Commit Graph

36 Commits

Author SHA1 Message Date
Krzysztof Kozlowski
319a538d61 slimbus: qcom-ngd-ctrl: reinit the reconf completion flag
Reinitialize the reconf completion flag when ngd registers are
not retainied or when enumeration is lost for ngd.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221118065246.6835-10-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-11-23 19:45:33 +01:00
Krzysztof Kozlowski
1d01bcb465 slimbus: qcom-ngd-ctrl: use devm_platform_get_and_ioremap_resource()
Simplify the code with devm_platform_get_and_ioremap_resource().

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221118065246.6835-9-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-11-23 19:45:33 +01:00
Krzysztof Kozlowski
4594cb4b76 slimbus: qcom-ngd-ctrl: add support for 44.1 Khz frequency
Add support for 44.1Khz frequency by dynamically calculating the slimbus
parameters instead of statically defining them.

Co-developed-by: Prudhvi Yarlagadda <pyarlaga@codeaurora.org>
Signed-off-by: Prudhvi Yarlagadda <pyarlaga@codeaurora.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221118065246.6835-5-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-11-23 19:45:33 +01:00
Krzysztof Kozlowski
63c60a226c slimbus: qcom-ngd-ctrl: drop PM runtime counter on transfer error paths
If transfer in qcom_slim_ngd_xfer_msg_sync() fails, we need to drop the
PM runtime usage counter to have it balanced.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221118065246.6835-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-11-23 19:45:32 +01:00
Krzysztof Kozlowski
97e1a53091 slimbus: qcom-ngd-ctrl: check for device runtime PM status during ISR
Slimbus core interrupt is getting fired after suspend. At this point
ADSP slimbus hardware is off with gated clocks which is leading to an
unclocked access when HLOS slimbus tried to read the interrupt
status register in the ISR.

Co-developed-by: Chandana Kishori Chiluveru <cchiluve@codeaurora.org>
Signed-off-by: Chandana Kishori Chiluveru <cchiluve@codeaurora.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221118065246.6835-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-11-23 19:45:32 +01:00
Lin Yujun
42992cf187 slimbus: qcom-ngd: Add error handling in of_qcom_slim_ngd_register
No error handling is performed when platform_device_add()
return fails. Refer to the error handling of driver_set_override(),
add error handling for platform_device_add().

Fixes: 917809e228 ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Lin Yujun <linyujun809@huawei.com>
Link: https://lore.kernel.org/r/20220914031953.94061-1-linyujun809@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-24 14:53:06 +02:00
Krzysztof Kozlowski
e7a3c8b9b1 slimbus: qcom-ngd: simplify error paths with dev_err_probe
Use dev_err_probe to skip printing of deferred probe errors and to
simplify error paths.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220916122910.170730-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-24 14:51:53 +02:00
Krzysztof Kozlowski
16f14551d0 slimbus: qcom-ngd: cleanup in probe error path
Add proper error path in probe() to cleanup resources previously
acquired/allocated to fix warnings visible during probe deferral:

  notifier callback qcom_slim_ngd_ssr_notify already registered
  WARNING: CPU: 6 PID: 70 at kernel/notifier.c:28 notifier_chain_register+0x5c/0x90
  Modules linked in:
  CPU: 6 PID: 70 Comm: kworker/u16:1 Not tainted 6.0.0-rc3-next-20220830 #380
  Call trace:
   notifier_chain_register+0x5c/0x90
   srcu_notifier_chain_register+0x44/0x90
   qcom_register_ssr_notifier+0x38/0x4c
   qcom_slim_ngd_ctrl_probe+0xd8/0x400
   platform_probe+0x6c/0xe0
   really_probe+0xbc/0x2d4
   __driver_probe_device+0x78/0xe0
   driver_probe_device+0x3c/0x12c
   __device_attach_driver+0xb8/0x120
   bus_for_each_drv+0x78/0xd0
   __device_attach+0xa8/0x1c0
   device_initial_probe+0x18/0x24
   bus_probe_device+0xa0/0xac
   deferred_probe_work_func+0x88/0xc0
   process_one_work+0x1d4/0x320
   worker_thread+0x2cc/0x44c
   kthread+0x110/0x114
   ret_from_fork+0x10/0x20

Fixes: e1ae85e183 ("slimbus: qcom-ngd-ctrl: add Protection Domain Restart Support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220916122910.170730-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-24 14:51:53 +02:00
Krzysztof Kozlowski
5038d21dde slimbus: qcom-ngd: use correct error in message of pdr_add_lookup() failure
Use correct error code, instead of previous 'ret' value, when printing
error from pdr_add_lookup() failure.

