First step to upgrade of brcm47xx to kernel version 2.6.25

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10939 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 62 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/files-2.6.25/arch/mips/bcm947xx/time.c b/target/linux/brcm47xx/files-2.6.25/arch/mips/bcm947xx/time.c
new file mode 100644
index 000000000..62120ebc7
--- /dev/null
+++ b/target/linux/brcm47xx/files-2.6.25/arch/mips/bcm947xx/time.c
@@ -0,0 +1,62 @@
+/*
+ *  Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
+ *
+ *  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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  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.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/serial_reg.h>
+#include <linux/interrupt.h>
+#include <linux/ssb/ssb.h>
+#include <asm/addrspace.h>
+#include <asm/io.h>
+#include <asm/time.h>
+
+extern struct ssb_bus ssb;
+
+void __init
+bcm47xx_time_init(void)
+{
+	unsigned long hz;
+
+	/*
+	 * Use deterministic values for initial counter interrupt
+	 * so that calibrate delay avoids encountering a counter wrap.
+	 */
+	write_c0_count(0);
+	write_c0_compare(0xffff);
+
+	hz = ssb_cpu_clock(&ssb.mipscore) / 2;
+	if (!hz)
+		hz = 100000000;
+
+	/* Set MIPS counter frequency for fixed_rate_gettimeoffset() */
+	mips_hpt_frequency = hz;
+}
+
+void __init
+plat_timer_setup(struct irqaction *irq)
+{
+	/* Enable the timer interrupt */
+	setup_irq(7, irq);
+}