diff options
Diffstat (limited to 'arch/arm/plat-mxc/time.c')
| -rw-r--r-- | arch/arm/plat-mxc/time.c | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/arch/arm/plat-mxc/time.c b/arch/arm/plat-mxc/time.c index 844567ee35fe..c1ce51abdba6 100644 --- a/arch/arm/plat-mxc/time.c +++ b/arch/arm/plat-mxc/time.c @@ -30,9 +30,15 @@ #include <asm/mach/time.h> #include <mach/common.h> +/* + * There are 2 versions of the timer hardware on Freescale MXC hardware. + * Version 1: MX1/MXL, MX21, MX27. + * Version 2: MX25, MX31, MX35, MX37, MX51 + */ + /* defines common for all i.MX */ #define MXC_TCTL 0x00 -#define MXC_TCTL_TEN (1 << 0) +#define MXC_TCTL_TEN (1 << 0) /* Enable module */ #define MXC_TPRER 0x04 /* MX1, MX21, MX27 */ @@ -47,8 +53,8 @@ #define MX2_TSTAT_CAPT (1 << 1) #define MX2_TSTAT_COMP (1 << 0) -/* MX31, MX35, MX25, MXC91231 */ -#define MX3_TCTL_WAITEN (1 << 3) +/* MX31, MX35, MX25, MXC91231, MX5 */ +#define MX3_TCTL_WAITEN (1 << 3) /* Wait enable mode */ #define MX3_TCTL_CLK_IPG (1 << 6) #define MX3_TCTL_FRR (1 << 9) #define MX3_IR 0x0c @@ -57,6 +63,9 @@ #define MX3_TCN 0x24 #define MX3_TCMP 0x10 +#define timer_is_v1() (cpu_is_mx1() || cpu_is_mx21() || cpu_is_mx27()) +#define timer_is_v2() (!timer_is_v1()) + static struct clock_event_device clockevent_mxc; static enum clock_event_mode clockevent_mode = CLOCK_EVT_MODE_UNUSED; @@ -66,7 +75,7 @@ static inline void gpt_irq_disable(void) { unsigned int tmp; - if (cpu_is_mx3() || cpu_is_mx25()) + if (timer_is_v2()) __raw_writel(0, timer_base + MX3_IR); else { tmp = __raw_readl(timer_base + MXC_TCTL); @@ -76,7 +85,7 @@ static inline void gpt_irq_disable(void) static inline void gpt_irq_enable(void) { - if (cpu_is_mx3() || cpu_is_mx25()) + if (timer_is_v2()) __raw_writel(1<<0, timer_base + MX3_IR); else { __raw_writel(__raw_readl(timer_base + MXC_TCTL) | MX1_2_TCTL_IRQEN, @@ -86,11 +95,13 @@ static inline void gpt_irq_enable(void) static void gpt_irq_acknowledge(void) { - if (cpu_is_mx1()) - __raw_writel(0, timer_base + MX1_2_TSTAT); - if (cpu_is_mx2()) - __raw_writel(MX2_TSTAT_CAPT | MX2_TSTAT_COMP, timer_base + MX1_2_TSTAT); - if (cpu_is_mx3() || cpu_is_mx25()) + if (timer_is_v1()) { + if (cpu_is_mx1()) + __raw_writel(0, timer_base + MX1_2_TSTAT); + else + __raw_writel(MX2_TSTAT_CAPT | MX2_TSTAT_COMP, + timer_base + MX1_2_TSTAT); + } else if (timer_is_v2()) __raw_writel(MX3_TSTAT_OF1, timer_base + MX3_TSTAT); } @@ -117,7 +128,7 @@ static int __init mxc_clocksource_init(struct clk *timer_clk) { unsigned int c = clk_get_rate(timer_clk); - if (cpu_is_mx3() || cpu_is_mx25()) + if (timer_is_v2()) clocksource_mxc.read = mx3_get_cycles; clocksource_mxc.mult = clocksource_hz2mult(c, @@ -180,7 +191,7 @@ static void mxc_set_mode(enum clock_event_mode mode, if (mode != clockevent_mode) { /* Set event time into far-far future */ - if (cpu_is_mx3() || cpu_is_mx25()) + if (timer_is_v2()) __raw_writel(__raw_readl(timer_base + MX3_TCN) - 3, timer_base + MX3_TCMP); else @@ -233,7 +244,7 @@ static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id) struct clock_event_device *evt = &clockevent_mxc; uint32_t tstat; - if (cpu_is_mx3() || cpu_is_mx25()) + if (timer_is_v2()) tstat = __raw_readl(timer_base + MX3_TSTAT); else tstat = __raw_readl(timer_base + MX1_2_TSTAT); @@ -264,7 +275,7 @@ static int __init mxc_clockevent_init(struct clk *timer_clk) { unsigned int c = clk_get_rate(timer_clk); - if (cpu_is_mx3() || cpu_is_mx25()) + if (timer_is_v2()) clockevent_mxc.set_next_event = mx3_set_next_event; clockevent_mxc.mult = div_sc(c, NSEC_PER_SEC, @@ -296,7 +307,7 @@ void __init mxc_timer_init(struct clk *timer_clk, void __iomem *base, int irq) __raw_writel(0, timer_base + MXC_TCTL); __raw_writel(0, timer_base + MXC_TPRER); /* see datasheet note */ - if (cpu_is_mx3() || cpu_is_mx25()) + if (timer_is_v2()) tctl_val = MX3_TCTL_CLK_IPG | MX3_TCTL_FRR | MX3_TCTL_WAITEN | MXC_TCTL_TEN; else tctl_val = MX1_2_TCTL_FRR | MX1_2_TCTL_CLK_PCLK1 | MXC_TCTL_TEN; |