From 65d372c44c6fd7ba280c44704136c91a03618a27 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Mon, 24 Aug 2015 11:51:46 +0200 Subject: [PATCH] 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 Cc: Dinh Nguyen --- arch/arm/mach-socfpga/reset_manager.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) 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 #include -#include #include +#include +#include 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. */ -- 2.25.1