kernel/linux.git/drivers/slimbus, branch v4.19.77

slimbus: fix a potential NULL pointer dereference in of_qcom_slim_ngd_register

2019-05-31T13:46:14+00:00

[ Upstream commit 06d5d6b7f9948a89543e1160ef852d57892c750d ] In case platform_device_alloc fails, the fix returns an error code to avoid the NULL pointer dereference. Signed-off-by: Kangjie Lu Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

slimbus: ngd: mark PM functions as __maybe_unused

2018-12-19T18:19:49+00:00

Commit 2e6ae11dd0d1c37f44cec51a58fb2092e55ed0f5 upstream. 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: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Signed-off-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

slimbus: stream: Fix htmldocs warnings

2018-07-08T13:19:04+00:00

This patch fixes below warning during building htmldoc: slimbus.h:352: warning: Function parameter or member 'name' not described in 'slim_stream_runtime' This patch also removes documentation for state variable in struct slim_stream_runtime which was redundant and removed. Reported-by: kbuild test robot Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

slimbus: ngd: add stream support

2018-07-07T15:25:23+00:00

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 Signed-off-by: Greg Kroah-Hartman

slimbus: stream: add stream support

2018-07-07T15:25:23+00:00

This patch adds support to SLIMbus stream apis for slimbus device. SLIMbus streaming involves adding support to Data Channel Management and channel Reconfiguration Messages to slim core plus few stream apis. >From slim device side the apis are very simple mostly inline with other stream apis. Currently it only supports Isochronous and Push/Pull transport protocols, which are sufficient for audio use cases. Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

slimbus: ngd: Add qcom SLIMBus NGD driver

2018-07-07T15:24:32+00:00

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 and Sagar Dharia Signed-off-by: Srinivas Kandagatla Tested-by: Craig Tatlor Reviewed-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

slimbus: messaging: add slim_alloc/free_txn_tid()

2018-07-07T15:24:32+00:00

This patch adds slim_alloc_txn_tid() and slim_free_txn_tid() api to allow controllers like ngd to allocate tids for user specific commands. This also cleans up the existing code to use single place for tid allocations and free. This patch also make the tid allocation cyclic one, its very useful to track the transactions back during debug. Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

slimbus: core: add of_slim_device_get() helper

2018-07-07T15:24:32+00:00

On SLIMBus controllers like Qcom NGD(non ported device), controller can request logical address once the remote side is powered, having a helper function like this to explicitly enumerate the bus is helpful. Also codec drivers which are taking to interface device would need such a helper too. Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

slimbus: qcom: remove redundant depends in Kconfig

2018-07-07T15:23:12+00:00

QCOM SLIMBus controller is already under a 'if SLIMBUS' in Kconfig, having depends on SLIMBUS is totally redundant. Just remove it. Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

slimbus: messaging: initialize completion correctly

2018-07-07T15:23:12+00:00

slim_val_inf can contain random value from stack, make sure the completion is initialized to NULL while filling the msg. Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman