[SPARC]: Convert clock drivers to of_driver framework.

Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 94 insertions, 265 deletions

diff --git a/arch/sparc/kernel/time.c b/arch/sparc/kernel/time.c
index 7dadcdb4ca42..9631e8f4ae60 100644
--- a/arch/sparc/kernel/time.c
+++ b/arch/sparc/kernel/time.c
@@ -42,6 +42,7 @@
 #include <asm/sun4paddr.h>
 #include <asm/page.h>
 #include <asm/pcic.h>
+#include <asm/of_device.h>
 
 extern unsigned long wall_jiffies;
 
@@ -273,83 +274,31 @@ static __inline__ void sun4_clock_probe(void)
 #endif
 }
 
-/* Probe for the mostek real time clock chip. */
-static __inline__ void clock_probe(void)
+static int __devinit clock_probe(struct of_device *op, const struct of_device_id *match)
 {
-        struct linux_prom_registers clk_reg[2];
-        char model[128];
-        register int node, cpuunit, bootbus;
-        struct resource r;
-
-        cpuunit = bootbus = 0;
-        memset(&r, 0, sizeof(r));
-
-        /* Determine the correct starting PROM node for the probe. */
-        node = prom_getchild(prom_root_node);
-        switch (sparc_cpu_model) {
-        case sun4c:
-                break;
-        case sun4m:
-                node = prom_getchild(prom_searchsiblings(node, "obio"));
-                break;
-        case sun4d:
-                node = prom_getchild(bootbus = prom_searchsiblings(prom_getchild(cpuunit = prom_searchsiblings(node, "cpu-unit")), "bootbus"));
-                break;
-        default:
-                prom_printf("CLOCK: Unsupported architecture!\n");
-                prom_halt();
-        }
+        struct device_node *dp = op->node;
+        char *model = of_get_property(dp, "model", NULL);
 
-        /* Find the PROM node describing the real time clock. */
-        sp_clock_typ = MSTK_INVALID;
-        node = prom_searchsiblings(node,"eeprom");
-        if (!node) {
-                prom_printf("CLOCK: No clock found!\n");
-                prom_halt();
-        }
+        if (!model)
+                return -ENODEV;
 
-        /* Get the model name and setup everything up. */
-        model[0] = '\0';
-        prom_getstring(node, "model", model, sizeof(model));
-        if (strcmp(model, "mk48t02") == 0) {
+        if (!strcmp(model, "mk48t02")) {
                 sp_clock_typ = MSTK48T02;
-                if (prom_getproperty(node, "reg", (char *) clk_reg, sizeof(clk_reg)) == -1) {
-                        prom_printf("clock_probe: FAILED!\n");
-                        prom_halt();
-                }
-                if (sparc_cpu_model == sun4d)
-                        prom_apply_generic_ranges (bootbus, cpuunit, clk_reg, 1);
-                else
-                        prom_apply_obio_ranges(clk_reg, 1);
+
                 /* Map the clock register io area read-only */
-                r.flags = clk_reg[0].which_io;
-                r.start = clk_reg[0].phys_addr;
-                mstk48t02_regs = sbus_ioremap(&r, 0,
-                    sizeof(struct mostek48t02), "mk48t02");
+                mstk48t02_regs = of_ioremap(&op->resource[0], 0,
+                                            sizeof(struct mostek48t02),
+                                            "mk48t02");
                 mstk48t08_regs = NULL;  /* To catch weirdness */
-        } else if (strcmp(model, "mk48t08") == 0) {
+        } else if (!strcmp(model, "mk48t08")) {
                 sp_clock_typ = MSTK48T08;
-                if(prom_getproperty(node, "reg", (char *) clk_reg,
-                                    sizeof(clk_reg)) == -1) {
-                        prom_printf("clock_probe: FAILED!\n");
-                        prom_halt();
-                }
-                if (sparc_cpu_model == sun4d)
-                        prom_apply_generic_ranges (bootbus, cpuunit, clk_reg, 1);
-                else
-                        prom_apply_obio_ranges(clk_reg, 1);
-                /* Map the clock register io area read-only */
-                /* XXX r/o attribute is somewhere in r.flags */
-                r.flags = clk_reg[0].which_io;
-                r.start = clk_reg[0].phys_addr;
-                mstk48t08_regs = sbus_ioremap(&r, 0,
-                    sizeof(struct mostek48t08), "mk48t08");
+                mstk48t08_regs = of_ioremap(&op->resource[0], 0,
+                                            sizeof(struct mostek48t08),
+                                            "mk48t08");
 
