提交 618b902d 编写于 作者: Y Yoshinori Sato

h8300: clocksource

h8300_timer8: 8bit clockevent device
h8300_timer16 / h8300_tpu: 16bit clocksource
Signed-off-by: NYoshinori Sato <ysato@users.sourceforge.jp>
上级 7b5bb891
* Renesas H8/300 16bit timer
The 16bit timer is a 16bit timer/counter with configurable clock inputs and
programmable compare match.
Required Properties:
- compatible: must contain "renesas,16bit-timer"
- reg: base address and length of the registers block for the timer module.
- interrupts: interrupt-specifier for the timer, IMIA
- clocks: a list of phandle, one for each entry in clock-names.
- clock-names: must contain "peripheral_clk" for the functional clock.
- renesas,channel: timer channel number.
Example:
timer16: timer@ffff68 {
compatible = "reneas,16bit-timer";
reg = <0xffff68 8>, <0xffff60 8>;
interrupts = <24>;
renesas,channel = <0>;
clocks = <&pclk>;
clock-names = "peripheral_clk";
};
* Renesas H8/300 8bit timer
The 8bit timer is a 8bit timer/counter with configurable clock inputs and
programmable compare match.
This implement only supported cascade mode.
Required Properties:
- compatible: must contain "renesas,8bit-timer"
- reg: base address and length of the registers block for the timer module.
- interrupts: interrupt-specifier for the timer, CMIA and TOVI
- clocks: a list of phandle, one for each entry in clock-names.
- clock-names: must contain "fck" for the functional clock.
Example:
timer8_0: timer@ffff80 {
compatible = "renesas,8bit-timer";
reg = <0xffff80 10>;
interrupts = <36>;
clocks = <&fclk>;
clock-names = "fck";
};
* Renesas H8/300 Timer Pluse Unit
The TPU is a 16bit timer/counter with configurable clock inputs and
programmable compare match.
This implementation support only cascade mode.
Required Properties:
- compatible: must contain "renesas,tpu"
- reg: base address and length of the registers block in 2 channel.
- clocks: a list of phandle, one for each entry in clock-names.
- clock-names: must contain "peripheral_clk" for the functional clock.
Example:
tpu: tpu@ffffe0 {
compatible = "renesas,tpu";
reg = <0xffffe0 16>, <0xfffff0 12>;
clocks = <&pclk>;
clock-names = "peripheral_clk";
};
......@@ -258,4 +258,11 @@ config CLKSRC_PXA
help
This enables OST0 support available on PXA and SA-11x0
platforms.
config H8300_TMR16
bool
config H8300_TPU
bool
endmenu
......@@ -52,3 +52,6 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP) += timer-integrator-ap.o
obj-$(CONFIG_CLKSRC_VERSATILE) += versatile.o
obj-$(CONFIG_CLKSRC_MIPS_GIC) += mips-gic-timer.o
obj-$(CONFIG_ASM9260_TIMER) += asm9260_timer.o
obj-$(CONFIG_H8300) += h8300_timer8.o
obj-$(CONFIG_H8300_TMR16) += h8300_timer16.o
obj-$(CONFIG_H8300_TPU) += h8300_tpu.o
/*
* H8/300 16bit Timer driver
*
* Copyright 2015 Yoshinori Sato <ysato@users.sourcefoge.jp>
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/clocksource.h>
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/of.h>
#include <asm/segment.h>
#include <asm/irq.h>
#define TSTR 0
#define TSNC 1
#define TMDR 2
#define TOLR 3
#define TISRA 4
#define TISRB 5
#define TISRC 6
#define TCR 0
#define TIOR 1
#define TCNT 2
#define GRA 4
#define GRB 6
#define FLAG_REPROGRAM (1 << 0)
#define FLAG_SKIPEVENT (1 << 1)
#define FLAG_IRQCONTEXT (1 << 2)
#define FLAG_STARTED (1 << 3)
