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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 <baolin.wang7@gmail.com>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200622075956.171058-4-bjorn.andersson@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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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 <baolin.wang7@gmail.com>
Link: https://lore.kernel.org/r/d69ad8611a68b0cac3c927d19901f3c113c5435c.1578452735.git.baolin.wang7@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Since the hwspinlock core has changed the PM runtime to be optional, and
the Qualcomm hardware spinlock has no pm runtime requirement, thus remove
these redundant PM runtime functions.
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Link: https://lore.kernel.org/r/e0bb751feb7af709f92e52a07d0e8ebcf1ee44ff.1578452735.git.baolin.wang7@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Use the appropriate SPDX license identifier in the Qualcomm Hwspinlock
driver source file and drop the previous boilerplate license text.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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of_parse_phandle
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 <peter.chen@nxp.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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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 <bjorn.andersson@sonymobile.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
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Add driver for Qualcomm Hardware Mutex block found in many Qualcomm
SoCs.
Based on initial effort by Kumar Gala <galak@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Reviewed-by: Andy Gross <agross@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
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