Merge branch 'depends/cleanup' into next/virt

10 files changed, 250 insertions, 52 deletions

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 64798424b6cb..e920cbe519fa 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -1,3 +1,6 @@
+config CLKSRC_OF
+        bool
+
 config CLKSRC_I8253
         bool
 
@@ -25,6 +28,9 @@ config ARMADA_370_XP_TIMER
 config SUNXI_TIMER
         bool
 
+config VT8500_TIMER
+        bool
+
 config CLKSRC_NOMADIK_MTU
         bool
         depends on (ARCH_NOMADIK || ARCH_U8500)
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index e69511c4c66e..49271105339f 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -1,3 +1,4 @@
+obj-$(CONFIG_CLKSRC_OF) += clksrc-of.o
 obj-$(CONFIG_ATMEL_TCB_CLKSRC)  += tcb_clksrc.o
 obj-$(CONFIG_X86_CYCLONE_TIMER) += cyclone.o
 obj-$(CONFIG_X86_PM_TIMER)      += acpi_pm.o
@@ -16,5 +17,6 @@ obj-$(CONFIG_CLKSRC_DBX500_PRCMU)	+= clksrc-dbx500-prcmu.o
 obj-$(CONFIG_ARMADA_370_XP_TIMER)       += time-armada-370-xp.o
 obj-$(CONFIG_ARCH_BCM2835)      += bcm2835_timer.o
 obj-$(CONFIG_SUNXI_TIMER)       += sunxi_timer.o
+obj-$(CONFIG_VT8500_TIMER)      += vt8500_timer.o
 
 obj-$(CONFIG_ARM_ARCH_TIMER)            += arm_arch_timer.o
diff --git a/drivers/clocksource/bcm2835_timer.c b/drivers/clocksource/bcm2835_timer.c
index bc19f12c20ce..7f796d8f7505 100644
--- a/drivers/clocksource/bcm2835_timer.c
+++ b/drivers/clocksource/bcm2835_timer.c
@@ -101,7 +101,7 @@ static struct of_device_id bcm2835_time_match[] __initconst = {
         {}
 };
 
-static void __init bcm2835_time_init(void)
+void __init bcm2835_timer_init(void)
 {
         struct device_node *node;
         void __iomem *base;
@@ -155,7 +155,3 @@ static void __init bcm2835_time_init(void)
 
         pr_info("bcm2835: system timer (irq = %d)\n", irq);
 }
-
-struct sys_timer bcm2835_timer = {
-        .init = bcm2835_time_init,
-};
diff --git a/drivers/clocksource/clksrc-of.c b/drivers/clocksource/clksrc-of.c
new file mode 100644
index 000000000000..bdabdaa8d00f
--- /dev/null
+++ b/drivers/clocksource/clksrc-of.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/init.h>
+#include <linux/of.h>
+
+extern struct of_device_id __clksrc_of_table[];
+
+static const struct of_device_id __clksrc_of_table_sentinel
+        __used __section(__clksrc_of_table_end);
+
+void __init clocksource_of_init(void)
+{
+        struct device_node *np;
+        const struct of_device_id *match;
+        void (*init_func)(void);
+
+        for_each_matching_node_and_match(np, __clksrc_of_table, &match) {
+                init_func = match->data;
+                init_func();
+        }
+}
diff --git a/drivers/clocksource/cs5535-clockevt.c b/drivers/clocksource/cs5535-clockevt.c
index d9279385304d..ea210482dd20 100644
--- a/drivers/clocksource/cs5535-clockevt.c
+++ b/drivers/clocksource/cs5535-clockevt.c
@@ -100,7 +100,6 @@ static struct clock_event_device cs5535_clockevent = {
         .set_mode = mfgpt_set_mode,
         .set_next_event = mfgpt_next_event,
         .rating = 250,
-        .shift = 32
 };
 
 static irqreturn_t mfgpt_tick(int irq, void *dev_id)
@@ -169,17 +168,11 @@ static int __init cs5535_mfgpt_init(void)
         cs5535_mfgpt_write(cs5535_event_clock, MFGPT_REG_SETUP, val);
 