#define ONESHOT 0
#define PERIODIC 1
#define RELATIVE 0
#define ABSOLUTE 1
struct timer16_priv {
struct platform_device *pdev;
struct clocksource cs;
struct irqaction irqaction;
unsigned long total_cycles;
unsigned long mapbase;
unsigned long mapcommon;
unsigned long flags;
unsigned short gra;
unsigned short cs_enabled;
unsigned char enb;
unsigned char imfa;
unsigned char imiea;
unsigned char ovf;
raw_spinlock_t lock;
struct clk *clk;
};
static unsigned long timer16_get_counter(struct timer16_priv *p)
{
unsigned long v1, v2, v3;
int o1, o2;
o1 = ctrl_inb(p->mapcommon + TISRC) & p->ovf;
/* Make sure the timer value is stable. Stolen from acpi_pm.c */
do {
o2 = o1;
v1 = ctrl_inw(p->mapbase + TCNT);
v2 = ctrl_inw(p->mapbase + TCNT);
v3 = ctrl_inw(p->mapbase + TCNT);
o1 = ctrl_inb(p->mapcommon + TISRC) & p->ovf;
} while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)
|| (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));
v2 |= 0x10000;
return v2;
}
static irqreturn_t timer16_interrupt(int irq, void *dev_id)
{
struct timer16_priv *p = (struct timer16_priv *)dev_id;
ctrl_outb(ctrl_inb(p->mapcommon + TISRA) & ~p->imfa,
p->mapcommon + TISRA);
p->total_cycles += 0x10000;
return IRQ_HANDLED;
}
static inline struct timer16_priv *cs_to_priv(struct clocksource *cs)
{
return container_of(cs, struct timer16_priv, cs);
}
static cycle_t timer16_clocksource_read(struct clocksource *cs)
{
struct timer16_priv *p = cs_to_priv(cs);
unsigned long flags, raw;
unsigned long value;
raw_spin_lock_irqsave(&p->lock, flags);
value = p->total_cycles;
raw = timer16_get_counter(p);
raw_spin_unlock_irqrestore(&p->lock, flags);
return value + raw;
}
static int timer16_enable(struct clocksource *cs)
{
struct timer16_priv *p = cs_to_priv(cs);
WARN_ON(p->cs_enabled);
p->total_cycles = 0;
ctrl_outw(0x0000, p->mapbase + TCNT);
ctrl_outb(0x83, p->mapbase + TCR);
ctrl_outb(ctrl_inb(p->mapcommon + TSTR) | p->enb,
p->mapcommon + TSTR);
p->cs_enabled = true;
return 0;
}
static void timer16_disable(struct clocksource *cs)
{
struct timer16_priv *p = cs_to_priv(cs);
WARN_ON(!p->cs_enabled);
ctrl_outb(ctrl_inb(p->mapcommon + TSTR) & ~p->enb,
p->mapcommon + TSTR);
p->cs_enabled = false;
}
#define REG_CH 0
#define REG_COMM 1
static int timer16_setup(struct timer16_priv *p, struct platform_device *pdev)
{
struct resource *res[2];
int ret, irq;
unsigned int ch;
memset(p, 0, sizeof(*p));
p->pdev = pdev;
res[REG_CH] = platform_get_resource(p->pdev,
IORESOURCE_MEM, REG_CH);
res[REG_COMM] = platform_get_resource(p->pdev,
IORESOURCE_MEM, REG_COMM);
if (!res[REG_CH] || !res[REG_COMM]) {
dev_err(&p->pdev->dev, "failed to get I/O memory\n");
return -ENXIO;
}
irq = platform_get_irq(p->pdev, 0);
if (irq < 0) {
dev_err(&p->pdev->dev, "failed to get irq\n");
return irq;
}
p->clk = clk_get(&p->pdev->dev, "fck");
if (IS_ERR(p->clk)) {
dev_err(&p->pdev->dev, "can't get clk\n");
return PTR_ERR(p->clk);
}
of_property_read_u32(p->pdev->dev.of_node, "renesas,channel", &ch);
p->pdev = pdev;
p->mapbase = res[REG_CH]->start;
p->mapcommon = res[REG_COMM]->start;
p->enb = 1 << ch;
p->imfa = 1 << ch;
p->imiea = 1 << (4 + ch);
p->cs.name = pdev->name;
p->cs.rating = 200;
p->cs.read = timer16_clocksource_read;
p->cs.enable = timer16_enable;
p->cs.disable = timer16_disable;
