1 files changed, 148 insertions, 38 deletions

diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c
index 004f93515a4e..476549a8a709 100644
--- a/arch/arm/mach-msm/timer.c
+++ b/arch/arm/mach-msm/timer.c
@@ -1,7 +1,7 @@
 /*
  *
  * Copyright (C) 2007 Google, Inc.
- * Copyright (c) 2009-2011, Code Aurora Forum. All rights reserved.
+ * Copyright (c) 2009-2012, The Linux Foundation. All rights reserved.
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
@@ -20,15 +20,16 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
 
 #include <asm/mach/time.h>
 #include <asm/hardware/gic.h>
 #include <asm/localtimer.h>
 #include <asm/sched_clock.h>
 
-#include <mach/msm_iomap.h>
-#include <mach/cpu.h>
-#include <mach/board.h>
+#include "common.h"
 
 #define TIMER_MATCH_VAL         0x0000
 #define TIMER_COUNT_VAL         0x0004
@@ -36,7 +37,6 @@
 #define TIMER_ENABLE_CLR_ON_MATCH_EN    BIT(1)
 #define TIMER_ENABLE_EN                 BIT(0)
 #define TIMER_CLEAR             0x000C
-#define DGT_CLK_CTL             0x0034
 #define DGT_CLK_CTL_DIV_4       0x3
 
 #define GPT_HZ 32768
@@ -151,7 +151,7 @@ static int __cpuinit msm_local_timer_setup(struct clock_event_device *evt)
 
         *__this_cpu_ptr(msm_evt.percpu_evt) = evt;
         clockevents_register_device(evt);
-        enable_percpu_irq(evt->irq, 0);
+        enable_percpu_irq(evt->irq, IRQ_TYPE_EDGE_RISING);
         return 0;
 }
 
@@ -172,44 +172,21 @@ static notrace u32 msm_sched_clock_read(void)
         return msm_clocksource.read(&msm_clocksource);
 }
 
-static void __init msm_timer_init(void)
+static void __init msm_timer_init(u32 dgt_hz, int sched_bits, int irq,
+                                  bool percpu)
 {
         struct clock_event_device *ce = &msm_clockevent;
         struct clocksource *cs = &msm_clocksource;
         int res;
-        u32 dgt_hz;
-
-        if (cpu_is_msm7x01()) {
-                event_base = MSM_CSR_BASE;
-                source_base = MSM_CSR_BASE + 0x10;
-                dgt_hz = 19200000 >> MSM_DGT_SHIFT; /* 600 KHz */
-                cs->read = msm_read_timer_count_shift;
-                cs->mask = CLOCKSOURCE_MASK((32 - MSM_DGT_SHIFT));
-        } else if (cpu_is_msm7x30()) {
-                event_base = MSM_CSR_BASE + 0x04;
-                source_base = MSM_CSR_BASE + 0x24;
-                dgt_hz = 24576000 / 4;
-        } else if (cpu_is_qsd8x50()) {
-                event_base = MSM_CSR_BASE;
-                source_base = MSM_CSR_BASE + 0x10;
-                dgt_hz = 19200000 / 4;
-        } else if (cpu_is_msm8x60() || cpu_is_msm8960()) {
-                event_base = MSM_TMR_BASE + 0x04;
-                /* Use CPU0's timer as the global clock source. */
-                source_base = MSM_TMR0_BASE + 0x24;
-                dgt_hz = 27000000 / 4;
-                writel_relaxed(DGT_CLK_CTL_DIV_4, MSM_TMR_BASE + DGT_CLK_CTL);
-        } else
-                BUG();
 
         writel_relaxed(0, event_base + TIMER_ENABLE);
         writel_relaxed(0, event_base + TIMER_CLEAR);
         writel_relaxed(~0, event_base + TIMER_MATCH_VAL);
         ce->cpumask = cpumask_of(0);
+        ce->irq = irq;
 
-        ce->irq = INT_GP_TIMER_EXP;
         clockevents_config_and_register(ce, GPT_HZ, 4, 0xffffffff);
-        if (cpu_is_msm8x60() || cpu_is_msm8960()) {
+        if (percpu) {
                 msm_evt.percpu_evt = alloc_percpu(struct clock_event_device *);
                 if (!msm_evt.percpu_evt) {
                         pr_err("memory allocation failed for %s\n", ce->name);
@@ -219,7 +196,7 @@ static void __init msm_timer_init(void)
                 res = request_percpu_irq(ce->irq, msm_timer_interrupt,
                                          ce->name, msm_evt.percpu_evt);
                 if (!res) {
-                        enable_percpu_irq(ce->irq, 0);
+                        enable_percpu_irq(ce->irq, IRQ_TYPE_EDGE_RISING);
 #ifdef CONFIG_LOCAL_TIMERS
                         local_timer_register(&msm_local_timer_ops);
 #endif
@@ -238,10 +215,143 @@ err:
         res = clocksource_register_hz(cs, dgt_hz);
         if (res)
                 pr_err("clocksource_register failed\n");
-        setup_sched_clock(msm_sched_clock_read,
-                        cpu_is_msm7x01() ? 32 - MSM_DGT_SHIFT : 32, dgt_hz);
+        setup_sched_clock(msm_sched_clock_read, sched_bits, dgt_hz);
 }
 
