Commit fdd2ed88 authored by Rajan Vaja's avatar Rajan Vaja Committed by Greg Kroah-Hartman
Browse files

firmware: xilinx: Add system shutdown API interface 



Add system shutdown API interface which asks firmware to
perform system shutdown/restart.

Signed-off-by: default avatarRajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: default avatarMichal Simek <michal.simek@xilinx.com>
Signed-off-by: default avatarJolly Shah <jolly.shah@xilinx.com>
Link: https://lore.kernel.org/r/1587761887-4279-24-git-send-email-jolly.shah@xilinx.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ae5c961d

drivers/firmware/xilinx/zynqmp.c

+13 −0
Original line number Diff line number Diff line
@@ -875,6 +875,19 @@ int zynqmp_pm_aes_engine(const u64 address, u32 *out) 
}

EXPORT_SYMBOL_GPL(zynqmp_pm_aes_engine);



/**

 * zynqmp_pm_system_shutdown - PM call to request a system shutdown or restart

 * @type:	Shutdown or restart? 0 for shutdown, 1 for restart

 * @subtype:	Specifies which system should be restarted or shut down

 *

 * Return:	Returns status, either success or error+reason

 */

int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype)

{

	return zynqmp_pm_invoke_fn(PM_SYSTEM_SHUTDOWN, type, subtype,

				   0, 0, NULL);

}



static ssize_t ggs_show(struct device *device,

			struct device_attribute *attr,

			char *buf,

include/linux/firmware/xlnx-zynqmp.h

+6 −0
Original line number Diff line number Diff line
@@ -64,6 +64,7 @@ 


enum pm_api_id {

	PM_GET_API_VERSION = 1,

	PM_SYSTEM_SHUTDOWN = 12,

	PM_REQUEST_NODE = 13,

	PM_RELEASE_NODE,

	PM_SET_REQUIREMENT,
@@ -340,6 +341,7 @@ int zynqmp_pm_write_ggs(u32 index, u32 value); 
int zynqmp_pm_read_ggs(u32 index, u32 *value);

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);

#else

static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)

{
@@ -482,6 +484,10 @@ static inline int zynqmp_pm_read_pggs(u32 index, u32 *value) 
{

	return -ENODEV;

}

static inline int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype)

{

	return -ENODEV;

}

#endif



#endif /* __FIRMWARE_ZYNQMP_H__ */