[PATCH v5] event: Add fpga load event

[christian . taedcke-oss]

From: Christian Taedcke <christian.taed...@weidmueller.com>

This enables implementing custom logic after a bitstream was loaded
into the fpga.

Signed-off-by: Christian Taedcke <christian.taed...@weidmueller.com>
Reviewed-by: Simon Glass <s...@chromium.org>
---

Changes in v5:
- remove changes from kmcent2 board file
- add missing include to event.h

Changes in v4:
- add include common.h to kmcent2 board file

Changes in v3:
- replace #if with if
- remove previously added printf
- return notification error from fpga_load()
- fix static_assert checking event name list

Changes in v2:
- replace __weak function with a new event

 common/event.c      |  3 +++
 drivers/fpga/fpga.c | 20 ++++++++++++++++++++
 include/event.h     | 17 +++++++++++++++++
 3 files changed, 40 insertions(+)

diff --git a/common/event.c b/common/event.c
index 164c95f8f5..20720c5283 100644
--- a/common/event.c
+++ b/common/event.c
@@ -36,6 +36,9 @@ const char *const type_name[] = {
        /* init hooks */
        "misc_init_f",
 
+       /* Fpga load hook */
+       "fpga_load",
+
        /* fdt hooks */
        "ft_fixup",
 
diff --git a/drivers/fpga/fpga.c b/drivers/fpga/fpga.c
index 7f6b6bc73a..81e6d8ffc0 100644
--- a/drivers/fpga/fpga.c
+++ b/drivers/fpga/fpga.c
@@ -244,6 +244,21 @@ int fpga_loads(int devnum, const void *buf, size_t size,
 }
 #endif
 
+static int fpga_load_event_notify(const void *buf, size_t bsize, int result)
+{
+       if (CONFIG_IS_ENABLED(EVENT)) {
+               struct event_fpga_load load = {
+                       .buf = buf,
+                       .bsize = bsize,
+                       .result = result
+               };
+
+               return event_notify(EVT_FPGA_LOAD, &load, sizeof(load));
+       }
+
+       return 0;
+}
+
 /*
  * Generic multiplexing code
  */
@@ -251,6 +266,7 @@ int fpga_load(int devnum, const void *buf, size_t bsize, 
bitstream_type bstype,
              int flags)
 {
        int ret_val = FPGA_FAIL;           /* assume failure */
+       int ret_notify;
        const fpga_desc *desc = fpga_validate(devnum, buf, bsize,
                                              (char *)__func__);
 
@@ -284,6 +300,10 @@ int fpga_load(int devnum, const void *buf, size_t bsize, 
bitstream_type bstype,
                }
        }
 
+       ret_notify = fpga_load_event_notify(buf, bsize, ret_val);
+       if (ret_notify)
+               return ret_notify;
+
        return ret_val;
 }
 
diff --git a/include/event.h b/include/event.h
index fe41080fa6..daf44bf8a8 100644
--- a/include/event.h
+++ b/include/event.h
@@ -11,6 +11,7 @@
 #define __event_h
 
 #include <dm/ofnode_decl.h>
+#include <linux/types.h>
 
 /**
  * enum event_t - Types of events supported by U-Boot
@@ -31,6 +32,9 @@ enum event_t {
        /* Init hooks */
        EVT_MISC_INIT_F,
 
+       /* Fpga load hook */
+       EVT_FPGA_LOAD,
+
        /* Device tree fixups before booting */
        EVT_FT_FIXUP,
 
@@ -59,6 +63,19 @@ union event_data {
                struct udevice *dev;
        } dm;
 
+       /**
+        * struct event_fpga_load - fpga load event
+        *
+        * @buf: The buffer that was loaded into the fpga
+        * @bsize: The size of the buffer that was loaded into the fpga
+        * @result: Result of the load operation
+        */
+       struct event_fpga_load {
+               const void *buf;
+               size_t bsize;
+               int result;
+       } fpga_load;
+
        /**
         * struct event_ft_fixup - FDT fixup before booting
         *
-- 
2.34.1