[RESEND,v4,0/2] drivers: bus: Add Freescale i.MX8qxp pixel link MSI bus support

Message

Liu Ying Oct. 17, 2022, 7:40 a.m. UTC

Hi,

This series aims to add Freescale i.MX8qxp pixel link MSI bus support
by using the existing simple-pm-bus driver. A power domain and two input
clocks need to be enabled before the MSI bus accesses it's child devices,
which matches what a simple power-managed bus is(See simple-pm-bus.yaml).

Patch 1 enables/disables functional clock(s) as a bulk in the
simple-pm-bus driver when the simple-pm-bus is being power managed,
since the MSI bus takes the two input clocks as functional clocks.

Patch 2 adds dt-bindings for the MSI bus.

v3->v4:
* Drop patch 1 in v3, because simple-bus/simple-mfd devices probed by the
  simple-pm-bus driver should not be child nodes of simple-pm-bus at all,
  as simple-bus/simple-mfd's child devices PM operations cannot be propagated
  to simple-pm-bus. Those simple-bus/simple-mfd devices needs dedicated drivers.
* Drop unnecessary 'bus == NULL' check from simple_pm_bus_runtime_{suspend,resume}.
  for patch 1 in v4. (Geert)
* Add Geert's R-b tag on patch 1 in v4.
* Add child nodes in the example MSI bus node of the MSI bus dt-binding. (Krzysztof)
* Resend v4 to imply this series is based on v6.0-rc1 so that there are not any
  dependencies for the MSI bus dt-binding. (Rob)
* Resend v4 based on v6.1-rc1. (Greg)
* Add Rob's R-b tag on patch 2 in v4.

v2->v3:
* Add a pattern property to allow child nodes in the MSI bus dt-binding. (Rob)

v1->v2:
Address Krzysztof's comments on patch 3:
* Add a select to explicitly select the MSI bus dt-binding.
* List 'simple-pm-bus' explicitly as one item of compatible strings.
* Require compatible and reg properties.
* Put reg property just after compatible property in example.

Liu Ying (2):
  drivers: bus: simple-pm-bus: Use clocks
  dt-bindings: bus: Add Freescale i.MX8qxp pixel link MSI bus binding

 .../bus/fsl,imx8qxp-pixel-link-msi-bus.yaml   | 232 ++++++++++++++++++
 drivers/bus/simple-pm-bus.c                   |  48 ++++
 2 files changed, 280 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/bus/fsl,imx8qxp-pixel-link-msi-bus.yaml

Comments

Liu Ying Oct. 31, 2022, 8:30 a.m. UTC | #1

On Mon, 2022-10-17 at 15:40 +0800, Liu Ying wrote:
> Hi,
> 
> This series aims to add Freescale i.MX8qxp pixel link MSI bus support
> by using the existing simple-pm-bus driver. A power domain and two input
> clocks need to be enabled before the MSI bus accesses it's child devices,
> which matches what a simple power-managed bus is(See simple-pm-bus.yaml).
> 
> Patch 1 enables/disables functional clock(s) as a bulk in the
> simple-pm-bus driver when the simple-pm-bus is being power managed,
> since the MSI bus takes the two input clocks as functional clocks.
> 
> Patch 2 adds dt-bindings for the MSI bus.
> 
> v3->v4:
> * Drop patch 1 in v3, because simple-bus/simple-mfd devices probed by the
>   simple-pm-bus driver should not be child nodes of simple-pm-bus at all,
>   as simple-bus/simple-mfd's child devices PM operations cannot be propagated
>   to simple-pm-bus. Those simple-bus/simple-mfd devices needs dedicated drivers.
> * Drop unnecessary 'bus == NULL' check from simple_pm_bus_runtime_{suspend,resume}.
>   for patch 1 in v4. (Geert)
> * Add Geert's R-b tag on patch 1 in v4.
> * Add child nodes in the example MSI bus node of the MSI bus dt-binding. (Krzysztof)
> * Resend v4 to imply this series is based on v6.0-rc1 so that there are not any
>   dependencies for the MSI bus dt-binding. (Rob)
> * Resend v4 based on v6.1-rc1. (Greg)
> * Add Rob's R-b tag on patch 2 in v4.
> 
> v2->v3:
> * Add a pattern property to allow child nodes in the MSI bus dt-binding. (Rob)
> 
> v1->v2:
> Address Krzysztof's comments on patch 3:
> * Add a select to explicitly select the MSI bus dt-binding.
> * List 'simple-pm-bus' explicitly as one item of compatible strings.
> * Require compatible and reg properties.
> * Put reg property just after compatible property in example.
> 
> Liu Ying (2):
>   drivers: bus: simple-pm-bus: Use clocks
>   dt-bindings: bus: Add Freescale i.MX8qxp pixel link MSI bus binding
> 
>  .../bus/fsl,imx8qxp-pixel-link-msi-bus.yaml   | 232 ++++++++++++++++++
>  drivers/bus/simple-pm-bus.c                   |  48 ++++
>  2 files changed, 280 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/bus/fsl,imx8qxp-pixel-link-msi-bus.yaml

