[PATCH] ppc64: consolidate calibrate_decr implementations

pSeries and maple have almost the same code for calibrate_decr,
and BPA would need yet another copy. Instead, I'm moving the
code to arch/ppc64/kernel/time.c.

Some of the related declarations were missing from header
files, so I'm moving those as well.

It makes sense to merge this with the pmac function of the
same name, so we end up having just one implemetation for
iSeries and one for Open Firmware based machines.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 1 insertions, 68 deletions

diff --git a/arch/ppc64/kernel/pSeries_setup.c b/arch/ppc64/kernel/pSeries_setup.c
index 6c0d1d58a552..f9a310c0c8d7 100644
--- a/arch/ppc64/kernel/pSeries_setup.c
+++ b/arch/ppc64/kernel/pSeries_setup.c
@@ -84,9 +84,6 @@ extern void generic_find_legacy_serial_ports(u64 *physport,
 
 int fwnmi_active;  /* TRUE if an FWNMI handler is present */
 
-extern unsigned long ppc_proc_freq;
-extern unsigned long ppc_tb_freq;
-
 extern void pSeries_system_reset_exception(struct pt_regs *regs);
 extern int pSeries_machine_check_exception(struct pt_regs *regs);
 
@@ -482,70 +479,6 @@ static void pSeries_progress(char *s, unsigned short hex)
         spin_unlock(&progress_lock);
 }
 
-extern void setup_default_decr(void);
-
-/* Some sane defaults: 125 MHz timebase, 1GHz processor */
-#define DEFAULT_TB_FREQ         125000000UL
-#define DEFAULT_PROC_FREQ       (DEFAULT_TB_FREQ * 8)
-
-static void __init pSeries_calibrate_decr(void)
-{
-        struct device_node *cpu;
-        struct div_result divres;
-        unsigned int *fp;
-        int node_found;
-
-        /*
-         * The cpu node should have a timebase-frequency property
-         * to tell us the rate at which the decrementer counts.
-         */
-        cpu = of_find_node_by_type(NULL, "cpu");
-
-        ppc_tb_freq = DEFAULT_TB_FREQ;          /* hardcoded default */
-        node_found = 0;
-        if (cpu != 0) {
-                fp = (unsigned int *)get_property(cpu, "timebase-frequency",
-                                                  NULL);
-                if (fp != 0) {
-                        node_found = 1;
-                        ppc_tb_freq = *fp;
-                }
-        }
-        if (!node_found)
-                printk(KERN_ERR "WARNING: Estimating decrementer frequency "
-                                "(not found)\n");
-
-        ppc_proc_freq = DEFAULT_PROC_FREQ;
-        node_found = 0;
-        if (cpu != 0) {
-                fp = (unsigned int *)get_property(cpu, "clock-frequency",
-                                                  NULL);
-                if (fp != 0) {
-                        node_found = 1;
-                        ppc_proc_freq = *fp;
-                }
-        }
-        if (!node_found)
-                printk(KERN_ERR "WARNING: Estimating processor frequency "
-                                "(not found)\n");
-
-        of_node_put(cpu);
-
-        printk(KERN_INFO "time_init: decrementer frequency = %lu.%.6lu MHz\n",
-               ppc_tb_freq/1000000, ppc_tb_freq%1000000);
-        printk(KERN_INFO "time_init: processor frequency   = %lu.%.6lu MHz\n",
-               ppc_proc_freq/1000000, ppc_proc_freq%1000000);
-
-        tb_ticks_per_jiffy = ppc_tb_freq / HZ;
-        tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
-        tb_ticks_per_usec = ppc_tb_freq / 1000000;
-        tb_to_us = mulhwu_scale_factor(ppc_tb_freq, 1000000);
-        div128_by_32(1024*1024, 0, tb_ticks_per_sec, &divres);
-        tb_to_xs = divres.result_low;
-
-        setup_default_decr();
-}
-
 static int pSeries_check_legacy_ioport(unsigned int baseport)
 {
         struct device_node *np;
@@ -604,7 +537,7 @@ struct machdep_calls __initdata pSeries_md = {
         .get_boot_time          = pSeries_get_boot_time,
         .get_rtc_time           = pSeries_get_rtc_time,
         .set_rtc_time           = pSeries_set_rtc_time,
-        .calibrate_decr         = pSeries_calibrate_decr,
+        .calibrate_decr         = generic_calibrate_decr,
         .progress               = pSeries_progress,
         .check_legacy_ioport    = pSeries_check_legacy_ioport,
         .system_reset_exception = pSeries_system_reset_exception,