diff options
Diffstat (limited to 'arch/arm/mach-at91')
| -rw-r--r-- | arch/arm/mach-at91/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/mach-at91/at91sam926x_time.c | 108 | ||||
| -rw-r--r-- | arch/arm/mach-at91/board-dt-sam9.c | 3 | ||||
| -rw-r--r-- | arch/arm/mach-at91/board-dt-sama5.c | 3 |
4 files changed, 51 insertions, 64 deletions
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig index 6eb3c658761d..c3f9ebc5f9f5 100644 --- a/arch/arm/mach-at91/Kconfig +++ b/arch/arm/mach-at91/Kconfig @@ -34,6 +34,7 @@ config OLD_IRQ_AT91 select SPARSE_IRQ config AT91_SAM9_TIME + select CLKSRC_OF if OF bool config HAVE_AT91_SMD diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c index b87a12f05540..af466eb68624 100644 --- a/arch/arm/mach-at91/at91sam926x_time.c +++ b/arch/arm/mach-at91/at91sam926x_time.c @@ -19,7 +19,6 @@ #include <linux/of_address.h> #include <linux/of_irq.h> -#include <asm/mach/time.h> #include <mach/hardware.h> #define AT91_PIT_MR 0x00 /* Mode Register */ @@ -176,81 +175,21 @@ static struct irqaction at91sam926x_pit_irq = { .name = "at91_tick", .flags = IRQF_SHARED | IRQF_TIMER | IRQF_IRQPOLL, .handler = at91sam926x_pit_interrupt, - .irq = NR_IRQS_LEGACY + AT91_ID_SYS, }; -#ifdef CONFIG_OF -static struct of_device_id pit_timer_ids[] = { - { .compatible = "atmel,at91sam9260-pit" }, - { /* sentinel */ } -}; - -static int __init of_at91sam926x_pit_init(void) -{ - struct device_node *np; - int ret; - - np = of_find_matching_node(NULL, pit_timer_ids); - if (!np) - goto err; - - pit_base_addr = of_iomap(np, 0); - if (!pit_base_addr) - goto node_err; - - mck = of_clk_get(np, 0); - - /* Get the interrupts property */ - ret = irq_of_parse_and_map(np, 0); - if (!ret) { - pr_crit("AT91: PIT: Unable to get IRQ from DT\n"); - if (!IS_ERR(mck)) - clk_put(mck); - goto ioremap_err; - } - at91sam926x_pit_irq.irq = ret; - - of_node_put(np); - - return 0; - -ioremap_err: - iounmap(pit_base_addr); -node_err: - of_node_put(np); -err: - return -EINVAL; -} -#else -static int __init of_at91sam926x_pit_init(void) -{ - return -EINVAL; -} -#endif - /* * Set up both clocksource and clockevent support. */ -void __init at91sam926x_pit_init(void) +static void __init at91sam926x_pit_common_init(void) { unsigned long pit_rate; unsigned bits; int ret; - mck = ERR_PTR(-ENOENT); - - /* For device tree enabled device: initialize here */ - of_at91sam926x_pit_init(); - /* * Use our actual MCK to figure out how many MCK/16 ticks per * 1/HZ period (instead of a compile-time constant LATCH). */ - if (IS_ERR(mck)) - mck = clk_get(NULL, "mck"); - - if (IS_ERR(mck)) - panic("AT91: PIT: Unable to get mck clk\n"); pit_rate = clk_get_rate(mck) / 16; pit_cycle = DIV_ROUND_CLOSEST(pit_rate, HZ); WARN_ON(((pit_cycle - 1) & ~AT91_PIT_PIV) != 0); @@ -277,6 +216,51 @@ void __init at91sam926x_pit_init(void) clockevents_register_device(&pit_clkevt); } +static void __init at91sam926x_pit_dt_init(struct device_node *node) +{ + unsigned int irq; + + pit_base_addr = of_iomap(node, 0); + if (!pit_base_addr) + return; + + mck = of_clk_get(node, 0); + if (IS_ERR(mck)) + /* Fallback on clkdev for !CCF-based boards */ + mck = clk_get(NULL, "mck"); + + if (IS_ERR(mck)) + panic("AT91: PIT: Unable to get mck clk\n"); + + /* Get the interrupts property */ + irq = irq_of_parse_and_map(node, 0); + if (!irq) { + pr_crit("AT91: PIT: Unable to get IRQ from DT\n"); + goto clk_err; + } + + at91sam926x_pit_irq.irq = irq; + + at91sam926x_pit_common_init(); + +clk_err: + clk_put(mck); + iounmap(pit_base_addr); +} +CLOCKSOURCE_OF_DECLARE(at91sam926x_pit, "atmel,at91sam9260-pit", + at91sam926x_pit_dt_init); + +void __init at91sam926x_pit_init(void) +{ + mck = clk_get(NULL, "mck"); + if (IS_ERR(mck)) + panic("AT91: PIT: Unable to get mck clk\n"); + + at91sam926x_pit_irq.irq = NR_IRQS_LEGACY + AT91_ID_SYS; + + at91sam926x_pit_common_init(); +} + void __init at91sam926x_ioremap_pit(u32 addr) { if (of_have_populated_dt()) diff --git a/arch/arm/mach-at91/board-dt-sam9.c b/arch/arm/mach-at91/board-dt-sam9.c index dfa8d48146fe..78962fd23859 100644 --- a/arch/arm/mach-at91/board-dt-sam9.c +++ b/arch/arm/mach-at91/board-dt-sam9.c @@ -14,6 +14,7 @@ #include <linux/of.h> #include <linux/of_irq.h> #include <linux/clk-provider.h> +#include <linux/clocksource.h> #include <asm/setup.h> #include <asm/irq.h> @@ -31,7 +32,7 @@ static void __init sam9_dt_timer_init(void) #if defined(CONFIG_COMMON_CLK) of_clk_init(NULL); #endif - at91sam926x_pit_init(); + clocksource_of_init(); } static const char *at91_dt_board_compat[] __initdata = { diff --git a/arch/arm/mach-at91/board-dt-sama5.c b/arch/arm/mach-at91/board-dt-sama5.c index d6fe04bcaabd..4f01e34fae0a 100644 --- a/arch/arm/mach-at91/board-dt-sama5.c +++ b/arch/arm/mach-at91/board-dt-sama5.c @@ -17,6 +17,7 @@ #include <linux/of_platform.h> #include <linux/phy.h> #include <linux/clk-provider.h> +#include <linux/clocksource.h> #include <asm/setup.h> #include <asm/irq.h> @@ -32,7 +33,7 @@ static void __init sama5_dt_timer_init(void) #if defined(CONFIG_COMMON_CLK) of_clk_init(NULL); #endif - at91sam926x_pit_init(); + clocksource_of_init(); } static int ksz9021rn_phy_fixup(struct phy_device *phy) |