Merge remote-tracking branch 'arm-soc/clksrc/cleanup' into mxs/cleanup

14 files changed, 49 insertions, 106 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 13b739469c51..865c25ded153 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1593,6 +1593,7 @@ config HAVE_ARM_ARCH_TIMER
 config HAVE_ARM_TWD
         bool
         depends on SMP
+        select CLKSRC_OF if OF
         help
           This options enables support for the ARM timer and watchdog unit
 
diff --git a/arch/arm/include/asm/smp_twd.h b/arch/arm/include/asm/smp_twd.h
index 0f01f4677bd2..7b2899c2f7fc 100644
--- a/arch/arm/include/asm/smp_twd.h
+++ b/arch/arm/include/asm/smp_twd.h
@@ -34,12 +34,4 @@ struct twd_local_timer name __initdata = {	\
 
 int twd_local_timer_register(struct twd_local_timer *);
 
-#ifdef CONFIG_HAVE_ARM_TWD
-void twd_local_timer_of_register(void);
-#else
-static inline void twd_local_timer_of_register(void)
-{
-}
-#endif
-
 #endif
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index 3f2565037480..90525d9d290b 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -362,25 +362,13 @@ int __init twd_local_timer_register(struct twd_local_timer *tlt)
 }
 
 #ifdef CONFIG_OF
-const static struct of_device_id twd_of_match[] __initconst = {
-        { .compatible = "arm,cortex-a9-twd-timer",      },
-        { .compatible = "arm,cortex-a5-twd-timer",      },
-        { .compatible = "arm,arm11mp-twd-timer",        },
-        { },
-};
-
-void __init twd_local_timer_of_register(void)
+static void __init twd_local_timer_of_register(struct device_node *np)
 {
-        struct device_node *np;
         int err;
 
         if (!is_smp() || !setup_max_cpus)
                 return;
 
-        np = of_find_matching_node(NULL, twd_of_match);
-        if (!np)
-                return;
-
         twd_ppi = irq_of_parse_and_map(np, 0);
         if (!twd_ppi) {
                 err = -EINVAL;
@@ -398,4 +386,7 @@ void __init twd_local_timer_of_register(void)
 out:
         WARN(err, "twd_local_timer_of_register failed (%d)\n", err);
 }
+CLOCKSOURCE_OF_DECLARE(arm_twd_a9, "arm,cortex-a9-twd-timer", twd_local_timer_of_register);
+CLOCKSOURCE_OF_DECLARE(arm_twd_a5, "arm,cortex-a5-twd-timer", twd_local_timer_of_register);
+CLOCKSOURCE_OF_DECLARE(arm_twd_11mp, "arm,arm11mp-twd-timer", twd_local_timer_of_register);
 #endif
diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c
index a4f9f50247d4..76c1170b3528 100644
--- a/arch/arm/mach-highbank/highbank.c
+++ b/arch/arm/mach-highbank/highbank.c
@@ -32,7 +32,6 @@
 #include <asm/cacheflush.h>
 #include <asm/cputype.h>
 #include <asm/smp_plat.h>
-#include <asm/smp_twd.h>
 #include <asm/hardware/arm_timer.h>
 #include <asm/hardware/timer-sp.h>
 #include <asm/hardware/cache-l2x0.h>
@@ -119,10 +118,10 @@ static void __init highbank_timer_init(void)
         sp804_clocksource_and_sched_clock_init(timer_base + 0x20, "timer1");
         sp804_clockevents_init(timer_base, irq, "timer0");
 
-        twd_local_timer_of_register();
-
         arch_timer_of_register();
         arch_timer_sched_clock_init();
+
+        clocksource_of_init();
 }
 
 static void highbank_power_off(void)
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index 9ffd103b27e4..b59ddcb57c78 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -12,6 +12,7 @@
 
 #include <linux/clk.h>
 #include <linux/clkdev.h>
+#include <linux/clocksource.h>
 #include <linux/cpu.h>
 #include <linux/delay.h>
 #include <linux/export.h>
@@ -28,11 +29,9 @@
 #include <linux/regmap.h>
 #include <linux/micrel_phy.h>
 #include <linux/mfd/syscon.h>
-#include <asm/smp_twd.h>
 #include <asm/hardware/cache-l2x0.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
-#include <asm/mach/time.h>
 #include <asm/system_misc.h>
 
 #include "common.h"
@@ -292,7 +291,7 @@ static void __init imx6q_init_irq(void)
 static void __init imx6q_timer_init(void)
 {
         mx6q_clocks_init();
-        twd_local_timer_of_register();
+        clocksource_of_init();
         imx_print_silicon_rev("i.MX6Q", imx6q_revision());
 }
 