-struct sys_timer msm_timer = {
-        .init = msm_timer_init
+#ifdef CONFIG_OF
+static const struct of_device_id msm_dgt_match[] __initconst = {
+        { .compatible = "qcom,msm-dgt" },
+        { },
+};
+
+static const struct of_device_id msm_gpt_match[] __initconst = {
+        { .compatible = "qcom,msm-gpt" },
+        { },
+};
+
+static void __init msm_dt_timer_init(void)
+{
+        struct device_node *np;
+        u32 freq;
+        int irq;
+        struct resource res;
+        u32 percpu_offset;
+        void __iomem *dgt_clk_ctl;
+
+        np = of_find_matching_node(NULL, msm_gpt_match);
+        if (!np) {
+                pr_err("Can't find GPT DT node\n");
+                return;
+        }
+
+        event_base = of_iomap(np, 0);
+        if (!event_base) {
+                pr_err("Failed to map event base\n");
+                return;
+        }
+
+        irq = irq_of_parse_and_map(np, 0);
+        if (irq <= 0) {
+                pr_err("Can't get irq\n");
+                return;
+        }
+        of_node_put(np);
+
+        np = of_find_matching_node(NULL, msm_dgt_match);
+        if (!np) {
+                pr_err("Can't find DGT DT node\n");
+                return;
+        }
+
+        if (of_property_read_u32(np, "cpu-offset", &percpu_offset))
+                percpu_offset = 0;
+
+        if (of_address_to_resource(np, 0, &res)) {
+                pr_err("Failed to parse DGT resource\n");
+                return;
+        }
+
+        source_base = ioremap(res.start + percpu_offset, resource_size(&res));
+        if (!source_base) {
+                pr_err("Failed to map source base\n");
+                return;
+        }
+
+        if (!of_address_to_resource(np, 1, &res)) {
+                dgt_clk_ctl = ioremap(res.start + percpu_offset,
+                                      resource_size(&res));
+                if (!dgt_clk_ctl) {
+                        pr_err("Failed to map DGT control base\n");
+                        return;
+                }
+                writel_relaxed(DGT_CLK_CTL_DIV_4, dgt_clk_ctl);
+                iounmap(dgt_clk_ctl);
+        }
+
+        if (of_property_read_u32(np, "clock-frequency", &freq)) {
+                pr_err("Unknown frequency\n");
+                return;
+        }
+        of_node_put(np);
+
+        msm_timer_init(freq, 32, irq, !!percpu_offset);
+}
+
+struct sys_timer msm_dt_timer = {
+        .init = msm_dt_timer_init
+};
+#endif
+
+static int __init msm_timer_map(phys_addr_t event, phys_addr_t source)
+{
+        event_base = ioremap(event, SZ_64);
+        if (!event_base) {
+                pr_err("Failed to map event base\n");
+                return 1;
+        }
+        source_base = ioremap(source, SZ_64);
+        if (!source_base) {
+                pr_err("Failed to map source base\n");
+                return 1;
+        }
+        return 0;
+}
+
+static void __init msm7x01_timer_init(void)
+{
+        struct clocksource *cs = &msm_clocksource;
+
+        if (msm_timer_map(0xc0100000, 0xc0100010))
+                return;
+        cs->read = msm_read_timer_count_shift;
+        cs->mask = CLOCKSOURCE_MASK((32 - MSM_DGT_SHIFT));
+        /* 600 KHz */
+        msm_timer_init(19200000 >> MSM_DGT_SHIFT, 32 - MSM_DGT_SHIFT, 7,
+                        false);
+}
+
+struct sys_timer msm7x01_timer = {
+        .init = msm7x01_timer_init
+};
+
+static void __init msm7x30_timer_init(void)
+{
+        if (msm_timer_map(0xc0100004, 0xc0100024))
+                return;
+        msm_timer_init(24576000 / 4, 32, 1, false);
+}
+
+struct sys_timer msm7x30_timer = {
+        .init = msm7x30_timer_init
+};
+
+static void __init qsd8x50_timer_init(void)
+{
+        if (msm_timer_map(0xAC100000, 0xAC100010))
+                return;
+        msm_timer_init(19200000 / 4, 32, 7, false);
+}
+
+struct sys_timer qsd8x50_timer = {
+        .init = qsd8x50_timer_init
 };