From: Marek Vasut <marex@denx.de>
Date: Mon, 24 Aug 2015 09:51:46 +0000 (+0200)
Subject: arm: socfpga: Assure ISWGRP 0 and 1 are inited
X-Git-Tag: KARO-TXSD-2017-03-15~3429^2~7
X-Git-Url: https://git.karo-electronics.de/?p=karo-tx-uboot.git;a=commitdiff_plain;h=65d372c44c6fd7ba280c44704136c91a03618a27

arm: socfpga: Assure ISWGRP 0 and 1 are inited

This fix makes sure that the ISWGRP0 and ISWGRP1 registers are
correctly inited. In case those registers are not initialized,
it is not possible to access the registers synthesised in the
FPGA through the bridges. Any such access produces data abort.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
---

diff --git a/arch/arm/mach-socfpga/reset_manager.c b/arch/arm/mach-socfpga/reset_manager.c
index 1186358a71..b6beaa2f22 100644
--- a/arch/arm/mach-socfpga/reset_manager.c
+++ b/arch/arm/mach-socfpga/reset_manager.c
@@ -7,13 +7,16 @@
 
 #include <common.h>
 #include <asm/io.h>
-#include <asm/arch/reset_manager.h>
 #include <asm/arch/fpga_manager.h>
+#include <asm/arch/reset_manager.h>
+#include <asm/arch/system_manager.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
 static const struct socfpga_reset_manager *reset_manager_base =
 		(void *)SOCFPGA_RSTMGR_ADDRESS;
+static struct socfpga_system_manager *sysmgr_regs =
+	(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
 
 /* Assert or de-assert SoCFPGA reset manager reset. */
 void socfpga_per_reset(u32 reset, int set)
@@ -97,6 +100,9 @@ void socfpga_bridges_reset(int enable)
 		/* brdmodrst */
 		writel(0xffffffff, &reset_manager_base->brg_mod_reset);
 	} else {
+		writel(0, &sysmgr_regs->iswgrp_handoff[0]);
+		writel(l3mask, &sysmgr_regs->iswgrp_handoff[1]);
+
 		/* Check signal from FPGA. */
 		if (!fpgamgr_test_fpga_ready()) {
 			/* FPGA not ready, do nothing. */