Commit Graph

102 Commits

Author SHA1 Message Date
Linus Torvalds
c9946d014f HSI changes for the v4.13 series
* misc. cleanups
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Merge tag 'hsi-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi

Pull HSI updates from Sebastian Reichel:
 "Misc cleanups"

* tag 'hsi-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi:
  HSI: core: Use kcalloc() in two functions
  HSI: Use kcalloc() in hsi_register_board_info()
  HSI: omap_ssi: Delete an error message for a failed memory allocation in ssi_add_controller()
  HSI: omap_ssi: Fix a typo in a comment line
  HSI: omap_ssi: Use devm_kcalloc() in ssi_add_controller()
  HSI: nokia-modem: Add a space character for better code readability in nokia_modem_probe()
  HSI: nokia-modem: Delete error messages for a failed memory allocation in two functions
  HSI: nokia-modem: Use devm_kcalloc() in nokia_modem_gpio_probe()
2017-07-04 14:28:22 -07:00
David S. Miller
ed66e50d95 hsi: Fix build regression due to netdev destructor fix.
> ../drivers/hsi/clients/ssi_protocol.c:1069:5: error: 'struct net_device' has no member named 'destructor'

Reported-by: Mark Brown <broonie@kernel.org>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-08 10:16:05 -04:00
Markus Elfring
67ddd75771 HSI: core: Use kcalloc() in two functions
Multiplications for the size determination of memory allocations
indicated that array data structures should be processed.
Thus use the corresponding function "kcalloc".

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
2017-06-08 13:21:43 +02:00
Markus Elfring
de7c98eb7c HSI: Use kcalloc() in hsi_register_board_info()
A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "kcalloc".

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
2017-06-08 13:21:43 +02:00
Markus Elfring
0fbad7c8e2 HSI: omap_ssi: Delete an error message for a failed memory allocation in ssi_add_controller()
The script "checkpatch.pl" pointed information out like the following.

WARNING: Possible unnecessary 'out of memory' message

Thus remove such a statement here.

Link: http://events.linuxfoundation.org/sites/events/files/slides/LCJ16-Refactor_Strings-WSang_0.pdf
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
2017-06-08 13:21:43 +02:00
Markus Elfring
8621e620c1 HSI: omap_ssi: Fix a typo in a comment line
Add a missing character in this description for a function call.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
2017-06-08 13:21:43 +02:00
Markus Elfring
4a8557de7f HSI: omap_ssi: Use devm_kcalloc() in ssi_add_controller()
* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "devm_kcalloc".

  This issue was detected by using the Coccinelle software.

* Replace the specification of a data type by a pointer dereference
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
2017-06-08 13:21:43 +02:00
Markus Elfring
34b2486def HSI: nokia-modem: Add a space character for better code readability in nokia_modem_probe()
The script "checkpatch.pl" pointed information out like the following.

ERROR: space required before the open parenthesis '('

Thus fix the affected source code place.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
2017-06-08 13:21:43 +02:00
Markus Elfring
4e3b9baa2f HSI: nokia-modem: Delete error messages for a failed memory allocation in two functions
The script "checkpatch.pl" pointed information out like the following.

WARNING: Possible unnecessary 'out of memory' message

Thus remove such statements here.

Link: http://events.linuxfoundation.org/sites/events/files/slides/LCJ16-Refactor_Strings-WSang_0.pdf
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
2017-06-08 13:21:43 +02:00
Markus Elfring
1be0593f05 HSI: nokia-modem: Use devm_kcalloc() in nokia_modem_gpio_probe()
* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "devm_kcalloc".

  This issue was detected by using the Coccinelle software.

* Replace the specification of a data structure by a pointer dereference
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
2017-06-08 13:21:43 +02:00
Dan Carpenter
3026050179 HSI: ssi_protocol: double free in ssip_pn_xmit()
If skb_pad() fails then it frees skb and we don't need to free it again
at the end of the function.

Fixes: dc7bf5d7 ("HSI: Introduce driver for SSI Protocol")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2017-04-21 17:58:45 +02:00
Ingo Molnar
174cd4b1e5 sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>
Fix up affected files that include this signal functionality via sched.h.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-03-02 08:42:32 +01:00
Dave Jiang
11bac80004 mm, fs: reduce fault, page_mkwrite, and pfn_mkwrite to take only vmf
->fault(), ->page_mkwrite(), and ->pfn_mkwrite() calls do not need to
take a vma and vmf parameter when the vma already resides in vmf.

