[0/6] interconnect: Introduce xlate_extended()

Message ID 20200723130942.28491-1-georgi.djakov@linaro.org
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  • interconnect: Introduce xlate_extended()
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Georgi Djakov July 23, 2020, 1:09 p.m.
Currently the interconnect framework provides the xlate() callback for
mapping the endpoints from phandle arguments in DT. This is implemented
by the provider drivers. But the endpoints (or the path between the
endpoints) might have an additional attributes, which should be parsed
and populated. During previous discussions [1], it was suggested that
adding more and more DT properties will not scale very well. So instead
of adding DT properties, such data should be put into the 'interconnects'
arguments.

This patchset is introducing a new xlate_extended() callback, which
would allow the interconnect provider drivers to parse additional data
(such as path tags) and allow the framework to make use of them.

Thanks to Sibi for the preliminary feedback and testing this patchset
on the sc7180 platform.

The patchset is based on linux-next (next-20200723).

[1]. https://lore.kernel.org/linux-devicetree/20200519185836.GA469006@bogus/

Georgi Djakov (4):
  interconnect: Introduce xlate_extended() callback
  interconnect: qcom: Implement xlate_extended() to parse tags
  interconnect: qcom: sdm845: Replace xlate with xlate_extended
  arm64: dts: qcom: sdm845: Increase the number of interconnect cells

Sibi Sankar (2):
  interconnect: qcom: sc7180: Replace xlate with xlate_extended
  arm64: dts: qcom: sc7180: Increase the number of interconnect cells

 arch/arm64/boot/dts/qcom/sc7180.dtsi  | 216 +++++++++++++-------------
 arch/arm64/boot/dts/qcom/sdm845.dtsi  |  44 +++---
 drivers/interconnect/core.c           |  73 ++++++---
 drivers/interconnect/qcom/icc-rpmh.c  |  27 ++++
 drivers/interconnect/qcom/icc-rpmh.h  |   1 +
 drivers/interconnect/qcom/sc7180.c    |   2 +-
 drivers/interconnect/qcom/sdm845.c    |   2 +-
 include/linux/interconnect-provider.h |  17 +-
 8 files changed, 225 insertions(+), 157 deletions(-)

Comments

Matthias Kaehlcke July 27, 2020, 8:58 p.m. | #1
On Thu, Jul 23, 2020 at 04:09:41PM +0300, Georgi Djakov wrote:
> From: Sibi Sankar <sibis@codeaurora.org>

> 

> Use the qcom_icc_xlate_extended() in order to parse tags, that are

> specified as an additional arguments to the path endpoints in DT.

> 

> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>

> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>


Tested-by: Matthias Kaehlcke <mka@chromium.org>

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>