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2016-12-24Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds1-1/+1
This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-18i2c: mux: mlxcpld: fix i2c mux selection cachingPeter Rosin1-11/+13
smbus functions return -ve on error, 0 on success. However, __i2c_transfer() have a different return signature - -ve on error, or number of buffers transferred (which may be zero or greater). The upshot of this is that the sense of the test is reversed when using the mux on a bus supporting the master_xfer method: we cache the value and never retry if we fail to transfer any buffers, but if we succeed, we clear the cached value. Fix this by making mlxcpld_mux_reg_write() return a -ve error code for all failure cases, just as was done in commit 7f638c1cb0a1 ("i2c: mux: pca954x: fix i2c mux selection caching"). This also aligns the implementations of these two muxes in this area. Signed-off-by: Peter Rosin <peda@axentia.se> Acked-by: Vadim Pasternak <vadimp@mellanox.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-17i2c: designware: fix wrong Tx/Rx FIFO for ACPITin Huynh1-7/+24
ACPI always sets Tx/Rx FIFO to 32. This configuration will cause problem if the IP core supports a FIFO size of less than 32. The driver should read the FIFO size from the IP and select the smaller one of the two. Signed-off-by: Tin Huynh <tnhuynh@apm.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-17i2c: xgene: Fix missing code of DTB supportTin Huynh1-0/+1
In DTB case, i2c-core doesn't create slave device which is installed on i2c-xgene bus because of missing code in this driver. This patch fixes this issue. Signed-off-by: Tin Huynh <tnhuynh@apm.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-17i2c: mux: pca954x: fix i2c mux selection cachingRussell King1-1/+4
smbus functions return -ve on error, 0 on success. However, __i2c_transfer() have a different return signature - -ve on error, or number of buffers transferred (which may be zero or greater.) The upshot of this is that the sense of the test is reversed when using the mux on a bus supporting the master_xfer method: we cache the value and never retry if we fail to transfer any buffers, but if we succeed, we clear the cached value. Fix this by making pca954x_reg_write() return a negative error code for all failure cases. Fixes: 463e8f845cbf ("i2c: mux: pca954x: retry updating the mux selection on failure") Acked-by: Peter Rosin <peda@axentia.se> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-17i2c: octeon: thunderx: Limit register access retriesJan Glauber2-6/+19
Do not infinitely retry register readq and writeq operations in order to not lock up the CPU in case the TWSI gets stuck. Return -EIO in case of a failed data read. For all other cases just return so subsequent operations will fail and trigger the recovery. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-15Merge tag 'trace-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-traceLinus Torvalds1-1/+2
Pull tracing updates from Steven Rostedt: "This release has a few updates: - STM can hook into the function tracer - Function filtering now supports more advance glob matching - Ftrace selftests updates and added tests - Softirq tag in traces now show only softirqs - ARM nop added to non traced locations at compile time - New trace_marker_raw file that allows for binary input - Optimizations to the ring buffer - Removal of kmap in trace_marker - Wakeup and irqsoff tracers now adhere to the set_graph_notrace file - Other various fixes and clean ups" * tag 'trace-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (42 commits) selftests: ftrace: Shift down default message verbosity kprobes/trace: Fix kprobe selftest for newer gcc tracing/kprobes: Add a helper method to return number of probe hits tracing/rb: Init the CPU mask on allocation tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results tracing/fgraph: Have wakeup and irqsoff tracers ignore graph functions too fgraph: Handle a case where a tracer ignores set_graph_notrace tracing: Replace kmap with copy_from_user() in trace_marker writing ftrace/x86_32: Set ftrace_stub to weak to prevent gcc from using short jumps to it tracing: Allow benchmark to be enabled at early_initcall() tracing: Have system enable return error if one of the events fail tracing: Do not start benchmark on boot up tracing: Have the reg function allow to fail ring-buffer: Force rb_end_commit() and rb_set_commit_to_write() inline ring-buffer: Froce rb_update_write_stamp() to be inlined ring-buffer: Force inline of hotpath helper functions tracing: Make __buffer_unlock_commit() always_inline tracing: Make tracepoint_printk a static_key ring-buffer: Always inline rb_event_data() ring-buffer: Make rb_reserve_next_event() always inlined ...
