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99a8170652
The AT91 clock drivers make use of IRQs to avoid polling when waiting for some clocks to be enabled. Unfortunately, this leads to a crash when those IRQs are threaded (which happens when using preempt-rt) because they are registered before thread creation is possible. Use polling on those clocks instead to avoid the problem. Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
42 lines
904 B
C
42 lines
904 B
C
/*
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* drivers/clk/at91/pmc.h
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*
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* Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __PMC_H_
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#define __PMC_H_
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#include <linux/io.h>
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#include <linux/irqdomain.h>
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#include <linux/regmap.h>
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#include <linux/spinlock.h>
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extern spinlock_t pmc_pcr_lock;
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struct clk_range {
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unsigned long min;
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unsigned long max;
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};
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#define CLK_RANGE(MIN, MAX) {.min = MIN, .max = MAX,}
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struct at91_pmc_caps {
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u32 available_irqs;
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};
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struct at91_pmc {
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struct regmap *regmap;
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const struct at91_pmc_caps *caps;
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};
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int of_at91_get_clk_range(struct device_node *np, const char *propname,
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struct clk_range *range);
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#endif /* __PMC_H_ */
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