[PATCH 0/3] bus: Add support for Tegra210 ACONNECT

[PATCH 0/3] bus: Add support for Tegra210 ACONNECT

[Jon Hunter]

Add support for the ACONNECT bus which is part of the audio sub-system
on Tegra210.

I did look to see if we could use the simple-pm-bus infrastructure for
this, however, in the end I found that it did was not a good fit because
of the way clocks for the bus are handled. The simple-pm-bus is tightly
coupled to the genpd subsystem and is reliant on the power-domain
associated with the bus to have the flag GENPD_FLAG_PM_CLK set and uses
the genpd function pointer, attach_dev(), as a hook to populate the
clocks. For Tegra this does not work because the power-domains are
instantiated from device-tree rather than platform code. In this case
for Tegra it is simpler to keep the clock management of devices within
the power-domain separated from the power-domain itself.

Jon Hunter (2):
  dt-bindings: bus: Add documentation for Tegra210 ACONNECT
  bus: Add support for Tegra ACONNECT

Shardar Shariff Md (1):
  dmaengine: tegra-apb: proper default init of channel slave_id

 .../bindings/bus/nvidia,tegra210-aconnect.txt      |  45 ++++++++
 drivers/bus/Kconfig                                |   9 ++
 drivers/bus/Makefile                               |   1 +
 drivers/bus/tegra-aconnect.c                       | 113 +++++++++++++++++++++
 drivers/dma/tegra20-apb-dma.c                      |  16 ++-
 5 files changed, 182 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/bus/nvidia,tegra210-aconnect.txt
 create mode 100644 drivers/bus/tegra-aconnect.c

-- 
2.1.4

[PATCH 0/3] bus: Add support for Tegra210 ACONNECT

[Jon Hunter]

Add support for the ACONNECT bus which is part of the audio sub-system
on Tegra210.

I did look to see if we could use the simple-pm-bus infrastructure for
this, however, in the end I found that it did was not a good fit because
of the way clocks for the bus are handled. The simple-pm-bus is tightly
coupled to the genpd subsystem and is reliant on the power-domain
associated with the bus to have the flag GENPD_FLAG_PM_CLK set and uses
the genpd function pointer, attach_dev(), as a hook to populate the
clocks. For Tegra this does not work because the power-domains are
instantiated from device-tree rather than platform code. In this case
for Tegra it is simpler to keep the clock management of devices within
the power-domain separated from the power-domain itself.

Jon Hunter (2):
  dt-bindings: bus: Add documentation for Tegra210 ACONNECT
  bus: Add support for Tegra ACONNECT

Shardar Shariff Md (1):
  dmaengine: tegra-apb: proper default init of channel slave_id

 .../bindings/bus/nvidia,tegra210-aconnect.txt      |  45 ++++++++
 drivers/bus/Kconfig                                |   9 ++
 drivers/bus/Makefile                               |   1 +
 drivers/bus/tegra-aconnect.c                       | 113 +++++++++++++++++++++
 drivers/dma/tegra20-apb-dma.c                      |  16 ++-
 5 files changed, 182 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/bus/nvidia,tegra210-aconnect.txt
 create mode 100644 drivers/bus/tegra-aconnect.c

-- 
2.1.4

Re: [PATCH 0/3] bus: Add support for Tegra210 ACONNECT

[Jon Hunter]

Ignore this, I ballsed it up!

On 29/04/16 14:46, Jon Hunter wrote:
> Add support for the ACONNECT bus which is part of the audio sub-system
> on Tegra210.
> 
> I did look to see if we could use the simple-pm-bus infrastructure for
> this, however, in the end I found that it did was not a good fit because
> of the way clocks for the bus are handled. The simple-pm-bus is tightly
> coupled to the genpd subsystem and is reliant on the power-domain
> associated with the bus to have the flag GENPD_FLAG_PM_CLK set and uses
> the genpd function pointer, attach_dev(), as a hook to populate the
> clocks. For Tegra this does not work because the power-domains are
> instantiated from device-tree rather than platform code. In this case
> for Tegra it is simpler to keep the clock management of devices within
> the power-domain separated from the power-domain itself.
> 
> Jon Hunter (2):
>   dt-bindings: bus: Add documentation for Tegra210 ACONNECT
>   bus: Add support for Tegra ACONNECT
> 
> Shardar Shariff Md (1):
>   dmaengine: tegra-apb: proper default init of channel slave_id
> 
>  .../bindings/bus/nvidia,tegra210-aconnect.txt      |  45 ++++++++
>  drivers/bus/Kconfig                                |   9 ++
>  drivers/bus/Makefile                               |   1 +
>  drivers/bus/tegra-aconnect.c                       | 113 +++++++++++++++++++++
>  drivers/dma/tegra20-apb-dma.c                      |  16 ++-
>  5 files changed, 182 insertions(+), 2 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/bus/nvidia,tegra210-aconnect.txt
>  create mode 100644 drivers/bus/tegra-aconnect.c

Re: [PATCH 0/3] bus: Add support for Tegra210 ACONNECT

[Jon Hunter]

Ignore this, I ballsed it up!

