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

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Add APIs to read/write PGGS and GGS registers.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Link: https://lore.kernel.org/r/1587761887-4279-22-git-send-email-jolly.shah@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rajan Vaja
2020-04-24 13:58:03 -07:00
committed by Greg Kroah-Hartman
parent 4db8180ffe
commit 4f680b72ea
2 changed files with 90 additions and 0 deletions
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66
drivers/firmware/xilinx/zynqmp.c
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@@ -617,6 +617,72 @@ int zynqmp_pm_sd_dll_reset(u32 node_id, u32 type)
}
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)
* @reset: Reset to be configured