2016-12-15Merge branch 'i2c/for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linuxLinus Torvalds31-379/+2066
Pull i2c updates from Wolfram Sang: - the first series of making i2c_device_id optional instead of mandatory (in favor of alternatives like of_device_id). This involves adding a new probe callback (probe_new) which removes some peculiarities I2C had for a long time now. The new probe is matching the other subsystems now and the old one will be removed once all users are converted. It is expected to take a while but there is ongoing interest in that. - SMBus Host Notify introduced 4.9 got refactored. They are now using interrupts instead of the alert callback which solves multiple issues. - new drivers for iMX LowPower I2C, Mellanox CPLD and its I2C mux - significant refactoring for bcm2835 driver - the usual set of driver updates and improvements * 'i2c/for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (46 commits) i2c: fsl-lpi2c: read lpi2c fifo size in probe() i2c: octeon: thunderx: Remove double-check after interrupt i2c: octeon: thunderx: TWSI software reset in recovery i2c: cadence: Allow Cadence I2C to be selected for Cadence Xtensa CPUs i2c: sh_mobile: Add per-Generation fallback bindings i2c: rcar: Add per-Generation fallback bindings i2c: imx-lpi2c: add low power i2c bus driver dt-bindings: i2c: imx-lpi2c: add devicetree bindings i2c: designware-pcidrv: Add 10bit address feature to medfield/merrifield i2c: pxa: Add support for the I2C units found in Armada 3700 i2c: pxa: Add definition of fast and high speed modes via the regs layout dt-bindings: i2c: pxa: Update the documentation for the Armada 3700 i2c: qup: support SMBus block read i2c: qup: add ACPI support i2c: designware: Consolidate default functionality bits i2c: i2c-mux-gpio: update mux with gpiod_set_array_value_cansleep i2c: mux: pca954x: Add ACPI support for pca954x i2c: use an IRQ to report Host Notify events, not alert i2c: i801: remove SMBNTFDDAT reads as they always seem to return 0 i2c: i801: use the BIT() macro for FEATURES_* also ...
2016-12-11i2c: fsl-lpi2c: read lpi2c fifo size in probe()Gao Pan1-9/+15
The lpi2c fifo size is a read only parameter resides Parameter Register. It's better to read lpi2c tx/rx fifo size in probe() other than just define a macro for it. Signed-off-by: Gao Pan <pandy.gao@nxp.com> Reviewed-by: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-11i2c: octeon: thunderx: Remove double-check after interruptJan Glauber1-41/+2
Commit 1bb1ff3e7c74 ("i2c: octeon: Improve performance if interrupt is early") added a double-check around the wait_event_timeout() condition. The performance problem that this commit tried to work-around could not be reproduced. It also makes the wait condition more complicated then it should be. Therefore remove the double-check. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-11i2c: octeon: thunderx: TWSI software reset in recoveryJan Glauber1-0/+3
I've seen i2c recovery reporting long loops of: [ 1035.887818] i2c i2c-4: SCL is stuck low, exit recovery [ 1037.999748] i2c i2c-4: SCL is stuck low, exit recovery [ 1040.111694] i2c i2c-4: SCL is stuck low, exit recovery ... Add a TWSI software reset which clears the status and STA,STP,IFLG in SW_TWSI_EOP_TWSI_CTL. With this the recovery works fine and above message is not seen. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-11i2c: cadence: Allow Cadence I2C to be selected for Cadence Xtensa CPUsJan Kotas1-1/+1
This patch allows Cadence I2C controller to be selected in systems using Cadence Xtensa processors. Signed-off-by: Jan Kotas <jank@cadence.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-11i2c: sh_mobile: Add per-Generation fallback bindingsSimon Horman1-1/+3
Add per-Generation fallback bindings for R-Car SoCs. This is in keeping with the compatibility string scheme is being adopted for drivers for Renesas SoCs. Also, improve readability by listing the rmobile fallback compatibility string after the more-specific compatibility strings they provide a fallback for. Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-11i2c: rcar: Add per-Generation fallback bindingsSimon Horman1-1/+4
