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6405616754
On OMAP24xx, the polarity for the IDLEST bits is opposite of OMAP3. The mask used to check this was using the bit position instead of the bit mask. This patch fixes the problem by using the bit mask instead of the bit field. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Paul Walmsley <paul@pwsan.com>
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
/*
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* OMAP2/3 CM module functions
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*
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* Copyright (C) 2009 Nokia Corporation
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* Paul Walmsley
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <asm/atomic.h>
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#include <plat/common.h>
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#include "cm.h"
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#include "cm-regbits-24xx.h"
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#include "cm-regbits-34xx.h"
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static const u8 cm_idlest_offs[] = {
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CM_IDLEST1, CM_IDLEST2, OMAP2430_CM_IDLEST3
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};
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/**
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* omap2_cm_wait_idlest_ready - wait for a module to leave idle or standby
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* @prcm_mod: PRCM module offset
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* @idlest_id: CM_IDLESTx register ID (i.e., x = 1, 2, 3)
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* @idlest_shift: shift of the bit in the CM_IDLEST* register to check
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*
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* XXX document
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*/
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int omap2_cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift)
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{
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int ena = 0, i = 0;
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u8 cm_idlest_reg;
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u32 mask;
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if (!idlest_id || (idlest_id > ARRAY_SIZE(cm_idlest_offs)))
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return -EINVAL;
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cm_idlest_reg = cm_idlest_offs[idlest_id - 1];
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mask = 1 << idlest_shift;
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if (cpu_is_omap24xx())
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ena = mask;
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else if (cpu_is_omap34xx())
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ena = 0;
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else
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BUG();
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/* XXX should be OMAP2 CM */
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omap_test_timeout(((cm_read_mod_reg(prcm_mod, cm_idlest_reg) & mask) == ena),
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MAX_MODULE_READY_TIME, i);
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return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY;
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}
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