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 2bdd4cf17a8f..4fd80257c73e 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -597,7 +597,7 @@ void __init omap4_local_timer_init(void)
                 int err;
 
                 if (of_have_populated_dt()) {
-                        twd_local_timer_of_register();
+                        clocksource_of_init();
                         return;
                 }
 
diff --git a/arch/arm/mach-spear13xx/spear13xx.c b/arch/arm/mach-spear13xx/spear13xx.c
index c7d2b4a8d8cc..25a10191b021 100644
--- a/arch/arm/mach-spear13xx/spear13xx.c
+++ b/arch/arm/mach-spear13xx/spear13xx.c
@@ -15,12 +15,12 @@
 
 #include <linux/amba/pl022.h>
 #include <linux/clk.h>
+#include <linux/clocksource.h>
 #include <linux/dw_dmac.h>
 #include <linux/err.h>
 #include <linux/of.h>
 #include <asm/hardware/cache-l2x0.h>
 #include <asm/mach/map.h>
-#include <asm/smp_twd.h>
 #include <mach/dma.h>
 #include <mach/generic.h>
 #include <mach/spear.h>
@@ -179,5 +179,5 @@ void __init spear13xx_timer_init(void)
         clk_put(pclk);
 
         spear_setup_of_timer();
-        twd_local_timer_of_register();
+        clocksource_of_init();
 }
diff --git a/arch/arm/mach-ux500/timer.c b/arch/arm/mach-ux500/timer.c
index a6af0b8732ba..d07bbe7f04a6 100644
--- a/arch/arm/mach-ux500/timer.c
+++ b/arch/arm/mach-ux500/timer.c
@@ -7,6 +7,7 @@
 #include <linux/io.h>
 #include <linux/errno.h>
 #include <linux/clksrc-dbx500-prcmu.h>
+#include <linux/clocksource.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/platform_data/clocksource-nomadik-mtu.h>
@@ -32,7 +33,7 @@ static void __init ux500_twd_init(void)
         twd_local_timer = &u8500_twd_local_timer;
 
         if (of_have_populated_dt())
-                twd_local_timer_of_register();
+                clocksource_of_init();
         else {
                 err = twd_local_timer_register(twd_local_timer);
                 if (err)
diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c
index 915683cb67d6..d0ad78998cb6 100644
--- a/arch/arm/mach-vexpress/v2m.c
+++ b/arch/arm/mach-vexpress/v2m.c
@@ -5,6 +5,7 @@
 #include <linux/amba/bus.h>
 #include <linux/amba/mmci.h>
 #include <linux/io.h>
+#include <linux/clocksource.h>
 #include <linux/smp.h>
 #include <linux/init.h>
 #include <linux/irqchip.h>
@@ -25,7 +26,6 @@
 #include <asm/arch_timer.h>
 #include <asm/mach-types.h>
 #include <asm/sizes.h>
-#include <asm/smp_twd.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 #include <asm/mach/time.h>
@@ -435,6 +435,7 @@ static void __init v2m_dt_timer_init(void)
 
         vexpress_clk_of_init();
 
+        clocksource_of_init();
         do {
                 node = of_find_compatible_node(node, NULL, "arm,sp804");
         } while (node && vexpress_get_site_by_node(node) != VEXPRESS_SITE_MB);
@@ -445,8 +446,7 @@ static void __init v2m_dt_timer_init(void)
                                 irq_of_parse_and_map(node, 0));
         }
 
-        if (arch_timer_of_register() != 0)
-                twd_local_timer_of_register();
+        arch_timer_of_register();
 
         if (arch_timer_sched_clock_init() != 0)
                 versatile_sched_clock_init(vexpress_get_24mhz_clock_base(),
diff --git a/drivers/clocksource/bcm2835_timer.c b/drivers/clocksource/bcm2835_timer.c
index 50c68fef944b..766611d29945 100644
--- a/drivers/clocksource/bcm2835_timer.c
+++ b/drivers/clocksource/bcm2835_timer.c
@@ -95,23 +95,13 @@ static irqreturn_t bcm2835_time_interrupt(int irq, void *dev_id)
         }
 }
 
-static struct of_device_id bcm2835_time_match[] __initconst = {
-        { .compatible = "brcm,bcm2835-system-timer" },
-        {}
-};
-
-static void __init bcm2835_timer_init(void)
+static void __init bcm2835_timer_init(struct device_node *node)
 {
-        struct device_node *node;
         void __iomem *base;
         u32 freq;
         int irq;
         struct bcm2835_timer *timer;
 
-        node = of_find_matching_node(NULL, bcm2835_time_match);
-        if (!node)
-                panic("No bcm2835 timer node");
-
         base = of_iomap(node, 0);
         if (!base)
                 panic("Can't remap registers");
diff --git a/drivers/clocksource/clksrc-of.c b/drivers/clocksource/clksrc-of.c
index bdabdaa8d00f..3ef11fba781c 100644
--- a/drivers/clocksource/clksrc-of.c
+++ b/drivers/clocksource/clksrc-of.c
@@ -26,10 +26,10 @@ void __init clocksource_of_init(void)
 {
         struct device_node *np;
         const struct of_device_id *match;
-        void (*init_func)(void);
+        void (*init_func)(struct device_node *);
 
         for_each_matching_node_and_match(np, __clksrc_of_table, &match) {
                 init_func = match->data;
-                init_func();
+                init_func(np);
         }
 }
diff --git a/drivers/clocksource/tegra20_timer.c b/drivers/clocksource/tegra20_timer.c
index 0bde03feb095..2e4d8a666c36 100644
--- a/drivers/clocksource/tegra20_timer.c
+++ b/drivers/clocksource/tegra20_timer.c
@@ -154,29 +154,12 @@ static struct irqaction tegra_timer_irq = {
         .dev_id         = &tegra_clockevent,
 };
 
