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On am335x, suspend and resume only works once, and the system hangs if suspend is attempted again. However, turns out suspend and resume works fine multiple times if the USB OTG driver for musb controller is loaded. The issue is caused my the interconnect target module losing context during suspend, and it needs a restore on resume to be reconfigure again as debugged earlier by Dave Gerlach <d-gerlach@ti.com>. There are also other modules that need a restore on resume, like gpmc as noted by Dave. So let's add a common way to restore an interconnect target module based on a quirk flag. For now, let's enable the quirk for am335x otg only to fix the suspend and resume issue. As gpmc is not causing hangs based on tests with BeagleBone, let's patch gpmc separately. For gpmc, we also need a hardware reset done before restore according to Dave. To reinit the modules, we decouple system suspend from PM runtime. We replace calls to pm_runtime_force_suspend() and pm_runtime_force_resume() with direct calls to internal functions and rely on the driver internal state. There no point trying to handle complex system suspend and resume quirks via PM runtime. This is issue should have already been noticed with commit |
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| .. | ||
| fsl-mc | ||
| mhi | ||
| arm-cci.c | ||
| arm-integrator-lm.c | ||
| brcmstb_gisb.c | ||
| bt1-apb.c | ||
| bt1-axi.c | ||
| da8xx-mstpri.c | ||
| hisi_lpc.c | ||
| imx-weim.c | ||
| Kconfig | ||
| Makefile | ||
| mips_cdmm.c | ||
| moxtet.c | ||
| mvebu-mbus.c | ||
| omap_l3_noc.c | ||
| omap_l3_noc.h | ||
| omap_l3_smx.c | ||
| omap_l3_smx.h | ||
| omap-ocp2scp.c | ||
| qcom-ebi2.c | ||
| simple-pm-bus.c | ||
| sun50i-de2.c | ||
| sunxi-rsb.c | ||
| tegra-aconnect.c | ||
| tegra-gmi.c | ||
| ti-pwmss.c | ||
| ti-sysc.c | ||
| ts-nbus.c | ||
| uniphier-system-bus.c | ||
| vexpress-config.c | ||