From 9aa65cab73e4873f3e94c6df3d0efd99f3bc9926 Mon Sep 17 00:00:00 2001
From: Michal Simek <michal.simek@xilinx.com>
Date: Mon, 15 Feb 2016 12:10:32 +0100
Subject: [PATCH] microblaze: Read information about timer/interrupts from DT

Read information about timer and interrupts from DT. This is the first
small step to move timer and intc to DM.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---
 arch/microblaze/cpu/interrupts.c | 25 ++++++++++++++++++++
 arch/microblaze/cpu/timer.c      | 39 +++++++++++++++++++++++++++++++-
 2 files changed, 63 insertions(+), 1 deletion(-)

diff --git a/arch/microblaze/cpu/interrupts.c b/arch/microblaze/cpu/interrupts.c
index b6d6610f2f..e5d8894f54 100644
--- a/arch/microblaze/cpu/interrupts.c
+++ b/arch/microblaze/cpu/interrupts.c
@@ -10,10 +10,13 @@
 
 #include <common.h>
 #include <command.h>
+#include <fdtdec.h>
 #include <malloc.h>
 #include <asm/microblaze_intc.h>
 #include <asm/asm.h>
 
+DECLARE_GLOBAL_DATA_PTR;
+
 void enable_interrupts(void)
 {
 	debug("Enable interrupts for the whole CPU\n");
@@ -113,9 +116,31 @@ int interrupt_init(void)
 {
 	int i;
 
+#ifdef CONFIG_OF_CONTROL
+	const void *blob = gd->fdt_blob;
+	int node = 0;
+
+	debug("INTC: Initialization\n");
+
+	node = fdt_node_offset_by_compatible(blob, node,
+				"xlnx,xps-intc-1.00.a");
+	if (node != -1) {
+		fdt_addr_t base = fdtdec_get_addr(blob, node, "reg");
+		if (base == FDT_ADDR_T_NONE)
+			return -1;
+
+		debug("INTC: Base addr %lx\n", base);
+		intc = (microblaze_intc_t *)base;
+		irq_no = fdtdec_get_int(blob, node, "xlnx,num-intr-inputs", 0);
+		debug("INTC: IRQ NO %x\n", irq_no);
+	} else {
+		return node;
+	}
+#else
 #if defined(CONFIG_SYS_INTC_0_ADDR) && defined(CONFIG_SYS_INTC_0_NUM)
 	intc = (microblaze_intc_t *)CONFIG_SYS_INTC_0_ADDR;
 	irq_no = CONFIG_SYS_INTC_0_NUM;
+#endif
 #endif
 	if (irq_no) {
 		vecs = calloc(1, sizeof(struct irq_action) * irq_no);
diff --git a/arch/microblaze/cpu/timer.c b/arch/microblaze/cpu/timer.c
index 3960bbb08a..c0fc7c0f3c 100644
--- a/arch/microblaze/cpu/timer.c
+++ b/arch/microblaze/cpu/timer.c
@@ -7,9 +7,12 @@
  */
 
 #include <common.h>
+#include <fdtdec.h>
 #include <asm/microblaze_timer.h>
 #include <asm/microblaze_intc.h>
 
+DECLARE_GLOBAL_DATA_PTR;
+
 volatile int timestamp = 0;
 microblaze_timer_t *tmr;
 
@@ -29,8 +32,10 @@ void __udelay(unsigned long usec)
 		while ((get_timer(0) - i) < (usec / 1000))
 			;
 	} else {
+#ifndef CONFIG_OF_CONTROL
 		for (i = 0; i < (usec * XILINX_CLOCK_FREQ / 10000000); i++)
 			;
+#endif
 	}
 }
 
@@ -47,12 +52,44 @@ int timer_init (void)
 	u32 preload = 0;
 	u32 ret = 0;
 
+#ifdef CONFIG_OF_CONTROL
+	const void *blob = gd->fdt_blob;
+	int node = 0;
+	u32 cell[2];
+
+	debug("TIMER: Initialization\n");
+
+	node = fdt_node_offset_by_compatible(blob, node,
+				"xlnx,xps-timer-1.00.a");
+	if (node != -1) {
+		fdt_addr_t base = fdtdec_get_addr(blob, node, "reg");
+		if (base == FDT_ADDR_T_NONE)
+			return -1;
+
+		debug("TIMER: Base addr %lx\n", base);
+		tmr = (microblaze_timer_t *)base;
+
+		ret = fdtdec_get_int_array(blob, node, "interrupts",
+					    cell, ARRAY_SIZE(cell));
+		if (ret)
+			return ret;
+
+		irq = cell[0];
+		debug("TIMER: IRQ %x\n", irq);
+
+		preload = fdtdec_get_int(blob, node, "clock-frequency", 0);
+		preload /= CONFIG_SYS_HZ;
+	} else {
+		return node;
+	}
+
+#else
 #if defined(CONFIG_SYS_TIMER_0_ADDR) && defined(CONFIG_SYS_INTC_0_NUM)
 	preload = XILINX_CLOCK_FREQ / CONFIG_SYS_HZ;
 	irq = CONFIG_SYS_TIMER_0_IRQ;
 	tmr = (microblaze_timer_t *) (CONFIG_SYS_TIMER_0_ADDR);
 #endif
-
+#endif
 	if (tmr && preload && irq >= 0) {
 		tmr->loadreg = preload;
 		tmr->control = TIMER_INTERRUPT | TIMER_RESET;