diff options
Diffstat (limited to 'arch/avr32')
| -rw-r--r-- | arch/avr32/include/asm/Kbuild | 1 | ||||
| -rw-r--r-- | arch/avr32/include/asm/mm-arch-hooks.h | 15 | ||||
| -rw-r--r-- | arch/avr32/kernel/time.c | 65 | ||||
| -rw-r--r-- | arch/avr32/mach-at32ap/clock.c | 20 |
4 files changed, 53 insertions, 48 deletions
diff --git a/arch/avr32/include/asm/Kbuild b/arch/avr32/include/asm/Kbuild index 1d66afd..f61f2dd 100644 --- a/arch/avr32/include/asm/Kbuild +++ b/arch/avr32/include/asm/Kbuild @@ -12,6 +12,7 @@ generic-y += irq_work.h generic-y += local.h generic-y += local64.h generic-y += mcs_spinlock.h +generic-y += mm-arch-hooks.h generic-y += param.h generic-y += percpu.h generic-y += preempt.h diff --git a/arch/avr32/include/asm/mm-arch-hooks.h b/arch/avr32/include/asm/mm-arch-hooks.h deleted file mode 100644 index 145452f..0000000 --- a/arch/avr32/include/asm/mm-arch-hooks.h +++ /dev/null @@ -1,15 +0,0 @@ -/* - * Architecture specific mm hooks - * - * Copyright (C) 2015, IBM Corporation - * Author: Laurent Dufour <ldufour@linux.vnet.ibm.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 - * published by the Free Software Foundation. - */ - -#ifndef _ASM_AVR32_MM_ARCH_HOOKS_H -#define _ASM_AVR32_MM_ARCH_HOOKS_H - -#endif /* _ASM_AVR32_MM_ARCH_HOOKS_H */ diff --git a/arch/avr32/kernel/time.c b/arch/avr32/kernel/time.c index d0f771b..a124c55 100644 --- a/arch/avr32/kernel/time.c +++ b/arch/avr32/kernel/time.c @@ -18,6 +18,7 @@ #include <mach/pm.h> +static bool disable_cpu_idle_poll; static cycle_t read_cycle_count(struct clocksource *cs) { @@ -80,45 +81,45 @@ static int comparator_next_event(unsigned long delta, return 0; } -static void comparator_mode(enum clock_event_mode mode, - struct clock_event_device *evdev) +static int comparator_shutdown(struct clock_event_device *evdev) { - switch (mode) { - case CLOCK_EVT_MODE_ONESHOT: - pr_debug("%s: start\n", evdev->name); - /* FALLTHROUGH */ - case CLOCK_EVT_MODE_RESUME: + pr_debug("%s: %s\n", __func__, evdev->name); + sysreg_write(COMPARE, 0); + + if (disable_cpu_idle_poll) { + disable_cpu_idle_poll = false; /* - * If we're using the COUNT and COMPARE registers we - * need to force idle poll. + * Only disable idle poll if we have forced that + * in a previous call. */ - cpu_idle_poll_ctrl(true); - break; - case CLOCK_EVT_MODE_UNUSED: - case CLOCK_EVT_MODE_SHUTDOWN: - sysreg_write(COMPARE, 0); - pr_debug("%s: stop\n", evdev->name); - if (evdev->mode == CLOCK_EVT_MODE_ONESHOT || - evdev->mode == CLOCK_EVT_MODE_RESUME) { - /* - * Only disable idle poll if we have forced that - * in a previous call. - */ - cpu_idle_poll_ctrl(false); - } - break; - default: - BUG(); + cpu_idle_poll_ctrl(false); } + return 0; +} + +static int comparator_set_oneshot(struct clock_event_device *evdev) +{ + pr_debug("%s: %s\n", __func__, evdev->name); + + disable_cpu_idle_poll = true; + /* + * If we're using the COUNT and COMPARE registers we + * need to force idle poll. + */ + cpu_idle_poll_ctrl(true); + + return 0; } static struct clock_event_device comparator = { - .name = "avr32_comparator", - .features = CLOCK_EVT_FEAT_ONESHOT, - .shift = 16, - .rating = 50, - .set_next_event = comparator_next_event, - .set_mode = comparator_mode, + .name = "avr32_comparator", + .features = CLOCK_EVT_FEAT_ONESHOT, + .shift = 16, + .rating = 50, + .set_next_event = comparator_next_event, + .set_state_shutdown = comparator_shutdown, + .set_state_oneshot = comparator_set_oneshot, + .tick_resume = comparator_set_oneshot, }; void read_persistent_clock(struct timespec *ts) diff --git a/arch/avr32/mach-at32ap/clock.c b/arch/avr32/mach-at32ap/clock.c index 23b1a97..52c179b 100644 --- a/arch/avr32/mach-at32ap/clock.c +++ b/arch/avr32/mach-at32ap/clock.c @@ -80,6 +80,9 @@ int clk_enable(struct clk *clk) { unsigned long flags; + if (!clk) + return 0; + spin_lock_irqsave(&clk_lock, flags); __clk_enable(clk); spin_unlock_irqrestore(&clk_lock, flags); @@ -106,6 +109,9 @@ void clk_disable(struct clk *clk) { unsigned long flags; + if (IS_ERR_OR_NULL(clk)) + return; + spin_lock_irqsave(&clk_lock, flags); __clk_disable(clk); spin_unlock_irqrestore(&clk_lock, flags); @@ -117,6 +123,9 @@ unsigned long clk_get_rate(struct clk *clk) unsigned long flags; unsigned long rate; + if (!clk) + return 0; + spin_lock_irqsave(&clk_lock, flags); rate = clk->get_rate(clk); spin_unlock_irqrestore(&clk_lock, flags); @@ -129,6 +138,9 @@ long clk_round_rate(struct clk *clk, unsigned long rate) { unsigned long flags, actual_rate; + if (!clk) + return 0; + if (!clk->set_rate) return -ENOSYS; @@ -145,6 +157,9 @@ int clk_set_rate(struct clk *clk, unsigned long rate) unsigned long flags; long ret; + if (!clk) + return 0; + if (!clk->set_rate) return -ENOSYS; @@ -161,6 +176,9 @@ int clk_set_parent(struct clk *clk, struct clk *parent) unsigned long flags; int ret; + if (!clk) + return 0; + if (!clk->set_parent) return -ENOSYS; @@ -174,7 +192,7 @@ EXPORT_SYMBOL(clk_set_parent); struct clk *clk_get_parent(struct clk *clk) { - return clk->parent; + return !clk ? NULL : clk->parent; } EXPORT_SYMBOL(clk_get_parent); |