diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 148 |
1 files changed, 38 insertions, 110 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 1052b29697b8..0da4f2ea76c4 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -160,7 +160,6 @@ #include "prm44xx.h" #include "prm33xx.h" #include "prminst44xx.h" -#include "mux.h" #include "pm.h" /* Name of the OMAP hwmod for the MPU */ @@ -217,9 +216,6 @@ static LIST_HEAD(omap_hwmod_list); /* mpu_oh: used to add/remove MPU initiator from sleepdep list */ static struct omap_hwmod *mpu_oh; -/* io_chain_lock: used to serialize reconfigurations of the I/O chain */ -static DEFINE_SPINLOCK(io_chain_lock); - /* * linkspace: ptr to a buffer that struct omap_hwmod_link records are * allocated from - used to reduce the number of small memory @@ -594,51 +590,6 @@ static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle, } /** - * _set_idle_ioring_wakeup - enable/disable IO pad wakeup on hwmod idle for mux - * @oh: struct omap_hwmod * - * @set_wake: bool value indicating to set (true) or clear (false) wakeup enable - * - * Set or clear the I/O pad wakeup flag in the mux entries for the - * hwmod @oh. This function changes the @oh->mux->pads_dynamic array - * in memory. If the hwmod is currently idled, and the new idle - * values don't match the previous ones, this function will also - * update the SCM PADCTRL registers. Otherwise, if the hwmod is not - * currently idled, this function won't touch the hardware: the new - * mux settings are written to the SCM PADCTRL registers when the - * hwmod is idled. No return value. - */ -static void _set_idle_ioring_wakeup(struct omap_hwmod *oh, bool set_wake) -{ - struct omap_device_pad *pad; - bool change = false; - u16 prev_idle; - int j; - - if (!oh->mux || !oh->mux->enabled) - return; - - for (j = 0; j < oh->mux->nr_pads_dynamic; j++) { - pad = oh->mux->pads_dynamic[j]; - - if (!(pad->flags & OMAP_DEVICE_PAD_WAKEUP)) - continue; - - prev_idle = pad->idle; - - if (set_wake) - pad->idle |= OMAP_WAKEUP_EN; - else - pad->idle &= ~OMAP_WAKEUP_EN; - - if (prev_idle != pad->idle) - change = true; - } - - if (change && oh->_state == _HWMOD_STATE_IDLE) - omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE); -} - -/** * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware * @oh: struct omap_hwmod * * @@ -790,14 +741,14 @@ static int _init_main_clk(struct omap_hwmod *oh) int ret = 0; char name[MOD_CLK_MAX_NAME_LEN]; struct clk *clk; + static const char modck[] = "_mod_ck"; - /* +7 magic comes from '_mod_ck' suffix */ - if (strlen(oh->name) + 7 > MOD_CLK_MAX_NAME_LEN) + if (strlen(oh->name) >= MOD_CLK_MAX_NAME_LEN - strlen(modck)) pr_warn("%s: warning: cropping name for %s\n", __func__, oh->name); - strncpy(name, oh->name, MOD_CLK_MAX_NAME_LEN - 7); - strcat(name, "_mod_ck"); + strlcpy(name, oh->name, MOD_CLK_MAX_NAME_LEN - strlen(modck)); + strlcat(name, modck, MOD_CLK_MAX_NAME_LEN); clk = clk_get(NULL, name); if (!IS_ERR(clk)) { @@ -2018,29 +1969,6 @@ static int _reset(struct omap_hwmod *oh) } /** - * _reconfigure_io_chain - clear any I/O chain wakeups and reconfigure chain - * - * Call the appropriate PRM function to clear any logged I/O chain - * wakeups and to reconfigure the chain. This apparently needs to be - * done upon every mux change. Since hwmods can be concurrently - * enabled and idled, hold a spinlock around the I/O chain - * reconfiguration sequence. No return value. - * - * XXX When the PRM code is moved to drivers, this function can be removed, - * as the PRM infrastructure should abstract this. - */ -static void _reconfigure_io_chain(void) -{ - unsigned long