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bus: ti-sysc: Handle some devices in omap_device compatible way

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Now that ti-sysc can manage child devices, we must also be backwards
compatible with the current omap_device code. With omap_device, we
assume that the child device manages the interconnect target module
directly.

The drivers needing special handling are the ones that still set
pm_runtime_irq_safe(). In the long run we want to update those drivers
as otherwise they will cause problems with genpd as a permanent PM
runtime usage count is set on the parent device.

We can handle omap_device these devices by improving the ti-sysc quirk
handling to detect the devices needing special handling based on
register map and revision register if usable. We also need to implement
dev_pm_domain for these child devices just like omap_device does.

Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2018-02-22 14:03:48 -08:00
parent ef70b0bdea
commit a885f0fe20
2 changed files with 224 additions and 3 deletions
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1
include/linux/platform_data/ti-sysc.h
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@ -45,6 +45,7 @@ struct sysc_regbits {
s8 emufree_shift;
};
#define SYSC_QUIRK_LEGACY_IDLE BIT(8)
#define SYSC_QUIRK_RESET_STATUS BIT(7)
#define SYSC_QUIRK_NO_IDLE_ON_INIT BIT(6)
#define SYSC_QUIRK_NO_RESET_ON_INIT BIT(5)