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author | Felix Fietkau <nbd@openwrt.org> | 2014-11-27 16:24:32 +0000 |
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committer | Felix Fietkau <nbd@openwrt.org> | 2014-11-27 16:24:32 +0000 |
commit | 4c369cdb9df368e62c088380f5bb02057c584e58 (patch) | |
tree | 3d25051a834952d4f3b4cef11e972aa86ddcf173 /target/linux/cns3xxx/patches-3.18/090-timers.patch | |
parent | 41fb5fcd1f747594b96174d8695980a8a3974275 (diff) | |
download | master-187ad058-4c369cdb9df368e62c088380f5bb02057c584e58.tar.gz master-187ad058-4c369cdb9df368e62c088380f5bb02057c584e58.tar.bz2 master-187ad058-4c369cdb9df368e62c088380f5bb02057c584e58.zip |
cns3xxx: add experimental 3.18 support
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43406 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/cns3xxx/patches-3.18/090-timers.patch')
-rw-r--r-- | target/linux/cns3xxx/patches-3.18/090-timers.patch | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/target/linux/cns3xxx/patches-3.18/090-timers.patch b/target/linux/cns3xxx/patches-3.18/090-timers.patch new file mode 100644 index 0000000000..2bddc1f67b --- /dev/null +++ b/target/linux/cns3xxx/patches-3.18/090-timers.patch @@ -0,0 +1,104 @@ +--- a/arch/arm/mach-cns3xxx/core.c ++++ b/arch/arm/mach-cns3xxx/core.c +@@ -135,12 +135,13 @@ static void cns3xxx_timer_set_mode(enum + + switch (mode) { + case CLOCK_EVT_MODE_PERIODIC: +- reload = pclk * 20 / (3 * HZ) * 0x25000; ++ reload = pclk * 1000000 / HZ; + writel(reload, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET); + ctrl |= (1 << 0) | (1 << 2) | (1 << 9); + break; + case CLOCK_EVT_MODE_ONESHOT: + /* period set, and timer enabled in 'next_event' hook */ ++ writel(0, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET); + ctrl |= (1 << 2) | (1 << 9); + break; + case CLOCK_EVT_MODE_UNUSED: +@@ -168,7 +169,7 @@ static struct clock_event_device cns3xxx + .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, + .set_mode = cns3xxx_timer_set_mode, + .set_next_event = cns3xxx_timer_set_next_event, +- .rating = 350, ++ .rating = 300, + .cpumask = cpu_all_mask, + }; + +@@ -215,6 +216,35 @@ static void __init cns3xxx_init_twd(void + #endif + } + ++static cycle_t cns3xxx_get_cycles(struct clocksource *cs) ++{ ++ u64 val; ++ ++ val = readl(cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET); ++ val &= 0xffff; ++ ++ return ((val << 32) | readl(cns3xxx_tmr1 + TIMER_FREERUN_OFFSET)); ++} ++ ++static struct clocksource clocksource_cns3xxx = { ++ .name = "freerun", ++ .rating = 200, ++ .read = cns3xxx_get_cycles, ++ .mask = CLOCKSOURCE_MASK(48), ++ .shift = 16, ++ .flags = CLOCK_SOURCE_IS_CONTINUOUS, ++}; ++ ++static void __init cns3xxx_clocksource_init(void) ++{ ++ /* Reset the FreeRunning counter */ ++ writel((1 << 16), cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET); ++ ++ clocksource_cns3xxx.mult = ++ clocksource_khz2mult(100, clocksource_cns3xxx.shift); ++ clocksource_register(&clocksource_cns3xxx); ++} ++ + /* + * Set up the clock source and clock events devices + */ +@@ -232,13 +262,12 @@ static void __init __cns3xxx_timer_init( + /* stop free running timer3 */ + writel(0, cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET); + +- /* timer1 */ +- writel(0x5C800, cns3xxx_tmr1 + TIMER1_COUNTER_OFFSET); +- writel(0x5C800, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET); +- + writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V1_OFFSET); + writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V2_OFFSET); + ++ val = (cns3xxx_cpu_clock() >> 3) * 1000000 / HZ; ++ writel(val, cns3xxx_tmr1 + TIMER1_COUNTER_OFFSET); ++ + /* mask irq, non-mask timer1 overflow */ + irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET); + irq_mask &= ~(1 << 2); +@@ -250,23 +279,9 @@ static void __init __cns3xxx_timer_init( + val |= (1 << 9); + writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); + +- /* timer2 */ +- writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V1_OFFSET); +- writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V2_OFFSET); +- +- /* mask irq */ +- irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET); +- irq_mask |= ((1 << 3) | (1 << 4) | (1 << 5)); +- writel(irq_mask, cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET); +- +- /* down counter */ +- val = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); +- val |= (1 << 10); +- writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); +- +- /* Make irqs happen for the system timer */ + setup_irq(timer_irq, &cns3xxx_timer_irq); + ++ cns3xxx_clocksource_init(); + cns3xxx_clockevents_init(timer_irq); + cns3xxx_init_twd(); + } |