On 29/04/16 14:46, Jon Hunter wrote:
> Add support for the ACONNECT bus which is part of the audio sub-system
> on Tegra210.
> 
> I did look to see if we could use the simple-pm-bus infrastructure for
> this, however, in the end I found that it did was not a good fit because
> of the way clocks for the bus are handled. The simple-pm-bus is tightly
> coupled to the genpd subsystem and is reliant on the power-domain
> associated with the bus to have the flag GENPD_FLAG_PM_CLK set and uses
> the genpd function pointer, attach_dev(), as a hook to populate the
> clocks. For Tegra this does not work because the power-domains are
> instantiated from device-tree rather than platform code. In this case
> for Tegra it is simpler to keep the clock management of devices within
> the power-domain separated from the power-domain itself.
> 
> Jon Hunter (2):
>   dt-bindings: bus: Add documentation for Tegra210 ACONNECT
>   bus: Add support for Tegra ACONNECT
> 
> Shardar Shariff Md (1):
>   dmaengine: tegra-apb: proper default init of channel slave_id
> 
>  .../bindings/bus/nvidia,tegra210-aconnect.txt      |  45 ++++++++
>  drivers/bus/Kconfig                                |   9 ++
>  drivers/bus/Makefile                               |   1 +
>  drivers/bus/tegra-aconnect.c                       | 113 +++++++++++++++++++++
>  drivers/dma/tegra20-apb-dma.c                      |  16 ++-
>  5 files changed, 182 insertions(+), 2 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/bus/nvidia,tegra210-aconnect.txt
>  create mode 100644 drivers/bus/tegra-aconnect.c

[PATCH 0/3] bus: Add support for Tegra210 ACONNECT

[Jon Hunter]

Add support for the ACONNECT bus which is part of the audio sub-system
on Tegra210.

I did look to see if we could use the simple-pm-bus infrastructure for
this, however, in the end I found that it did was not a good fit because
of the way clocks for the bus are handled. The simple-pm-bus is tightly
coupled to the genpd subsystem and is reliant on the power-domain
associated with the bus to have the flag GENPD_FLAG_PM_CLK set and uses
the genpd function pointer, attach_dev(), as a hook to populate the
clocks. For Tegra this does not work because the power-domains are
instantiated from device-tree rather than platform code. In this case
for Tegra it is simpler to keep the clock management of devices within
the power-domain separated from the power-domain itself.

Jon Hunter (3):
  dt-bindings: bus: Add documentation for Tegra210 ACONNECT
  bus: Add support for Tegra ACONNECT
  arm64: tegra: Add ACONNECT bus node for Tegra210

 .../bindings/bus/nvidia,tegra210-aconnect.txt      |  45 ++++++++
 arch/arm64/boot/dts/nvidia/tegra210.dtsi           |  12 +++
 drivers/bus/Kconfig                                |   9 ++
 drivers/bus/Makefile                               |   1 +
 drivers/bus/tegra-aconnect.c                       | 113 +++++++++++++++++++++
 5 files changed, 180 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/bus/nvidia,tegra210-aconnect.txt
 create mode 100644 drivers/bus/tegra-aconnect.c

-- 
2.1.4

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[PATCH 0/3] bus: Add support for Tegra210 ACONNECT

[Jon Hunter]

Add support for the ACONNECT bus which is part of the audio sub-system
on Tegra210.

I did look to see if we could use the simple-pm-bus infrastructure for
this, however, in the end I found that it did was not a good fit because
of the way clocks for the bus are handled. The simple-pm-bus is tightly
coupled to the genpd subsystem and is reliant on the power-domain
associated with the bus to have the flag GENPD_FLAG_PM_CLK set and uses
the genpd function pointer, attach_dev(), as a hook to populate the
clocks. For Tegra this does not work because the power-domains are
instantiated from device-tree rather than platform code. In this case
for Tegra it is simpler to keep the clock management of devices within
the power-domain separated from the power-domain itself.

Jon Hunter (3):
  dt-bindings: bus: Add documentation for Tegra210 ACONNECT
  bus: Add support for Tegra ACONNECT
  arm64: tegra: Add ACONNECT bus node for Tegra210

 .../bindings/bus/nvidia,tegra210-aconnect.txt      |  45 ++++++++
 arch/arm64/boot/dts/nvidia/tegra210.dtsi           |  12 +++
 drivers/bus/Kconfig                                |   9 ++
 drivers/bus/Makefile                               |   1 +
 drivers/bus/tegra-aconnect.c                       | 113 +++++++++++++++++++++
 5 files changed, 180 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/bus/nvidia,tegra210-aconnect.txt
 create mode 100644 drivers/bus/tegra-aconnect.c

-- 
2.1.4