> -----Original Message-----
> From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>
> Sent: Thursday, August 13, 2020 1:36 PM
> To: Ben Levinsky <BLEVINSK@xxxxxxxxxx>
> Cc: Stefano Stabellini <stefanos@xxxxxxxxxx>; Michal Simek
> <michals@xxxxxxxxxx>; devicetree@xxxxxxxxxxxxxxx;
> mathieu.poirier@xxxxxxxxxx; Ed T. Mooring <emooring@xxxxxxxxxx>; linux-
> remoteproc@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> robh+dt@xxxxxxxxxx; Jiaying Liang <jliang@xxxxxxxxxx>; linux-arm-
> kernel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [PATCH v8 2/5] firmware: xilinx: Add shutdown/wakeup APIs
>
> On Mon, 10 Aug 2020, Ben Levinsky wrote:
> > Add shutdown/wakeup a resource eemi operations to shutdown
> > or bringup a resource.
> >
> > Signed-off-by: Ben Levinsky <ben.levinsky@xxxxxxxxxx>
> > ---
> > v3:
> > - add xilinx-related platform mgmt fn's instead of wrapping around
> > function pointer in xilinx eemi ops struct
> > - fix formatting
> > v4:
> > - add default values for enumv3:
> > - add xilinx-related platform mgmt fn's instead of wrapping around
> > function pointer in xilinx eemi ops struct
> > - fix formatting
> > v4:
> > - add default values for enum
> > ---
> > drivers/firmware/xilinx/zynqmp.c | 35 ++++++++++++++++++++++++++++
> > include/linux/firmware/xlnx-zynqmp.h | 22 +++++++++++++++++
> > 2 files changed, 57 insertions(+)
> >
> > diff --git a/drivers/firmware/xilinx/zynqmp.c
> b/drivers/firmware/xilinx/zynqmp.c
> > index 8d1ff2454e2e..f1a0bd35deeb 100644
> > --- a/drivers/firmware/xilinx/zynqmp.c
> > +++ b/drivers/firmware/xilinx/zynqmp.c
> > @@ -846,6 +846,41 @@ int zynqmp_pm_release_node(const u32 node)
> > }
> > EXPORT_SYMBOL_GPL(zynqmp_pm_release_node);
> >
> > +/**
> > + * zynqmp_pm_force_powerdown - PM call to request for another PU or
> subsystem to
> > + * be powered down forcefully
> > + * @target: Node ID of the targeted PU or subsystem
> > + * @ack: Flag to specify whether acknowledge is requested
> > + *
> > + * Return: status, either success or error+reason
> > + */
> > +int zynqmp_pm_force_powerdown(const u32 target,
>
> If the target is really the node id, why not calling it "node", the same
> way as below?
[Ben Levinsky] good point. Will change to "target" in v9
>
>
> > + const enum zynqmp_pm_request_ack ack)
> > +{
> > + return zynqmp_pm_invoke_fn(PM_FORCE_POWERDOWN, target, ack,
> 0, 0, NULL);
> > +}
> > +EXPORT_SYMBOL_GPL(zynqmp_pm_force_powerdown);
> > +
> > +/**
> > + * zynqmp_pm_request_wakeup - PM call to wake up selected master or
> subsystem
> > + * @node: Node ID of the master or subsystem
> > + * @set_addr: Specifies whether the address argument is relevant
> > + * @address: Address from which to resume when woken up
> > + * @ack: Flag to specify whether acknowledge requested
> > + *
> > + * Return: status, either success or error+reason
> > + */
> > +int zynqmp_pm_request_wakeup(const u32 node,
> > + const bool set_addr,
> > + const u64 address,
> > + const enum zynqmp_pm_request_ack ack)
> > +{
> > + /* set_addr flag is encoded into 1st bit of address */
> > + return zynqmp_pm_invoke_fn(PM_REQUEST_WAKEUP, node, address
> | set_addr,
> > + address >> 32, ack, NULL);
> > +}
> > +EXPORT_SYMBOL_GPL(zynqmp_pm_request_wakeup);
> > +
> > /**
> > * zynqmp_pm_set_requirement() - PM call to set requirement for PM
> slaves
> > * @node: Node ID of the slave
> > diff --git a/include/linux/firmware/xlnx-zynqmp.h
> b/include/linux/firmware/xlnx-zynqmp.h
> > index bb347dfe4ba4..4d83a7d69c4c 100644
> > --- a/include/linux/firmware/xlnx-zynqmp.h
> > +++ b/include/linux/firmware/xlnx-zynqmp.h
> > @@ -64,6 +64,8 @@
> >
> > enum pm_api_id {
> > PM_GET_API_VERSION = 1,
> > + PM_FORCE_POWERDOWN = 8,
> > + PM_REQUEST_WAKEUP = 10,
> > PM_SYSTEM_SHUTDOWN = 12,
> > PM_REQUEST_NODE = 13,
> > PM_RELEASE_NODE,
> > @@ -376,6 +378,12 @@ int zynqmp_pm_write_pggs(u32 index, u32 value);
> > int zynqmp_pm_read_pggs(u32 index, u32 *value);
> > int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype);
> > int zynqmp_pm_set_boot_health_status(u32 value);
> > +int zynqmp_pm_force_powerdown(const u32 target,
> > + const enum zynqmp_pm_request_ack ack);
> > +int zynqmp_pm_request_wakeup(const u32 node,
> > + const bool set_addr,
> > + const u64 address,
> > + const enum zynqmp_pm_request_ack ack);
> > #else
> > static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
> > {
> > @@ -526,6 +534,20 @@ static inline int
> zynqmp_pm_set_boot_health_status(u32 value)
> > {
> > return -ENODEV;
> > }
> > +
> > +static inline int zynqmp_pm_force_powerdown(const u32 target,
> > + const enum zynqmp_pm_request_ack ack)
> > +{
> > + return -ENODEV;
> > +}
> > +
> > +static inline int zynqmp_pm_request_wakeup(const u32 node,
> > + const bool set_addr,
> > + const u64 address,
> > + const enum zynqmp_pm_request_ack ack)
>
> code style
>
[Ben Levinsky] will fix this in v9
>
> > +{
> > + return -ENODEV;
> > +}
> > #endif
> >
> > #endif /* __FIRMWARE_ZYNQMP_H__ */
> > --
> > 2.17.1
> >
> >
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> >