-static const struct of_device_id timer_match[] __initconst = {
-        { .compatible = "nvidia,tegra20-timer" },
-        {}
-};
-
-static const struct of_device_id rtc_match[] __initconst = {
-        { .compatible = "nvidia,tegra20-rtc" },
-        {}
-};
-
-static void __init tegra20_init_timer(void)
+static void __init tegra20_init_timer(struct device_node *np)
 {
-        struct device_node *np;
         struct clk *clk;
         unsigned long rate;
         int ret;
 
-        np = of_find_matching_node(NULL, timer_match);
-        if (!np) {
-                pr_err("Failed to find timer DT node\n");
-                BUG();
-        }
-
         timer_reg_base = of_iomap(np, 0);
         if (!timer_reg_base) {
                 pr_err("Can't map timer registers\n");
@@ -200,30 +183,6 @@ static void __init tegra20_init_timer(void)
 
         of_node_put(np);
 
-        np = of_find_matching_node(NULL, rtc_match);
-        if (!np) {
-                pr_err("Failed to find RTC DT node\n");
-                BUG();
-        }
-
-        rtc_base = of_iomap(np, 0);
-        if (!rtc_base) {
-                pr_err("Can't map RTC registers");
-                BUG();
-        }
-
-        /*
-         * rtc registers are used by read_persistent_clock, keep the rtc clock
-         * enabled
-         */
-        clk = clk_get_sys("rtc-tegra", NULL);
-        if (IS_ERR(clk))
-                pr_warn("Unable to get rtc-tegra clock\n");
-        else
-                clk_prepare_enable(clk);
-
-        of_node_put(np);
-
         switch (rate) {
         case 12000000:
                 timer_writel(0x000b, TIMERUS_USEC_CFG);
@@ -259,12 +218,34 @@ static void __init tegra20_init_timer(void)
         tegra_clockevent.irq = tegra_timer_irq.irq;
         clockevents_config_and_register(&tegra_clockevent, 1000000,
                                         0x1, 0x1fffffff);
-#ifdef CONFIG_HAVE_ARM_TWD
-        twd_local_timer_of_register();
-#endif
+}
+CLOCKSOURCE_OF_DECLARE(tegra20_timer, "nvidia,tegra20-timer", tegra20_init_timer);
+
+static void __init tegra20_init_rtc(struct device_node *np)
+{
+        struct clk *clk;
+
+        rtc_base = of_iomap(np, 0);
+        if (!rtc_base) {
+                pr_err("Can't map RTC registers");
+                BUG();
+        }
+
+        /*
+         * rtc registers are used by read_persistent_clock, keep the rtc clock
+         * enabled
+         */
+        clk = clk_get_sys("rtc-tegra", NULL);
+        if (IS_ERR(clk))
+                pr_warn("Unable to get rtc-tegra clock\n");
+        else
+                clk_prepare_enable(clk);
+
+        of_node_put(np);
+
         register_persistent_clock(NULL, tegra_read_persistent_clock);
 }
-CLOCKSOURCE_OF_DECLARE(tegra20, "nvidia,tegra20-timer", tegra20_init_timer);
+CLOCKSOURCE_OF_DECLARE(tegra20_rtc, "nvidia,tegra20-rtc", tegra20_init_rtc);
 
 #ifdef CONFIG_PM
 static u32 usec_config;
diff --git a/drivers/clocksource/vt8500_timer.c b/drivers/clocksource/vt8500_timer.c
index 8efc86b5b5dd..242255285597 100644
--- a/drivers/clocksource/vt8500_timer.c
+++ b/drivers/clocksource/vt8500_timer.c
@@ -129,22 +129,10 @@ static struct irqaction irq = {
         .dev_id  = &clockevent,
 };
 
-static struct of_device_id vt8500_timer_ids[] = {
-        { .compatible = "via,vt8500-timer" },
-        { }
-};
-
-static void __init vt8500_timer_init(void)
+static void __init vt8500_timer_init(struct device_node *np)
 {
-        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",
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index 27cfda427dd9..08ed5e19d8c6 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -340,6 +340,7 @@ extern void clocksource_of_init(void);
                 __used __section(__clksrc_of_table)                     \
                  = { .compatible = compat, .data = fn };
 #else
+static inline void clocksource_of_init(void) {}
 #define CLOCKSOURCE_OF_DECLARE(name, compat, fn)
 #endif