[U-Boot] [PATCH 013/172] arm: socfpga: reset: Add function to reset add peripherals

Marek Vasut
2015-07-27T20:49:36Z

Add socfpga_per_reset_all() function to reset all peripherals
but the L4 watchdog. This is needed in the SPL.

Signed-off-by: Marek Vasut <marex@denx.de>
---
arch/arm/mach-socfpga/include/mach/reset_manager.h | 1 +
arch/arm/mach-socfpga/reset_manager.c | 13 +++++++++++++
2 files changed, 14 insertions(+)

diff --git a/arch/arm/mach-socfpga/include/mach/reset_manager.h b/arch/arm/mach-socfpga/include/mach/reset_manager.h
index 97f155d..457c4b8 100644
--- a/arch/arm/mach-socfpga/include/mach/reset_manager.h
+++ b/arch/arm/mach-socfpga/include/mach/reset_manager.h
@@ -13,6 +13,7 @@ void reset_deassert_peripherals_handoff(void);
void socfpga_bridges_reset(int enable);

void socfpga_per_reset(u32 reset, int set);
+void socfpga_per_reset_all(void);

struct socfpga_reset_manager {
u32 status;
diff --git a/arch/arm/mach-socfpga/reset_manager.c b/arch/arm/mach-socfpga/reset_manager.c
index 6a11c19..1186358 100644
--- a/arch/arm/mach-socfpga/reset_manager.c
+++ b/arch/arm/mach-socfpga/reset_manager.c
@@ -40,6 +40,19 @@ void socfpga_per_reset(u32 reset, int set)
}

/*
+ * Assert reset on every peripheral but L4WD0.
+ * Watchdog must be kept intact to prevent glitches
+ * and/or hangs.
+ */
+void socfpga_per_reset_all(void)
+{
+ const u32 l4wd0 = 1 << RSTMGR_RESET(SOCFPGA_RESET(L4WD0));
+
+ writel(~l4wd0, &reset_manager_base->per_mod_reset);
+ writel(0xffffffff, &reset_manager_base->per2_mod_reset);
+}
+
+/*
* Write the reset manager register to cause reset
*/
void reset_cpu(ulong addr)
--
2.1.4