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/*
* OMAP2xxx clockdomains
*
* Copyright (C) 2008-2009 Texas Instruments, Inc.
* Copyright (C) 2008-2010 Nokia Corporation
*
* Paul Walmsley, Jouni Högander
*
* This file contains clockdomains and clockdomain wakeup dependencies
* for OMAP2xxx chips. Some notes:
*
* A useful validation rule for struct clockdomain: Any clockdomain
* referenced by a wkdep_srcs must have a dep_bit assigned. So
* wkdep_srcs are really just software-controllable dependencies.
* Non-software-controllable dependencies do exist, but they are not
* encoded below (yet).
*
* 24xx does not support programmable sleep dependencies (SLEEPDEP)
*
* The overly-specific dep_bit names are due to a bit name collision
* with CM_FCLKEN_{DSP,IVA2}. The DSP/IVA2 PM_WKDEP and CM_SLEEPDEP shift
* value are the same for all powerdomains: 2
*
* XXX should dep_bit be a mask, so we can test to see if it is 0 as a
* sanity check?
* XXX encode hardware fixed wakeup dependencies -- esp. for 3430 CORE
*/
/*
* To-Do List
* -> Port the Sleep/Wakeup dependencies for the domains
* from the Power domain framework
*/
#include <linux/kernel.h>
#include <linux/io.h>
#include "clockdomain.h"
#include "prm2xxx_3xxx.h"
#include "cm2xxx_3xxx.h"
#include "cm-regbits-24xx.h"
#include "prm-regbits-24xx.h"
/*
* Clockdomain dependencies for wkdeps
*
* XXX Hardware dependencies (e.g., dependencies that cannot be
* changed in software) are not included here yet, but should be.
*/
/* Wakeup dependency source arrays */
/* 2430-specific possible wakeup dependencies */
/* 2430 PM_WKDEP_CORE: DSP, GFX, MPU, WKUP, MDM */
static struct clkdm_dep core_2430_wkdeps[] = {
{ .clkdm_name = "dsp_clkdm" },
{ .clkdm_name = "gfx_clkdm" },
{ .clkdm_name = "mpu_clkdm" },
{ .clkdm_name = "wkup_clkdm" },
{ .clkdm_name = "mdm_clkdm" },
{ NULL },
};
/* 2430 PM_WKDEP_MPU: CORE, DSP, WKUP, MDM */
static struct clkdm_dep mpu_2430_wkdeps[] = {
{ .clkdm_name = "core_l3_clkdm" },
{ .clkdm_name = "core_l4_clkdm" },
{ .clkdm_name = "dsp_clkdm" },
{ .clkdm_name = "wkup_clkdm" },
{ .clkdm_name = "mdm_clkdm" },
{ NULL },
};
/* 2430 PM_WKDEP_MDM: CORE, MPU, WKUP */
static struct clkdm_dep mdm_2430_wkdeps[] = {
{ .clkdm_name = "core_l3_clkdm" },
{ .clkdm_name = "core_l4_clkdm" },
{ .clkdm_name = "mpu_clkdm" },
{ .clkdm_name = "wkup_clkdm" },
{ NULL },
};
/*
* 2430-only clockdomains
*/
static struct clockdomain mpu_2430_clkdm = {
.name = "mpu_clkdm",
.pwrdm = { .name = "mpu_pwrdm" },
.flags = CLKDM_CAN_HWSUP_SWSUP,
.wkdep_srcs = mpu_2430_wkdeps,
.clktrctrl_mask = OMAP24XX_AUTOSTATE_MPU_MASK,
};
/* Another case of bit name collisions between several registers: EN_MDM */
static struct clockdomain mdm_clkdm = {
.name = "mdm_clkdm",
.pwrdm = { .name = "mdm_pwrdm" },
.flags = CLKDM_CAN_HWSUP_SWSUP,
.dep_bit = OMAP2430_PM_WKDEP_MPU_EN_MDM_SHIFT,
.wkdep_srcs = mdm_2430_wkdeps,
.clktrctrl_mask = OMAP2430_AUTOSTATE_MDM_MASK,
};
static struct clockdomain dsp_2430_clkdm = {
.name = "dsp_clkdm",
.pwrdm = { .name = "dsp_pwrdm" },
.flags = CLKDM_CAN_HWSUP_SWSUP,
.dep_bit = OMAP24XX_PM_WKDEP_MPU_EN_DSP_SHIFT,
.wkdep_srcs = dsp_24xx_wkdeps,
.clktrctrl_mask = OMAP24XX_AUTOSTATE_DSP_MASK,
};
static struct clockdomain gfx_2430_clkdm = {
.name = "gfx_clkdm",
.pwrdm = { .name = "gfx_pwrdm" },
.flags = CLKDM_CAN_HWSUP_SWSUP,
.wkdep_srcs = gfx_24xx_wkdeps,
.clktrctrl_mask = OMAP24XX_AUTOSTATE_GFX_MASK,
};
/*
* XXX add usecounting for clkdm dependencies, otherwise the presence
* of a single dep bit for core_l3_24xx_clkdm and core_l4_24xx_clkdm
* could cause trouble
*/
static struct clockdomain core_l3_2430_clkdm = {
.name = "core_l3_clkdm",
.pwrdm = { .name = "core_pwrdm" },
.flags = CLKDM_CAN_HWSUP,
.dep_bit = OMAP24XX_EN_CORE_SHIFT,
.wkdep_srcs = core_2430_wkdeps,
.clktrctrl_mask = OMAP24XX_AUTOSTATE_L3_MASK,
};
/*
* XXX add usecounting for clkdm dependencies, otherwise the presence
* of a single dep bit for core_l3_24xx_clkdm and core_l4_24xx_clkdm
* could cause trouble
*/
static struct clockdomain core_l4_2430_clkdm = {
.name = "core_l4_clkdm",
.pwrdm = { .name = "core_pwrdm" },
.flags = CLKDM_CAN_HWSUP,
.dep_bit = OMAP24XX_EN_CORE_SHIFT,
.wkdep_srcs = core_2430_wkdeps,
.clktrctrl_mask = OMAP24XX_AUTOSTATE_L4_MASK,
};
static struct clockdomain dss_2430_clkdm = {
.name = "dss_clkdm",
.pwrdm = { .name = "core_pwrdm" },
.flags = CLKDM_CAN_HWSUP,
.clktrctrl_mask = OMAP24XX_AUTOSTATE_DSS_MASK,
};
static struct clockdomain *clockdomains_omap243x[] __initdata = {
&wkup_common_clkdm,
&mpu_2430_clkdm,
&mdm_clkdm,
&dsp_2430_clkdm,
&gfx_2430_clkdm,
&core_l3_2430_clkdm,
&core_l4_2430_clkdm,
&dss_2430_clkdm,
NULL,
};
void __init omap243x_clockdomains_init(void)
{
if (!cpu_is_omap243x())
return;
clkdm_register_platform_funcs(&omap2_clkdm_operations);
clkdm_register_clkdms(clockdomains_omap243x);
clkdm_complete_init();
}
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