flags; - - spin_lock_irqsave(&io_chain_lock, flags); - - omap_prm_reconfigure_io_chain(); - - spin_unlock_irqrestore(&io_chain_lock, flags); -} - -/** * _omap4_update_context_lost - increment hwmod context loss counter if * hwmod context was lost, and clear hardware context loss reg * @oh: hwmod to check for context loss @@ -2109,18 +2037,9 @@ static int _enable(struct omap_hwmod *oh) /* * hwmods with HWMOD_INIT_NO_IDLE flag set are left in enabled - * state at init. Now that someone is really trying to enable - * them, just ensure that the hwmod mux is set. + * state at init. */ if (oh->_int_flags & _HWMOD_SKIP_ENABLE) { - /* - * If the caller has mux data populated, do the mux'ing - * which wouldn't have been done as part of the _enable() - * done during setup. - */ - if (oh->mux) - omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED); - oh->_int_flags &= ~_HWMOD_SKIP_ENABLE; return 0; } @@ -2145,16 +2064,6 @@ static int _enable(struct omap_hwmod *oh) if (_are_all_hardreset_lines_asserted(oh)) return 0; - /* Mux pins for device runtime if populated */ - if (oh->mux && (!oh->mux->enabled || - ((oh->_state == _HWMOD_STATE_IDLE) && - oh->mux->pads_dynamic))) { - omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED); - _reconfigure_io_chain(); - } else if (oh->flags & HWMOD_RECONFIG_IO_CHAIN) { - _reconfigure_io_chain(); - } - _add_initiator_dep(oh, mpu_oh); if (oh->clkdm) { @@ -2260,14 +2169,6 @@ static int _idle(struct omap_hwmod *oh) clkdm_hwmod_disable(oh->clkdm, oh); } - /* Mux pins for device idle if populated */ - if (oh->mux && oh->mux->pads_dynamic) { - omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE); - _reconfigure_io_chain(); - } else if (oh->flags & HWMOD_RECONFIG_IO_CHAIN) { - _reconfigure_io_chain(); - } - oh->_state = _HWMOD_STATE_IDLE; return 0; @@ -2334,10 +2235,6 @@ static int _shutdown(struct omap_hwmod *oh) for (i = 0; i < oh->rst_lines_cnt; i++) _assert_hardreset(oh, oh->rst_lines[i].name); - /* Mux pins to safe mode or use populated off mode values */ - if (oh->mux) - omap_hwmod_mux(oh->mux, _HWMOD_STATE_DISABLED); - oh->_state = _HWMOD_STATE_DISABLED; return 0; @@ -3352,6 +3249,36 @@ int __init omap_hwmod_setup_one(const char *oh_name) } /** + * omap_hwmod_setup_earlycon_flags - set up flags for early console + * + * Enable DEBUG_OMAPUART_FLAGS for uart hwmod that is being used as + * early concole so that hwmod core doesn't reset and keep it in idle + * that specific uart. + */ +#ifdef CONFIG_SERIAL_EARLYCON +static void __init omap_hwmod_setup_earlycon_flags(void) +{ + struct device_node *np; + struct omap_hwmod *oh; + const char *uart; + + np = of_find_node_by_path("/chosen"); + if (np) { + uart = of_get_property(np, "stdout-path", NULL); + if (uart) { + np = of_find_node_by_path(uart); + if (np) { + uart = of_get_property(np, "ti,hwmods", NULL); + oh = omap_hwmod_lookup(uart); + if (oh) + oh->flags |= DEBUG_OMAPUART_FLAGS; + } + } + } +} +#endif + +/** * omap_hwmod_setup_all - set up all registered IP blocks * * Initialize and set up all IP blocks registered with the hwmod code. @@ -3364,6 +3291,9 @@ static int __init omap_hwmod_setup_all(void) _ensure_mpu_hwmod_is_setup(NULL); omap_hwmod_for_each(_init, NULL); +#ifdef CONFIG_SERIAL_EARLYCON + omap_hwmod_setup_earlycon_flags(); +#endif omap_hwmod_for_each(_setup, NULL); return 0; @@ -3729,7 +3659,6 @@ int omap_hwmod_enable_wakeup(struct omap_hwmod *oh) _write_sysconfig(v, oh); } - _set_idle_ioring_wakeup(oh, true); spin_unlock_irqrestore(&oh->_lock, flags); return 0; @@ -3762,7 +3691,6 @@ int omap_hwmod_disable_wakeup(struct omap_hwmod *oh) _write_sysconfig(v, oh); } - _set_idle_ioring_wakeup(oh, false); spin_unlock_irqrestore(&oh->_lock, flags); return 0; |