney le Clément de Saint-Marcq
The model is detected by reading the EEPROM configuration during probing. Signed-off-by: Vianney le Clément de Saint-Marcq <vianney.leclement@essensium.com> Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-03-29iio: mlx90614: Add symbols for accessible registersVianney le Clément de Saint-Marcq
Add symbols for all accessible RAM and EEPROM registers, as well as the sleep command and timings defined in the datasheet. Signed-off-by: Vianney le Clément de Saint-Marcq <vianney.leclement@essensium.com> Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-03-29iio: bmc150_accel: add support for hardware fifoOctavian Purdila
We only advertise hardware fifo support if the I2C bus supports full I2C or smbus I2C block data reads since it is mandatory to read the full frame in one read (otherwise the rest of the frame is discarded). The hardware fifo is enabled only when triggers are not active because: (a) when using the any-motion trigger the user expects to see samples based on ROC events, but the fifo stores samples based on the sample frequency (b) the data-ready trigger is waking the CPU for for every sample, so using the hardware fifo does not have any benefit Signed-off-by: Octavian Purdila <octavian.purdila@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-03-29iio: add support for hardware fifoOctavian Purdila
Some devices have hardware buffers that can store a number of samples for later consumption. Hardware usually provides interrupts to notify the processor when the FIFO is full or when it has reached a certain watermark level. This helps with reducing the number of interrupts to the host processor and thus it helps decreasing the power consumption. This patch enables usage of hardware FIFOs for IIO devices in conjunction with software device buffers. When the hardware FIFO is enabled the samples are stored in the hardware FIFO. The samples are later flushed to the device software buffer when the number of entries in the hardware FIFO reaches the hardware watermark or when a flush operation is triggered by the user when doing a non-blocking read on an empty software device buffer. In order to implement hardware FIFO support the device drivers must implement the following new operations: setting and getting the hardware FIFO watermark level, flushing the hardware FIFO to the software device buffer. The device must also expose information about the hardware FIFO such it's minimum and maximum watermark and if necessary a list of supported watermark values. Finally, the device driver must activate the hardware FIFO when the device buffer is enabled, if the current device settings allows it. The software device buffer watermark is passed by the IIO core to the device driver as a hint for the hardware FIFO watermark. The device driver can adjust this value to allow for hardware limitations (such as capping it to the maximum hardware watermark or adjust it to a value that is supported by the hardware). It can also disable the hardware watermark (and implicitly the hardware FIFO) it this value is below the minimum hardware watermark. Since a driver may support hardware FIFO only when not in triggered buffer mode (due to different semantics of hardware FIFO sampling and triggered sampling) this patch changes the IIO core code to allow falling back to non-triggered buffered mode if no trigger is enabled. Signed-off-by: Octavian Purdila <octavian.purdila@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-03-29iio: add watermark logic to iio read and pollJosselin Costanzi
Currently the IIO buffer blocking read only wait until at least one data element is available. This patch makes the reader sleep until enough data is collected before returning to userspace. This should limit the read() calls count when trying to get data in batches. Co-author: Yannick Bedhomme <yannick.bedhomme@mobile-devices.fr> Signed-off-by: Josselin Costanzi <josselin.costanzi@mobile-devices.fr> [rebased and remove buffer timeout] Signed-off-by: Octavian Purdila <octavian.purdila@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2015-03-28Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fix from Ingo Molnar: "Fix x86 syscall exit code bug that resulted in spurious non-execution of TIF-driven user-return worklets, causing big trouble for things like KVM that rely on user notifiers for correctness of their vcpu model, causing crashes like double faults" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/asm/entry: Check for syscall exit work with IRQs disabled
2015-03-28Merge branch 'timers-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fixes from Ingo Molnar: "Two clocksource driver fixes, and an idle loop RCU warning fix" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: clocksource/drivers/sun5i: Fix cpufreq interaction with sched_clock() clocksource/drivers: Fix various !CONFIG_HAS_IOMEM build errors timers/tick/broadcast-hrtimer: Fix suspicious RCU usage in idle loop
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