[U-Boot] [PATCH 1/7] mpc85xx: Support a board-specific processor reset routines

[Kyle Moffett]

Some board models (such as the submitted P2020-based HWW-1U-1A hardware)
need specialized code to run when a reset is requested to ensure proper
synchronization with other hardware.

In order to facilitate such board ports, we add a board_reset_r()
routine which is called from the do_reset() command function instead of
directly poking at the MPC85xx "RSTCR" (reset control) register.

Signed-off-by: Kyle Moffett <Kyle.D.Moffett at boeing.com>
---
 arch/powerpc/cpu/mpc85xx/cpu.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/cpu/mpc85xx/cpu.c b/arch/powerpc/cpu/mpc85xx/cpu.c
index 1aad2ba..dbc662f 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu.c
@@ -204,8 +204,10 @@ int checkcpu (void)
 
 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
-/* Everything after the first generation of PQ3 parts has RSTCR */
-#if defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
+#if defined(CONFIG_BOARD_RESET_R)
+	extern void board_reset_r(void);
+	board_reset_r();
+#elif defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
     defined(CONFIG_MPC8555) || defined(CONFIG_MPC8560)
 	unsigned long val, msr;
 
@@ -221,6 +223,7 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	val |= 0x70000000;
 	mtspr(DBCR0,val);
 #else
+	/* Everything after the first generation of PQ3 parts has RSTCR */
 	volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 	out_be32(&gur->rstcr, 0x2);	/* HRESET_REQ */
 	udelay(100);
-- 
1.7.2.3