forked from Minki/linux
11b10341bd
It is mandatory to wait for a module to be in disabled state before potentially disabling source clock or re-asserting a reset. omap_hwmod_idle and omap_hwmod_shutdown does not wait for the module to be fully idle. Add a cm_xxx accessor to wait the clkctrl idle status to be disabled. Fix hwmod_[idle|shutdown] to use this API. Based on Rajendra's initial patch. Please note that most interconnects hwmod will return one timeout because it is impossible for them to be in idle since the processor is accessing the registers though the interconnect. Signed-off-by: Benoit Cousson <b-cousson@ti.com> Signed-off-by: Rajendra Nayak <rnayak@ti.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Todd Poynor <toddpoynor@google.com> [paul@pwsan.com: move cpu_is_*() tests to the top of _wait_target_disable(); incorporate some feedback from Todd] Signed-off-by: Paul Walmsley <paul@pwsan.com>
39 lines
1.6 KiB
C
39 lines
1.6 KiB
C
/*
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* OMAP4 Clock Management (CM) function prototypes
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*
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* Copyright (C) 2010 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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#ifndef __ARCH_ASM_MACH_OMAP2_CMINST44XX_H
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#define __ARCH_ASM_MACH_OMAP2_CMINST44XX_H
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extern bool omap4_cminst_is_clkdm_in_hwsup(u8 part, s16 inst, u16 cdoffs);
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extern void omap4_cminst_clkdm_enable_hwsup(u8 part, s16 inst, u16 cdoffs);
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extern void omap4_cminst_clkdm_disable_hwsup(u8 part, s16 inst, u16 cdoffs);
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extern void omap4_cminst_clkdm_force_sleep(u8 part, s16 inst, u16 cdoffs);
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extern void omap4_cminst_clkdm_force_wakeup(u8 part, s16 inst, u16 cdoffs);
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extern int omap4_cminst_wait_module_ready(u8 part, u16 inst, s16 cdoffs, u16 clkctrl_offs);
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extern int omap4_cminst_wait_module_idle(u8 part, u16 inst, s16 cdoffs, u16 clkctrl_offs);
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/*
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* In an ideal world, we would not export these low-level functions,
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* but this will probably take some time to fix properly
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*/
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extern u32 omap4_cminst_read_inst_reg(u8 part, s16 inst, u16 idx);
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extern void omap4_cminst_write_inst_reg(u32 val, u8 part, s16 inst, u16 idx);
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extern u32 omap4_cminst_rmw_inst_reg_bits(u32 mask, u32 bits, u8 part,
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s16 inst, s16 idx);
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extern u32 omap4_cminst_set_inst_reg_bits(u32 bits, u8 part, s16 inst,
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s16 idx);
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extern u32 omap4_cminst_clear_inst_reg_bits(u32 bits, u8 part, s16 inst,
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s16 idx);
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extern u32 omap4_cminst_read_inst_reg_bits(u8 part, u16 inst, s16 idx,
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u32 mask);
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#endif
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