kernel/linux.git/drivers/hwspinlock, branch v5.9.12

hwspinlock: qcom: Allow mmio usage in addition to syscon

2020-07-14T05:29:28+00:00

In modern Qualcomm platforms the mutex region of the TCSR is forked off into its own block, all with a offset of 0 and stride of 4096, and in some of these platforms no other registers in this region is accessed from Linux. So add support for directly memory mapping this register space, to avoid the need to represent this block using a syscon. Reviewed-by: Baolin Wang Reviewed-by: Vinod Koul Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/20200622075956.171058-4-bjorn.andersson@linaro.org Signed-off-by: Bjorn Andersson

hwspinlock: Simplify Kconfig

2020-06-21T07:36:03+00:00

Every hwspinlock driver is expected to depend on the hwspinlock core, so it's possible to simplify the Kconfig, factoring out the HWSPINLOCK dependency. Reviewed-by: Baolin Wang Signed-off-by: Ezequiel Garcia Link: https://lore.kernel.org/r/20200414220943.6203-1-ezequiel@collabora.com Signed-off-by: Bjorn Andersson

hwspinlock: hwspinlock_internal.h: Replace zero-length array with flexible-array member

2020-03-26T05:30:46+00:00

The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Reviewed-by: Baolin Wang Signed-off-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20200319213839.GA10669@embeddedor.com Signed-off-by: Bjorn Andersson

hwspinlock: Allow drivers to be built with COMPILE_TEST

2020-03-26T05:30:46+00:00

Allow drivers to be built with COMPILE_TEST. Signed-off-by: Baolin Wang Link: https://lore.kernel.org/r/5a95c3de07ef020a4e2f2776fa5adb00637ee387.1581324976.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson

hwspinlock: sirf: Use devm_hwspin_lock_register() to register hwlock controller

2020-01-22T00:16:36+00:00

Use devm_hwspin_lock_register() to register the hwlock controller instead of unregistering the hwlock controller explicitly when removing the device. Signed-off-by: Baolin Wang Link: https://lore.kernel.org/r/8f94e67b5f9af20a93418a2fc9cc71b194f1285c.1578453662.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson

hwspinlock: sirf: Remove redundant PM runtime functions

2020-01-22T00:16:30+00:00

Since the hwspinlock core has changed the PM runtime to be optional, and the SIRF hardware spinlock has no pm runtime requirement, thus remove these redundant PM runtime functions. Signed-off-by: Baolin Wang Link: https://lore.kernel.org/r/c921e391aa2a652d8d6ae0e4041202cec9d917e7.1578453662.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson

hwspinlock: sirf: Change to use devm_platform_ioremap_resource()

2020-01-22T00:16:16+00:00

Use the new helper that wraps the calls to platform_get_resource() and devm_ioremap_resource() together, which can simpify the code. Signed-off-by: Baolin Wang Link: https://lore.kernel.org/r/dfa043f317c609a6172468ac11598968dd751bce.1578453662.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson

hwspinlock: omap: Use devm_kzalloc() to allocate memory

2020-01-22T00:11:25+00:00

Use devm_kzalloc() to allocate memory, which can simplify the error handling. Signed-off-by: Baolin Wang Link: https://lore.kernel.org/r/c066ad704c1a5fd52c3002cac80ddd59b3901b01.1578453062.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson

hwspinlock: omap: Change to use devm_platform_ioremap_resource()

2020-01-22T00:11:11+00:00

Use the new helper that wraps the calls to platform_get_resource() and devm_ioremap_resource() together, which can simpify the code. Meanwhile renaming the error label to make more sense after removing iounmap(). Signed-off-by: Baolin Wang Link: https://lore.kernel.org/r/6c09c5034a7e68fdfc22d2cb5daa375bccb33a66.1578453062.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson

hwspinlock: qcom: Use devm_hwspin_lock_register() to register hwlock controller

2020-01-22T00:10:07+00:00

Use devm_hwspin_lock_register() to register the hwlock controller instead of unregistering the hwlock controller explicitly when removing the device. Signed-off-by: Baolin Wang Link: https://lore.kernel.org/r/d69ad8611a68b0cac3c927d19901f3c113c5435c.1578452735.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson