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2db5a93d21
This patch prepare the transition to common clk for sam9 dt boards by replacing the timer init callback. Clocks registration cannot be done in early init callback (as formerly done by the old clk implementation) because it requires dynamic allocation which is not ready yet during early init. In the other hand, at91 clocks must be registered before at91sam926x_pit_init is called because PIT (Periodic Interval Timer) driver request the master clk (mck). A new function (at91sam9_dt_timer_init) is created to fullfil these needs. This function registers all at91 clks using the dt definition before calling the PIT init function. The device tree clock registration is enabled only if common clk is selected. Else the old clk registration is been done during at91_dt_initialize call. Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
/*
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* Setup code for AT91SAM Evaluation Kits with Device Tree support
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*
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* Copyright (C) 2011 Atmel,
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* 2011 Nicolas Ferre <nicolas.ferre@atmel.com>
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*
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* Licensed under GPLv2 or later.
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*/
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/gpio.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <linux/clk-provider.h>
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#include <asm/setup.h>
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#include <asm/irq.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include "at91_aic.h"
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#include "board.h"
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#include "generic.h"
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static void __init sam9_dt_timer_init(void)
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{
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#if defined(CONFIG_COMMON_CLK)
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of_clk_init(NULL);
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#endif
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at91sam926x_pit_init();
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}
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static const struct of_device_id irq_of_match[] __initconst = {
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{ .compatible = "atmel,at91rm9200-aic", .data = at91_aic_of_init },
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{ /*sentinel*/ }
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};
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static void __init at91_dt_init_irq(void)
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{
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of_irq_init(irq_of_match);
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}
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static const char *at91_dt_board_compat[] __initdata = {
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"atmel,at91sam9",
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NULL
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};
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DT_MACHINE_START(at91sam_dt, "Atmel AT91SAM (Device Tree)")
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/* Maintainer: Atmel */
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.init_time = sam9_dt_timer_init,
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.map_io = at91_map_io,
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.handle_irq = at91_aic_handle_irq,
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.init_early = at91_dt_initialize,
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.init_irq = at91_dt_init_irq,
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.dt_compat = at91_dt_board_compat,
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MACHINE_END
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