From: Dinh Nguyen <dinguyen@opensource.altera.com>
Date: Mon, 30 Mar 2015 22:01:07 +0000 (-0500)
Subject: arm: socfpga: spl: allow bootrom to enable IOs after warm reset
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=08e463ee8a7a5641e191be2a8e934d8284d1ca55;p=u-boot.git

arm: socfpga: spl: allow bootrom to enable IOs after warm reset

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

diff --git a/arch/arm/cpu/armv7/socfpga/spl.c b/arch/arm/cpu/armv7/socfpga/spl.c
index 95992f0d79..787ad7fb0d 100644
--- a/arch/arm/cpu/armv7/socfpga/spl.c
+++ b/arch/arm/cpu/armv7/socfpga/spl.c
@@ -154,6 +154,9 @@ void spl_board_init(void)
 	/* reconfigure the PLLs */
 	cm_basic_init(&cm_default_cfg);
 
+	/* Enable bootrom to configure IOs. */
+	sysmgr_enable_warmrstcfgio();
+
 	/* configure the IOCSR / IO buffer settings */
 	if (scan_mgr_configure_iocsr())
 		hang();
diff --git a/arch/arm/cpu/armv7/socfpga/system_manager.c b/arch/arm/cpu/armv7/socfpga/system_manager.c
index 11f7badbf2..8126e0d43c 100644
--- a/arch/arm/cpu/armv7/socfpga/system_manager.c
+++ b/arch/arm/cpu/armv7/socfpga/system_manager.c
@@ -66,3 +66,12 @@ void sysmgr_pinmux_init(void)
 
 	populate_sysmgr_fpgaintf_module();
 }
+
+/*
+ * This bit allows the bootrom to configure the IOs after a warm reset.
+ */
+void sysmgr_enable_warmrstcfgio(void)
+{
+	setbits_le32(&sysmgr_regs->romcodegrp_ctrl,
+		     SYSMGR_ROMCODEGRP_CTRL_WARMRSTCFGIO);
+}
diff --git a/arch/arm/include/asm/arch-socfpga/system_manager.h b/arch/arm/include/asm/arch-socfpga/system_manager.h
index 071ec4f266..51d9815778 100644
--- a/arch/arm/include/asm/arch-socfpga/system_manager.h
+++ b/arch/arm/include/asm/arch-socfpga/system_manager.h
@@ -10,6 +10,7 @@
 #ifndef __ASSEMBLY__
 
 void sysmgr_pinmux_init(void);
+void sysmgr_enable_warmrstcfgio(void);
 
 /* declaration for handoff table type */
 extern unsigned long sys_mgr_init_table[CONFIG_HPS_PINMUX_NUM];