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775d903216
The RTL9300 has a broken R4K MIPS timer interrupt, however, the R4K clocksource works. We replace the RTL9300 timer with a Clock Event Timer (CEVT), which is VSMP aware and can be instantiated as part of brining a VSMTP cpu up instead of the R4K CEVT source. For this we place the RTL9300 CEVT timer in arch/mips/kernel together with other MIPS CEVT timers, initialize the SoC IRQs from a modified smp-mt.c and instantiate each timer as part of the MIPS time setup in arch/mips/include/asm/time.h instead of the R4K CEVT, similarly as is done by other MIPS CEVT timers. Signed-off-by: Birger Koblitz <git@birger-koblitz.de>
55 lines
1.5 KiB
Diff
55 lines
1.5 KiB
Diff
--- a/arch/mips/kernel/Makefile
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+++ b/arch/mips/kernel/Makefile
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@@ -27,6 +27,7 @@ obj-$(CONFIG_CEVT_BCM1480) += cevt-bcm14
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obj-$(CONFIG_CEVT_R4K) += cevt-r4k.o
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obj-$(CONFIG_CEVT_DS1287) += cevt-ds1287.o
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obj-$(CONFIG_CEVT_GT641XX) += cevt-gt641xx.o
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+obj-$(CONFIG_CEVT_RTL9300) += cevt-rtl9300.o
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obj-$(CONFIG_CEVT_SB1250) += cevt-sb1250.o
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obj-$(CONFIG_CEVT_TXX9) += cevt-txx9.o
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obj-$(CONFIG_CSRC_BCM1480) += csrc-bcm1480.o
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--- a/arch/mips/include/asm/time.h
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+++ b/arch/mips/include/asm/time.h
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@@ -15,6 +15,8 @@
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#include <linux/clockchips.h>
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#include <linux/clocksource.h>
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+extern void rtl9300_clockevent_init(void);
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+
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extern spinlock_t rtc_lock;
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/*
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@@ -43,6 +45,11 @@ extern int r4k_clockevent_init(void);
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static inline int mips_clockevent_init(void)
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{
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+#ifdef CONFIG_CEVT_RTL9300
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+ rtl9300_clockevent_init();
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+ return 0;
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+#endif
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+
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#ifdef CONFIG_CEVT_R4K
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return r4k_clockevent_init();
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#else
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--- a/arch/mips/kernel/smp-mt.c
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+++ b/arch/mips/kernel/smp-mt.c
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@@ -108,12 +108,18 @@ static void __init smvp_tc_init(unsigned
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static void vsmp_init_secondary(void)
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{
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/* This is Malta specific: IPI,performance and timer interrupts */
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+
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+ /* RTL9300 Clear internal timer interrupt */
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+ write_c0_compare(0);
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+
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if (mips_gic_present())
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change_c0_status(ST0_IM, STATUSF_IP2 | STATUSF_IP3 |
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STATUSF_IP4 | STATUSF_IP5 |
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STATUSF_IP6 | STATUSF_IP7);
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else
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change_c0_status(ST0_IM, STATUSF_IP0 | STATUSF_IP1 |
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+ STATUSF_IP2 | STATUSF_IP3 |
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+ STATUSF_IP4 | STATUSF_IP5 |
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STATUSF_IP6 | STATUSF_IP7);
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}
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