Fixes: e1ae85e183 ("slimbus: qcom-ngd-ctrl: add Protection Domain Restart Support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220916122910.170730-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-24 14:51:53 +02:00
Linus Torvalds
500a434fc5 Driver core changes for 5.19-rc1
Here is the set of driver core changes for 5.19-rc1.
 
 Note, I'm not really happy with this pull request as-is, see below for
 details, but overall this is all good for everything but a small set of
 systems, which we have a fix for already.
 
 Lots of tiny driver core changes and cleanups happened this cycle,
 but the two major things were:
 
 	- firmware_loader reorganization and additions including the
 	  ability to have XZ compressed firmware images and the ability
 	  for userspace to initiate the firmware load when it needs to,
 	  instead of being always initiated by the kernel. FPGA devices
 	  specifically want this ability to have their firmware changed
 	  over the lifetime of the system boot, and this allows them to
 	  work without having to come up with yet-another-custom-uapi
 	  interface for loading firmware for them.
 	- physical location support added to sysfs so that devices that
 	  know this information, can tell userspace where they are
 	  located in a common way.  Some ACPI devices already support
 	  this today, and more bus types should support this in the
 	  future.
 
 Smaller changes included:
 	- driver_override api cleanups and fixes
 	- error path cleanups and fixes
 	- get_abi script fixes
 	- deferred probe timeout changes.
 
 It's that last change that I'm the most worried about.  It has been
 reported to cause boot problems for a number of systems, and I have a
 tested patch series that resolves this issue.  But I didn't get it
 merged into my tree before 5.18-final came out, so it has not gotten any
 linux-next testing.
 
 I'll send the fixup patches (there are 2) as a follow-on series to this
 pull request if you want to take them directly, _OR_ I can just revert
 the probe timeout changes and they can wait for the next -rc1 merge
 cycle.  Given that the fixes are tested, and pretty simple, I'm leaning
 toward that choice.  Sorry this all came at the end of the merge window,
 I should have resolved this all 2 weeks ago, that's my fault as it was
 in the middle of some travel for me.
 
 All have been tested in linux-next for weeks, with no reported issues
 other than the above-mentioned boot time outs.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here is the set of driver core changes for 5.19-rc1.

  Lots of tiny driver core changes and cleanups happened this cycle, but
  the two major things are:

   - firmware_loader reorganization and additions including the ability
     to have XZ compressed firmware images and the ability for userspace
     to initiate the firmware load when it needs to, instead of being
     always initiated by the kernel. FPGA devices specifically want this
     ability to have their firmware changed over the lifetime of the
     system boot, and this allows them to work without having to come up
     with yet-another-custom-uapi interface for loading firmware for
     them.

   - physical location support added to sysfs so that devices that know
     this information, can tell userspace where they are located in a
     common way. Some ACPI devices already support this today, and more
     bus types should support this in the future.

  Smaller changes include:

   - driver_override api cleanups and fixes

   - error path cleanups and fixes

   - get_abi script fixes

   - deferred probe timeout changes.

  It's that last change that I'm the most worried about. It has been
  reported to cause boot problems for a number of systems, and I have a
  tested patch series that resolves this issue. But I didn't get it
  merged into my tree before 5.18-final came out, so it has not gotten
  any linux-next testing.

  I'll send the fixup patches (there are 2) as a follow-on series to this
  pull request.

  All have been tested in linux-next for weeks, with no reported issues
  other than the above-mentioned boot time-outs"

* tag 'driver-core-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits)
  driver core: fix deadlock in __device_attach
  kernfs: Separate kernfs_pr_cont_buf and rename_lock.
  topology: Remove unused cpu_cluster_mask()
  driver core: Extend deferred probe timeout on driver registration
  MAINTAINERS: add Russ Weight as a firmware loader maintainer
  driver: base: fix UAF when driver_attach failed
  test_firmware: fix end of loop test in upload_read_show()
  driver core: location: Add "back" as a possible output for panel
  driver core: location: Free struct acpi_pld_info *pld
  driver core: Add "*" wildcard support to driver_async_probe cmdline param
  driver core: location: Check for allocations failure
  arch_topology: Trace the update thermal pressure
  kernfs: Rename kernfs_put_open_node to kernfs_unlink_open_file.
  export: fix string handling of namespace in EXPORT_SYMBOL_NS
  rpmsg: use local 'dev' variable
  rpmsg: Fix calling device_lock() on non-initialized device
  firmware_loader: describe 'module' parameter of firmware_upload_register()
  firmware_loader: Move definitions from sysfs_upload.h to sysfs.h
  firmware_loader: Fix configs for sysfs split
  selftests: firmware: Add firmware upload selftests
  ...
2022-06-03 11:48:47 -07:00
Lad Prabhakar
228662b074 slimbus: qcom-ngd-ctrl: Use platform_get_irq() to get the interrupt
platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq().