In the case of Renesas R-Car hardware we know that there are generations of SoCs, e.g. Gen 2 and Gen 3. But beyond that it's not clear what the relationship between IP blocks might be. For example, I believe that r8a7790 is older than r8a7791 but that doesn't imply that the latter is a descendant of the former or vice versa. We can, however, by examining the documentation and behaviour of the hardware at run-time observe that the current driver implementation appears to be compatible with the IP blocks on SoCs within a given generation. For the above reasons and convenience when enabling new SoCs a per-generation fallback compatibility string scheme is being adopted for drivers for Renesas SoCs. Also: * Deprecate renesas,i2c-rcar. It seems poorly named as it is only compatible with R-Car Gen 1. It also appears unused in mainline. * Add some text to describe per-SoC bindings Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-09tracing: Have the reg function allow to failSteven Rostedt (Red Hat)1-1/+2
Some tracepoints have a registration function that gets enabled when the tracepoint is enabled. There may be cases that the registraction function must fail (for example, can't allocate enough memory). In this case, the tracepoint should also fail to register, otherwise the user would not know why the tracepoint is not working. Cc: David Howells <dhowells@redhat.com> Cc: Seiji Aguchi <seiji.aguchi@hds.com> Cc: Anton Blanchard <anton@samba.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-12-01i2c: imx-lpi2c: add low power i2c bus driverGao Pan3-0/+657
This patch adds lpi2c bus driver to support new i.MX products which use lpi2c instead of the old imx i2c. The lpi2c can continue operating in stop mode when an appropriate clock is available. It is also designed for low CPU overhead with DMA offloading of FIFO register accesses. Signed-off-by: Gao Pan <pandy.gao@nxp.com> Reviewed-by: Fugang Duan <B38611@freescale.com> Reviewed-by: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-01i2c: designware-pcidrv: Add 10bit address feature to medfield/merrifieldAlexander Stein1-0/+2
Both Merrifield TRM and Medfield TRM state: "Both 7-bit and 10-bit addressing modes are supported." Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-01i2c: pxa: Add support for the I2C units found in Armada 3700Romain Perier2-1/+16
The Armada 3700 has two I2C controllers that is compliant with the I2C Bus Specificiation 2.1, supports multi-master and different bus speed: Standard mode (up to 100 KHz), Fast mode (up to 400 KHz), High speed mode (up to 3.4 Mhz). This IP block has a lot of similarity with the PXA, except some register offsets and bitfield. This commits adds a basic support for this I2C unit. Signed-off-by: Romain Perier <romain.perier@free-electrons.com> Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-12-01i2c: pxa: Add definition of fast and high speed modes via the regs layoutRomain Perier1-2/+9
So far, the bit masks for the fast and high speed mode were statically defined. Some IP blocks might use different bits for these modes. This commit introduces new fields in order to enable the definition of different bit masks for these features. If these fields are undefined, ICR_FM and ICR_HS are selected to preserve backward compatibility with other IPs. Signed-off-by: Romain Perier <romain.perier@free-electrons.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-29i2c: qup: support SMBus block readNaveen Kaje1-3/+61
I2C QUP driver relies on SMBus emulation support from the framework. To handle SMBus block reads, the driver should check I2C_M_RECV_LEN flag and should read the first byte received as the message length. The driver configures the QUP hardware to read one byte. Once the message length is known from this byte, the QUP hardware is configured to read the rest. Signed-off-by: Naveen Kaje <nkaje@codeaurora.org> Signed-off-by: Austin Christ <austinwc@codeaurora.org> Reviewed-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-29i2c: qup: add ACPI supportNaveen Kaje1-16/+42
Add support to get the device parameters from ACPI. Assume that the clocks are managed by firmware. Signed-off-by: Naveen Kaje <nkaje@codeaurora.org> Signed-off-by: Austin Christ <austinwc@codeaurora.org> Reviewed-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-29i2c: designware: Consolidate default functionality bitsAlexander Stein3-16/+10