p->cs.mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8);
p->cs.flags = CLOCK_SOURCE_IS_CONTINUOUS;
ret = request_irq(irq, timer16_interrupt,
IRQF_TIMER, pdev->name, p);
if (ret < 0) {
dev_err(&p->pdev->dev, "failed to request irq %d\n", irq);
return ret;
}
clocksource_register_hz(&p->cs, clk_get_rate(p->clk) / 8);
return 0;
}
static int timer16_probe(struct platform_device *pdev)
{
struct timer16_priv *p = platform_get_drvdata(pdev);
if (p) {
dev_info(&pdev->dev, "kept as earlytimer\n");
return 0;
}
p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
if (!p)
return -ENOMEM;
return timer16_setup(p, pdev);
}
static int timer16_remove(struct platform_device *pdev)
{
return -EBUSY;
}
static const struct of_device_id timer16_of_table[] = {
{ .compatible = "renesas,16bit-timer" },
{ }
};
static struct platform_driver timer16_driver = {
.probe = timer16_probe,
.remove = timer16_remove,
.driver = {
.name = "h8300h-16timer",
.of_match_table = of_match_ptr(timer16_of_table),
}
};
static int __init timer16_init(void)
{
return platform_driver_register(&timer16_driver);
}
static void __exit timer16_exit(void)
{
platform_driver_unregister(&timer16_driver);
}
subsys_initcall(timer16_init);
module_exit(timer16_exit);
MODULE_AUTHOR("Yoshinori Sato");
MODULE_DESCRIPTION("H8/300H 16bit Timer Driver");
MODULE_LICENSE("GPL v2");
/*
* linux/arch/h8300/kernel/cpu/timer/timer8.c
*
* Yoshinori Sato <ysato@users.sourcefoge.jp>
*
* 8bit Timer driver
*
*/
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/clockchips.h>
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/of.h>
#include <asm/irq.h>
#define _8TCR 0
#define _8TCSR 2
#define TCORA 4
#define TCORB 6
#define _8TCNT 8
#define FLAG_REPROGRAM (1 << 0)
#define FLAG_SKIPEVENT (1 << 1)
#define FLAG_IRQCONTEXT (1 << 2)
#define FLAG_STARTED (1 << 3)
#define ONESHOT 0
#define PERIODIC 1
#define RELATIVE 0
#define ABSOLUTE 1
struct timer8_priv {
struct platform_device *pdev;
struct clock_event_device ced;
struct irqaction irqaction;
unsigned long mapbase;
raw_spinlock_t lock;
unsigned long flags;
unsigned int rate;
unsigned int tcora;
struct clk *pclk;
};
static unsigned long timer8_get_counter(struct timer8_priv *p)
{
unsigned long v1, v2, v3;
int o1, o2;
o1 = ctrl_inb(p->mapbase + _8TCSR) & 0x20;
/* Make sure the timer value is stable. Stolen from acpi_pm.c */
do {
o2 = o1;
v1 = ctrl_inw(p->mapbase + _8TCNT);
v2 = ctrl_inw(p->mapbase + _8TCNT);
v3 = ctrl_inw(p->mapbase + _8TCNT);
o1 = ctrl_inb(p->mapbase + _8TCSR) & 0x20;
} while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)
|| (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));
v2 |= o1 << 10;
return v2;
}
static irqreturn_t timer8_interrupt(int irq, void *dev_id)
{
struct timer8_priv *p = dev_id;
ctrl_outb(ctrl_inb(p->mapbase + _8TCSR) & ~0x40,
p->mapbase + _8TCSR);
p->flags |= FLAG_IRQCONTEXT;
ctrl_outw(p->tcora, p->mapbase + TCORA);
if (!(p->flags & FLAG_SKIPEVENT)) {
if (p->ced.mode == CLOCK_EVT_MODE_ONESHOT)
ctrl_outw(0x0000, p->mapbase + _8TCR);
p->ced.event_handler(&p->ced);
}
p->flags &= ~(FLAG_SKIPEVENT | FLAG_IRQCONTEXT);
return IRQ_HANDLED;
}
static void timer8_set_next(struct timer8_priv *p, unsigned long delta)
{
unsigned long flags;
unsigned long now;
raw_spin_lock_irqsave(&p->lock, flags);
if (delta >= 0x10000)