Remove the vma parameter to simplify things.

[arnd@arndb.de: fix ARM build]
  Link: http://lkml.kernel.org/r/20170125223558.1451224-1-arnd@arndb.de
Link: http://lkml.kernel.org/r/148521301778.19116.10840599906674778980.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-02-24 17:46:54 -08:00
Jarod Wilson
b3e3893e12 net: use core MTU range checking in misc drivers
firewire-net:
- set min/max_mtu
- remove fwnet_change_mtu

nes:
- set max_mtu
- clean up nes_netdev_change_mtu

xpnet:
- set min/max_mtu
- remove xpnet_dev_change_mtu

hippi:
- set min/max_mtu
- remove hippi_change_mtu

batman-adv:
- set max_mtu
- remove batadv_interface_change_mtu
- initialization is a little async, not 100% certain that max_mtu is set
  in the optimal place, don't have hardware to test with

rionet:
- set min/max_mtu
- remove rionet_change_mtu

slip:
- set min/max_mtu
- streamline sl_change_mtu

um/net_kern:
- remove pointless ndo_change_mtu

hsi/clients/ssi_protocol:
- use core MTU range checking
- remove now redundant ssip_pn_set_mtu

ipoib:
- set a default max MTU value
- Note: ipoib's actual max MTU can vary, depending on if the device is in
  connected mode or not, so we'll just set the max_mtu value to the max
  possible, and let the ndo_change_mtu function continue to validate any new
  MTU change requests with checks for CM or not. Note that ipoib has no
  min_mtu set, and thus, the network core's mtu > 0 check is the only lower
  bounds here.

mptlan:
- use net core MTU range checking
- remove now redundant mpt_lan_change_mtu

fddi:
- min_mtu = 21, max_mtu = 4470
- remove now redundant fddi_change_mtu (including export)

fjes:
- min_mtu = 8192, max_mtu = 65536
- The max_mtu value is actually one over IP_MAX_MTU here, but the idea is to
  get past the core net MTU range checks so fjes_change_mtu can validate a
  new MTU against what it supports (see fjes_support_mtu in fjes_hw.c)

hsr:
- min_mtu = 0 (calls ether_setup, max_mtu is 1500)

f_phonet:
- min_mtu = 6, max_mtu = 65541

u_ether:
- min_mtu = 14, max_mtu = 15412

phonet/pep-gprs:
- min_mtu = 576, max_mtu = 65530
- remove redundant gprs_set_mtu