Use a common place for default functionality bits for both platform and pci driver. Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-29i2c: i2c-mux-gpio: update mux with gpiod_set_array_value_cansleepPeter Rosin1-4/+14
If the gpio controller supports it and the gpio lines are concentrated to one gpio chip, the mux controller pins will get updated simultaneously. Signed-off-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-29i2c: mux: pca954x: Add ACPI support for pca954xtnhuynh@apm.com1-1/+27
This patch enables ACPI support for mux-pca954x driver. Signed-off-by: Tin Huynh <tnhuynh@apm.com> Acked-by: Peter Rosin <peda@axentia.se> [wsa: removed a trailing whitespace] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-29Revert "i2c: octeon: thunderx: Limit register access retries"Jan Glauber2-19/+12
This reverts commit 70121f7f3725 ("i2c: octeon: thunderx: Limit register access retries"). Using readq_poll_timeout instead of __raw_readq triggers the following debug warning: [ 78.871568] ipmi_ssif: Trying hotmod-specified SSIF interface at i2c address 0x12, adapter Cavium ThunderX i2c adapter at 0000:01:09.4, slave address 0x0 [ 78.886107] do not call blocking ops when !TASK_RUNNING; state=2 set at [<fffffc00080e0088>] prepare_to_wait_event+0x58/0x10c [ 78.897436] ------------[ cut here ]------------ [ 78.902050] WARNING: CPU: 6 PID: 2235 at kernel/sched/core.c:7718 __might_sleep+0x80/0x88 [...] [ 79.133553] [<fffffc00080c3aac>] __might_sleep+0x80/0x88 [ 79.138862] [<fffffc0000e30138>] octeon_i2c_test_iflg+0x4c/0xbc [i2c_thunderx] [ 79.146077] [<fffffc0000e30958>] octeon_i2c_test_ready+0x18/0x70 [i2c_thunderx] [ 79.153379] [<fffffc0000e30b04>] octeon_i2c_wait+0x154/0x1a4 [i2c_thunderx] [ 79.160334] [<fffffc0000e310bc>] octeon_i2c_xfer+0xf4/0xf60 [i2c_thunderx] Signed-off-by: Jan Glauber <jglauber@cavium.com> Acked-by: Steven J. Hill <steven.hill@cavium.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-25Revert "i2c: designware: do not disable adapter after transfer"Jarkko Nikula1-37/+18
This reverts commit 0317e6c0f1dc1ba86b8d9dccc010c5e77b8355fa. Srinivas reported recently touchscreen and touchpad stopped working in Haswell based machine in Linux 4.9-rc series with timeout errors from i2c_designware: [ 16.508013] i2c_designware INT33C3:00: controller timed out [ 16.508302] i2c_hid i2c-MSFT0001:02: failed to change power setting. [ 17.532016] i2c_designware INT33C3:00: controller timed out [ 18.556022] i2c_designware INT33C3:00: controller timed out [ 18.556315] i2c_hid i2c-ATML1000:00: failed to retrieve report from device. I managed to reproduce similar errors on another Haswell based machine where touchscreen initialization fails maybe in every 1/5 - 1/2 boots. Since root cause for these errors is not clear yet and debugging is ongoing it's better to revert this commit as we are near to release. Reported-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-24i2c: use an IRQ to report Host Notify events, not alertBenjamin Tissoires4-127/+121
The current SMBus Host Notify implementation relies on .alert() to relay its notifications. However, the use cases where SMBus Host Notify is needed currently is to signal data ready on touchpads. This is closer to an IRQ than a custom API through .alert(). Given that the 2 touchpad manufacturers (Synaptics and Elan) that use SMBus Host Notify don't put any data in the SMBus payload, the concept actually matches one to one. Benefits are multiple: - simpler code and API: the client will just have an IRQ, and nothing needs to be added in the adapter beside internally enabling it. - no more specific workqueue, the threading is handled by IRQ core directly (when required) - no more races when removing the device (the drivers are already required to disable irq on remove) - simpler handling for drivers: use plain regular IRQs - no more dependency on i2c-smbus for i2c-i801 (and any other adapter) - the IRQ domain is created automatically when the adapter exports the Host Notify capability - the IRQ are assign only if ACPI, OF and the caller did not assign one already - the domain is automatically destroyed on remove - fewer lines of code (minus 20, yeah!) Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-24i2c: i801: remove SMBNTFDDAT reads as they always seem to return 0Benjamin Tissoires1-4/+6
