5b74c67660
struct clockdomain contains a struct powerdomain *pwrdm and const char
*pwrdm_name. The pwrdm_name is only used at initialization to look up
the appropriate pwrdm pointer. Combining these into a union saves
about 100 bytes on 3430SDP. This patch should not cause any change in
kernel function.
Updated to gracefully handle autodeps that contain invalid powerdomains,
per Russell King's review comments.
Boot-tested on BeagleBoard ES2.1.
linux-omap source commit is 718fc6cd4d.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/*
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* arch/arm/plat-omap/include/mach/clockdomain.h
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*
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* OMAP2/3 clockdomain framework functions
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*
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* Copyright (C) 2008 Texas Instruments, Inc.
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* Copyright (C) 2008 Nokia Corporation
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*
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* Written by 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 __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H
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#define __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H
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#include <mach/powerdomain.h>
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#include <mach/clock.h>
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#include <mach/cpu.h>
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/* Clockdomain capability flags */
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#define CLKDM_CAN_FORCE_SLEEP (1 << 0)
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#define CLKDM_CAN_FORCE_WAKEUP (1 << 1)
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#define CLKDM_CAN_ENABLE_AUTO (1 << 2)
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#define CLKDM_CAN_DISABLE_AUTO (1 << 3)
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#define CLKDM_CAN_HWSUP (CLKDM_CAN_ENABLE_AUTO | CLKDM_CAN_DISABLE_AUTO)
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#define CLKDM_CAN_SWSUP (CLKDM_CAN_FORCE_SLEEP | CLKDM_CAN_FORCE_WAKEUP)
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#define CLKDM_CAN_HWSUP_SWSUP (CLKDM_CAN_SWSUP | CLKDM_CAN_HWSUP)
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/* OMAP24XX CM_CLKSTCTRL_*.AUTOSTATE_* register bit values */
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#define OMAP24XX_CLKSTCTRL_DISABLE_AUTO 0x0
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#define OMAP24XX_CLKSTCTRL_ENABLE_AUTO 0x1
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/* OMAP3XXX CM_CLKSTCTRL_*.CLKTRCTRL_* register bit values */
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#define OMAP34XX_CLKSTCTRL_DISABLE_AUTO 0x0
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#define OMAP34XX_CLKSTCTRL_FORCE_SLEEP 0x1
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#define OMAP34XX_CLKSTCTRL_FORCE_WAKEUP 0x2
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#define OMAP34XX_CLKSTCTRL_ENABLE_AUTO 0x3
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/*
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* struct clkdm_pwrdm_autodep - a powerdomain that should have wkdeps
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* and sleepdeps added when a powerdomain should stay active in hwsup mode;
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* and conversely, removed when the powerdomain should be allowed to go
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* inactive in hwsup mode.
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*/
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struct clkdm_pwrdm_autodep {
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union {
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/* Name of the powerdomain to add a wkdep/sleepdep on */
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const char *name;
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/* Powerdomain pointer (looked up at clkdm_init() time) */
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struct powerdomain *ptr;
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} pwrdm;
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/* OMAP chip types that this clockdomain dep is valid on */
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const struct omap_chip_id omap_chip;
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};
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struct clockdomain {
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/* Clockdomain name */
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const char *name;
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union {
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/* Powerdomain enclosing this clockdomain */
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const char *name;
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/* Powerdomain pointer assigned at clkdm_register() */
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struct powerdomain *ptr;
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} pwrdm;
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/* CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg */
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const u16 clktrctrl_mask;
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/* Clockdomain capability flags */
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const u8 flags;
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/* OMAP chip types that this clockdomain is valid on */
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const struct omap_chip_id omap_chip;
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/* Usecount tracking */
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atomic_t usecount;
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struct list_head node;
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};
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void clkdm_init(struct clockdomain **clkdms, struct clkdm_pwrdm_autodep *autodeps);
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int clkdm_register(struct clockdomain *clkdm);
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int clkdm_unregister(struct clockdomain *clkdm);
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struct clockdomain *clkdm_lookup(const char *name);
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int clkdm_for_each(int (*fn)(struct clockdomain *clkdm));
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struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm);
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void omap2_clkdm_allow_idle(struct clockdomain *clkdm);
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void omap2_clkdm_deny_idle(struct clockdomain *clkdm);
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int omap2_clkdm_wakeup(struct clockdomain *clkdm);
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int omap2_clkdm_sleep(struct clockdomain *clkdm);
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int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk);
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int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk);
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#endif
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