Tested-By: Steev Klimaszewski <steev@kali.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220429165051.6187-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-05-09 15:42:09 +02:00
Krzysztof Kozlowski
0f4b20ef41 slimbus: qcom-ngd: Fix kfree() of static memory on setting driver_override
The driver_override field from platform driver should not be initialized
from static memory (string literal) because the core later kfree() it,
for example when driver_override is set via sysfs.

Use dedicated helper to set driver_override properly.

Fixes: 917809e228 ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220419113435.246203-11-krzysztof.kozlowski@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-22 17:13:54 +02:00
Srinivas Kandagatla
d77772538f slimbus: ngd: reset dma setup during runtime pm
During suspend/resume NGD remote instance is power cycled along
with remotely controlled bam dma engine.
So Reset the dma configuration during this suspend resume path
so that we are not dealing with any stale dma setup.

Without this transactions timeout after first suspend resume path.

Fixes: 917809e228 ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210809082428.11236-5-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-13 10:22:30 +02:00
Srinivas Kandagatla
c0e38eaa8d slimbus: ngd: set correct device for pm
For some reason we ended up using wrong device in some places for pm_runtime calls.
Fix this so that NGG driver can do runtime pm correctly.

Fixes: 917809e228 ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210809082428.11236-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-13 10:22:30 +02:00
Srinivas Kandagatla
d3bb5fe9ca slimbus: qcom-ngd-ctrl: remove redundant out of memory messages
Failure of dma_alloc_coherent will already throw a error message,
so addition message is really redundant here. Remove it!

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20201127102451.17114-8-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27 16:03:43 +01:00
Bjorn Andersson
39014ce6d6 slimbus: qcom-ngd-ctrl: Avoid sending power requests without QMI
Attempting to send a power request during PM operations, when the QMI
handle isn't initialized results in a NULL pointer dereference. So check
if the QMI handle has been initialized before attempting to post the
power requests.

Fixes: 917809e228 ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20201127102451.17114-7-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27 16:03:43 +01:00
Rikard Falkeborn
a35c6e18ab slimbus: qcom-ngd-ctrl: Constify static structs
qcom_slim_qmi_msg_handlers[] and qcom_slim_ngd_qmi_svc_event_ops are
only used as input arguments to qmi_handle_init() which accepts const
pointers to both qmi_ops and qmi_msg_handler. Make them const to allow
the compiler to put them in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20201127102451.17114-6-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27 16:03:43 +01:00
Srinivas Kandagatla
e1ae85e183 slimbus: qcom-ngd-ctrl: add Protection Domain Restart Support
Add support to protection domain restart. Protection domain restart
would also restart the service just like SSR.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20201127102451.17114-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27 16:03:42 +01:00
Srinivas Kandagatla
a899d32486 slimbus: qcom-ngd-ctrl: add Sub System Restart support
This patch adds SSR(SubSystem Restart) support which includes, synchronisation
between SSR and QMI server notifications. Also with this patch now NGD is taken
down by SSR instead of QMI server down notification.

NGD up path now relies on both SSR and QMI notifications and particularly
sequence of SSR up followed by QMI server up notification.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20201127102451.17114-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27 16:03:42 +01:00
Srinivas Kandagatla
709ec3f7fc slimbus: qcom-ngd-ctrl: disable ngd in qmi server down callback
In QMI new server notification we enable the NGD however during
delete server notification we do not disable the NGD.

This can lead to multiple instances of NGD being enabled, so make
sure that we disable NGD in delete server callback to fix this issue!

Fixes: 917809e228 ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200925095520.27316-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-09-25 14:41:51 +02:00
Srinivas Kandagatla
3871fdfd19 slimbus: ngd: remove redundant assignment
remove redundant assignment, as this is already done fewlines lines before.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200417093914.22052-1-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-28 15:02:47 +02:00
Srinivas Kandagatla
b58c663059 slimbus: ngd: get drvdata from correct device
Get drvdata directly from parent instead of ngd dev, as ngd
dev can probe defer and previously set drvdata will become null.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200417093618.7929-1-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-28 15:02:47 +02:00
Srinivas Kandagatla
f17f06a0c7 slimbus: ngd: add v2.1.0 compatible
This patch adds compatible for SlimBus Controller on SDM845.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200312152510.12224-1-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-12 16:51:15 +01:00
Peter Ujfalusi
7b73a9c8e2 slimbus: qcom-ngd-ctrl: Use dma_request_chan() instead dma_request_slave_channel()
dma_request_slave_channel() is a wrapper on top of dma_request_chan()
eating up the error code.