Gentle ping...

If there is no more comments on this series, can someone pick it up
please?

Regards,
Liu Ying

Greg Kroah-Hartman Nov. 10, 2022, 6:01 p.m. UTC | #2

On Mon, Oct 31, 2022 at 04:30:57PM +0800, Liu Ying wrote:
> On Mon, 2022-10-17 at 15:40 +0800, Liu Ying wrote:
> > Hi,
> > 
> > This series aims to add Freescale i.MX8qxp pixel link MSI bus support
> > by using the existing simple-pm-bus driver. A power domain and two input
> > clocks need to be enabled before the MSI bus accesses it's child devices,
> > which matches what a simple power-managed bus is(See simple-pm-bus.yaml).
> > 
> > Patch 1 enables/disables functional clock(s) as a bulk in the
> > simple-pm-bus driver when the simple-pm-bus is being power managed,
> > since the MSI bus takes the two input clocks as functional clocks.
> > 
> > Patch 2 adds dt-bindings for the MSI bus.
> > 
> > v3->v4:
> > * Drop patch 1 in v3, because simple-bus/simple-mfd devices probed by the
> >   simple-pm-bus driver should not be child nodes of simple-pm-bus at all,
> >   as simple-bus/simple-mfd's child devices PM operations cannot be propagated
> >   to simple-pm-bus. Those simple-bus/simple-mfd devices needs dedicated drivers.
> > * Drop unnecessary 'bus == NULL' check from simple_pm_bus_runtime_{suspend,resume}.
> >   for patch 1 in v4. (Geert)
> > * Add Geert's R-b tag on patch 1 in v4.
> > * Add child nodes in the example MSI bus node of the MSI bus dt-binding. (Krzysztof)
> > * Resend v4 to imply this series is based on v6.0-rc1 so that there are not any
> >   dependencies for the MSI bus dt-binding. (Rob)
> > * Resend v4 based on v6.1-rc1. (Greg)
> > * Add Rob's R-b tag on patch 2 in v4.
> > 
> > v2->v3:
> > * Add a pattern property to allow child nodes in the MSI bus dt-binding. (Rob)
> > 
> > v1->v2:
> > Address Krzysztof's comments on patch 3:
> > * Add a select to explicitly select the MSI bus dt-binding.
> > * List 'simple-pm-bus' explicitly as one item of compatible strings.
> > * Require compatible and reg properties.
> > * Put reg property just after compatible property in example.
> > 
> > Liu Ying (2):
> >   drivers: bus: simple-pm-bus: Use clocks
> >   dt-bindings: bus: Add Freescale i.MX8qxp pixel link MSI bus binding
> > 
> >  .../bus/fsl,imx8qxp-pixel-link-msi-bus.yaml   | 232 ++++++++++++++++++
> >  drivers/bus/simple-pm-bus.c                   |  48 ++++
> >  2 files changed, 280 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/bus/fsl,imx8qxp-pixel-link-msi-bus.yaml
> 
> Gentle ping...
> 
> If there is no more comments on this series, can someone pick it up
> please?

I'll take it, thanks.

greg k-h