On the platform tested, reading SMBNTFDDAT always returns 0 (using 1 read of a word or 2 of 2 bytes). Given that we are not sure why and that we don't need to rely on the data parameter in the current users of Host Notify, remove this part of the code. If someone wants to re-enable it, just revert this commit and data should be available. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-24i2c: i801: use the BIT() macro for FEATURES_* alsoBenjamin Tissoires1-8/+8
no functional changes Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-24i2c: i801: use BIT() macro for bits definitionBenjamin Tissoires1-26/+26
i801 mixes hexadecimal and decimal values for defining bits. However, we have a nice BIT() macro for this exact purpose. No functional changes, cleanup only. Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-24i2c: i801: minor formatting issuesBenjamin Tissoires1-4/+2
No functional changes, just typos and remove unused #define. Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-24i2c: i801: store and restore the SLVCMD register at load and unloadBenjamin Tissoires1-1/+16
Also do not override any other configuration in this register. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-24i2c: mlxcpld: add master driver for mellanox systemsVadim Pasternak3-0/+516
Device driver for Mellanox I2C controller logic, implemented in Lattice CPLD device. Device supports: - Master mode - One physical bus - Polling mode The Kconfig currently controlling compilation of this code is: drivers/i2c/busses/Kconfig:config I2C_MLXCPLD Signed-off-by: Michael Shych <michaelsh@mellanox.com> Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-24i2c: designware: fix rx fifo depth trackingRussell King1-1/+1
When loading the TX fifo to receive bytes on the I2C bus, we incorrectly count the number of bytes: rx_limit = dev->rx_fifo_depth - dw_readl(dev, DW_IC_RXFLR); while (buf_len > 0 && tx_limit > 0 && rx_limit > 0) { if (rx_limit - dev->rx_outstanding <= 0) break; rx_limit--; dev->rx_outstanding++; } DW_IC_RXFLR indicates how many bytes are available to be read in the FIFO, dev->rx_fifo_depth is the FIFO size, and dev->rx_outstanding is the number of bytes that we've requested to be read so far, but which have not been read. Firstly, increasing dev->rx_outstanding and decreasing rx_limit and then comparing them results in each byte consuming "two" bytes in this tracking, so this is obviously wrong. Secondly, the number of bytes that _could_ be received into the FIFO at any time is the number of bytes we have so far requested but not yet read from the FIFO - in other words dev->rx_outstanding. So, in order to request enough bytes to fill the RX FIFO, we need to request dev->rx_fifo_depth - dev->rx_outstanding bytes. Modifying the code thusly results in us reaching the maximum number of bytes outstanding each time we queue more "receive" operations, provided the transfer allows that to happen. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-24i2c: designware: report short transfersRussell King1-1/+6
Rather than reporting success for a short transfer due to interrupt latency, report an error both to the caller, as well as to the kernel log. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-19i2c: i2c-mux-pca954x: fix deselect enabling for device-treeAlex Hemme1-2/+2
Deselect functionality can be ignored for device-trees with "i2c-mux-idle-disconnect" entries if no platform_data is available. By enabling the deselect functionality outside the platform_data block the logic works as it did in previous kernels. Fixes: 7fcac9807175 ("i2c: i2c-mux-pca954x: convert to use an explicit i2c mux core") Cc: <stable@vger.kernel.org> # v4.7+ Signed-off-by: Alex Hemme <ahemme@cisco.com> Signed-off-by: Ziyang Wu <ziywu@cisco.com> [touched up a few minor issues /peda] Signed-off-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-18i2c: xlp9xx: ACPI support for I2C clientsTanmay Jagdale1-0/+1
