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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/mips/xilfpga
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/mips/xilfpga')
-rw-r--r--kernel/arch/mips/xilfpga/Kconfig9
-rw-r--r--kernel/arch/mips/xilfpga/Makefile7
-rw-r--r--kernel/arch/mips/xilfpga/Platform3
-rw-r--r--kernel/arch/mips/xilfpga/init.c57
-rw-r--r--kernel/arch/mips/xilfpga/intc.c25
-rw-r--r--kernel/arch/mips/xilfpga/time.c41
6 files changed, 142 insertions, 0 deletions
diff --git a/kernel/arch/mips/xilfpga/Kconfig b/kernel/arch/mips/xilfpga/Kconfig
new file mode 100644
index 000000000..42a030a0e
--- /dev/null
+++ b/kernel/arch/mips/xilfpga/Kconfig
@@ -0,0 +1,9 @@
+choice
+ prompt "Machine type"
+ depends on MACH_XILFPGA
+ default XILFPGA_NEXYS4DDR
+
+config XILFPGA_NEXYS4DDR
+ bool "Nexys4DDR by Digilent"
+
+endchoice
diff --git a/kernel/arch/mips/xilfpga/Makefile b/kernel/arch/mips/xilfpga/Makefile
new file mode 100644
index 000000000..a4deec6fa
--- /dev/null
+++ b/kernel/arch/mips/xilfpga/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for the Xilfpga
+#
+
+obj-y += init.o
+obj-y += intc.o
+obj-y += time.o
diff --git a/kernel/arch/mips/xilfpga/Platform b/kernel/arch/mips/xilfpga/Platform
new file mode 100644
index 000000000..ed375afe3
--- /dev/null
+++ b/kernel/arch/mips/xilfpga/Platform
@@ -0,0 +1,3 @@
+platform-$(CONFIG_MACH_XILFPGA) += xilfpga/
+cflags-$(CONFIG_MACH_XILFPGA) += -I$(srctree)/arch/mips/include/asm/mach-xilfpga
+load-$(CONFIG_MACH_XILFPGA) += 0xffffffff80100000
diff --git a/kernel/arch/mips/xilfpga/init.c b/kernel/arch/mips/xilfpga/init.c
new file mode 100644
index 000000000..ce2aee216
--- /dev/null
+++ b/kernel/arch/mips/xilfpga/init.c
@@ -0,0 +1,57 @@
+/*
+ * Xilfpga platform setup
+ *
+ * Copyright (C) 2015 Imagination Technologies
+ * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
+
+#include <asm/prom.h>
+
+#define XILFPGA_UART_BASE 0xb0401000
+
+const char *get_system_type(void)
+{
+ return "MIPSfpga";
+}
+
+void __init plat_mem_setup(void)
+{
+ __dt_setup_arch(__dtb_start);
+ strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
+}
+
+void __init prom_init(void)
+{
+ setup_8250_early_printk_port(XILFPGA_UART_BASE, 2, 50000);
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
+
+void __init device_tree_init(void)
+{
+ if (!initial_boot_params)
+ return;
+
+ unflatten_and_copy_device_tree();
+}
+
+static int __init plat_of_setup(void)
+{
+ if (!of_have_populated_dt())
+ panic("Device tree not present");
+
+ if (of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL))
+ panic("Failed to populate DT");
+
+ return 0;
+}
+arch_initcall(plat_of_setup);
diff --git a/kernel/arch/mips/xilfpga/intc.c b/kernel/arch/mips/xilfpga/intc.c
new file mode 100644
index 000000000..c4d1a716b
--- /dev/null
+++ b/kernel/arch/mips/xilfpga/intc.c
@@ -0,0 +1,25 @@
+/*
+ * Xilfpga interrupt controller setup
+ *
+ * Copyright (C) 2015 Imagination Technologies
+ * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/of.h>
+#include <linux/of_irq.h>
+
+#include <asm/irq_cpu.h>
+
+static struct of_device_id of_irq_ids[] __initdata = {
+ { .compatible = "mti,cpu-interrupt-controller", .data = mips_cpu_irq_of_init },
+ {},
+};
+
+void __init arch_init_irq(void)
+{
+ of_irq_init(of_irq_ids);
+}
diff --git a/kernel/arch/mips/xilfpga/time.c b/kernel/arch/mips/xilfpga/time.c
new file mode 100644
index 000000000..cbb3fca7b
--- /dev/null
+++ b/kernel/arch/mips/xilfpga/time.c
@@ -0,0 +1,41 @@
+/*
+ * Xilfpga clocksource/timer setup
+ *
+ * Copyright (C) 2015 Imagination Technologies
+ * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+#include <linux/of.h>
+
+#include <asm/time.h>
+
+void __init plat_time_init(void)
+{
+ struct device_node *np;
+ struct clk *clk;
+
+ of_clk_init(NULL);
+ clocksource_probe();
+
+ np = of_get_cpu_node(0, NULL);
+ if (!np) {
+ pr_err("Failed to get CPU node\n");
+ return;
+ }
+
+ clk = of_clk_get(np, 0);
+ if (IS_ERR(clk)) {
+ pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk));
+ return;
+ }
+
+ mips_hpt_frequency = clk_get_rate(clk) / 2;
+ clk_put(clk);
+}