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authorLinus Torvalds <torvalds@woody.osdl.org>2007-01-08 23:07:31 (GMT)
committerLinus Torvalds <torvalds@woody.osdl.org>2007-01-08 23:07:31 (GMT)
commit86302f417561fec802f88fdfc343265689d4a596 (patch)
tree7fb35e3ba6a54f64316aeb0f4b4fc9947b1c0691 /arch/mips/philips/pnx8550/common/time.c
parent74bda9310fe9776f3d940057ac2e7881214577d6 (diff)
parent2dbda7dceca81adfe57c8884be5c66e70822d89a (diff)
downloadlinux-fsl-qoriq-86302f417561fec802f88fdfc343265689d4a596.tar.xz
Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] PNX8550: Fix system timer support [MIPS] TX49: Fix use of CDEX build_store_reg() [MIPS] pnx8550: Fix write_config_byte() PCI config space accessor [MIPS] Fix build errors on SEAD [MIPS] SMTC build fix [MIPS] csum_partial and copy in parallel [MIPS] Malta: Add missing MTD file.
Diffstat (limited to 'arch/mips/philips/pnx8550/common/time.c')
-rw-r--r--arch/mips/philips/pnx8550/common/time.c44
1 files changed, 37 insertions, 7 deletions
diff --git a/arch/mips/philips/pnx8550/common/time.c b/arch/mips/philips/pnx8550/common/time.c
index 65c440e..f80acae 100644
--- a/arch/mips/philips/pnx8550/common/time.c
+++ b/arch/mips/philips/pnx8550/common/time.c
@@ -33,7 +33,17 @@
#include <int.h>
#include <cm.h>
-extern unsigned int mips_hpt_frequency;
+static unsigned long cpj;
+
+static cycle_t hpt_read(void)
+{
+ return read_c0_count2();
+}
+
+static void timer_ack(void)
+{
+ write_c0_compare(cpj);
+}
/*
* pnx8550_time_init() - it does the following things:
@@ -68,27 +78,47 @@ void pnx8550_time_init(void)
* HZ timer interrupts per second.
*/
mips_hpt_frequency = 27UL * ((1000000UL * n)/(m * pow2p));
+ cpj = (mips_hpt_frequency + HZ / 2) / HZ;
+ timer_ack();
+
+ /* Setup Timer 2 */
+ write_c0_count2(0);
+ write_c0_compare2(0xffffffff);
+
+ clocksource_mips.read = hpt_read;
+ mips_timer_ack = timer_ack;
+}
+
+static irqreturn_t monotonic_interrupt(int irq, void *dev_id)
+{
+ /* Timer 2 clear interrupt */
+ write_c0_compare2(-1);
+ return IRQ_HANDLED;
}
+static struct irqaction monotonic_irqaction = {
+ .handler = monotonic_interrupt,
+ .flags = IRQF_DISABLED,
+ .name = "Monotonic timer",
+};
+
void __init plat_timer_setup(struct irqaction *irq)
{
int configPR;
setup_irq(PNX8550_INT_TIMER1, irq);
+ setup_irq(PNX8550_INT_TIMER2, &monotonic_irqaction);
- /* Start timer1 */
+ /* Timer 1 start */
configPR = read_c0_config7();
configPR &= ~0x00000008;
write_c0_config7(configPR);
- /* Timer 2 stop */
+ /* Timer 2 start */
configPR = read_c0_config7();
- configPR |= 0x00000010;
+ configPR &= ~0x00000010;
write_c0_config7(configPR);
- write_c0_count2(0);
- write_c0_compare2(0xffffffff);
-
/* Timer 3 stop */
configPR = read_c0_config7();
configPR |= 0x00000020;