CC: netdev@vger.kernel.org
CC: linux-rdma@vger.kernel.org
CC: Stefan Richter <stefanr@s5r6.in-berlin.de>
CC: Faisal Latif <faisal.latif@intel.com>
CC: linux-rdma@vger.kernel.org
CC: Cliff Whickman <cpw@sgi.com>
CC: Robin Holt <robinmholt@gmail.com>
CC: Jes Sorensen <jes@trained-monkey.org>
CC: Marek Lindner <mareklindner@neomailbox.ch>
CC: Simon Wunderlich <sw@simonwunderlich.de>
CC: Antonio Quartulli <a@unstable.cc>
CC: Sathya Prakash <sathya.prakash@broadcom.com>
CC: Chaitra P B <chaitra.basappa@broadcom.com>
CC: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
CC: MPT-FusionLinux.pdl@broadcom.com
CC: Sebastian Reichel <sre@kernel.org>
CC: Felipe Balbi <balbi@kernel.org>
CC: Arvid Brodin <arvid.brodin@alten.se>
CC: Remi Denis-Courmont <courmisch@gmail.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-20 14:51:10 -04:00
Sebastian Reichel
9c99e5e519 HSI: omap_ssi: drop pm_runtime_irq_safe
pm_runtime_irq_safe increases the parents runtime usage
counter effectively keeping the OMAP SoC from idling.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:40:08 +02:00
Sebastian Reichel
ad60db2f9f HSI: omap_ssi_port: use rpm autosuspend API
Instead of immediately sending the SSI module to
sleep, wait some time in case of new incoming or
outgoing traffic.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:40:03 +02:00
Sebastian Reichel
4e552310cd HSI: omap_ssi: call msg->complete() from process context
msg->complete() should always be called from process context once
irq_safe runtime pm flag is no longer set for omap-ssi.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:40:00 +02:00
Sebastian Reichel
604fdfa458 HSI: omap_ssi_port: ensure clocks are kept enabled during transfer
ensure, that clocks remain enabled, when a transfer is started.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:39:56 +02:00
Sebastian Reichel
d2b8d695c6 HSI: omap_ssi_port: replace pm_runtime_put_sync with non-sync variant
There is no need to wait for hardware to really reach idle states,
so just release runtime PM asynchronously.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:39:43 +02:00
Sebastian Reichel
fa1572d956 HSI: omap_ssi_port: avoid calling runtime_pm_*_sync inside spinlock
runtime_pm_*_sync can block when irq_safe flag is removed
from omap-ssi driver, so it may not be called while a
spinlock is held.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:39:39 +02:00
Sebastian Reichel
62aa292b3e HSI: omap_ssi_port: avoid pm_runtime_get_sync in ssi_start_dma and ssi_start_pio
These functions may be called from atomic context,
so avoid synchronous runtime pm calls.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:39:36 +02:00
Sebastian Reichel
c4a6257315 HSI: omap_ssi_port: switch to threaded pio irq
Move pio interrupt handler from tasklet into thread to
allow runtime_pm_get_sync calls without irq_safe being
set.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:39:32 +02:00
Sebastian Reichel
927d3f8f73 HSI: omap_ssi_core: remove pm_runtime_get_sync call from tasklet
We may not call pm_runtime_get_sync() from tasklet, since
it can block once pm_runtime_irq_safe is removed for omap-ssi.

Since irq can should only be created for a running device,
we assume, that the device is already running and use non-
synchronous API instead.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:39:26 +02:00
Sebastian Reichel
ea88f717cd HSI: omap_ssi_core: use pm_runtime_put instead of pm_runtime_put_sync
There is no need to disable the device synchronously, so
don't do it.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:39:21 +02:00
Sebastian Reichel
7c5d81620e HSI: omap_ssi_port: prepare start_tx/stop_tx for blocking pm_runtime calls
ssi_start_tx and ssi_stop_tx may be called from atomic context. Once
pm_runtime_irq_safe() is removed for omap-ssi, this will fail, due
to blocking pm_runtime_*_sync() calls.

This fixes ssi_stop_tx by using non-sync API and ssi_start_tx by
using a worker thread.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:39:15 +02:00
Sebastian Reichel
de5a3774dd HSI: core: switch port event notifier from atomic to blocking
port events should be sent from process context after
irq_safe runtime pm flag is removed in omap-ssi.

Signed-off-By: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:38:53 +02:00
Sebastian Reichel
2083057aac HSI: omap_ssi_port: replace wkin_cken with atomic bitmap operations
This simplifies the code and avoids holding a spin_lock when
runtime pm calls are made. Once the irq_safe flag is removed
for omap_ssi's runtime pm, pm_runtime_get/put_sync can sleep,
which is a no-go while holding a spin_lock.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:38:47 +02:00
Sebastian Reichel
cb70e4c1bc HSI: omap_ssi: convert cawake irq handler to thread
Convert cawake interrupt handler from tasklet to
threaded interrupt handler in preparation of
blocking runtime_pm calls.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:38:43 +02:00
Sebastian Reichel
df26d639e2 HSI: ssi_protocol: fix ssip_xmit invocation
ssip_xmit should be called from process context,
since it calls hsi_async_write.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:38:37 +02:00
Sebastian Reichel
866dcb9d57 HSI: ssi_protocol: replace spin_lock with spin_lock_bh
To avoid setting irq_safe runtime pm flag in omap-ssi, multiple calls
will be moved to process context. This also affects ssi-protocol, so
use the safer spin_lock_bh instead of a simple spin_lock.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:38:32 +02:00
Sebastian Reichel
6d6c30973b HSI: ssi_protocol: avoid ssi_waketest call with held spinlock
This avoids calling ssi_waketest(), while a spinlock is
being hold, since ssi_waketest may sleep once irq_safe
runtime pm is disabled.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:37:58 +02:00
Sebastian Reichel
b6616be324 HSI: omap_ssi: do not reset module
module reset and power management rule setup
is already done by hwmod. Remove this cruft,
which predates hwmod.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:37:43 +02:00
Sebastian Reichel
8c009f1f5d HSI: omap_ssi_port: remove useless newline
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
2016-06-28 00:37:20 +02:00
Andrew F. Davis
e01957abd4 hsi: Build hsi_boardinfo.c into hsi core if enabled
If the HSI core is built as a module hsi_boardinfo may still
be built-in as its Kconfig type is bool, which can cause build
issues. Fix this by building this code into the HSI core when
enabled.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-06-15 16:02:50 +02:00
Iago Abal
3c13ab1d96 HSI: cmt_speech: Fix double spin_lock
Release &hi->lock before calling `cs_hsi_control_read_error' to avoid deadlock.