         /* Set up the clock event */
-        cs5535_clockevent.mult = div_sc(MFGPT_HZ, NSEC_PER_SEC,
-                        cs5535_clockevent.shift);
-        cs5535_clockevent.min_delta_ns = clockevent_delta2ns(0xF,
-                        &cs5535_clockevent);
-        cs5535_clockevent.max_delta_ns = clockevent_delta2ns(0xFFFE,
-                        &cs5535_clockevent);
-
         printk(KERN_INFO DRV_NAME
                 ": Registering MFGPT timer as a clock event, using IRQ %d\n",
                 timer_irq);
-        clockevents_register_device(&cs5535_clockevent);
+        clockevents_config_and_register(&cs5535_clockevent, MFGPT_HZ,
+                                        0xF, 0xFFFE);
 
         return 0;
 
diff --git a/drivers/clocksource/dw_apb_timer_of.c b/drivers/clocksource/dw_apb_timer_of.c
index f7dba5b79b44..ab09ed3742ee 100644
--- a/drivers/clocksource/dw_apb_timer_of.c
+++ b/drivers/clocksource/dw_apb_timer_of.c
@@ -107,7 +107,7 @@ static const struct of_device_id osctimer_ids[] __initconst = {
         {},
 };
 
-static void __init timer_init(void)
+void __init dw_apb_timer_init(void)
 {
         struct device_node *event_timer, *source_timer;
 
@@ -125,7 +125,3 @@ static void __init timer_init(void)
 
         init_sched_clock();
 }
-
-struct sys_timer dw_apb_timer = {
-        .init = timer_init,
-};
diff --git a/drivers/clocksource/nomadik-mtu.c b/drivers/clocksource/nomadik-mtu.c
index 8914c3c1c88b..025afc6dd324 100644
--- a/drivers/clocksource/nomadik-mtu.c
+++ b/drivers/clocksource/nomadik-mtu.c
@@ -134,12 +134,32 @@ static void nmdk_clkevt_mode(enum clock_event_mode mode,
         }
 }
 
+void nmdk_clksrc_reset(void)
+{
+        /* Disable */
+        writel(0, mtu_base + MTU_CR(0));
+
+        /* ClockSource: configure load and background-load, and fire it up */
+        writel(nmdk_cycle, mtu_base + MTU_LR(0));
+        writel(nmdk_cycle, mtu_base + MTU_BGLR(0));
+
+        writel(clk_prescale | MTU_CRn_32BITS | MTU_CRn_ENA,
+               mtu_base + MTU_CR(0));
+}
+
+static void nmdk_clkevt_resume(struct clock_event_device *cedev)
+{
+        nmdk_clkevt_reset();
+        nmdk_clksrc_reset();
+}
+
 static struct clock_event_device nmdk_clkevt = {
         .name           = "mtu_1",
         .features       = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,
         .rating         = 200,
         .set_mode       = nmdk_clkevt_mode,
         .set_next_event = nmdk_clkevt_next,
+        .resume         = nmdk_clkevt_resume,
 };
 
 /*
@@ -161,19 +181,6 @@ static struct irqaction nmdk_timer_irq = {
         .dev_id         = &nmdk_clkevt,
 };
 
-void nmdk_clksrc_reset(void)
-{
-        /* Disable */
-        writel(0, mtu_base + MTU_CR(0));
-
-        /* ClockSource: configure load and background-load, and fire it up */
-        writel(nmdk_cycle, mtu_base + MTU_LR(0));
-        writel(nmdk_cycle, mtu_base + MTU_BGLR(0));
-
-        writel(clk_prescale | MTU_CRn_32BITS | MTU_CRn_ENA,
-               mtu_base + MTU_CR(0));
-}
-
 void __init nmdk_timer_init(void __iomem *base, int irq)
 {
         unsigned long rate;
diff --git a/drivers/clocksource/sunxi_timer.c b/drivers/clocksource/sunxi_timer.c
index 3cd1bd3d7aee..0ce85e29769b 100644
--- a/drivers/clocksource/sunxi_timer.c
+++ b/drivers/clocksource/sunxi_timer.c
@@ -74,7 +74,6 @@ static int sunxi_clkevt_next_event(unsigned long evt,
 
 static struct clock_event_device sunxi_clockevent = {
         .name = "sunxi_tick",
-        .shift = 32,
         .rating = 300,
         .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
         .set_mode = sunxi_clkevt_mode,
@@ -104,7 +103,7 @@ static struct of_device_id sunxi_timer_dt_ids[] = {
         { }
 };
 