dev_warn(&p->pdev->dev, "delta out of range\n");
now = timer8_get_counter(p);
p->tcora = delta;
ctrl_outb(ctrl_inb(p->mapbase + _8TCR) | 0x40, p->mapbase + _8TCR);
if (delta > now)
ctrl_outw(delta, p->mapbase + TCORA);
else
ctrl_outw(now + 1, p->mapbase + TCORA);
raw_spin_unlock_irqrestore(&p->lock, flags);
}
static int timer8_enable(struct timer8_priv *p)
{
p->rate = clk_get_rate(p->pclk) / 64;
ctrl_outw(0xffff, p->mapbase + TCORA);
ctrl_outw(0x0000, p->mapbase + _8TCNT);
ctrl_outw(0x0c02, p->mapbase + _8TCR);
return 0;
}
static int timer8_start(struct timer8_priv *p)
{
int ret = 0;
unsigned long flags;
raw_spin_lock_irqsave(&p->lock, flags);
if (!(p->flags & FLAG_STARTED))
ret = timer8_enable(p);
if (ret)
goto out;
p->flags |= FLAG_STARTED;
out:
raw_spin_unlock_irqrestore(&p->lock, flags);
return ret;
}
static void timer8_stop(struct timer8_priv *p)
{
unsigned long flags;
raw_spin_lock_irqsave(&p->lock, flags);
ctrl_outw(0x0000, p->mapbase + _8TCR);
raw_spin_unlock_irqrestore(&p->lock, flags);
}
static inline struct timer8_priv *ced_to_priv(struct clock_event_device *ced)
{
return container_of(ced, struct timer8_priv, ced);
}
static void timer8_clock_event_start(struct timer8_priv *p, int periodic)
{
struct clock_event_device *ced = &p->ced;
timer8_start(p);
ced->shift = 32;
ced->mult = div_sc(p->rate, NSEC_PER_SEC, ced->shift);
ced->max_delta_ns = clockevent_delta2ns(0xffff, ced);
ced->min_delta_ns = clockevent_delta2ns(0x0001, ced);
timer8_set_next(p, periodic?(p->rate + HZ/2) / HZ:0x10000);
}
static void timer8_clock_event_mode(enum clock_event_mode mode,
struct clock_event_device *ced)
{
struct timer8_priv *p = ced_to_priv(ced);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
dev_info(&p->pdev->dev, "used for periodic clock events\n");
timer8_stop(p);
timer8_clock_event_start(p, PERIODIC);
break;
case CLOCK_EVT_MODE_ONESHOT:
dev_info(&p->pdev->dev, "used for oneshot clock events\n");
timer8_stop(p);
timer8_clock_event_start(p, ONESHOT);
break;
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
timer8_stop(p);
break;
default:
break;
}
}
static int timer8_clock_event_next(unsigned long delta,
struct clock_event_device *ced)
{
struct timer8_priv *p = ced_to_priv(ced);
BUG_ON(ced->mode != CLOCK_EVT_MODE_ONESHOT);
timer8_set_next(p, delta - 1);
return 0;
}
static int timer8_setup(struct timer8_priv *p,
struct platform_device *pdev)
{
struct resource *res;
int irq;
int ret;
memset(p, 0, sizeof(*p));
p->pdev = pdev;
res = platform_get_resource(p->pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&p->pdev->dev, "failed to get I/O memory\n");
return -ENXIO;
}
irq = platform_get_irq(p->pdev, 0);
if (irq < 0) {
dev_err(&p->pdev->dev, "failed to get irq\n");
return -ENXIO;
}
p->mapbase = res->start;
p->irqaction.name = dev_name(&p->pdev->dev);
p->irqaction.handler = timer8_interrupt;
p->irqaction.dev_id = p;
p->irqaction.flags = IRQF_TIMER;
p->pclk = clk_get(&p->pdev->dev, "fck");
if (IS_ERR(p->pclk)) {
dev_err(&p->pdev->dev, "can't get clk\n");
return PTR_ERR(p->pclk);
}
p->ced.name = pdev->name;
p->ced.features = CLOCK_EVT_FEAT_PERIODIC |
CLOCK_EVT_FEAT_ONESHOT;
p->ced.rating = 200;
p->ced.cpumask = cpumask_of(0);
p->ced.set_next_event = timer8_clock_event_next;
p->ced.set_mode = timer8_clock_event_mode;
ret = setup_irq(irq, &p->irqaction);
