* Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu)
*/
-#include <linux/config.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <asm/timer.h>
#include <asm/irq.h>
#include <asm/io.h>
-#include <asm/sbus.h>
-#include <asm/fhc.h>
-#include <asm/pbm.h>
-#include <asm/ebus.h>
-#include <asm/isa.h>
+#include <asm/prom.h>
+#include <asm/of_device.h>
#include <asm/starfire.h>
#include <asm/smp.h>
#include <asm/sections.h>
return 1;
}
-static void __init __clock_assign_common(void __iomem *addr, char *model)
-{
- 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;
-
- 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)
+static int __devinit clock_probe(struct of_device *op, const struct of_device_id *match)
{
- 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);
+ struct device_node *dp = op->node;
+ char *model = of_get_property(dp, "model", NULL);
+ unsigned long size, flags;
+ void __iomem *regs;
- clock_assign_clk_reg(clk_reg, model);
- return 1;
+ if (!model || !clock_model_matches(model))
+ return -ENODEV;
- next_sibling:
- dp = dp->sibling;
- }
+ /* On an Enterprise system there can be multiple mostek clocks.
+ * We should only match the one that is on the central FHC bus.
+ */
+ if (!strcmp(dp->parent->name, "fhc") &&
+ strcmp(dp->parent->parent->name, "central") != 0)
+ 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
+#endif
+ 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;
+ printk(KERN_INFO "%s: Clock regs at %p\n", dp->full_name, regs);
- clock_isa_ebus_assign_regs(&edev->resource[0], model);
-
- 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)
{
__asm__ __volatile__("wrpr %0, 0x0, %%pstate"
: /* no outputs */
: "r" (pstate));
-
- local_irq_enable();
}
struct freq_table {
git.openpandora.org / pandora-kernel.git / blobdiff