linux/drivers/hwspinlock, branch v5.4

hwspinlock: add the 'in_atomic' API

2019-06-30T04:08:14Z

Add the 'in_atomic' mode which can be called from an atomic context. This mode relies on the existing 'raw' mode (no lock, no preemption/irq disabling) with the difference that the timeout is not based on jiffies (jiffies won't increase when irq are disabled) but handled with busy-waiting udelay() calls. Signed-off-by: Fabien Dessenne Signed-off-by: Bjorn Andersson

hwspinlock: stm32: implement the relax() ops

2019-06-30T04:04:24Z

Implement this optional ops, called by hwspinlock core while spinning on a lock, between two successive invocations of trylock(). Reviewed-by: Benjamin Gaignard Signed-off-by: Fabien Dessenne Signed-off-by: Bjorn Andersson

hwspinlock: ignore disabled device

2019-06-29T19:05:06Z

Do not wait for hwspinlock device registration if it is not available for use. Acked-by: Suman Anna Signed-off-by: Fabien Dessenne Signed-off-by: Bjorn Andersson

hwspinlock/omap: Add a trace during probe

2019-06-29T18:40:06Z

Add a debug level trace statement in the OMAP HwSpinlock driver probe function to print the number of hwlocks on a successful registration. Signed-off-by: Suman Anna Signed-off-by: Bjorn Andersson

hwspinlock/omap: Add support for TI K3 SoCs

2019-06-29T18:40:04Z

A HwSpinlock IP is also present on the newer TI K3 AM65x and J721E family of SoCs within the Main NavSS sub-module. Reuse the existing OMAP Hwspinlock driver to extend the support for this IP on K3 AM65x SoCs as well. The IP has slightly different bit-fields in the SYSCONFIG and SYSSTATUS registers. Signed-off-by: Suman Anna Signed-off-by: Bjorn Andersson

hwspinlock: fix return value check in stm32_hwspinlock_probe()

2019-01-03T19:42:10Z

In case of error, the function devm_ioremap_resource() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Fixes: f24fcff1d267 ("hwspinlock: add STM32 hwspinlock device") Acked-by: Benjamin Gaignard Signed-off-by: Wei Yongjun Signed-off-by: Bjorn Andersson

hwspinlock: add STM32 hwspinlock device

2018-12-05T20:45:21Z

This patch adds support of hardware semaphores for stm32mp1 SoC. The hardware block provides 32 semaphores. Signed-off-by: Benjamin Gaignard Signed-off-by: Benjamin Gaignard Signed-off-by: Bjorn Andersson

hwspinlock: Fix incorrect return pointers

2018-07-31T03:54:51Z

The commit 4f1acd758b08 ("hwspinlock: Add devm_xxx() APIs to request/free hwlock") introduces one bug, that will return one error pointer if failed to request one hwlock, but we expect NULL pointer on error for consumers. This patch will fix this issue. Reported-by: Dan Carpenter Signed-off-by: Baolin Wang Signed-off-by: Bjorn Andersson

hwspinlock: Fix one comment mistake

2018-06-26T20:46:34Z

Fix one comment mistake with correct function names. Signed-off-by: Baolin Wang Signed-off-by: Bjorn Andersson

hwspinlock: Add devm_xxx() APIs to register/unregister one hwlock controller

2018-06-26T20:46:23Z

This patch introduces devm_hwspin_lock_register() and devm_hwspin_lock_unregister() interfaces to help to register or unregister one hardware spinlock controller, that will help to simplify the cleanup code for hwspinlock drivers. Signed-off-by: Baolin Wang Signed-off-by: Bjorn Andersson