- 02 Mar, 2012 1 commit
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Stephen Warren authored
At present, pinctrl_get() assumes that all matching mapping table entries have the same "function" value, albeit potentially applied to different pins/groups. This change removes this restriction; pinctrl_get() can now handle a set of mapping tables where different functions are applied to the various pins/groups. Signed-off-by:
Stephen Warren <swarren@nvidia.com> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org>
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- 29 Feb, 2012 3 commits
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Stephen Warren authored
The debugfs file pinctrl-maps is a system-wide file, not specific to any pin controller, so place it in the top-level directory. Also, move the code implementing the file to keep the order of all the functions matching the order they're created in pinctrl_init_*debugfs(). The only non-obvious change here is no private data is passed to debugfs_create_file() or single_open(). Signed-off-by:
Dong Aisheng <dong.aisheng@linaro.org> Signed-off-by:
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Stephen Warren authored
The lookup key in struct pinctrl_map is (.dev_name, .name). Re-order the struct definition to put the lookup key fields first, and the result values afterwards. To me at least, this slightly better reflects the lookup process. Update the documentation in a similar fashion. Note: PIN_MAP*() macros aren't updated; I plan to update this once later when enhancing the mapping table format to support pin config to reduce churn. Signed-off-by:
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Linus Walleij authored
The debugfs file pinmux-pins used to tell which function was enabled but now states simply which device owns the pin. Being owned by the pinctrl driver itself means just that it's hogged so be a bit more helpful by printing that. ChangeLog v1->v2: - Preserve the self-referential owner field, just clarify that when the pin controller states itself as owner this means that it's hogged. Acked-by:
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- 24 Feb, 2012 4 commits
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Stephen Warren authored
struct pinctrl_dev's pin_desc_tree_lock and pinctrl_hogs_lock aren't useful; the data they protect is read-only except when registering or unregistering a pinctrl_dev, and at those times, it doesn't make sense to protect one part of the structure independently from the rest. Move pinctrl_init_device_debugfs() to the end of pinctrl_register() so that debugfs can't access the struct pinctrl_dev until it's fully initialized, i.e. after the hogs are set up. Signed-off-by:
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Stephen Warren authored
This hopefully makes it harder to take the sizeof the wrong type. Signed-off-by:
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Stephen Warren authored
e.g. dev_err instead of pr_err prints messages in a slightly more standardized format. Also, add a few more error messages to track down errors. Also, some small cleanups of messages. Signed-off-by:
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Stephen Warren authored
Hog entries are mapping table entries with .ctrl_dev_name == .dev_name. All other mapping table entries need .dev_name set so that they will match some pinctrl_get() call. All extant PIN_MAP*() macros set .dev_name. So, there is no reason to allow mapping table entries without .dev_name set. Update the code and documentation to disallow this. Signed-off-by:
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- 22 Feb, 2012 14 commits
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Stephen Warren authored
pinconf_groups_show() wrote all debug information on one line. Fix it to match pinconf_pins_show() and be legible. Signed-off-by:
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Stephen Warren authored
When pins are requested/acquired/got, some device becomes the owner of their mux setting. At this point, it isn't certain which mux function will be selected for the pin, since this may vary between each of the device's states in the pinctrl mapping table. As such, we should record the owning device, not what we think the initial mux setting will be, when requesting pins. This doesn't make a lot of difference right now since pinctrl_get gets only one single device/state combination, but this will make a difference when pinctrl_get gets all states, and pinctrl_select_state can switch between states. Signed-off-by:
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Stephen Warren authored
This is a serious error, and the pin control system will not function correctly if it ends up not programing the mapping table entries into the HW. Instead of just ignoring this, error out. Signed-off-by:
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Stephen Warren authored
This may be perfectly legitimate. An IP block may get re-used across SoCs. Not all of those SoCs may need pinmux settings for the IP block, e.g. if one SoC dedicates pins to that function but another doesn't. The driver won't know this, and will always attempt to set up the pinmux. The mapping table defines whether any HW programming is actually needed. Acked-by:
Shawn Guo <shawn.guo@linaro.org> Signed-off-by:
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Stephen Warren authored
These are already disallowed. Clean up some code that doesn't assume this. Signed-off-by:
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Linus Walleij authored
This solves the riddle on how the U300 pin controller shall be able to reference the struct gpio_chip even though these are two separate drivers: spawn the pinctrl child from the GPIO driver and pass in the struct gpio_chip as platform data. In the process we rename the U300 "pinmux-u300" to "pinctrl-u300" so as not to confuse. Signed-off-by: -
Stephen Warren authored
* Make all functions internal to core.c static. Remove any of these from core.h. * Add any missing EXPORT_SYMBOL_GPL(). Signed-off-by:
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Stephen Warren authored
Modify the two files so that the order of function prototypes in the header matches the order of implementations in the .c file. Don't prototype a couple of internal functions. Signed-off-by:
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Stephen Warren authored
Modify the two files so that the order of function prototypes in the header matches the order of implementations in the .c file. Signed-off-by:
