This patch adds load PDI API support to enable full/partial PDI loading
from linux. Programmable Device Image (PDI) is combination of headers,
images and bitstream files to be loaded.

Signed-off-by: Nava kishore Manne <redacted>
Reviewed-by: Moritz Fischer <mdf@kernel.org>
---
Changes for v2:
               -Updated API Doc and commit msg.
                No functional changes.

Changes for v3:
               -None.

Changes for v4:
               -Rebased the changes on linux-next.
                No functional changes

Changes for v5:
               -None.

Changes for v6:
               -None.

Changes for v7:
               -None.

Changes for v8:
                -None.

  drivers/firmware/xilinx/zynqmp.c     | 17 +++++++++++++++++
  include/linux/firmware/xlnx-zynqmp.h | 10 ++++++++++
  2 files changed, 27 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 15b138326ecc..2db571da9ad8 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c

@@ -1011,6 +1011,23 @@ int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
  }
  EXPORT_SYMBOL_GPL(zynqmp_pm_set_requirement);
  
+/**
+ * zynqmp_pm_load_pdi - Load and process PDI
+ * @src:       Source device where PDI is located
+ * @address:   PDI src address
+ *
+ * This function provides support to load PDI from linux
+ *
+ * Return: Returns status, either success or error+reason
+ */
+int zynqmp_pm_load_pdi(const u32 src, const u64 address)
+{
+	return zynqmp_pm_invoke_fn(PM_LOAD_PDI, src,
+				   lower_32_bits(address),
+				   upper_32_bits(address), 0, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_load_pdi);
+
  /**
   * zynqmp_pm_aes - Access AES hardware to encrypt/decrypt the data using
   * AES-GCM core.

diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 9d1a5c175065..56b426fe020c 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h

@@ -52,6 +52,10 @@
  #define	ZYNQMP_PM_CAPABILITY_WAKEUP	0x4U
  #define	ZYNQMP_PM_CAPABILITY_UNUSABLE	0x8U
  
+/* Loader commands */
+#define PM_LOAD_PDI	0x701

+
  /*
   * Firmware FPGA Manager flags
   * XILINX_ZYNQMP_PM_FPGA_FULL:	FPGA full reconfiguration

@@ -411,6 +415,7 @@ int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param,
  				 u32 *value);
  int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,
  				 u32 value);
+int zynqmp_pm_load_pdi(const u32 src, const u64 address);
  #else
  static inline int zynqmp_pm_get_api_version(u32 *version)
  {

@@ -622,6 +627,11 @@ static inline int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,
  {
  	return -ENODEV;
  }
+
+static inline int zynqmp_pm_load_pdi(const u32 src, const u64 address)
+{
+	return -ENODEV;
+}
  #endif
  
  #endif /* __FIRMWARE_ZYNQMP_H__ */