By using dma_request_chan() directly the driver can support deferred
probing against DMA.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200109103148.5612-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14 21:46:47 +01:00
Nishka Dasgupta
04eb94d526 slimbus: qcom-ngd-ctrl: Add of_node_put() before return
Each iteration of for_each_available_child_of_node puts the previous
node, but in the case of a return from the middle of the loop, there is
no put, thus causing a memory leak. Hence add an of_node_put before the
return in two places.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20190818093902.29993-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-08-18 12:56:10 +02:00
Kangjie Lu
06d5d6b7f9 slimbus: fix a potential NULL pointer dereference in of_qcom_slim_ngd_register
In case platform_device_alloc fails, the fix returns an error
code to avoid the NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-25 22:23:06 +02:00
Colin Ian King
649ad1165a slimbus: ngd: fix spelling mistake "exeeds" -> "exceeds"
There is a spelling mistake in a dev_err message, fix this.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-12-06 15:50:06 +01:00
Srinivas Kandagatla
458a445deb slimbus: ngd: Fix build error on x86
on non DT platforms like x86 of_match_node is set to NULL, dereferencing
directly would throw an error.
Fix this by doing this in two steps, get the match then the data.

Reported-by: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-27 08:44:06 +01:00
Srinivas Kandagatla
9431264178 slimbus: ngd: remove unnecessary check
SLIM_MSG_CLK_PAUSE_SEQ_FLG is never set in any of the slim core,
so performing a check in ngd driver is totally unnecessary.

Also this patch fixes warning about mc field overflow reported
with CoverityScan.

Making clk pause feature optional will be added to slim core in
next development cycle.

Reported-by: Colin Ian King <colin.king@canonical.com>
Fixes: 917809e228 ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-07 14:59:28 +01:00
Srinivas Kandagatla
0e321f19be slimbus: ngd: validate logical address assigned by remote
Validate logical address assigned by remote, in failure cases this value
is all zeors.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25 20:21:02 +02:00
Srinivas Kandagatla
94fe5f2b45 silmbus: ngd: register controller after power up.
Register slimbus controller only after finishing powerup sequnce so that we
do not endup in situation where core starts sending transactions before
the controller is ready.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25 20:21:02 +02:00
Srinivas Kandagatla
9652e6aa62 slimbus: ngd: return proper error code instead of zero
It looks like there is a typo in probe return. Fix it.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25 20:21:02 +02:00
Srinivas Kandagatla
1830dad34c slimbus: ngd: register ngd driver only once.
Move ngd platform driver out of loop so that it registers only once.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25 20:21:02 +02:00
Arnd Bergmann
2e6ae11dd0 slimbus: ngd: mark PM functions as __maybe_unused
qcom_slim_ngd_runtime_suspend is protected by an #ifdef,
qcom_slim_ngd_runtime_idle is now, which causes a build time warning:

drivers/slimbus/qcom-ngd-ctrl.c:1470:12: error: 'qcom_slim_ngd_runtime_idle' defined but not used [-Werror=unused-function]

Marking both as __maybe_unused lets us get rid of the warning
as well as the #ifdef.

Fixes: 917809e228 ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14 15:36:20 +02:00
Srinivas Kandagatla
52490169cd slimbus: ngd: add stream support
This patch adds support to stream support, this involve implementing
user specific implementation of Data channel management and channel
management SLIMbus messages.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07 17:25:23 +02:00
Srinivas Kandagatla
917809e228 slimbus: ngd: Add qcom SLIMBus NGD driver
This patch adds suppor to Qualcomm SLIMBus Non-Generic Device (NGD)
controller driver.
This is light-weight SLIMBus controller driver responsible for
communicating with slave HW directly over the bus using messaging
interface, and communicating with master component residing on ADSP
for bandwidth and data-channel management

Based on intial work from
Karthikeyan Ramasubramanian <kramasub@codeaurora.org> and
Sagar Dharia <sdharia@codeaurora.org>

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: Craig Tatlor <ctatlor97@gmail.com>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07 17:24:32 +02:00