Laurentiu Palcu c1dead8bb3 clk: imx95-blk-ctl: Fix synchronous abort ...

[ Upstream commit b08217a257 ]

When enabling runtime PM for clock suppliers that also belong to a power
domain, the following crash is thrown:
error: synchronous external abort: 0000000096000010 [#1] PREEMPT SMP
Workqueue: events_unbound deferred_probe_work_func
pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : clk_mux_get_parent+0x60/0x90
lr : clk_core_reparent_orphans_nolock+0x58/0xd8
  Call trace:
   clk_mux_get_parent+0x60/0x90
   clk_core_reparent_orphans_nolock+0x58/0xd8
   of_clk_add_hw_provider.part.0+0x90/0x100
   of_clk_add_hw_provider+0x1c/0x38
   imx95_bc_probe+0x2e0/0x3f0
   platform_probe+0x70/0xd8

Enabling runtime PM without explicitly resuming the device caused
the power domain cut off after clk_register() is called. As a result,
a crash happens when the clock hardware provider is added and attempts
to access the BLK_CTL register.

Fix this by using devm_pm_runtime_enable() instead of pm_runtime_enable()
and getting rid of the pm_runtime_disable() in the cleanup path.

Fixes: 5224b18946 ("clk: imx: add i.MX95 BLK CTL clk driver")
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20250707-imx95-blk-ctl-7-1-v3-2-c1b676ec13be@nxp.com
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-08-15 12:13:56 +02:00

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clk-busy.c

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clk-composite-7ulp.c

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clk-composite-8m.c

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clk-composite-93.c

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clk-cpu.c

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clk-divider-gate.c

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clk-fixup-div.c

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clk-fixup-mux.c

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clk-frac-pll.c

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clk-fracn-gppll.c

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clk-gate2.c

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clk-gate-93.c

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clk-gate-exclusive.c

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clk-gpr-mux.c

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clk-imx1.c

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clk-imx5.c

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clk-imx6q.c

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clk-imx6sl.c

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clk-imx6sll.c

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clk-imx6sx.c

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clk-imx6ul.c

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clk-imx7d.c

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clk-imx7ulp.c

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clk-imx8-acm.c

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clk-imx8dxl-rsrc.c

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clk-imx8mm.c

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clk-imx8mn.c

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clk-imx8mp-audiomix.c

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clk-imx8mp.c

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clk-imx8mq.c

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clk-imx8qm-rsrc.c

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clk-imx8qxp-lpcg.c

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clk-imx8qxp-lpcg.h

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clk-imx8qxp-rsrc.c

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clk-imx8qxp.c

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clk-imx8ulp.c

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clk-imx25.c

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clk-imx27.c

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clk-imx31.c

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clk-imx35.c

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clk-imx93.c

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clk-imx95-blk-ctl.c

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clk-imxrt1050.c

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clk-lpcg-scu.c

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clk-pfd.c

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clk-pfdv2.c

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clk-pll14xx.c

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clk-pllv1.c

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clk-pllv2.c

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clk-pllv3.c

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clk-pllv4.c

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clk-scu.c

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clk-scu.h

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clk-sscg-pll.c

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clk-vf610.c

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clk.c

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clk.h

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Kconfig

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Makefile

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