1 files changed, 90 insertions, 0 deletions
diff --git a/arch/mips/ralink/rt288x.c b/arch/mips/ralink/rt288x.c
new file mode 100644
index 000000000..493335db2
--- /dev/null
+++ b/arch/mips/ralink/rt288x.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2013 John Crispin <john@phrozen.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/mipsregs.h>
+#include <asm/mach-ralink/ralink_regs.h>
+#include <asm/mach-ralink/rt288x.h>
+
+#include "common.h"
+
+void __init ralink_clk_init(void)
+{
+	unsigned long cpu_rate, wmac_rate = 40000000;
+	u32 t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG);
+	t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK);
+
+	switch (t) {
+	case SYSTEM_CONFIG_CPUCLK_250:
+		cpu_rate = 250000000;
+		break;
+	case SYSTEM_CONFIG_CPUCLK_266:
+		cpu_rate = 266666667;
+		break;
+	case SYSTEM_CONFIG_CPUCLK_280:
+		cpu_rate = 280000000;
+		break;
+	case SYSTEM_CONFIG_CPUCLK_300:
+		cpu_rate = 300000000;
+		break;
+	}
+
+	ralink_clk_add("cpu", cpu_rate);
+	ralink_clk_add("300100.timer", cpu_rate / 2);
+	ralink_clk_add("300120.watchdog", cpu_rate / 2);
+	ralink_clk_add("300500.uart", cpu_rate / 2);
+	ralink_clk_add("300900.i2c", cpu_rate / 2);
+	ralink_clk_add("300c00.uartlite", cpu_rate / 2);
+	ralink_clk_add("400000.ethernet", cpu_rate / 2);
+	ralink_clk_add("480000.wmac", wmac_rate);
+}
+
+void __init ralink_of_remap(void)
+{
+	rt_sysc_membase = plat_of_remap_node("ralink,rt2880-sysc");
+	rt_memc_membase = plat_of_remap_node("ralink,rt2880-memc");
+
+	if (!rt_sysc_membase || !rt_memc_membase)
+		panic("Failed to remap core resources");
+}
+
+void __init prom_soc_init(struct ralink_soc_info *soc_info)
+{
+	void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT2880_SYSC_BASE);
+	const char *name;
+	u32 n0;
+	u32 n1;
+	u32 id;
+
+	n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
+	n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
+	id = __raw_readl(sysc + SYSC_REG_CHIP_ID);
+
+	if (n0 == RT2880_CHIP_NAME0 && n1 == RT2880_CHIP_NAME1) {
+		soc_info->compatible = "ralink,r2880-soc";
+		name = "RT2880";
+	} else {
+		panic("rt288x: unknown SoC, n0:%08x n1:%08x", n0, n1);
+	}
+
+	snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
+		"Ralink %s id:%u rev:%u",
+		name,
+		(id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
+		(id & CHIP_ID_REV_MASK));
+
+	soc_info->mem_base = RT2880_SDRAM_BASE;
+	soc_info->mem_size_min = RT2880_MEM_SIZE_MIN;
+	soc_info->mem_size_max = RT2880_MEM_SIZE_MAX;
+
+	ralink_soc = RT2880_SOC;
+}