The bug was found using EBA (https://github.com/models-team/eba), which reported
the following:

    Double lock
    first at drivers/hsi/clients/cmt_speech.c:443
    second at drivers/hsi/clients/cmt_speech.c:447
    In cs_hsi_read_on_control_complete defined at drivers/hsi/clients/cmt_speech.c:438:
    (!) drivers/hsi/clients/cmt_speech.c:443: spin_lock(& hi->lock);
    (?) drivers/hsi/clients/cmt_speech.c:445: msg->status == 4 -> true
    (!) drivers/hsi/clients/cmt_speech.c:447: cs_hsi_control_read_error(hi, msg);
        (!) drivers/hsi/clients/cmt_speech.c:407: __cs_hsi_error_pre(hi, msg, "control read",
                       & hi->control_state);
            (!) drivers/hsi/clients/cmt_speech.c:382: spin_lock(& hi->lock);

Signed-off-by: Iago Abal <mail@iagoabal.eu>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-06-10 00:08:10 +02:00
Muhammad Falak R Wani
b32bd7e7d5 hsi: use kmemdup
Use kmemdup when some other buffer is immediately copied into allocated
region. It replaces call to allocation followed by memcpy, by a single
call to kmemdup.

Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-05-29 20:38:02 +02:00
Muhammad Falak R Wani
f6004b7bc6 HSI: cmt_speech: use vma_pages().
Replace explicit computation of vma page count by a call to
vma_pages()

Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-05-29 20:37:45 +02:00
Arnd Bergmann
c2f90a465d HSI: omap-ssi: move omap_ssi_port_update_fclk
After the clk change support, the ssi omap ssi core driver
now calls into the port driver to change fclk. This function
was previously inside of an #ifdef, because it was only used
when CONFIG_PM is enabled. Now it also gets used without
power management support:

drivers/hsi/built-in.o: In function `ssi_clk_event':
omap_ssi_port.c:(.text+0x1bf8): undefined reference to `omap_ssi_port_update_fclk'

This moves the function outside of the CONFIG_PM guard.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 4bcf741452 ("HSI: omap-ssi: add clk change support")
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-05-09 22:45:18 +02:00
Arnd Bergmann
ac8e3ff3a0 HSI: omap-ssi: include pinctrl header files
The driver now uses some pinctrl functions, but fails
to build if PINCTRL is disabled because the respective
header files are only included indirectly:

drivers/hsi/controllers/omap_ssi_core.c: In function 'ssi_clk_event':
drivers/hsi/controllers/omap_ssi_core.c:317:4: error: implicit declaration of function 'pinctrl_pm_select_idle_state' [-Werror=implicit-function-declaration]
drivers/hsi/controllers/omap_ssi_core.c:339:4: error: implicit declaration of function 'pinctrl_pm_select_default_state' [-Werror=implicit-function-declaration]
drivers/hsi/controllers/omap_ssi_port.c: In function 'ssi_flush':
drivers/hsi/controllers/omap_ssi_port.c:520:2: error: implicit declaration of function 'pinctrl_pm_select_idle_state' [-Werror=implicit-function-declaration]

This includes the headers from the files that call the functions,
which works even if pinctrl is turned off.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 4bcf741452 ("HSI: omap-ssi: add clk change support")
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-05-09 22:45:18 +02:00
Arnd Bergmann
53c703501e HSI: omap-ssi: add COMMON_CLK dependency
Enabling the omap ssi driver without COMMON_CLK results in a build failure:

drivers/hsi/controllers/omap_ssi_core.c: In function 'ssi_clk_event':
drivers/hsi/controllers/omap_ssi_core.c:304:7: error: 'PRE_RATE_CHANGE' undeclared (first use in this function)

