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SubjectRe: [PATCH v10 4/6] firmware: xilinx: Add shutdown/wakeup APIs
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On 10/11/22 23:24, Tanmay Shah wrote:
> From: Ben Levinsky <ben.levinsky@amd.com>
>
> Add shutdown/wakeup a resource eemi operations to shutdown
> or bringup a resource.
>
> Note alignment of args matches convention of other fn's in this file.
> The reason being that the long fn name results in aligned args that
> otherwise go over 80 chars so shift right to avoid this
>
> Signed-off-by: Ben Levinsky <ben.levinsky@amd.com>
> Signed-off-by: Tanmay Shah <tanmay.shah@amd.com>
> ---
>
> Changes in v10:
> - None
>
> Changes in v9:
> - None
>
> Changes in v8:
> - None
>
> Changes in v7:
> - None
>
> Changes in v6:
> - None
>
> Changes in v5:
> - None
>
> Changes in v4:
> - None
>
> Changes in v3:
> - None
>
> drivers/firmware/xilinx/zynqmp.c | 35 ++++++++++++++++++++++++++++
> include/linux/firmware/xlnx-zynqmp.h | 23 ++++++++++++++++++
> 2 files changed, 58 insertions(+)
>
> diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
> index d1f652802181..edb13167170f 100644
> --- a/drivers/firmware/xilinx/zynqmp.c
> +++ b/drivers/firmware/xilinx/zynqmp.c
> @@ -1159,6 +1159,41 @@ int zynqmp_pm_release_node(const u32 node)
> }
> EXPORT_SYMBOL_GPL(zynqmp_pm_release_node);
>
> +/**
> + * zynqmp_pm_force_pwrdwn - PM call to request for another PU or subsystem to
> + * be powered down forcefully
> + * @node: 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_pwrdwn(const u32 node,
> + const enum zynqmp_pm_request_ack ack)
> +{
> + return zynqmp_pm_invoke_fn(PM_FORCE_POWERDOWN, node, ack, 0, 0, NULL);
> +}
> +EXPORT_SYMBOL_GPL(zynqmp_pm_force_pwrdwn);
> +
> +/**
> + * zynqmp_pm_request_wake - 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_wake(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_wake);
> +
> /**
> * 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 e00a25aa2c17..d52f8413b892 100644
> --- a/include/linux/firmware/xlnx-zynqmp.h
> +++ b/include/linux/firmware/xlnx-zynqmp.h
> @@ -12,6 +12,7 @@
>
> #ifndef __FIRMWARE_ZYNQMP_H__
> #define __FIRMWARE_ZYNQMP_H__
> +#include <linux/types.h>
>
> #include <linux/err.h>
>
> @@ -87,6 +88,8 @@ enum pm_api_cb_id {
> enum pm_api_id {
> PM_GET_API_VERSION = 1,
> PM_REGISTER_NOTIFIER = 5,
> + PM_FORCE_POWERDOWN = 8,
> + PM_REQUEST_WAKEUP = 10,
> PM_SYSTEM_SHUTDOWN = 12,
> PM_REQUEST_NODE = 13,
> PM_RELEASE_NODE = 14,
> @@ -494,6 +497,12 @@ int zynqmp_pm_is_function_supported(const u32 api_id, const u32 id);
> int zynqmp_pm_set_feature_config(enum pm_feature_config_id id, u32 value);
> int zynqmp_pm_get_feature_config(enum pm_feature_config_id id, u32 *payload);
> int zynqmp_pm_register_sgi(u32 sgi_num, u32 reset);
> +int zynqmp_pm_force_pwrdwn(const u32 target,
> + const enum zynqmp_pm_request_ack ack);
> +int zynqmp_pm_request_wake(const u32 node,
> + const bool set_addr,
> + const u64 address,
> + const enum zynqmp_pm_request_ack ack);
> #else
> static inline int zynqmp_pm_get_api_version(u32 *version)
> {
> @@ -764,6 +773,20 @@ static inline int zynqmp_pm_register_sgi(u32 sgi_num, u32 reset)
> {
> return -ENODEV;
> }
> +
> +static inline int zynqmp_pm_force_pwrdwn(const u32 target,
> + const enum zynqmp_pm_request_ack ack)
> +{
> + return -ENODEV;
> +}
> +
> +static inline int zynqmp_pm_request_wake(const u32 node,
> + const bool set_addr,
> + const u64 address,
> + const enum zynqmp_pm_request_ack ack)
> +{
> + return -ENODEV;
> +}
> #endif
>
> #endif /* __FIRMWARE_ZYNQMP_H__ */


Acked-by: Michal Simek <michal.simek@amd.com>

M

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