From b3bf289c1c4561b4262084b64d1a115e4ba845cf Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Sun, 3 Jul 2016 23:29:45 -0700 Subject: ARM: OMAP2+: Fix build with CONFIG_SMP and CONFIG_PM is not set I found one more make randconfig build error with the recent SMP kexec changes. We need the mpuss now always available early. Fixes: 0573b957fc21 ("ARM: OMAP4+: Prevent CPU1 related hang with kexec") Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/Makefile | 5 ++++- arch/arm/mach-omap2/omap-mpuss-lowpower.c | 2 +- 2 files changed, 5 insertions(+), 2 deletions(-) (limited to 'arch/arm/mach-omap2') diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index cd820f5df028..a7f2d051f524 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -78,13 +78,16 @@ obj-$(CONFIG_ARCH_OMAP4) += opp4xxx_data.o endif # Power Management +omap-4-5-pm-common = omap-mpuss-lowpower.o +obj-$(CONFIG_ARCH_OMAP4) += $(omap-4-5-pm-common) +obj-$(CONFIG_ARCH_OMAP5) += $(omap-4-5-pm-common) obj-$(CONFIG_OMAP_PM_NOOP) += omap-pm-noop.o ifeq ($(CONFIG_PM),y) obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o obj-$(CONFIG_ARCH_OMAP2) += sleep24xx.o obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o -omap-4-5-pm-common = pm44xx.o omap-mpuss-lowpower.o +omap-4-5-pm-common += pm44xx.o obj-$(CONFIG_ARCH_OMAP4) += $(omap-4-5-pm-common) obj-$(CONFIG_SOC_OMAP5) += $(omap-4-5-pm-common) obj-$(CONFIG_SOC_DRA7XX) += $(omap-4-5-pm-common) diff --git a/arch/arm/mach-omap2/omap-mpuss-lowpower.c b/arch/arm/mach-omap2/omap-mpuss-lowpower.c index 17515179e6ae..ad982465efd0 100644 --- a/arch/arm/mach-omap2/omap-mpuss-lowpower.c +++ b/arch/arm/mach-omap2/omap-mpuss-lowpower.c @@ -64,7 +64,7 @@ static void __iomem *sar_base; -#ifdef CONFIG_SMP +#if defined(CONFIG_PM) && defined(CONFIG_SMP) struct omap4_cpu_pm_info { struct powerdomain *pwrdm; -- cgit v1.2.3 From 59dcfc48eb41c9074938fc2a0a07634e60f08e22 Mon Sep 17 00:00:00 2001 From: Tero Kristo Date: Thu, 30 Jun 2016 16:14:59 +0300 Subject: ARM: OMAP2+: omap_device: create clock alias purely from DT data This avoids the need to add most of the clock aliases under drivers/clk/ti/clk-xyz.c files. Signed-off-by: Tero Kristo Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/omap_device.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'arch/arm/mach-omap2') diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c index a7be05d83ec7..c2626f83e0c2 100644 --- a/arch/arm/mach-omap2/omap_device.c +++ b/arch/arm/mach-omap2/omap_device.c @@ -63,7 +63,22 @@ static void _add_clkdev(struct omap_device *od, const char *clk_alias, return; } - rc = clk_add_alias(clk_alias, dev_name(&od->pdev->dev), clk_name, NULL); + r = clk_get_sys(NULL, clk_name); + + if (IS_ERR(r) && of_have_populated_dt()) { + struct of_phandle_args clkspec; + + clkspec.np = of_find_node_by_name(NULL, clk_name); + + r = of_clk_get_from_provider(&clkspec); + + rc = clk_register_clkdev(r, clk_alias, + dev_name(&od->pdev->dev)); + } else { + rc = clk_add_alias(clk_alias, dev_name(&od->pdev->dev), + clk_name, NULL); + } + if (rc) { if (rc == -ENODEV || rc == -ENOMEM) dev_err(&od->pdev->dev, -- cgit v1.2.3 From 9fabc1a26e37f88cb19d5def300970a26604d9a4 Mon Sep 17 00:00:00 2001 From: Tero Kristo Date: Mon, 4 Jul 2016 14:11:48 +0300 Subject: ARM: OMAP2+: hwmod: fetch main_clk based on hwmod name With the transition to hwmod module clocks, all hwmods will have their