This adds a Kconfig dependency to avoid the invalid configuration.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 4bcf741452 ("HSI: omap-ssi: add clk change support")
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-05-09 22:45:18 +02:00
Sebastian Reichel
4bcf741452 HSI: omap-ssi: add clk change support
This adds support for frequency changes of the SSI
functional clock, which may occur due to DVFS.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-By: Sebastian Reichel <sre@kernel.org>
2016-05-02 21:56:25 +02:00
Sebastian Reichel
0fae198988 HSI: omap_ssi: built omap_ssi and omap_ssi_port into one module
Merge omap_ssi and omap_ssi_port into one module. This
fixes problems with module cycle dependencies introduced
by future patches.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-05-02 21:56:21 +02:00
Sebastian Reichel
2a57aba850 HSI: omap_ssi: fix removal of port platform device
This avoids removal of the HSI port device when
only the platform port device should be removed
and clears the POPULATED bit in the DT node, so
that a new platform device is created when the
driver is probed again.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-05-02 21:56:17 +02:00
Sebastian Reichel
0845e1f20a HSI: omap_ssi: make sure probe stays available
device can be unbind/rebind, so probe should
stay available.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-05-02 21:56:12 +02:00
Sebastian Reichel
f704e1103e HSI: omap_ssi: fix module unloading
Removal of ssi controller debugfs directory must
happen after the clients have been removed from
it.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-05-02 21:56:01 +02:00
Sebastian Reichel
73e6ce09c0 HSI: omap_ssi_port: switch to gpiod API
Simplify driver by switching to new gpio descriptor based API.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-05-02 21:55:20 +02:00
Sebastian Reichel
87d99063be HSI: ssi-protocol: Use handshake logic from n950
When using the ssi-protocol driver with the Nokia N950, the
following error is thrown during modem powered up sequence.

[13852.274993]  port0: SSI error: 0x01
[13852.279205] ssi-protocol ssi-protocol: RX error detected
[13852.284820] ssi-protocol ssi-protocol: Main state: 1
[13852.290069] ssi-protocol ssi-protocol: Recv state: 0
[13852.295288] ssi-protocol ssi-protocol: Send state: 0
[13852.300537] ssi-protocol ssi-protocol: CMT Offline
[13852.305603] ssi-protocol ssi-protocol: Wake test 1
[13852.310638] ssi-protocol ssi-protocol: Data RX id: 0
[13852.315887] ssi-protocol ssi-protocol: Data TX id: 0
[13856.001464] ssi-protocol ssi-protocol: Watchdog trigerred
[13856.007293] ssi-protocol ssi-protocol: Main state: 1
[13856.012542] ssi-protocol ssi-protocol: Recv state: 0
[13856.017761] ssi-protocol ssi-protocol: Send state: 0
[13856.023010] ssi-protocol ssi-protocol: CMT Offline
[13856.028045] ssi-protocol ssi-protocol: Wake test 0
[13856.033111] ssi-protocol ssi-protocol: Data RX id: 0
[13856.038330] ssi-protocol ssi-protocol: Data TX id: 0

This patch fixes the issue by using the handshake setup from
the Nokia N950 kernel. The new handshake sequence also works
with the N900, so there is no need to differentiate between
both modems.

Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-01-28 17:47:56 +01:00
Sebastian Reichel
633f67a51d HSI: nokia-modem: add n950 and n9 support
The Nokia N950 and Nokia N9 also have a SSI connected
modem, which use the same protocols as the Nokia N900,
but with increased link speed (96000 kbps instead of
55000 kbps) and with less GPIOs.

Since it's unclear, if the N950 and the N9 use exactly
the same modem, each of them gets their own compatible
string.

Acked-by: Rob Herring <robh@kernel.org>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-01-28 17:46:08 +01:00
Andrzej Hajda
525e1abc6b HSI: omap_ssi_port: fix handling of_get_named_gpio result
The function can return negative value.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-01-07 16:07:54 +01:00
Andrzej Hajda
6bf6ded300 HSI: omap_ssi: fix handling ida_simple_get result
The function can return negative value.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-01-07 16:06:22 +01:00