-static void __init sunxi_timer_init(void)
+void __init sunxi_timer_init(void)
 {
         struct device_node *node;
         unsigned long rate = 0;
@@ -154,18 +153,8 @@ static void __init sunxi_timer_init(void)
         val = readl(timer_base + TIMER_CTL_REG);
         writel(val | TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG);
 
-        sunxi_clockevent.mult = div_sc(rate / TIMER_SCAL,
-                                NSEC_PER_SEC,
-                                sunxi_clockevent.shift);
-        sunxi_clockevent.max_delta_ns = clockevent_delta2ns(0xff,
-                                                            &sunxi_clockevent);
-        sunxi_clockevent.min_delta_ns = clockevent_delta2ns(0x1,
-                                                            &sunxi_clockevent);
         sunxi_clockevent.cpumask = cpumask_of(0);
 
-        clockevents_register_device(&sunxi_clockevent);
+        clockevents_config_and_register(&sunxi_clockevent, rate / TIMER_SCAL,
+                                        0x1, 0xff);
 }
-
-struct sys_timer sunxi_timer = {
-        .init = sunxi_timer_init,
-};
diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c
index 32cb929b8eb6..8a6187225dd0 100644
--- a/drivers/clocksource/tcb_clksrc.c
+++ b/drivers/clocksource/tcb_clksrc.c
@@ -157,7 +157,6 @@ static struct tc_clkevt_device clkevt = {
                 .name           = "tc_clkevt",
                 .features       = CLOCK_EVT_FEAT_PERIODIC
                                         | CLOCK_EVT_FEAT_ONESHOT,
-                .shift          = 32,
                 /* Should be lower than at91rm9200's system timer */
                 .rating         = 125,
                 .set_next_event = tc_next_event,
@@ -196,13 +195,9 @@ static void __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx)
 
         timer_clock = clk32k_divisor_idx;
 
-        clkevt.clkevt.mult = div_sc(32768, NSEC_PER_SEC, clkevt.clkevt.shift);
-        clkevt.clkevt.max_delta_ns
-                = clockevent_delta2ns(0xffff, &clkevt.clkevt);
-        clkevt.clkevt.min_delta_ns = clockevent_delta2ns(1, &clkevt.clkevt) + 1;
         clkevt.clkevt.cpumask = cpumask_of(0);
 
-        clockevents_register_device(&clkevt.clkevt);
+        clockevents_config_and_register(&clkevt.clkevt, 32768, 1, 0xffff);
 
