David VomLehn wrote:
diff --git a/arch/mips/powertv/cevt-powertv.c b/arch/mips/powertv/cevt-powertv.c
[...]
+static int mips_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ unsigned int cnt;
+ int res;
+
+#ifdef CONFIG_MIPS_MT_SMTC
+ {
+ unsigned long flags, vpflags;
+ local_irq_save(flags);
+ vpflags = dvpe();
+#endif
+ cnt = read_c0_count();
+ cnt += delta;
+ write_c0_compare(cnt);
+ res = ((int)(read_c0_count() - cnt) > 0) ? -ETIME : 0;
+#ifdef CONFIG_MIPS_MT_SMTC
+ evpe(vpflags);
+ local_irq_restore(flags);
+ }
+#endif
+ return res;
Does this cpu have MIPS_MT? If not you could remove the #ifdef
(actually you could remove it in any case).
[...]
diff --git a/arch/mips/powertv/csrc-powertv.c b/arch/mips/powertv/csrc-powertv.c
new file mode 100644
index 0000000..c032660
--- /dev/null
+++ b/arch/mips/powertv/csrc-powertv.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2008 Scientific-Atlanta, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+/*
+ * The file comes from kernel/csrc-r4k.c
+ */
Could you just use kernel/csrc-r4k.c, and move your mips_get_pll_freq()
to a different file (init.c or time.c)?
+#include <linux/clocksource.h>
+#include <linux/init.h>
+
+#include <asm/time.h> /* Not included in linux/time.h */
+
+#include <asm/mach-powertv/asic_regs.h>
+#include "powertv-clock.h"
+
+/* MIPS PLL Register Definitions */
+#define PLL_GET_M(x) (((x) >> 8) & 0x000000FF)
+#define PLL_GET_N(x) (((x) >> 16) & 0x000000FF)
+#define PLL_GET_P(x) (((x) >> 24) & 0x00000007)
+
+/*
+ * returns: Clock frequency in kHz
+ */
+unsigned int __init mips_get_pll_freq(void)
+{
+ unsigned int pll_reg, m, n, p;
+ unsigned int fin = 54000; /* Base frequency in kHz */
+ unsigned int fout;
+
+ /* Read PLL register setting */
+ pll_reg = asic_read(MIPS_PLL_SETUP);
+ m = PLL_GET_M(pll_reg);
+ n = PLL_GET_N(pll_reg);
+ p = PLL_GET_P(pll_reg);
+ pr_info("MIPS PLL Register:0x%x M=%d N=%d P=%d\n", pll_reg, m, n, p);
+
+ /* Calculate clock frequency = (2 * N * 54MHz) / (M * (2**P)) */
+ fout = ((2 * n * fin) / (m * (0x01 << p)));
+
+ pr_info("MIPS Clock Freq=%d kHz\n", fout);
+
+ return fout;
+}
+
+static cycle_t c0_hpt_read(struct clocksource *cs)
+{
+ return read_c0_count();
+}
+
+static struct clocksource clocksource_mips = {
+ .name = "powertv-counter",
+ .read = c0_hpt_read,
+ .mask = CLOCKSOURCE_MASK(32),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+void __init powertv_clocksource_init(void)
+{
+ unsigned int pll_freq = mips_get_pll_freq();
+
+ pr_info("CPU frequency %d.%02d MHz\n", pll_freq / 1000,
+ (pll_freq % 1000) * 100 / 1000);
+
+ mips_hpt_frequency = pll_freq / 2 * 1000;
+
+ clocksource_mips.rating = 200 + mips_hpt_frequency / 10000000;
+
+ clocksource_set_clock(&clocksource_mips, mips_hpt_frequency);
+
+ clocksource_register(&clocksource_mips);
+}
