talos-obmc-linux/drivers/hwspinlock, branch dev-4.13

hwspinlock: sprd: Add hardware spinlock driver

2017-05-17T17:52:52+00:00

The Spreadtrum hardware spinlock device can provide hardware assistance for synchronization between the multiple subsystems. Signed-off-by: Baolin Wang Signed-off-by: Bjorn Andersson

Make HWSPINLOCK a menuconfig to ease disabling

2017-05-17T17:32:14+00:00

So that there's no need to get into the submenu to disable all related config entries. Signed-off-by: Vincent Legoll Signed-off-by: Bjorn Andersson

hwspinlock: qcom_hwspinlock: add missing of_node_put after calling of_parse_phandle

2016-07-06T19:20:34+00:00

of_node_put needs to be called when the device node which is got from of_parse_phandle has finished using. Cc: linux-arm-kernel@lists.infradead.org Cc: linux-arm-msm@vger.kernel.org Signed-off-by: Peter Chen Signed-off-by: Bjorn Andersson

drivers/hwspinlock: use correct radix tree API

2016-05-21T00:58:30+00:00

radix_tree_is_indirect_ptr() is an internal API. The correct call to use is radix_tree_deref_retry() which has the appropriate unlikely() annotation. Fixes: c6400ba7e13a ("drivers/hwspinlock: fix race between radix tree insertion and lookup") Signed-off-by: Matthew Wilcox Cc: Konstantin Khlebnikov Cc: Kirill Shutemov Cc: Jan Kara Cc: Neil Brown Cc: Ross Zwisler Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

drivers/hwspinlock: fix race between radix tree insertion and lookup

2016-02-03T16:28:43+00:00

of_hwspin_lock_get_id() is protected by the RCU lock, which means that insertions can occur simultaneously with the lookup. If the radix tree transitions from a height of 0, we can see a slot with the indirect_ptr bit set, which will cause us to at least read random memory, and could cause other havoc. Fix this by using the newly introduced radix_tree_iter_retry(). Signed-off-by: Matthew Wilcox Cc: Hugh Dickins Cc: Ohad Ben-Cohen Cc: Konstantin Khlebnikov Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

hwspinlock: qcom: Correct msb in regmap_field

2015-07-01T13:15:05+00:00

msb of the regmap_field was mistakenly given the value 32, to set all bits in the regmap update mask; although incorrect this worked until 921cc294, where the mask calculation was corrected. Signed-off-by: Bjorn Andersson Signed-off-by: Ohad Ben-Cohen

hwspinlock: add a CSR atlas7 driver

2015-06-12T07:44:06+00:00

Add hwspinlock support for the CSR atlas7 SoC. The Hardware Spinlock device on atlas7 provides hardware assistance for synchronization between the multiple processors in the system (dual Cortex-A7, CAN bus Cortex-M3 and audio DSP). Reviewed-by: Suman Anna Reviewed-by: Bjorn Andersson Signed-off-by: Wei Chen Signed-off-by: Barry Song Signed-off-by: Ohad Ben-Cohen

hwspinlock: qcom: Add support for Qualcomm HW Mutex block

2015-05-02T07:19:17+00:00

Add driver for Qualcomm Hardware Mutex block found in many Qualcomm SoCs. Based on initial effort by Kumar Gala Signed-off-by: Bjorn Andersson Reviewed-by: Andy Gross Reviewed-by: Jeffrey Hugo Signed-off-by: Ohad Ben-Cohen

hwspinlock/omap: add support for dt nodes

2015-05-02T07:05:10+00:00

HwSpinlock IP is present only on OMAP4 and other newer SoCs, which are all device-tree boot only. This patch adds the base support for parsing the DT nodes, and removes the code dealing with the traditional platform device instantiation. Signed-off-by: Suman Anna [tony@atomide.com: ack for legacy file removal] Acked-by: Tony Lindgren [comment on the imperfect always-zero base_id] Signed-off-by: Ohad Ben-Cohen

hwspinlock/core: add device tree support

2015-05-02T06:54:30+00:00

This patch adds a new OF-friendly API of_hwspin_lock_get_id() for hwspinlock clients to use/request locks from a hwspinlock device instantiated through a device-tree blob. This new API can be used by hwspinlock clients to get the id for a specific lock using the phandle + args specifier, so that it can be requested using the available hwspin_lock_request_specific() API. Signed-off-by: Suman Anna Reviewed-by: Bjorn Andersson [small comment clarification] Signed-off-by: Ohad Ben-Cohen