                 mstk48t02_regs = &mstk48t08_regs->regs;
-        } else {
-                prom_printf("CLOCK: Unknown model name '%s'\n",model);
-                prom_halt();
-        }
+        } else
+                return -ENODEV;
 
         /* Report a low battery voltage condition. */
         if (has_low_battery())
@@ -358,6 +307,28 @@ static __inline__ void clock_probe(void)
         /* Kick start the clock if it is completely stopped. */
         if (mostek_read(mstk48t02_regs + MOSTEK_SEC) & MSTK_STOP)
                 kick_start_clock();
+
+        return 0;
+}
+
+static struct of_device_id clock_match[] = {
+        {
+                .name = "eeprom",
+        },
+        {},
+};
+
+static struct of_platform_driver clock_driver = {
+        .name           = "clock",
+        .match_table    = clock_match,
+        .probe          = clock_probe,
+};
+
+
+/* Probe for the mostek real time clock chip. */
+static void clock_init(void)
+{
+        of_register_driver(&clock_driver, &of_bus_type);
 }
 
 void __init sbus_time_init(void)
@@ -376,7 +347,7 @@ void __init sbus_time_init(void)
         if (ARCH_SUN4)
                 sun4_clock_probe();
         else
-                clock_probe();
+                clock_init();
 
         sparc_init_timers(timer_interrupt);
         
diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c
index 20ca9ec8fd3b..7b9625828603 100644
--- a/arch/sparc64/kernel/pci.c
+++ b/arch/sparc64/kernel/pci.c
@@ -307,7 +307,6 @@ static void __init pci_scan_each_controller_bus(void)
                 p->scan_bus(p);
 }
 
-extern void clock_probe(void);
 extern void power_init(void);
 
 static int __init pcibios_init(void)
@@ -320,7 +319,6 @@ static int __init pcibios_init(void)
 
         isa_init();
         ebus_init();
-        clock_probe();
         power_init();
 
         return 0;
diff --git a/arch/sparc64/kernel/sbus.c b/arch/sparc64/kernel/sbus.c
index 945222e66980..ef68aa4fec65 100644
--- a/arch/sparc64/kernel/sbus.c
+++ b/arch/sparc64/kernel/sbus.c
@@ -1267,8 +1267,6 @@ int __init sbus_arch_preinit(void)
 void __init sbus_arch_postinit(void)
 {
         extern void firetruck_init(void);
-        extern void clock_probe(void);
 
         firetruck_init();
-        clock_probe();
 }
diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index 348b82035561..540e4b6c2dee 100644
--- a/arch/sparc64/kernel/time.c
+++ b/arch/sparc64/kernel/time.c
@@ -770,237 +770,99 @@ static int __init clock_model_matches(char *model)
         return 1;
 }
 
-static void __init __clock_assign_common(void __iomem *addr, char *model)
+static int __devinit clock_probe(struct of_device *op, const struct of_device_id *match)
 {
-        if (model[5] == '0' && model[6] == '2') {
-                mstk48t02_regs = addr;
-        } else if(model[5] == '0' && model[6] == '8') {
-                mstk48t08_regs = addr;
-                mstk48t02_regs = mstk48t08_regs + MOSTEK_48T08_48T02;
-        } else {
-                mstk48t59_regs = addr;
-                mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02;
-        }
-}
-
-static void __init clock_assign_clk_reg(struct linux_prom_registers *clk_reg,
-                                        char *model)
-{
-        unsigned long addr;
+        struct device_node *dp = op->node;
+        char *model = of_get_property(dp, "model", NULL);
+        unsigned long size, flags;
+        void __iomem *regs;
 
