Commit Graph

11 Commits

Author SHA1 Message Date
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