[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.ravulapalli at 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, rireland at 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