The ACPI companion of the adapter has to be set for I2C controller code to read and attach the slave devices described in the ACPI table with the I2CSerialBus resource descriptor. Used ACPI_COMPANION_SET macro to set this. Signed-off-by: Tanmay Jagdale <tanmay.jagdale@broadcom.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-18i2c: uniphier-f: rename jump label to follow coding style guidelineMasahiro Yamada1-3/+3
Documentation/CodingStyle recommends to use label names which say what the goto does or why the goto exists. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-18i2c: uniphier: rename jump label to follow coding style guidelineMasahiro Yamada1-3/+3
Documentation/CodingStyle recommends to use label names which say what the goto does or why the goto exists. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-18i2c: designware: Allow reduce bus speed by "clock-frequency" propertyJarkko Nikula1-5/+10
Allow more flexibility to bus speed selection. Now if there are I2C slave connections defined in ACPI the speed of slowest device on the bus will define the bus speed. However if also "clock-frequency" device property is defined we should use the slowest of these two. This is targeted to maker boards where developer may want to connect slower I2C slave devices to the bus than defined in existing ACPI I2C slave connections. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-18i2c: designware: Implement support for SMBus block read and writeTin Huynh3-3/+45
Free and Open IPMI use SMBUS BLOCK Read/Write to support SSIF protocol. However, I2C Designware Core Driver doesn't handle the case at the moment. The below patch supports this feature. Signed-off-by: Tin Huynh <tnhuynh@apm.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-18i2c: constify i2c_adapter_quirks structuresJulia Lawall4-4/+4
Check for i2c_adapter_quirks structures that are only stored in the quirks field of an i2c_adapter structure. This field is declared const, so i2c_adapter_quirks structures that have this property can be declared as const also. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Ray Jui <ray.jui@broadcom.com> # for bcm-iproc Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-18i2c: digicolor: use clk_disable_unprepare instead of clk_unprepareWei Yongjun1-1/+1
since clk_prepare_enable() is used to get i2c->clk, we should use clk_disable_unprepare() to release it for the error path. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-18i2c: i2c-pxa-pci; make explicitly non-modularPaul Gortmaker1-23/+9
The Kconfig currently controlling compilation of this code is: drivers/i2c/busses/Kconfig:config I2C_PXA_PCI drivers/i2c/busses/Kconfig: def_bool I2C_PXA && X86_32 && PCI && OF ...meaning that it currently is not being built as a module by anyone. Lets remove the modular code that is essentially orphaned, so that when reading the driver there is no doubt it is builtin-only. We explicitly disallow a driver unbind, since that doesn't have a sensible use case anyway, and it allows us to drop the ".remove" code for non-modular drivers. Since module_pci_driver() uses the same init level priority as builtin_pci_driver() the init ordering remains unchanged with this commit. Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code. We also delete the MODULE_LICENSE tag etc. since all that information was (or is now) contained at the top of the file in the comments. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-17i2c: mux: mellanox: add driverVadim Pasternak3-0/+232
This driver allows I2C routing controlled through CPLD select registers on a wide range of Mellanox systems (CPLD Lattice device). MUX selection is provided by digital and analog HW. Analog part is not under SW control. Digital part is under CPLD control (channel selection/de-selection). Connectivity schema. .---. .-------------. | l | | |-- i2cx1 -- i2cx8 | i |-- i2cn --+--| mlxcpld mux | | n | | | |-- i2cy1 -- i2cy8 | u | | '-------------' | x | | | '---' '---------' i2c-mux-mlxpcld does not necessarily require i2c-mlxcpld. It can be used along with another bus driver, and still control i2c routing through CPLD mux selection, in case the system is equipped with CPLD capable of mux selection control. The Kconfig currently controlling compilation of this code is: drivers/i2c/muxes/Kconfig:config I2C_MUX_MLXCPLD Signed-off-by: Michael Shych <michaelsh@mellanox.com> Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-17i2c: Provide a temporary .probe_new() call-back typeLee Jones1-3/+12
