diff options
Diffstat (limited to 'arch/arm/mach-omap2/cm3xxx.c')
| -rw-r--r-- | arch/arm/mach-omap2/cm3xxx.c | 174 |
1 files changed, 172 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/cm3xxx.c b/arch/arm/mach-omap2/cm3xxx.c index 8f92c56e2254..8b03ec2f4394 100644 --- a/arch/arm/mach-omap2/cm3xxx.c +++ b/arch/arm/mach-omap2/cm3xxx.c @@ -1,9 +1,10 @@ /* - * OMAP2/3 CM module functions + * OMAP3xxx CM module functions * * Copyright (C) 2009 Nokia Corporation - * Copyright (C) 2012 Texas Instruments, Inc. + * Copyright (C) 2008-2010, 2012 Texas Instruments, Inc. * Paul Walmsley + * Rajendra Nayak <rnayak@ti.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -20,9 +21,11 @@ #include "soc.h" #include "iomap.h" #include "common.h" +#include "prm2xxx_3xxx.h" #include "cm.h" #include "cm3xxx.h" #include "cm-regbits-34xx.h" +#include "clockdomain.h" static const u8 omap3xxx_cm_idlest_offs[] = { CM_IDLEST1, CM_IDLEST2, OMAP2430_CM_IDLEST3 @@ -107,6 +110,173 @@ int omap3xxx_cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift) return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY; } +/* Clockdomain low-level operations */ + +static int omap3xxx_clkdm_add_sleepdep(struct clockdomain *clkdm1, + struct clockdomain *clkdm2) +{ + omap2_cm_set_mod_reg_bits((1 << clkdm2->dep_bit), + clkdm1->pwrdm.ptr->prcm_offs, + OMAP3430_CM_SLEEPDEP); + return 0; +} + +static int omap3xxx_clkdm_del_sleepdep(struct clockdomain *clkdm1, + struct clockdomain *clkdm2) +{ + omap2_cm_clear_mod_reg_bits((1 << clkdm2->dep_bit), + clkdm1->pwrdm.ptr->prcm_offs, + OMAP3430_CM_SLEEPDEP); + return 0; +} + +static int omap3xxx_clkdm_read_sleepdep(struct clockdomain *clkdm1, + struct clockdomain *clkdm2) +{ + return omap2_cm_read_mod_bits_shift(clkdm1->pwrdm.ptr->prcm_offs, + OMAP3430_CM_SLEEPDEP, + (1 << clkdm2->dep_bit)); +} + +static int omap3xxx_clkdm_clear_all_sleepdeps(struct clockdomain *clkdm) +{ + struct clkdm_dep *cd; + u32 mask = 0; + + for (cd = clkdm->sleepdep_srcs; cd && cd->clkdm_name; cd++) { + if (!cd->clkdm) + continue; /* only happens if data is erroneous */ + + mask |= 1 << cd->clkdm->dep_bit; + atomic_set(&cd->sleepdep_usecount, 0); + } + omap2_cm_clear_mod_reg_bits(mask, clkdm->pwrdm.ptr->prcm_offs, + OMAP3430_CM_SLEEPDEP); + return 0; +} + +static int omap3xxx_clkdm_sleep(struct clockdomain *clkdm) +{ + omap3xxx_cm_clkdm_force_sleep(clkdm->pwrdm.ptr->prcm_offs, + clkdm->clktrctrl_mask); + return 0; +} + +static int omap3xxx_clkdm_wakeup(struct clockdomain *clkdm) +{ + omap3xxx_cm_clkdm_force_wakeup(clkdm->pwrdm.ptr->prcm_offs, + clkdm->clktrctrl_mask); + return 0; +} + +static void omap3xxx_clkdm_allow_idle(struct clockdomain *clkdm) +{ + if (atomic_read(&clkdm->usecount) > 0) + _clkdm_add_autodeps(clkdm); + + omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs, + clkdm->clktrctrl_mask); +} + +static void omap3xxx_clkdm_deny_idle(struct clockdomain *clkdm) +{ + omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs, + clkdm->clktrctrl_mask); + + if (atomic_read(&clkdm->usecount) > 0) + _clkdm_del_autodeps(clkdm); +} + +static int omap3xxx_clkdm_clk_enable(struct clockdomain *clkdm) +{ + bool hwsup = false; + + if (!clkdm->clktrctrl_mask) + return 0; + + /* + * The CLKDM_MISSING_IDLE_REPORTING flag documentation has + * more details on the unpleasant problem this is working + * around + */ + if ((clkdm->flags & CLKDM_MISSING_IDLE_REPORTING) && + (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)) { + omap3xxx_clkdm_wakeup(clkdm); + return 0; + } + + hwsup = omap3xxx_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs, + clkdm->clktrctrl_mask); + + if (hwsup) { + /* Disable HW transitions when we are changing deps */ + omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs, + clkdm->clktrctrl_mask); + _clkdm_add_autodeps(clkdm); + omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs, + clkdm->clktrctrl_mask); + } else { + if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP) + omap3xxx_clkdm_wakeup(clkdm); + } + + return 0; +} + +static int omap3xxx_clkdm_clk_disable(struct clockdomain *clkdm) +{ + bool hwsup = false; + + if (!clkdm->clktrctrl_mask) + return 0; + + /* + * The CLKDM_MISSING_IDLE_REPORTING flag documentation has + * more details on the unpleasant problem this is working + * around + */ + if (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING && + !(clkdm->flags & CLKDM_CAN_FORCE_SLEEP)) { + omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs, + clkdm->clktrctrl_mask); + return 0; + } + + hwsup = omap3xxx_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs, + clkdm->clktrctrl_mask); + + if (hwsup) { + /* Disable HW transitions when we are changing deps */ + omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs, + clkdm->clktrctrl_mask); + _clkdm_del_autodeps(clkdm); + omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs, + clkdm->clktrctrl_mask); + } else { + if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP) + omap3xxx_clkdm_sleep(clkdm); + } + + return 0; +} + +struct clkdm_ops omap3_clkdm_operations = { + .clkdm_add_wkdep = omap2_clkdm_add_wkdep, + .clkdm_del_wkdep = omap2_clkdm_del_wkdep, + .clkdm_read_wkdep = omap2_clkdm_read_wkdep, + .clkdm_clear_all_wkdeps = omap2_clkdm_clear_all_wkdeps, + .clkdm_add_sleepdep = omap3xxx_clkdm_add_sleepdep, + .clkdm_del_sleepdep = omap3xxx_clkdm_del_sleepdep, + .clkdm_read_sleepdep = omap3xxx_clkdm_read_sleepdep, + .clkdm_clear_all_sleepdeps = omap3xxx_clkdm_clear_all_sleepdeps, + .clkdm_sleep = omap3xxx_clkdm_sleep, + .clkdm_wakeup = omap3xxx_clkdm_wakeup, + .clkdm_allow_idle = omap3xxx_clkdm_allow_idle, + .clkdm_deny_idle = omap3xxx_clkdm_deny_idle, + .clkdm_clk_enable = omap3xxx_clkdm_clk_enable, + .clkdm_clk_disable = omap3xxx_clkdm_clk_disable, +}; + /* * Context save/restore code - OMAP3 only */ |