         setup_irq(irq, &tc_irqaction);
 }
diff --git a/drivers/clocksource/vt8500_timer.c b/drivers/clocksource/vt8500_timer.c
new file mode 100644
index 000000000000..ed66cf07d3c6
--- /dev/null
+++ b/drivers/clocksource/vt8500_timer.c
@@ -0,0 +1,179 @@
+/*
+ *  arch/arm/mach-vt8500/timer.c
+ *
+ *  Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz>
+ *  Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*
+ * This file is copied and modified from the original timer.c provided by
+ * Alexey Charkov. Minor changes have been made for Device Tree Support.
+ */
+
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/delay.h>
+#include <asm/mach/time.h>
+
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#define VT8500_TIMER_OFFSET     0x0100
+#define VT8500_TIMER_HZ         3000000
+#define TIMER_MATCH_VAL         0x0000
+#define TIMER_COUNT_VAL         0x0010
+#define TIMER_STATUS_VAL        0x0014
+#define TIMER_IER_VAL           0x001c          /* interrupt enable */
+#define TIMER_CTRL_VAL          0x0020
+#define TIMER_AS_VAL            0x0024          /* access status */
+#define TIMER_COUNT_R_ACTIVE    (1 << 5)        /* not ready for read */
+#define TIMER_COUNT_W_ACTIVE    (1 << 4)        /* not ready for write */
+#define TIMER_MATCH_W_ACTIVE    (1 << 0)        /* not ready for write */
+
+#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
+
+static void __iomem *regbase;
+
+static cycle_t vt8500_timer_read(struct clocksource *cs)
+{
+        int loops = msecs_to_loops(10);
+        writel(3, regbase + TIMER_CTRL_VAL);
+        while ((readl((regbase + TIMER_AS_VAL)) & TIMER_COUNT_R_ACTIVE)
+                                                && --loops)
+                cpu_relax();
+        return readl(regbase + TIMER_COUNT_VAL);
+}
+
+static struct clocksource clocksource = {
+        .name           = "vt8500_timer",
+        .rating         = 200,
+        .read           = vt8500_timer_read,
+        .mask           = CLOCKSOURCE_MASK(32),
+        .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static int vt8500_timer_set_next_event(unsigned long cycles,
+                                    struct clock_event_device *evt)
+{
+        int loops = msecs_to_loops(10);
+        cycle_t alarm = clocksource.read(&clocksource) + cycles;
+        while ((readl(regbase + TIMER_AS_VAL) & TIMER_MATCH_W_ACTIVE)
+                                                && --loops)
+                cpu_relax();
+        writel((unsigned long)alarm, regbase + TIMER_MATCH_VAL);
+
+        if ((signed)(alarm - clocksource.read(&clocksource)) <= 16)
+                return -ETIME;
+
+        writel(1, regbase + TIMER_IER_VAL);
+
+        return 0;
+}
+
+static void vt8500_timer_set_mode(enum clock_event_mode mode,
+                              struct clock_event_device *evt)
+{
+        switch (mode) {
+        case CLOCK_EVT_MODE_RESUME:
+        case CLOCK_EVT_MODE_PERIODIC:
+                break;
+        case CLOCK_EVT_MODE_ONESHOT:
+        case CLOCK_EVT_MODE_UNUSED:
+        case CLOCK_EVT_MODE_SHUTDOWN:
+                writel(readl(regbase + TIMER_CTRL_VAL) | 1,
+                        regbase + TIMER_CTRL_VAL);
+                writel(0, regbase + TIMER_IER_VAL);
+                break;
+        }
+}
+
+static struct clock_event_device clockevent = {
+        .name           = "vt8500_timer",
+        .features       = CLOCK_EVT_FEAT_ONESHOT,
+        .rating         = 200,
+        .set_next_event = vt8500_timer_set_next_event,
+        .set_mode       = vt8500_timer_set_mode,
+};
+
+static irqreturn_t vt8500_timer_interrupt(int irq, void *dev_id)
+{
+        struct clock_event_device *evt = dev_id;
+        writel(0xf, regbase + TIMER_STATUS_VAL);
+        evt->event_handler(evt);
+
+        return IRQ_HANDLED;
+}
+
+static struct irqaction irq = {
+        .name    = "vt8500_timer",
+        .flags   = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+        .handler = vt8500_timer_interrupt,
+        .dev_id  = &clockevent,
+};
+
+static struct of_device_id vt8500_timer_ids[] = {
+        { .compatible = "via,vt8500-timer" },
+        { }
+};
+
+void __init vt8500_timer_init(void)
+{
+        struct device_node *np;
+        int timer_irq;
+
+        np = of_find_matching_node(NULL, vt8500_timer_ids);
+        if (!np) {
+                pr_err("%s: Timer description missing from Device Tree\n",
+                                                                __func__);
+                return;
+        }
+        regbase = of_iomap(np, 0);
+        if (!regbase) {
+                pr_err("%s: Missing iobase description in Device Tree\n",
+                                                                __func__);
+                of_node_put(np);
+                return;
+        }
+        timer_irq = irq_of_parse_and_map(np, 0);
+        if (!timer_irq) {
+                pr_err("%s: Missing irq description in Device Tree\n",
+                                                                __func__);
+                of_node_put(np);
+                return;
+        }
+
+        writel(1, regbase + TIMER_CTRL_VAL);
+        writel(0xf, regbase + TIMER_STATUS_VAL);
+        writel(~0, regbase + TIMER_MATCH_VAL);
+
+        if (clocksource_register_hz(&clocksource, VT8500_TIMER_HZ))
+                pr_err("%s: vt8500_timer_init: clocksource_register failed for %s\n",
+                                        __func__, clocksource.name);
+
+        clockevent.cpumask = cpumask_of(0);
+
+        if (setup_irq(timer_irq, &irq))
+                pr_err("%s: setup_irq failed for %s\n", __func__,
+                                                        clockevent.name);
+        clockevents_config_and_register(&clockevent, VT8500_TIMER_HZ,
+                                        4, 0xf0000000);
+}
+