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Stephen Warren authored
Instead of storing a single array of mapping table entries, which requires realloc()ing that array each time it's extended and copying the new data, simply store a list of pointers to the individual chunks. This also removes the need to copy the mapping table at all; a pointer is maintained to the original table, this saving memory. A macro for_each_maps() is introduced to hide the additional complexity of iterating over the map entries. This change will also simplify removing chunks of entries from the mapping table. This isn't important right now, but will be in the future, when mapping table entries are dynamically added when parsing them from the device tree, and removed when drivers no longer need to interact with pinctrl. Signed-off-by:
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Stephen Warren authored
This mostly makes debugfs files print things in the order that they were added or acquired, which just feels a little more consistent. Signed-off-by:
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Stephen Warren authored
It may be common for pinctrl_register_mappings() to be used from __init context, but there's no reason that additional mappings shouldn't be added at a later point, e.g. if loading modules that add pin controllers and their mapping tables. Signed-off-by:
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Stephen Warren authored
Commit 77a59883 "pinctrl: changes hog mechanism to be self-referential" modified the way "hog" entries were represented in the mapping table. However, the new representation failed some error checks in pinctrl_hog_map(). Remove the now-bogus error-check, and fix the code to solve the issue the error-check used to avoid. Acked-by:
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Linus Walleij authored
We changed the signature of the pin multiplexing functions to handle any pin business, so fix up the Sirf driver to call this new interface and rename some variables to make the semantics understandable. Cc: linux-serial@vger.kernel.org Acked-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by:
Barry Song <Baohua.Song@csr.com> Signed-off-by:
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- 10 Feb, 2012 4 commits
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Linus Walleij authored
Instead of a specific boolean field to indicate if a map entry shall be hogged, treat self-reference as an indication of desired hogging. This drops one field off the map struct and has a nice Douglas R. Hofstadter-feel to it. Acked-by:
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Linus Walleij authored
This moves the per-devices struct pinctrl handles and device map over from the pinmux part of the subsystem to the core pinctrl part. This makes the device handles core infrastructure with the goal of using these handles also for pin configuration, so that device drivers (or boards etc) will need one and only one handle to the pin control core. Acked-by:
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Linus Walleij authored
Since we want to use the former pinmux handles and mapping tables for generic control involving both muxing and configuration we begin refactoring by renaming them from pinmux_* to pinctrl_*. ChangeLog v1->v2: - Also rename the PINMUX_* macros in machine.h to PIN_ as indicated in the documentation so as to reflect the generic nature of these mapping entries from now on. Acked-by:
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Linus Walleij authored
This breaks out a <linux/pinctrl/consumer.h> header to be used by all pinmux and pinconfig alike, so drivers needing services from pinctrl does not need to include different headers. This is similar to the approach taken by the regulator API. Acked-by:
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- 01 Feb, 2012 3 commits
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Haojian Zhuang authored
Support PXA168/PXA910/MMP2 pinmux. Now only support function switch. Signed-off-by:
Haojian Zhuang <haojian.zhuang@marvell.com> [Rebase and fix some whitespace issues] Signed-off-by:
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Linus Walleij authored
After discussion with Mark Brown in an unrelated thread about ADC lookups, it came to my knowledge that the ability to pass a struct device * in the regulator consumers is just a historical artifact, and not really recommended. Since there are no in-kernel users of these pointers, we just kill them right now, before someone starts to use them. Reviewed-by:
Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by:
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Linus Walleij authored
Commit ca53c5f1 ("pinctrl: conjure names for unnamed pins") made pins lose their identity and only get autogenerated names. Acked-by:
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- 31 Jan, 2012 4 commits
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Linus Torvalds authored
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git://github.com/prasad-joshi/logfs_upstreamLinus Torvalds authored
There are few important bug fixes for LogFS * tag 'for-linus' of git://github.com/prasad-joshi/logfs_upstream: Logfs: Allow NULL block_isbad() methods logfs: Grow inode in delete path logfs: Free areas before calling generic_shutdown_super() logfs: remove useless BUG_ON MAINTAINERS: Add Prasad Joshi in LogFS maintiners logfs: Propagate page parameter to __logfs_write_inode logfs: set superblock shutdown flag after generic sb shutdown logfs: take write mutex lock during fsync and sync logfs: Prevent memory corruption logfs: update page reference count for pined pages Fix up conflict in fs/logfs/dev_mtd.c due to semantic change in what "mtd->block_isbad" means in commit f2933e86: "Logfs: Allow NULL block_isbad() methods" clashing with the abstraction changes in the commits 7086c19d: "mtd: introduce mtd_block_isbad interface" and d58b27ed: "logfs: do not use 'mtd->block_isbad' directly". This resolution takes the semantics from commit f2933e86, and just makes mtd_block_isbad() return zero (false) if the 'block_isbad' function is NULL. But that also means that now "mtd_can_have_bb()" always returns 0. Now, "mtd_block_markbad()" will obviously return an error if the low-level driver doesn't support bad blocks, so this is somewhat non-symmetric, but it actually makes sense if a NULL "block_isbad" function is considered to mean "I assume that all my blocks are always good".
