MSCC: add support for Ocelot SoCs
This family of SoCs are found in the Microsemi Switches solution and have
already a support in the linux kernel.
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
diff --git a/arch/mips/mach-mscc/reset.c b/arch/mips/mach-mscc/reset.c
new file mode 100644
index 0000000..390bbd0
--- /dev/null
+++ b/arch/mips/mach-mscc/reset.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2018 Microsemi Corporation
+ */
+
+#include <common.h>
+
+#include <asm/sections.h>
+#include <asm/io.h>
+
+#include <asm/reboot.h>
+
+void _machine_restart(void)
+{
+ register u32 resetbits = PERF_SOFT_RST_SOFT_CHIP_RST;
+ (void)readl(BASE_DEVCPU_GCB + PERF_SOFT_RST);
+
+ /* Make sure VCore is NOT protected from reset */
+ clrbits_le32(BASE_CFG + ICPU_RESET, ICPU_RESET_CORE_RST_PROTECT);
+
+ /* Change to SPI bitbang for SPI reset workaround... */
+ writel(ICPU_SW_MODE_SW_SPI_CS_OE(1) | ICPU_SW_MODE_SW_SPI_CS(1) |
+ ICPU_SW_MODE_SW_PIN_CTRL_MODE, BASE_CFG + ICPU_SW_MODE);
+
+ /* Do the global reset */
+ writel(resetbits, BASE_DEVCPU_GCB + PERF_SOFT_RST);
+
+ while (1)
+ ; /* NOP */
+}