[PATCH v2 2/5] cmd: Add partial reconfiguration command

[Naresh Kumar Ravulapalli]

Command to support FPGA partial reconfiguration (pr) is added.

Signed-off-by: Naresh Kumar Ravulapalli <nareshkumar.ravulapa...@altera.com>
---
 cmd/Kconfig |  8 ++++++++
 cmd/fpga.c  | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/cmd/Kconfig b/cmd/Kconfig
index 2d31abcef73..68143d62a44 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1229,6 +1229,14 @@ config CMD_FPGAD
          fpga_get_reg() function. This functions similarly to the 'md'
          command.
 
+config CMD_FPGA_PR
+       bool "fpga pr - support FPGA partial reconfiguration"
+       depends on CMD_FPGA && FPGA_ALTERA
+       select FPGA_PR
+       help
+         Command enables support for partial reconfiguration on supported
+         FPGA devices.
+
 config CMD_FUSE
        bool "fuse - support for the fuse subssystem"
        help
diff --git a/cmd/fpga.c b/cmd/fpga.c
index 9dc7b63db5d..e4aa44ba7dd 100644
--- a/cmd/fpga.c
+++ b/cmd/fpga.c
@@ -2,6 +2,8 @@
 /*
  * (C) Copyright 2000, 2001
  * Rich Ireland, Enterasys Networks, rirel...@enterasys.com.
+ *
+ * Copyright (C) 2025 Altera Corporation <www.altera.com>
  */
 
 /*
@@ -354,6 +356,31 @@ static int do_fpga_loadmk(struct cmd_tbl *cmdtp, int flag, 
int argc,
 }
 #endif
 
+#if defined(CONFIG_CMD_FPGA_PR)
+static int do_fpga_pr(struct cmd_tbl *cmdtp, int flag, int argc, char * const 
argv[])
+{
+       const char *cmd;
+       char *region;
+       unsigned int region_num;
+       long dev;
+
+       if (argc != cmdtp->maxargs) {
+               printf("Error: argument count mismatch\n");
+               return CMD_RET_USAGE;
+       }
+
+       dev = do_fpga_get_device(argv[0]);
+       cmd = argv[1];
+       region_num = simple_strtoul(argv[2], &region, 10);
+       if (*region != '\0') {
+               printf("Error: region number '%s' is not a valid number\n", 
argv[2]);
+               return CMD_RET_USAGE;
+       }
+
+       return fpga_pr(dev, cmd, region_num);
+}
+#endif
+
 static struct cmd_tbl fpga_commands[] = {
        U_BOOT_CMD_MKENT(info, 1, 1, do_fpga_info, "", ""),
        U_BOOT_CMD_MKENT(dump, 3, 1, do_fpga_dump, "", ""),
@@ -376,6 +403,9 @@ static struct cmd_tbl fpga_commands[] = {
 #if defined(CONFIG_CMD_FPGA_LOAD_SECURE)
        U_BOOT_CMD_MKENT(loads, 6, 1, do_fpga_loads, "", ""),
 #endif
+#if defined(CONFIG_CMD_FPGA_PR)
+       U_BOOT_CMD_MKENT(pr, 3, 1, do_fpga_pr, "", ""),
+#endif
 };
 
 static int do_fpga_wrapper(struct cmd_tbl *cmdtp, int flag, int argc,
@@ -448,4 +478,12 @@ U_BOOT_CMD(fpga, 6, 1, do_fpga_wrapper,
         "            -Userkey address: address where user key is stored\n"
         "            NOTE: secure bitstream has to be created using Xilinx 
bootgen tool\n"
 #endif
+#if defined(CONFIG_CMD_FPGA_PR)
+        "fpga pr <dev> <start|stop> <region>\n"
+        "            Start or stop the partial reconfiguration process by 
freezing or\n"
+        "            unfreezing the specified region\n"
+        "            -start: starts the partial reconfiguration process\n"
+        "            -stop: stops the partial reconfiguration process\n"
+        "            -region: region number to undergo the partial 
reconfiguration process\n"
+#endif
 );
-- 
2.35.3