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Linus Torvalds authored
Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging * 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: (w83627ehf) Disable setting DC mode for pwm2, pwm3 on NCT6776F hwmon: (sht15) fix bad error code MAINTAINERS: Drop maintainer for MAX1668 hwmon driver MAINTAINERS: Add hwmon entries for Wolfson hwmon: (f71805f) Fix clamping of temperature limits
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlLinus Torvalds authored
Here are some fixes to the pin control system that has accumulated since -rc1. Mainly Tony Lindgren fixed the module load/unload logic and the rest are minor fixes and documentation. * 'for-torvalds' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: pinctrl: add checks for empty function names pinctrl: fix pinmux_hog_maps when ctrl_dev_name is not set pinctrl: fix some pinmux typos pinctrl: free debugfs entries when unloading a pinmux driver pinctrl: unbreak error messages Documentation/pinctrl: fix a few syntax errors in code examples pinctrl: fix pinconf_pins_show iteration
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- 30 Jan, 2012 7 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/ttyLinus Torvalds authored
Here are some tty/serial patches for 3.3-rc1 Big thing here is the movement of the 8250 serial drivers to their own directory, now that the patch churn has calmed down. Other than that, only minor stuff (omap patches were reverted as they were found to be wrong), and another broken driver removed from the system. Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de> * tag 'tty-3.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: serial: Kill off Moorestown code Revert "tty: serial: OMAP: ensure FIFO levels are set correctly in non-DMA mode" Revert "tty: serial: OMAP: transmit FIFO threshold interrupts don't wake the chip" serial: Fix wakeup init logic to speed up startup docbook: don't use serial_core.h in device-drivers book serial: amba-pl011: lock console writes against interrupts amba-pl011: do not disable RTS during shutdown tty: serial: OMAP: transmit FIFO threshold interrupts don't wake the chip tty: serial: OMAP: ensure FIFO levels are set correctly in non-DMA mode omap-serial: make serial_omap_restore_context depend on CONFIG_PM_RUNTIME omap-serial :Make the suspend/resume functions depend on CONFIG_PM_SLEEP. TTY: fix UV serial console regression jsm: Fixed EEH recovery error Updated TTY MAINTAINERS info serial: group all the 8250 related code together
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usbLinus Torvalds authored
Here are a bunch of USB patches for 3.3-rc1. Nothing major, largest thing here is the removal of some drivers that did not work at all. Other than that, the normal collection of bugfixes and new device ids. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds authored
1) Setting link attributes can modify the size of the attributes that would be reported on a subsequent getlink netlink operation, therefore min_ifinfo_dump_size needs to be adjusted. From Stefan Gula. 2) Resegmentation of TSO frames while trimming can violate invariants expected by callers, namely that the number of segments can only stay the same or decrease, never increase. If MSS changes, however, we can trim data but then end up with more segments. Fix this by only segmenting to the MSS already recorded in the SKB. That's the simplest fix for now and if we want to get more fancy in the future that's a more involved change. This probably explains some retransmit counter inaccuracies. From Neal Cardwell. 3) Fix too-many-wakeups in POLL with AF_UNIX sockets, from Eric Dumazet. 4) Fix CAIF crashes wrt. namespace handling. From Eric Dumazet and Eric W. Biederman. 5) TCP port selection fixes from Flavio Leitner. 6) More socket memory cgroup build fixes in certain randonfig situations. From Glauber Costa. 7) Fix TCP memory sysctl regression reported by Ingo Molnar, also from Glauber Costa. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: af_unix: fix EPOLLET regression for stream sockets tcp: fix tcp_trim_head() to adjust segment count with skb MSS net/tcp: Fix tcp memory limits initialization when !CONFIG_SYSCTL net caif: Register properly as a pernet subsystem. netns: Fail conspicously if someone uses net_generic at an inappropriate time. net: explicitly add jump_label.h header to sock.h net: RTNETLINK adjusting values of min_ifinfo_dump_size ipv6: Fix ip_gre lockless xmits. xen-netfront: correct MAX_TX_TARGET calculation. netns: fix net_alloc_generic() tcp: bind() optimize port allocation tcp: bind() fix autoselection to share ports l2tp: l2tp_ip - fix possible oops on packet receive iwlwifi: fix PCI-E transport "inta" race mac80211: set bss_conf.idle when vif is connected mac80211: update oper_channel on ibss join
