hwspinlock: qcom: Remove IPQ6018 SOC specific compatible

IPQ6018 has 32 tcsr_mutex hwlock registers with stride 0x1000.
The compatible string qcom,ipq6018-tcsr-mutex is mapped to
of_msm8226_tcsr_mutex which has 32 locks configured with stride of 0x80
and doesn't match the HW present in IPQ6018.

Remove IPQ6018 specific compatible string so that it fallsback to
of_tcsr_mutex data which maps to the correct configuration for IPQ6018.

Fixes: 5d4753f741d8 ("hwspinlock: qcom: add support for MMIO on older SoCs")
Signed-off-by: Vignesh Viswanathan <quic_viswanat@quicinc.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230905095535.1263113-3-quic_viswanat@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

hwspinlock: qcom: add missing regmap config for SFPB MMIO implementation

Commit 5d4753f741d8 ("hwspinlock: qcom: add support for MMIO on older
SoCs") introduced and made regmap_config mandatory in the of_data struct
but didn't add the regmap_config for sfpb based devices.

SFPB based devices can both use the legacy syscon way to probe or the
new MMIO way and currently device that use the MMIO way are broken as
they lack the definition of the now required regmap_config and always
return -EINVAL (and indirectly makes fail probing everything that
depends on it, smem, nandc with smem-parser...)

Fix this by correctly adding the missing regmap_config and restore
function of hwspinlock on SFPB based devices with MMIO implementation.

Cc: stable@vger.kernel.org
Fixes: 5d4753f741d8 ("hwspinlock: qcom: add support for MMIO on older SoCs")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Link: https://lore.kernel.org/r/20230716022804.21239-1-ansuelsmth@gmail.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

hwspinlock: add a check of devm_regmap_field_alloc in qcom_hwspinlock_probe

devm_regmap_field_alloc may fails, priv field might be error pointer and
cause illegal address access later.

Signed-off-by: Kang Chen <void0red@gmail.com>
Link: https://lore.kernel.org/r/20230227004116.1273988-1-void0red@gmail.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

hwspinlock: qcom: add support for MMIO on older SoCs

Older Qualcomm SoCs have TCSR mutex registers with 0x80 stride, instead
of 0x1000. Add dedicated compatibles and regmap for such case.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220909092035.223915-5-krzysztof.kozlowski@linaro.org

hwspinlock: qcom: correct MMIO max register for newer SoCs

Newer ARMv8 Qualcomm SoCs using 0x1000 register stride have maximum
register 0x20000 (32 mutexes * 0x1000).

Fixes: 7a1e6fb1c606 ("hwspinlock: qcom: Allow mmio usage in addition to syscon")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220909092035.223915-4-krzysztof.kozlowski@linaro.org

hwspinlock: qcom: Add support for mmio usage to sfpb-mutex

Allow sfpb-mutex to use mmio in addition to syscon.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220707102040.1859-1-ansuelsmth@gmail.com

hwspinlock: qcom: Allow mmio usage in addition to syscon

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>

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

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>

hwspinlock: qcom: Remove redundant PM runtime functions

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>

hwspinlock: qcom: Switch to SPDX license identifier

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>

hwspinlock: qcom_hwspinlock: add missing of_node_put after calling 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>

hwspinlock: qcom: Correct msb in regmap_field

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>

hwspinlock: qcom: Add support for Qualcomm HW Mutex block

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>