[U-Boot] [PATCH 024/172] arm: socfpga: spl: Add missing reset logic

Marek Vasut
2015-07-27T20:49:47Z

Make sure that all the peripherals are correctly reset and then
brought out of reset in the SPL. Not going through proper reset
cycle might leave the IP blocks in inconsistent state.

Signed-off-by: Marek Vasut <marex@denx.de>
---
arch/arm/mach-socfpga/spl.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-socfpga/spl.c b/arch/arm/mach-socfpga/spl.c
index 15fee0a..f134bb7 100644
--- a/arch/arm/mach-socfpga/spl.c
+++ b/arch/arm/mach-socfpga/spl.c
@@ -89,6 +89,11 @@ void spl_board_init(void)
/* freeze all IO banks */
sys_mgr_frzctrl_freeze_req();

+ /* Put everything into reset but L4WD0. */
+ socfpga_per_reset_all();
+ /* Put FPGA bridges into reset too. */
+ socfpga_bridges_reset(1);
+
socfpga_per_reset(SOCFPGA_RESET(SDR), 0);
socfpga_per_reset(SOCFPGA_RESET(UART0), 0);
socfpga_per_reset(SOCFPGA_RESET(OSC1TIMER0), 0);
@@ -115,8 +120,9 @@ void spl_board_init(void)

#endif /* CONFIG_SOCFPGA_VIRTUAL_TARGET */

- /* de-assert reset for peripherals and bridges based on handoff */
+ /* De-assert reset for peripherals and bridges based on handoff */
reset_deassert_peripherals_handoff();
+ socfpga_bridges_reset(0);

debug("Unfreezing/Thaw all I/O banks\n");
/* unfreeze / thaw all IO banks */
@@ -145,4 +151,6 @@ void spl_board_init(void)
puts("SDRAM size check failed!\n");
hang();
}
+
+ socfpga_bridges_reset(1);
}
--
2.1.4