From 5edf94d92197473defacd171fa2fe46c6626a5fa Mon Sep 17 00:00:00 2001
From: Chee Hong Ang <chee.hong.ang@intel.com>
Date: Mon, 10 Aug 2020 22:59:49 +0800
Subject: [PATCH] arm: socfpga: soc64: Add timeout waiting for NOC idle ACK

Add timeout waiting for NOC idle ACK during FPGA bridge
disable/enable.

Signed-off-by: Chee Hong Ang <chee.hong.ang@intel.com>
---
 arch/arm/mach-socfpga/reset_manager_s10.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/arch/arm/mach-socfpga/reset_manager_s10.c b/arch/arm/mach-socfpga/reset_manager_s10.c
index 9f16bf9..3746e6a 100644
--- a/arch/arm/mach-socfpga/reset_manager_s10.c
+++ b/arch/arm/mach-socfpga/reset_manager_s10.c
@@ -9,6 +9,7 @@
 #include <asm/arch/reset_manager.h>
 #include <asm/arch/system_manager.h>
 #include <dt-bindings/reset/altr,rst-mgr-s10.h>
+#include <linux/iopoll.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -54,6 +55,8 @@ void socfpga_per_reset_all(void)
 
 void socfpga_bridges_reset(int enable)
 {
+	u32 reg;
+
 	if (enable) {
 		/* clear idle request to all bridges */
 		setbits_le32(socfpga_get_sysmgr_addr() +
@@ -64,9 +67,9 @@ void socfpga_bridges_reset(int enable)
 			     ~0);
 
 		/* Poll until all idleack to 0 */
-		while (readl(socfpga_get_sysmgr_addr() +
-			     SYSMGR_SOC64_NOC_IDLEACK))
-			;
+		read_poll_timeout(readl, socfpga_get_sysmgr_addr() +
+				  SYSMGR_SOC64_NOC_IDLEACK, reg, !reg, 1000,
+				  300000);
 	} else {
 		/* set idle request to all bridges */
 		writel(~0,
@@ -77,14 +80,18 @@ void socfpga_bridges_reset(int enable)
 		writel(1, socfpga_get_sysmgr_addr() + SYSMGR_SOC64_NOC_TIMEOUT);
 
 		/* Poll until all idleack to 1 */
-		while ((readl(socfpga_get_sysmgr_addr() + SYSMGR_SOC64_NOC_IDLEACK) ^
-			(SYSMGR_NOC_H2F_MSK | SYSMGR_NOC_LWH2F_MSK)))
-			;
+		read_poll_timeout(readl, socfpga_get_sysmgr_addr() +
+				  SYSMGR_SOC64_NOC_IDLEACK, reg,
+				  reg == (SYSMGR_NOC_H2F_MSK |
+					  SYSMGR_NOC_LWH2F_MSK),
+				  1000, 300000);
 
 		/* Poll until all idlestatus to 1 */
-		while ((readl(socfpga_get_sysmgr_addr() + SYSMGR_SOC64_NOC_IDLESTATUS) ^
-			(SYSMGR_NOC_H2F_MSK | SYSMGR_NOC_LWH2F_MSK)))
-			;
+		read_poll_timeout(readl, socfpga_get_sysmgr_addr() +
+				  SYSMGR_SOC64_NOC_IDLESTATUS, reg,
+				  reg == (SYSMGR_NOC_H2F_MSK |
+					  SYSMGR_NOC_LWH2F_MSK),
+				  1000, 300000);
 
 		/* Reset all bridges (except NOR DDR scheduler & F2S) */
 		setbits_le32(socfpga_get_rstmgr_addr() + RSTMGR_SOC64_BRGMODRST,
-- 
2.7.4