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulatorLinus Torvalds authored
This fixes an integration issue with the regulator device tree bindings which shook out in -rc. The bindings were overly enthusiatic when deciding to set a voltage on a regulator and would try to set zero volts on an unconfigured regulator which isn't supported. * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: regulator: Set apply_uV only when min and max voltages are defined
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Eric Dumazet authored
Commit 0884d7aa (AF_UNIX: Fix poll blocking problem when reading from a stream socket) added a regression for epoll() in Edge Triggered mode (EPOLLET) Appropriate fix is to use skb_peek()/skb_unlink() instead of skb_dequeue(), and only call skb_unlink() when skb is fully consumed. This remove the need to requeue a partial skb into sk_receive_queue head and the extra sk->sk_data_ready() calls that added the regression. This is safe because once skb is given to sk_receive_queue, it is not modified by a writer, and readers are serialized by u->readlock mutex. This also reduce number of spinlock acquisition for small reads or MSG_PEEK users so should improve overall performance. Reported-by:
Nick Mathewson <nickm@freehaven.net> Signed-off-by:
Eric Dumazet <eric.dumazet@gmail.com> Cc: Alexey Moiseytsev <himeraster@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Neal Cardwell authored
This commit fixes tcp_trim_head() to recalculate the number of segments in the skb with the skb's existing MSS, so trimming the head causes the skb segment count to be monotonically non-increasing - it should stay the same or go down, but not increase. Previously tcp_trim_head() used the current MSS of the connection. But if there was a decrease in MSS between original transmission and ACK (e.g. due to PMTUD), this could cause tcp_trim_head() to counter-intuitively increase the segment count when trimming bytes off the head of an skb. This violated assumptions in tcp_tso_acked() that tcp_trim_head() only decreases the packet count, so that packets_acked in tcp_tso_acked() could underflow, leading tcp_clean_rtx_queue() to pass u32 pkts_acked values as large as 0xffffffff to ca_ops->pkts_acked(). As an aside, if tcp_trim_head() had really wanted the skb to reflect the current MSS, it should have called tcp_set_skb_tso_segs() unconditionally, since a decrease in MSS would mean that a single-packet skb should now be sliced into multiple segments. Signed-off-by:
Neal Cardwell <ncardwell@google.com> Acked-by:
Nandita Dukkipati <nanditad@google.com> Acked-by:
Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by:
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Glauber Costa authored
sysctl_tcp_mem() initialization was moved to sysctl_tcp_ipv4.c in commit 3dc43e3e, since it became a per-ns value. That code, however, will never run when CONFIG_SYSCTL is disabled, leading to bogus values on those fields - causing hung TCP sockets. This patch fixes it by keeping an initialization code in tcp_init(). It will be overwritten by the first net namespace init if CONFIG_SYSCTL is compiled in, and do the right thing if it is compiled out. It is also named properly as tcp_init_mem(), to properly signal its non-sysctl side effect on TCP limits. Reported-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
Glauber Costa <glommer@parallels.com> Cc: David S. Miller <davem@davemloft.net> Link: http://lkml.kernel.org/r/4F22D05A.8030604@parallels.com [ renamed the function, tidied up the changelog a bit ] Signed-off-by:
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