diff options
| -rw-r--r-- | arch/arm/mach-omap2/cm.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cm4xxx.c | 36 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 33 |
3 files changed, 50 insertions, 21 deletions
diff --git a/arch/arm/mach-omap2/cm.h b/arch/arm/mach-omap2/cm.h index bbc69df3bf3d..a02ca30423dc 100644 --- a/arch/arm/mach-omap2/cm.h +++ b/arch/arm/mach-omap2/cm.h @@ -112,7 +112,7 @@ extern u32 cm_rmw_mod_reg_bits(u32 mask, u32 bits, s16 module, s16 idx); extern int omap2_cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift); -extern int omap4_cm_wait_module_ready(u32 prcm_mod, u8 prcm_dev_offs); +extern int omap4_cm_wait_module_ready(void __iomem *clkctrl_reg); static inline u32 cm_set_mod_reg_bits(u32 bits, s16 module, s16 idx) { diff --git a/arch/arm/mach-omap2/cm4xxx.c b/arch/arm/mach-omap2/cm4xxx.c index af32a457a46b..b101091e95d6 100644 --- a/arch/arm/mach-omap2/cm4xxx.c +++ b/arch/arm/mach-omap2/cm4xxx.c @@ -21,19 +21,41 @@ #include <asm/atomic.h> +#include <plat/common.h> + #include "cm.h" #include "cm-regbits-44xx.h" /** - * omap4_cm_wait_idlest_ready - wait for a module to leave idle or standby - * @prcm_mod: PRCM module offset (XXX example) - * @prcm_dev_offs: PRCM device offset (e.g. MCASP XXX example) + * omap4_cm_wait_module_ready - wait for a module to be in 'func' state + * @clkctrl_reg: CLKCTRL module address + * + * Wait for the module IDLEST to be functional. If the idle state is in any + * the non functional state (trans, idle or disabled), module and thus the + * sysconfig cannot be accessed and will probably lead to an "imprecise + * external abort" + * + * Module idle state: + * 0x0 func: Module is fully functional, including OCP + * 0x1 trans: Module is performing transition: wakeup, or sleep, or sleep + * abortion + * 0x2 idle: Module is in Idle mode (only OCP part). It is functional if + * using separate functional clock + * 0x3 disabled: Module is disabled and cannot be accessed * - * XXX document + * TODO: Need to handle module accessible in idle state */ -int omap4_cm_wait_idlest_ready(u32 prcm_mod, u8 prcm_dev_offs) +int omap4_cm_wait_module_ready(void __iomem *clkctrl_reg) { - /* FIXME: Add clock manager related code */ - return 0; + int i = 0; + + if (!clkctrl_reg) + return 0; + + omap_test_timeout(((__raw_readl(clkctrl_reg) & + OMAP4430_IDLEST_MASK) == 0), + MAX_MODULE_READY_TIME, i); + + return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY; } diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index e436dcb19795..4a134c4d2271 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -819,11 +819,8 @@ static int _wait_target_ready(struct omap_hwmod *oh) ret = omap2_cm_wait_module_ready(oh->prcm.omap2.module_offs, oh->prcm.omap2.idlest_reg_id, oh->prcm.omap2.idlest_idle_bit); -#if 0 } else if (cpu_is_omap44xx()) { - ret = omap4_cm_wait_module_ready(oh->prcm.omap4.module_offs, - oh->prcm.omap4.device_offs); -#endif + ret = omap4_cm_wait_module_ready(oh->prcm.omap4.clkctrl_reg); } else { BUG(); }; @@ -912,16 +909,21 @@ static int _enable(struct omap_hwmod *oh) _add_initiator_dep(oh, mpu_oh); _enable_clocks(oh); - if (oh->class->sysc) { - if (!(oh->_int_flags & _HWMOD_SYSCONFIG_LOADED)) - _update_sysc_cache(oh); - _sysc_enable(oh); - } - r = _wait_target_ready(oh); - if (!r) + if (!r) { oh->_state = _HWMOD_STATE_ENABLED; + /* Access the sysconfig only if the target is ready */ + if (oh->class->sysc) { + if (!(oh->_int_flags & _HWMOD_SYSCONFIG_LOADED)) + _update_sysc_cache(oh); + _sysc_enable(oh); + } + } else { + pr_debug("omap_hwmod: %s: _wait_target_ready: %d\n", + oh->name, r); + } + return r; } @@ -999,7 +1001,7 @@ static int _shutdown(struct omap_hwmod *oh) static int _setup(struct omap_hwmod *oh) { struct omap_hwmod_ocp_if *os; - int i; + int i, r; if (!oh) return -EINVAL; @@ -1023,7 +1025,12 @@ static int _setup(struct omap_hwmod *oh) oh->_state = _HWMOD_STATE_INITIALIZED; - _enable(oh); + r = _enable(oh); + if (r) { + pr_warning("omap_hwmod: %s: cannot be enabled (%d)\n", + oh->name, oh->_state); + return 0; + } if (!(oh->flags & HWMOD_INIT_NO_RESET)) { /* |