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ARM: 8822/1: smp_twd: Remove legacy TWD registration

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As of commit 7484c727b6 ("ARM: realview: delete the RealView board
files"), the ARM Timer and Watchdog Unit is instantiated from DT only.
Moreover, the driver is selected from ARCH_MULTIPLATFORM platforms only,
which implies OF, TIMER_OF, and COMMON_CLK.

Hence remove all unused legacy infrastructure from the driver.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Geert Uytterhoeven 2019-01-08 14:29:23 +01:00 committed by Russell King
parent 8f433ec4d0
commit fec9eac659
3 changed files with 0 additions and 83 deletions
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1
arch/arm/Kconfig
View File

@ -1316,7 +1316,6 @@ config HAVE_ARM_ARCH_TIMER
config HAVE_ARM_TWD
bool
select TIMER_OF if OF
help
This options enables support for the ARM timer and watchdog unit

16
arch/arm/include/asm/smp_twd.h
View File

@ -19,20 +19,4 @@
#define TWD_TIMER_CONTROL_PERIODIC (1 << 1)
#define TWD_TIMER_CONTROL_IT_ENABLE (1 << 2)
#include <linux/ioport.h>
struct twd_local_timer {
struct resource res[2];
};
#define DEFINE_TWD_LOCAL_TIMER(name,base,irq) \
struct twd_local_timer name __initdata = { \
.res = { \
DEFINE_RES_MEM(base, 0x10), \
DEFINE_RES_IRQ(irq), \
}, \
};
int twd_local_timer_register(struct twd_local_timer *);
#endif

66
arch/arm/kernel/smp_twd.c
View File

@ -100,8 +100,6 @@ static void twd_timer_stop(void)
disable_percpu_irq(clk->irq);
}
#ifdef CONFIG_COMMON_CLK
/*
* Updates clockevent frequency when the cpu frequency changes.
* Called on the cpu that is changing frequency with interrupts disabled.
@ -143,54 +141,6 @@ static int twd_clk_init(void)
}
core_initcall(twd_clk_init);
#elif defined (CONFIG_CPU_FREQ)
#include <linux/cpufreq.h>
/*
* Updates clockevent frequency when the cpu frequency changes.
* Called on the cpu that is changing frequency with interrupts disabled.
*/
static void twd_update_frequency(void *data)
{
twd_timer_rate = clk_get_rate(twd_clk);
clockevents_update_freq(raw_cpu_ptr(twd_evt), twd_timer_rate);
}
static int twd_cpufreq_transition(struct notifier_block *nb,
unsigned long state, void *data)
{
struct cpufreq_freqs *freqs = data;
/*
* The twd clock events must be reprogrammed to account for the new
* frequency. The timer is local to a cpu, so cross-call to the
* changing cpu.
*/
if (state == CPUFREQ_POSTCHANGE)
smp_call_function_single(freqs->cpu, twd_update_frequency,
NULL, 1);
return NOTIFY_OK;
}
static struct notifier_block twd_cpufreq_nb = {
.notifier_call = twd_cpufreq_transition,
};
static int twd_cpufreq_init(void)
{
if (twd_evt && raw_cpu_ptr(twd_evt) && !IS_ERR(twd_clk))
return cpufreq_register_notifier(&twd_cpufreq_nb,
CPUFREQ_TRANSITION_NOTIFIER);
return 0;
}
core_initcall(twd_cpufreq_init);
#endif
static void twd_calibrate_rate(void)
{
unsigned long count;
@ -366,21 +316,6 @@ static int __init twd_local_timer_common_register(struct device_node *np)
return err;
}
int __init twd_local_timer_register(struct twd_local_timer *tlt)
{
if (twd_base || twd_evt)
return -EBUSY;
twd_ppi = tlt->res[1].start;
twd_base = ioremap(tlt->res[0].start, resource_size(&tlt->res[0]));
if (!twd_base)
return -ENOMEM;
return twd_local_timer_common_register(NULL);
}
#ifdef CONFIG_OF
static int __init twd_local_timer_of_register(struct device_node *np)
{
int err;
@ -406,4 +341,3 @@ static int __init twd_local_timer_of_register(struct device_node *np)
TIMER_OF_DECLARE(arm_twd_a9, "arm,cortex-a9-twd-timer", twd_local_timer_of_register);
TIMER_OF_DECLARE(arm_twd_a5, "arm,cortex-a5-twd-timer", twd_local_timer_of_register);
TIMER_OF_DECLARE(arm_twd_11mp, "arm,arm11mp-twd-timer", twd_local_timer_of_register);
#endif