Messages in this thread |  | | Subject | Re: [PATCH v3 1/3] memory: tegra: Add devm_tegra_get_memory_controller() | From | Dmitry Osipenko <> | Date | Wed, 30 Sep 2020 18:27:00 +0300 |
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30.09.2020 18:23, Thierry Reding пишет: > On Wed, Sep 30, 2020 at 01:42:56AM -0700, Nicolin Chen wrote: >> From: Dmitry Osipenko <digetx@gmail.com> >> >> Multiple Tegra drivers need to retrieve Memory Controller and hence there >> is quite some duplication of the retrieval code among the drivers. Let's >> add a new common helper for the retrieval of the MC. >> >> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> >> Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> >> --- >> >> Changelog >> v2->v3: >> * Replaced with Dimtry's devm_tegra_get_memory_controller() >> v1->v2: >> * N/A >> >> drivers/memory/tegra/mc.c | 39 +++++++++++++++++++++++++++++++++++++++ >> include/soc/tegra/mc.h | 17 +++++++++++++++++ >> 2 files changed, 56 insertions(+) > > Let's not add this helper, please. If a device needs a reference to the > memory controller, it should have a phandle to the memory controller in > device tree so that it can be looked up explicitly. > > Adding this helper is officially sanctioning that it's okay not to have > that reference and that's a bad idea.
Maybe that's because the reference isn't really needed for the lookup? :)
Secondly, we could use the reference and then fall back to the of-matching for devices that don't have the reference, like all Tegra20 devices + Tegra30/124 ACTMON devices.
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