-        addr = ((unsigned long) clk_reg[0].phys_addr |
-                (((unsigned long) clk_reg[0].which_io) << 32UL));
-
-        __clock_assign_common((void __iomem *) addr, model);
-}
-
-static int __init clock_probe_central(void)
-{
-        struct linux_prom_registers clk_reg[2], *pr;
-        struct device_node *dp;
-        char *model;
-
-        if (!central_bus)
-                return 0;
-
-        /* Get Central FHC's prom node.  */
-        dp = central_bus->child->prom_node;
-
-        /* Then get the first child device below it.  */
-        dp = dp->child;
-
-        while (dp) {
-                model = of_get_property(dp, "model", NULL);
-                if (!model || !clock_model_matches(model))
-                        goto next_sibling;
-
-                pr = of_get_property(dp, "reg", NULL);
-                memcpy(clk_reg, pr, sizeof(clk_reg));
-
-                apply_fhc_ranges(central_bus->child, clk_reg, 1);
-                apply_central_ranges(central_bus, clk_reg, 1);
-
-                clock_assign_clk_reg(clk_reg, model);
-                return 1;
-
-        next_sibling:
-                dp = dp->sibling;
-        }
+        if (!model || !clock_model_matches(model))
+                return -ENODEV;
 
-        return 0;
-}
+        size = (op->resource[0].end - op->resource[0].start) + 1;
+        regs = of_ioremap(&op->resource[0], 0, size, "clock");
+        if (!regs)
+                return -ENOMEM;
 
-#ifdef CONFIG_PCI
-static void __init clock_isa_ebus_assign_regs(struct resource *res, char *model)
-{
         if (!strcmp(model, "ds1287") ||
             !strcmp(model, "m5819") ||
             !strcmp(model, "m5819p") ||
             !strcmp(model, "m5823")) {
-                ds1287_regs = res->start;
+                ds1287_regs = (unsigned long) regs;
+        } else if (model[5] == '0' && model[6] == '2') {
+                mstk48t02_regs = regs;
+        } else if(model[5] == '0' && model[6] == '8') {
+                mstk48t08_regs = regs;
+                mstk48t02_regs = mstk48t08_regs + MOSTEK_48T08_48T02;
         } else {
-                mstk48t59_regs = (void __iomem *) res->start;
+                mstk48t59_regs = regs;
                 mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02;
         }
-}
-
-static int __init clock_probe_one_ebus_dev(struct linux_ebus_device *edev)
-{
-        struct device_node *dp = edev->prom_node;
-        char *model;
 
-        model = of_get_property(dp, "model", NULL);
-        if (!clock_model_matches(model))
-                return 0;
-
-        clock_isa_ebus_assign_regs(&edev->resource[0], model);
+        printk(KERN_INFO "%s: Clock regs at %p\n", dp->full_name, regs);
 
-        return 1;
-}
-
-static int __init clock_probe_ebus(void)
-{
-        struct linux_ebus *ebus;
+        local_irq_save(flags);
 
-        for_each_ebus(ebus) {
-                struct linux_ebus_device *edev;
+        if (mstk48t02_regs != NULL) {
+                /* Report a low battery voltage condition. */
+                if (has_low_battery())
+                        prom_printf("NVRAM: Low battery voltage!\n");
 
-                for_each_ebusdev(edev, ebus) {
-                        if (clock_probe_one_ebus_dev(edev))
-                                return 1;
-                }
+                /* Kick start the clock if it is completely stopped. */
+                if (mostek_read(mstk48t02_regs + MOSTEK_SEC) & MSTK_STOP)
+                        kick_start_clock();
         }
 