main clocks named _mod_ck. Use this info to fetch main_clk, and use it if found. Also, if a main_clk is found based on the hwmod name, disable the direct PRCM modulemode access from hwmod. Signed-off-by: Tero Kristo Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/omap_hwmod.c | 55 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 50 insertions(+), 5 deletions(-) (limited to 'arch/arm/mach-omap2') diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 83cb527755a9..201da9158d7b 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -178,6 +178,11 @@ */ #define OMAP4_RST_CTRL_ST_OFFSET 4 +/* + * Maximum length for module clock handle names + */ +#define MOD_CLK_MAX_NAME_LEN 32 + /** * struct omap_hwmod_soc_ops - fn ptrs for some SoC-specific operations * @enable_module: function to enable a module (via MODULEMODE) @@ -200,6 +205,7 @@ struct omap_hwmod_soc_ops { int (*init_clkdm)(struct omap_hwmod *oh); void (*update_context_lost)(struct omap_hwmod *oh); int (*get_context_lost)(struct omap_hwmod *oh); + int (*disable_direct_prcm)(struct omap_hwmod *oh); }; /* soc_ops: adapts the omap_hwmod code to the currently-booted SoC */ @@ -776,17 +782,35 @@ static int _del_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) * @oh: struct omap_hwmod * * * Called from _init_clocks(). Populates the @oh _clk (main - * functional clock pointer) if a main_clk is present. Returns 0 on - * success or -EINVAL on error. + * functional clock pointer) if a clock matching the hwmod name is found, + * or a main_clk is present. Returns 0 on success or -EINVAL on error. */ static int _init_main_clk(struct omap_hwmod *oh) { int ret = 0; + char name[MOD_CLK_MAX_NAME_LEN]; + struct clk *clk; - if (!oh->main_clk) - return 0; + /* +7 magic comes from '_mod_ck' suffix */ + if (strlen(oh->name) + 7 > MOD_CLK_MAX_NAME_LEN) + 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"); + + clk = clk_get(NULL, name); + if (!IS_ERR(clk)) { + oh->_clk = clk; + soc_ops.disable_direct_prcm(oh); + oh->main_clk = kstrdup(name, GFP_KERNEL); + } else { + if (!oh->main_clk) + return 0; + + oh->_clk = clk_get(NULL, oh->main_clk); + } - oh->_clk = clk_get(NULL, oh->main_clk); if (IS_ERR(oh->_clk)) { pr_warn("omap_hwmod: %s: cannot clk_get main_clk %s\n", oh->name, oh->main_clk); @@ -3090,6 +3114,25 @@ static int _omap4_is_hardreset_asserted(struct omap_hwmod *oh, oh->prcm.omap4.rstctrl_offs); } +/** + * _omap4_disable_direct_prcm - disable direct PRCM control for hwmod + * @oh: struct omap_hwmod * to disable control for + * + * Disables direct PRCM clkctrl done by hwmod core. Instead, the hwmod + * will be using its main_clk to enable/disable the module. Returns + * 0 if successful. + */ +static int _omap4_disable_direct_prcm(struct omap_hwmod *oh) +{ + if (!oh) + return -EINVAL; + + oh->prcm.omap4.clkctrl_offs = 0; + oh->prcm.omap4.modulemode = 0; + + return 0; +} + /** * _am33xx_deassert_hardreset - call AM33XX PRM hardreset fn with hwmod args * @oh: struct omap_hwmod * to deassert hardreset @@ -3913,6 +3956,7 @@ void __init omap_hwmod_init(void) soc_ops.init_clkdm = _init_clkdm; soc_ops.update_context_lost = _omap4_update_context_lost; soc_ops.get_context_lost = _omap4_get_context_lost; + soc_ops.disable_direct_prcm = _omap4_disable_direct_prcm; } else if (cpu_is_ti814x() || cpu_is_ti816x() || soc_is_am33xx() || soc_is_am43xx()) { soc_ops.enable_module = _omap4_enable_module; @@ -3922,6 +3966,7 @@ void __init omap_hwmod_init(void) soc_ops.deassert_hardreset = _am33xx_deassert_hardreset; soc_ops.is_hardreset_asserted = _omap4_is_hardreset_asserted; soc_ops.init_clkdm = _init_clkdm; + soc_ops.disable_direct_prcm = _omap4_disable_direct_prcm; } else { WARN(1, "omap_hwmod: unknown SoC type\n"); } -- cgit v1.2.3 From e98580e880fb88810a1cd2a1a2583371fc0aa19e Mon Sep 17 00:00:00 2001 From: Tero Kristo Date: Thu, 30 Jun 2016 16:15:01 +0300 Subject: ARM: OMAP2+: timer: change order of hwmod data handling With the introduction of hwmod module clocks, the name of the hwmod main clk may not be available before hwmod setup, as hwmod setup may lookup the main clock dynamically based on the hwmod name. Thus, change the order of hwmod setup and main clock handling for the timer code, to make sure the main clock is going to be available. Signed-off-by: Tero Kristo Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/timer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/arm/mach-omap2') diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c index 5b385bb8aff9..e7eccf6a4daf 100644 --- a/arch/arm/mach-omap2/timer.c +++ b/arch/arm/mach-omap2/timer.c @@ -289,6 +289,8 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer, if (!timer->io_base) return -ENXIO; + omap_hwmod_setup_one(oh_name); + /* After the dmtimer is using hwmod these clocks won't be needed */ timer->fclk = clk_get(NULL, omap_hwmod_get_main_clk(oh)); if (IS_ERR(timer->fclk)) @@ -303,7 +305,6 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer, clk_put(src); - omap_hwmod_setup_one(oh_name); omap_hwmod_enable(oh); __omap_dm_timer_init_regs(timer); -- cgit v1.2.3 From 1d9a5425654de6bb141c7ca1d5dde120ee8c5430 Mon Sep 17 00:00:00 2001 From: Tero Kristo Date: Thu, 30 Jun 2016 16:15:02 +0300 Subject: ARM: OMAP2+: clockdomain: add usecounting support to autoidle APIs The previous implementation was racy in many locations, where the current status of the clockdomain was read out, some operations were executed, and the previous status info was used afterwards to decide next state for the clockdomain. Instead, fix the implementation of the allow_idle / deny_idle APIs to properly have usecounting support. This allows clean handling internally within the clockdomain core, and simplifies the usage also within hwmod. Signed-off-by: Tero Kristo Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/clockdomain.c | 36 ++++++++++++++++++++++++------------ arch/arm/mach-omap2/clockdomain.h | 2 ++ arch/arm/mach-omap2/cpuidle44xx.c | 2 +- arch/arm/mach-omap2/omap-smp.c | 2 +- arch/arm/mach-omap2/omap_hwmod.c | 27 ++++++++++++--------------- arch/arm/mach-omap2/pm.c | 8 +------- arch/arm/mach-omap2/powerdomain.c | 20 ++++++-------------- 7 files changed, 47 insertions(+), 50 deletions(-) (limited to 'arch/arm/mach-omap2') diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c index 2da3b5ec010c..b79b1ca9aee9 100644 --- a/arch/arm/mach-omap2/clockdomain.c +++ b/arch/arm/mach-omap2/clockdomain.c @@ -465,10 +465,7 @@ int clkdm_complete_init(void) return -EACCES; list_for_each_entry(clkdm, &clkdm_list, node) { - if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP) - clkdm_wakeup(clkdm); - else if (clkdm->flags & CLKDM_CAN_DISABLE_AUTO) - clkdm_deny_idle(clkdm); + clkdm_deny_idle(clkdm); _resolve_clkdm_deps(clkdm, clkdm->wkdep_srcs); clkdm_clear_all_wkdeps(clkdm); @@ -925,11 +922,20 @@ void clkdm_allow_idle_nolock(struct clockdomain *clkdm) if (!clkdm) return; - if (!