diff options
Diffstat (limited to 'arch/sparc/kernel/time.c')
-rw-r--r-- | arch/sparc/kernel/time.c | 110 |
1 files changed, 40 insertions, 70 deletions
diff --git a/arch/sparc/kernel/time.c b/arch/sparc/kernel/time.c index 7dadcdb4ca42..04eb1eab6e3e 100644 --- a/arch/sparc/kernel/time.c +++ b/arch/sparc/kernel/time.c @@ -15,7 +15,6 @@ * 1997-09-10 Updated NTP code according to technical memorandum Jan '96 * "A Kernel Model for Precision Timekeeping" by Dave Mills */ -#include <linux/config.h> #include <linux/errno.h> #include <linux/module.h> #include <linux/sched.h> @@ -42,6 +41,7 @@ #include <asm/sun4paddr.h> #include <asm/page.h> #include <asm/pcic.h> +#include <asm/of_device.h> extern unsigned long wall_jiffies; @@ -273,83 +273,31 @@ 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 +306,28 @@ 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 +346,7 @@ void __init sbus_time_init(void) if (ARCH_SUN4) sun4_clock_probe(); else - clock_probe(); + clock_init(); sparc_init_timers(timer_interrupt); |