mvebu: Add board_pex_config()

Allow boards to do some initialization when PCIe comes up.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>

arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.c

@@ -13,6 +13,11 @@
 #include "ctrl_pex.h"
 #include "sys_env_lib.h"
 
+__weak void board_pex_config(void)
+{
+	/* nothing in this weak default implementation */
+}
+
 int hws_pex_config(const struct serdes_map *serdes_map, u8 count)
 {
 	u32 pex_idx, tmp, next_busno, first_busno, temp_pex_reg,
@@ -77,6 +82,9 @@ int hws_pex_config(const struct serdes_map *serdes_map, u8 count)
 
 	/* Support gen1/gen2 */
 	DEBUG_INIT_FULL_S("Support gen1/gen2\n");
+
+	board_pex_config();
+
 	next_busno = 0;
 	mdelay(150);
 

arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.h

@@ -83,4 +83,6 @@ int pex_local_bus_num_set(u32 pex_if, u32 bus_num);
 int pex_local_dev_num_set(u32 pex_if, u32 dev_num);
 u32 pex_config_read(u32 pex_if, u32 bus, u32 dev, u32 func, u32 reg_off);
 
+void board_pex_config(void);
+
 #endif