(clkdm->flags & CLKDM_CAN_ENABLE_AUTO)) { - pr_debug("clock: %s: automatic idle transitions cannot be enabled\n", - clkdm->name); + if (!WARN_ON(!clkdm->forcewake_count)) + clkdm->forcewake_count--; + + if (clkdm->forcewake_count) + return; + + if (!clkdm->usecount && (clkdm->flags & CLKDM_CAN_FORCE_SLEEP)) + clkdm_sleep_nolock(clkdm); + + if (!(clkdm->flags & CLKDM_CAN_ENABLE_AUTO)) + return; + + if (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING) return; - } if (!arch_clkdm || !arch_clkdm->clkdm_allow_idle) return; @@ -974,11 +980,17 @@ void clkdm_deny_idle_nolock(struct clockdomain *clkdm) if (!clkdm) return; - if (!(clkdm->flags & CLKDM_CAN_DISABLE_AUTO)) { - pr_debug("clockdomain: %s: automatic idle transitions cannot be disabled\n", - clkdm->name); + if (clkdm->forcewake_count++) + return; + + if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP) + clkdm_wakeup_nolock(clkdm); + + if (!(clkdm->flags & CLKDM_CAN_DISABLE_AUTO)) + return; + + if (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING) return; - } if (!arch_clkdm || !arch_clkdm->clkdm_deny_idle) return; diff --git a/arch/arm/mach-omap2/clockdomain.h b/arch/arm/mach-omap2/clockdomain.h index 2c398ce1a0f2..24667a5a9dc0 100644 --- a/arch/arm/mach-omap2/clockdomain.h +++ b/arch/arm/mach-omap2/clockdomain.h @@ -114,6 +114,7 @@ struct omap_hwmod; * @wkdep_srcs: Clockdomains that can be told to wake this powerdomain up * @sleepdep_srcs: Clockdomains that can be told to keep this clkdm from inact * @usecount: Usecount tracking + * @forcewake_count: Usecount for forcing the domain active * @node: list_head to link all clockdomains together * * @prcm_partition should be a macro from mach-omap2/prcm44xx.h (OMAP4 only) @@ -138,6 +139,7 @@ struct clockdomain { struct clkdm_dep *wkdep_srcs; struct clkdm_dep *sleepdep_srcs; int usecount; + int forcewake_count; struct list_head node; }; diff --git a/arch/arm/mach-omap2/cpuidle44xx.c b/arch/arm/mach-omap2/cpuidle44xx.c index 4b8e9f4d59ea..fa138d4032b6 100644 --- a/arch/arm/mach-omap2/cpuidle44xx.c +++ b/arch/arm/mach-omap2/cpuidle44xx.c @@ -140,7 +140,7 @@ static int omap_enter_idle_coupled(struct cpuidle_device *dev, mpuss_can_lose_context) gic_dist_disable(); - clkdm_wakeup(cpu_clkdm[1]); + clkdm_deny_idle(cpu_clkdm[1]); omap_set_pwrdm_state(cpu_pd[1], PWRDM_POWER_ON); clkdm_allow_idle(cpu_clkdm[1]); diff --git a/arch/arm/mach-omap2/omap-smp.c b/arch/arm/mach-omap2/omap-smp.c index d53a0def2d6c..b4de3da6dffa 100644 --- a/arch/arm/mach-omap2/omap-smp.c +++ b/arch/arm/mach-omap2/omap-smp.c @@ -200,7 +200,7 @@ static int omap4_boot_secondary(unsigned int cpu, struct task_struct *idle) * Ensure that CPU power state is set to ON to avoid CPU * powerdomain transition on wfi */ - clkdm_wakeup_nolock(cpu1_clkdm); + clkdm_deny_idle_nolock(cpu1_clkdm); pwrdm_set_next_pwrst(cpu1_pwrdm, PWRDM_POWER_ON); clkdm_allow_idle_nolock(cpu1_clkdm); diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 201da9158d7b..5b709383381c 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -1702,7 +1702,6 @@ static int _deassert_hardreset(struct omap_hwmod *oh, const char *name) { struct omap_hwmod_rst_info ohri; int ret = -EINVAL; - int hwsup = 0; if (!oh) return -EINVAL; @@ -1720,7 +1719,7 @@ static int _deassert_hardreset(struct omap_hwmod *oh, const char *name) * might not be completed. The clockdomain can be set * in HW_AUTO only when the module become ready. */ - hwsup = clkdm_in_hwsup(oh->clkdm); + clkdm_deny_idle(oh->clkdm); ret = clkdm_hwmod_enable(oh->clkdm, oh); if (ret) { WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n", @@ -1747,8 +1746,7 @@ static int _deassert_hardreset(struct omap_hwmod *oh, const char *name) * Set the clockdomain to HW_AUTO, assuming that the * previous state was HW_AUTO. */ - if (hwsup) - clkdm_allow_idle(oh->clkdm); + clkdm_allow_idle(oh->clkdm); clkdm_hwmod_disable(oh->clkdm, oh); } @@ -2102,7 +2100,6 @@ static int _enable_preprogram(struct omap_hwmod *oh) static int _enable(struct omap_hwmod *oh) { int r; - int hwsup = 0; pr_debug("omap_hwmod: %s: enabling\n", oh->name); @@ -2162,8 +2159,7 @@ static int _enable(struct omap_hwmod *oh) * completely the module. The clockdomain can be set * in HW_AUTO only when the module become ready. */ - hwsup = clkdm_in_hwsup(oh->clkdm) && - !clkdm_missing_idle_reporting(oh->clkdm); + clkdm_deny_idle(oh->clkdm); r = clkdm_hwmod_enable(oh->clkdm, oh); if (r) { WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n", @@ -2183,14 +2179,10 @@ static int _enable(struct omap_hwmod *oh) r = (soc_ops.wait_target_ready) ? soc_ops.wait_target_ready(oh) : -EINVAL; - if (!r) { - /* - * Set the clockdomain to HW_AUTO only if the target is ready, - * assuming that the previous state was HW_AUTO - */ - if (oh->clkdm && hwsup) - clkdm_allow_idle(oh->clkdm); + if (oh->clkdm) + clkdm_allow_idle(oh->clkdm); + if (!r) { oh->_state = _HWMOD_STATE_ENABLED; /* Access the sysconfig only if the target is ready */ @@ -2244,6 +2236,9 @@ static int _idle(struct omap_hwmod *oh) _idle_sysc(oh); _del_initiator_dep(oh, mpu_oh); + if (oh->clkdm) + clkdm_deny_idle(oh->clkdm); + if (oh->flags & HWMOD_BLOCK_WFI) cpu_idle_poll_ctrl(false); if (soc_ops.disable_module) @@ -2256,8 +2251,10 @@ static int _idle(struct omap_hwmod *oh) * transition to complete properly. */ _disable_clocks(oh); - if (oh->clkdm) + if (oh->clkdm) { + clkdm_allow_idle(oh->clkdm); clkdm_hwmod_disable(oh->clkdm, oh); + } /* Mux pins for device idle if populated */ if (oh->mux && oh->mux->pads_dynamic) { diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c index 2f7b11da7d5d..678d2a31dcb8 100644 --- a/arch/arm/mach-omap2/pm.c +++ b/arch/arm/mach-omap2/pm.c @@ -110,13 +110,7 @@ static void __init omap2_init_processor_devices(void) int __init omap_pm_clkdms_setup(struct clockdomain *clkdm, void *unused) { - /* XXX The usecount test is racy */ - if ((clkdm->flags & CLKDM_CAN_ENABLE_AUTO) && - !(clkdm->flags & CLKDM_MISSING_IDLE_REPORTING)) - clkdm_allow_idle(clkdm); - else if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP && - clkdm->usecount == 0) - clkdm_sleep(clkdm); + clkdm_allow_idle(clkdm); return 0; } diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index 78af6d8cf2e2..be7a9761ab3f 100644 --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -222,7 +222,6 @@ static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused) * @pwrdm: struct powerdomain * to operate on * @curr_pwrst: current power state of @pwrdm * @pwrst: power state to switch to - * @hwsup: ptr to a bool to return whether the clkdm is hardware-supervised * * Determine whether the powerdomain needs to be turned on before * attempting to switch power states. Called by @@ -233,8 +232,7 @@ static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused) * "Types of sleep_switch" comment above). */ static u8 _pwrdm_save_clkdm_state_and_activate(struct powerdomain *pwrdm, - u8 curr_pwrst, u8 pwrst, - bool *hwsup) + u8 curr_pwrst, u8 pwrst) { u8 sleep_switch; @@ -244,8 +242,7 @@ static u8 _pwrdm_save_clkdm_state_and_activate(struct powerdomain *pwrdm, arch_pwrdm->pwrdm_set_lowpwrstchange) { sleep_switch = LOWPOWERSTATE_SWITCH; } else { - *hwsup = clkdm_in_hwsup(pwrdm->pwrdm_clkdms[0]); - clkdm_wakeup_nolock(pwrdm->pwrdm_clkdms[0]); + clkdm_deny_idle_nolock(pwrdm->pwrdm_clkdms[0]); sleep_switch = FORCEWAKEUP_SWITCH; } } else { @@ -259,7 +256,6 @@ static u8 _pwrdm_save_clkdm_state_and_activate(struct powerdomain *pwrdm, * _pwrdm_restore_clkdm_state - restore the clkdm hwsup state after pwrst change * @pwrdm: struct powerdomain * to operate on * @sleep_switch: return value from _pwrdm_save_clkdm_state_and_activate() - * @hwsup: should @pwrdm's first clockdomain be set to hardware-supervised mode? * * Restore the clockdomain state perturbed by * _pwrdm_save_clkdm_state_and_activate(), and call the power state @@ -270,14 +266,11 @@ static u8 _pwrdm_save_clkdm_state_and_activate(struct powerdomain *pwrdm, * software-supervised sleep. No return value. */ static void _pwrdm_restore_clkdm_state(struct powerdomain *pwrdm, - u8 sleep_switch, bool hwsup) + u8 sleep_switch) { switch (sleep_switch) { case FORCEWAKEUP_SWITCH: - if (hwsup) - clkdm_allow_idle_nolock(pwrdm->pwrdm_clkdms[0]); - else - clkdm_sleep_nolock(pwrdm->pwrdm_clkdms[0]); + clkdm_allow_idle_nolock(pwrdm->pwrdm_clkdms[0]); break; case LOWPOWERSTATE_SWITCH: if (pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE && @@ -1092,7 +1085,6 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 pwrst) u8 next_pwrst, sleep_switch; int curr_pwrst; int ret = 0; - bool hwsup = false; if (!pwrdm || IS_ERR(pwrdm)) return -EINVAL; @@ -1116,14 +1108,14 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 pwrst) goto osps_out; sleep_switch = _pwrdm_save_clkdm_state_and_activate(pwrdm, curr_pwrst, - pwrst, &hwsup); + pwrst); ret = pwrdm_set_next_pwrst(pwrdm, pwrst); if (ret) pr_err("%s: unable to set power state of powerdomain: %s\n", __func__, pwrdm->name); - _pwrdm_restore_clkdm_state(pwrdm, sleep_switch, hwsup); + _pwrdm_restore_clkdm_state(pwrdm, sleep_switch); osps_out: pwrdm_unlock(pwrdm); -- cgit v1.2.3 From 183e2077d007aa4b697efba095ecfea7244a6107 Mon Sep 17 00:00:00 2001 From: Tero Kristo Date: Thu, 30 Jun 2016 16:15:03 +0300 Subject: ARM: AM33xx: fix module_wait_ready without clkctrl register If the module has no clkctrl register defined, module_wait_ready should not try to access this. This can potentially cause an illegal register access, and result in bad idle reporting also. Signed-off-by: Tero Kristo Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/cm33xx.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/arm/mach-omap2') diff --git a/arch/arm/mach-omap2/cm33xx.c b/arch/arm/mach-omap2/cm33xx.c index 7b181f929525..c073fb57dd13 100644 --- a/arch/arm/mach-omap2/cm33xx.c +++ b/arch/arm/mach-omap2/cm33xx.c @@ -220,6 +220,9 @@ static int am33xx_cm_wait_module_ready(u8 part, s16 inst, u16 clkctrl_offs, { int i = 0; + if (!clkctrl_offs) + return 0; + omap_test_timeout(_is_module_ready(inst, clkctrl_offs), MAX_MODULE_READY_TIME, i); -- cgit v1.2.3