Commit 4f680b72 authored by Rajan Vaja's avatar Rajan Vaja Committed by Greg Kroah-Hartman
Browse files

firmware: xilinx: Add APIs to read/write GGS/PGGS registers 



Add APIs to read/write PGGS and GGS registers.

Signed-off-by: default avatarRajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: default avatarJolly Shah <jolly.shah@xilinx.com>
Link: https://lore.kernel.org/r/1587761887-4279-22-git-send-email-jolly.shah@xilinx.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4db8180f

drivers/firmware/xilinx/zynqmp.c

+66 −0
Original line number Original line Diff line number Diff line
@@ -617,6 +617,72 @@ int zynqmp_pm_sd_dll_reset(u32 node_id, u32 type) 
}

}

EXPORT_SYMBOL_GPL(zynqmp_pm_sd_dll_reset);

EXPORT_SYMBOL_GPL(zynqmp_pm_sd_dll_reset);





/**

 * zynqmp_pm_write_ggs() - PM API for writing global general storage (ggs)

 * @index	GGS register index

 * @value	Register value to be written

 *

 * This function writes value to GGS register.

 *

 * @return      Returns status, either success or error+reason

 */

int zynqmp_pm_write_ggs(u32 index, u32 value)

{

	return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_WRITE_GGS,

				   index, value, NULL);

}

EXPORT_SYMBOL_GPL(zynqmp_pm_write_ggs);



/**

 * zynqmp_pm_write_ggs() - PM API for reading global general storage (ggs)

 * @index	GGS register index

 * @value	Register value to be written

 *

 * This function returns GGS register value.

 *

 * @return      Returns status, either success or error+reason

 */

int zynqmp_pm_read_ggs(u32 index, u32 *value)

{

	return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_READ_GGS,

				   index, 0, value);

}

EXPORT_SYMBOL_GPL(zynqmp_pm_read_ggs);



/**

 * zynqmp_pm_write_pggs() - PM API for writing persistent global general

 *			     storage (pggs)

 * @index	PGGS register index

 * @value	Register value to be written

 *

 * This function writes value to PGGS register.

 *

 * @return      Returns status, either success or error+reason

 */

int zynqmp_pm_write_pggs(u32 index, u32 value)

{

	return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_WRITE_PGGS, index, value,

				   NULL);

}

EXPORT_SYMBOL_GPL(zynqmp_pm_write_pggs);



/**

 * zynqmp_pm_write_pggs() - PM API for reading persistent global general

 *			     storage (pggs)

 * @index	PGGS register index

 * @value	Register value to be written

 *

 * This function returns PGGS register value.

 *

 * @return      Returns status, either success or error+reason

 */

int zynqmp_pm_read_pggs(u32 index, u32 *value)

{

	return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_READ_PGGS, index, 0,

				   value);

}

EXPORT_SYMBOL_GPL(zynqmp_pm_read_pggs);



/**

/**

 * zynqmp_pm_reset_assert - Request setting of reset (1 - assert, 0 - release)

 * zynqmp_pm_reset_assert - Request setting of reset (1 - assert, 0 - release)

 * @reset:		Reset to be configured

 * @reset:		Reset to be configured

include/linux/firmware/xlnx-zynqmp.h

+24 −0
Original line number Original line Diff line number Diff line
@@ -107,6 +107,10 @@ enum pm_ioctl_id { 
	IOCTL_GET_PLL_FRAC_MODE,

	IOCTL_GET_PLL_FRAC_MODE,

	IOCTL_SET_PLL_FRAC_DATA,

	IOCTL_SET_PLL_FRAC_DATA,

	IOCTL_GET_PLL_FRAC_DATA,

	IOCTL_GET_PLL_FRAC_DATA,

	IOCTL_WRITE_GGS = 12,

	IOCTL_READ_GGS = 13,

	IOCTL_WRITE_PGGS = 14,

	IOCTL_READ_PGGS = 15,

};

};





enum pm_query_id {

enum pm_query_id {
@@ -330,6 +334,10 @@ int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities, 
int zynqmp_pm_aes_engine(const u64 address, u32 *out);

int zynqmp_pm_aes_engine(const u64 address, u32 *out);

int zynqmp_pm_fpga_load(const u64 address, const u32 size, const u32 flags);

int zynqmp_pm_fpga_load(const u64 address, const u32 size, const u32 flags);

int zynqmp_pm_fpga_get_status(u32 *value);

int zynqmp_pm_fpga_get_status(u32 *value);

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);

#else

#else

static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)

static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)

{

{
@@ -456,6 +464,22 @@ static inline int zynqmp_pm_fpga_get_status(u32 *value) 
{

{

	return -ENODEV;

	return -ENODEV;

}

}

static inline int zynqmp_pm_write_ggs(u32 index, u32 value)

{

	return -ENODEV;

}

static inline int zynqmp_pm_read_ggs(u32 index, u32 *value)

{

	return -ENODEV;

}

static inline int zynqmp_pm_write_pggs(u32 index, u32 value)

{

	return -ENODEV;

}

static inline int zynqmp_pm_read_pggs(u32 index, u32 *value)

{

	return -ENODEV;

}

#endif

#endif





#endif /* __FIRMWARE_ZYNQMP_H__ */
 
#endif /* __FIRMWARE_ZYNQMP_H__ */