-        return 0;
-}
-
-static int __init clock_probe_one_isa_dev(struct sparc_isa_device *idev)
-{
-        struct device_node *dp = idev->prom_node;
-        char *model;
-
-        model = of_get_property(dp, "model", NULL);
-        if (!clock_model_matches(model))
-                return 0;
-
-        clock_isa_ebus_assign_regs(&idev->resource, model);
-
-        return 1;
-}
-
-static int __init clock_probe_isa(void)
-{
-        struct sparc_isa_bridge *isa_br;
-
-        for_each_isa(isa_br) {
-                struct sparc_isa_device *isa_dev;
-
-                for_each_isadev(isa_dev, isa_br) {
-                        if (clock_probe_one_isa_dev(isa_dev))
-                                return 1;
-                }
-        }
+        set_system_time();
+        
+        local_irq_restore(flags);
 
         return 0;
 }
-#endif /* CONFIG_PCI */
-
-#ifdef CONFIG_SBUS
-static int __init clock_probe_one_sbus_dev(struct sbus_bus *sbus, struct sbus_dev *sdev)
-{
-        struct resource *res;
-        char model[64];
-        void __iomem *addr;
-
-        prom_getstring(sdev->prom_node, "model", model, sizeof(model));
-        if (!clock_model_matches(model))
-                return 0;
-
-        res = &sdev->resource[0];
-        addr = sbus_ioremap(res, 0, 0x800UL, "eeprom");
-
-        __clock_assign_common(addr, model);
 
-        return 1;
-}
-
-static int __init clock_probe_sbus(void)
-{
-        struct sbus_bus *sbus;
-
-        for_each_sbus(sbus) {
-                struct sbus_dev *sdev;
-
-                for_each_sbusdev(sdev, sbus) {
-                        if (clock_probe_one_sbus_dev(sbus, sdev))
-                                return 1;
-                }
-        }
+static struct of_device_id clock_match[] = {
+        {
+                .name = "eeprom",
+        },
+        {
+                .name = "rtc",
+        },
+        {},
+};
 
-        return 0;
-}
-#endif
+static struct of_platform_driver clock_driver = {
+        .name           = "clock",
+        .match_table    = clock_match,
+        .probe          = clock_probe,
+};
 
-void __init clock_probe(void)
+static int __init clock_init(void)
 {
-        static int invoked;
-        unsigned long flags;
-
-        if (invoked)
-                return;
-        invoked = 1;
-
         if (this_is_starfire) {
                 xtime.tv_sec = starfire_get_time();
                 xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
                 set_normalized_timespec(&wall_to_monotonic,
                                         -xtime.tv_sec, -xtime.tv_nsec);
-                return;
+                return 0;
         }
         if (tlb_type == hypervisor) {
                 xtime.tv_sec = hypervisor_get_time();
                 xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
                 set_normalized_timespec(&wall_to_monotonic,
                                         -xtime.tv_sec, -xtime.tv_nsec);
-                return;
-        }
-
-        /* Check FHC Central then EBUSs then ISA bridges then SBUSs.
-         * That way we handle the presence of multiple properly.
-         *
-         * As a special case, machines with Central must provide the
-         * timer chip there.
-         */
-        if (!clock_probe_central() &&
-#ifdef CONFIG_PCI
-            !clock_probe_ebus() &&
-            !clock_probe_isa() &&
-#endif
-#ifdef CONFIG_SBUS
-            !clock_probe_sbus()
-#endif
-                ) {
-                printk(KERN_WARNING "No clock chip found.\n");
-                return;
-        }
-
-        local_irq_save(flags);
-
-        if (mstk48t02_regs != NULL) {
-                /* Report a low battery voltage condition. */
-                if (has_low_battery())
-                        prom_printf("NVRAM: Low battery voltage!\n");
-
-                /* Kick start the clock if it is completely stopped. */
-                if (mostek_read(mstk48t02_regs + MOSTEK_SEC) & MSTK_STOP)
-                        kick_start_clock();
+                return 0;
         }
 
-        set_system_time();
-        
-        local_irq_restore(flags);
+        return of_register_driver(&clock_driver, &of_bus_type);
 }
 
+/* Must be after subsys_initcall() so that busses are probed.  Must
+ * be before device_initcall() because things like the RTC driver
+ * need to see the clock registers.
+ */
+fs_initcall(clock_init);
+
 /* This is gets the master TICK_INT timer going. */
 static unsigned long sparc64_init_timers(void)
 {