This will aid the seamless removal of the current probe()'s, more commonly unused than used second parameter. Most I2C drivers can simply switch over to the new interface, others which have DT support can use its own matching instead and others can call i2c_match_id() themselves. This brings I2C's device probe method into line with other similar interfaces in the kernel and prevents the requirement to pass an i2c_device_id table. Suggested-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> [Kieran: fix rebase conflicts and adapt for dev_pm_domain_{attach,detach}] Tested-by: Kieran Bingham <kieran@bingham.xyz> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-17i2c: Export i2c_match_id() for direct use by device driversLee Jones1-1/+2
When there was no other way to match a I2C device to driver i2c_match_id() was exclusively used. However, now there are other types of tables which are commonly supplied, matching on an i2c_device_id table is used less frequently. Instead of _always_ calling i2c_match_id() from within the framework, we only need to do so from drivers which have no other way of matching. This patch makes i2c_match_id() available to the aforementioned device drivers. Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Tested-by: Kieran Bingham <kieran@bingham.xyz> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-17i2c: Make I2C ID tables non-mandatory for DT'ed devicesLee Jones1-2/+10
Currently the I2C framework insists on devices supplying an I2C ID table. Many of the devices which do so unnecessarily adding quite a few wasted lines to kernel code. This patch allows drivers a means to 'not' supply the aforementioned table and match on DT match tables instead. Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Tested-by: Kieran Bingham <kieran@bingham.xyz> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-17i2c: Match using traditional OF methods, then by vendor-less compatible stringsLee Jones1-0/+16
This function provides a single call for all I2C devices which need to match firstly using traditional OF means i.e by of_node, then if that fails we attempt to match using the supplied I2C client name with a list of supplied compatible strings with the '<vendor>,' string removed. The latter is required due to the unruly naming conventions used currently by I2C devices. Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> [Kieran: Fix static inline usage on !CONFIG_OF] Tested-by: Kieran Bingham <kieran@bingham.xyz> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-11-17i2c: Add the ability to match device to compatible string without an of_nodeLee Jones1-0/+30
A great deal of I2C devices are currently matched via DT node name, and as such the compatible naming convention of '<vendor>,<device>' has gone somewhat awry - some nodes don't supply one, some supply an arbitrary string and others the correct device name with an arbitrary vendor prefix. In an effort to correct this problem we have to supply a mechanism to match a device by compatible string AND by simple device name. This function strips off the '<vendor>,' part of a supplied compatible string and attempts to match without it. It is also used for sysfs, where a user can choose to instantiate a device on an i2c bus using the sysfs interface by providing a string and address to match and communicate with the device on the bus. Presently this string is only matched against the old i2c device id style strings, even in the presence of full device tree compatible strings with vendor prefixes. Providing a vendor-prefixed string to the sysfs interface will not match against the device tree of_match_device() calls as there is no device tree node to parse from the sysfs interface. This function can match both vendor prefixed and stripped compatible strings on the sysfs interface. Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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