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1109b97b61
Existing felix DSA drivers (vsc9959, vsc9953) are all switches that were integrated in NXP SoCs, which makes them a bit unusual compared to the usual Microchip branded Ocelot switches. To be precise, looking at Documentation/devicetree/bindings/net/mscc,vsc7514-switch.yaml, one can see 21 memory regions for the "switch" node, and these correspond to the "targets" of the switch IP, which are spread throughout the guts of that SoC's memory space. In NXP integrations, those targets still exist, but they were condensed within a single memory region, with no other peripheral in between them, so it made more sense for the driver to ioremap the entire memory space of the switch, and then find the targets within that memory space via some offsets hardcoded in the driver. The effect of this design decision is that now, the felix driver expects hardware instantiations to provide their own resource definitions, which is kind of odd when considering a typical device (those are retrieved from 'reg' properties in the device tree, using platform_get_resource() or similar). Allow other hardware instantiations that share the felix driver to not provide a hardcoded array of resources in the future. Instead, make the common denominator based on which regmaps are created be just the resource "names". Each instantiation comes with its own array of names that are mandatory for it, and with an optional array of resources. So we split the resources in 2 arrays, one is what's requested and the other is what's provided. There is one pool of provided resources, in felix->info->resources (of length felix->info->num_resources). There are 2 different ways of requesting a resource. One is by enum ocelot_target (this handles the global regmaps), and one is by int port (this handles the per-port ones). For the existing vsc9959 and vsc9953, it would be a bit stupid to request something that's not provided, given that the 2 arrays are both defined in the same place. The advantage is that we can now modify felix_request_regmap_by_name() to make felix->info->resources[] optional, and if absent, the implementation can call dev_get_regmap() and this is something that is compatible with MFD. Co-developed-by: Colin Foster <colin.foster@in-advantage.com> Signed-off-by: Colin Foster <colin.foster@in-advantage.com> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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| .. | ||
| felix.c | ||
| felix.h | ||
| felix_vsc9959.c | ||
| Kconfig | ||
| Makefile | ||
| seville_vsc9953.c | ||