if (ret < 0) {
dev_err(&p->pdev->dev,
"failed to request irq %d\n", irq);
return ret;
}
clockevents_register_device(&p->ced);
platform_set_drvdata(pdev, p);
return 0;
}
static int timer8_probe(struct platform_device *pdev)
{
struct timer8_priv *p = platform_get_drvdata(pdev);
if (p) {
dev_info(&pdev->dev, "kept as earlytimer\n");
return 0;
}
p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
if (!p)
return -ENOMEM;
return timer8_setup(p, pdev);
}
static int timer8_remove(struct platform_device *pdev)
{
return -EBUSY;
}
static const struct of_device_id timer8_of_table[] __maybe_unused = {
{ .compatible = "renesas,8bit-timer" },
{ }
};
MODULE_DEVICE_TABLE(of, sh_cmt_of_table);
static struct platform_driver timer8_driver = {
.probe = timer8_probe,
.remove = timer8_remove,
.driver = {
.name = "h8300-8timer",
.of_match_table = of_match_ptr(timer8_of_table),
}
};
static int __init timer8_init(void)
{
return platform_driver_register(&timer8_driver);
}
static void __exit timer8_exit(void)
{
platform_driver_unregister(&timer8_driver);
}
subsys_initcall(timer8_init);
module_exit(timer8_exit);
MODULE_AUTHOR("Yoshinori Sato");
MODULE_DESCRIPTION("H8/300 8bit Timer Driver");
MODULE_LICENSE("GPL v2");
/*
* H8/300 TPU Driver
*
* Copyright 2015 Yoshinori Sato <ysato@users.sourcefoge.jp>
*
*/
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/clocksource.h>
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/of.h>
#include <asm/irq.h>
#define TCR 0
#define TMDR 1
#define TIOR 2
#define TER 4
#define TSR 5
#define TCNT 6
#define TGRA 8
#define TGRB 10
#define TGRC 12
#define TGRD 14
struct tpu_priv {
struct platform_device *pdev;
struct clocksource cs;
struct clk *clk;
unsigned long mapbase1;
unsigned long mapbase2;
raw_spinlock_t lock;
unsigned int cs_enabled;
};
static inline unsigned long read_tcnt32(struct tpu_priv *p)
{
unsigned long tcnt;
tcnt = ctrl_inw(p->mapbase1 + TCNT) << 16;
tcnt |= ctrl_inw(p->mapbase2 + TCNT);
return tcnt;
}
static int tpu_get_counter(struct tpu_priv *p, unsigned long long *val)
{
unsigned long v1, v2, v3;
int o1, o2;
o1 = ctrl_inb(p->mapbase1 + TSR) & 0x10;
/* Make sure the timer value is stable. Stolen from acpi_pm.c */
do {
o2 = o1;
v1 = read_tcnt32(p);
v2 = read_tcnt32(p);
v3 = read_tcnt32(p);
o1 = ctrl_inb(p->mapbase1 + TSR) & 0x10;
} while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)
|| (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));
*val = v2;
return o1;
}
static inline struct tpu_priv *cs_to_priv(struct clocksource *cs)
{
return container_of(cs, struct tpu_priv, cs);
}
static cycle_t tpu_clocksource_read(struct clocksource *cs)
{
struct tpu_priv *p = cs_to_priv(cs);
unsigned long flags;
unsigned long long value;
raw_spin_lock_irqsave(&p->lock, flags);
if (tpu_get_counter(p, &value))
value += 0x100000000;
raw_spin_unlock_irqrestore(&p->lock, flags);
return value;
}
static int tpu_clocksource_enable(struct clocksource *cs)
{
struct tpu_priv *p = cs_to_priv(cs);
WARN_ON(p->cs_enabled);
ctrl_outw(0, p->mapbase1 + TCNT);
ctrl_outw(0, p->mapbase2 + TCNT);
ctrl_outb(0x0f, p->mapbase1 + TCR);
ctrl_outb(0x03, p->mapbase2 + TCR);
p->cs_enabled = true;
return 0;
}
static void tpu_clocksource_disable(struct clocksource *cs)
{
struct tpu_priv *p = cs_to_priv(cs);
WARN_ON(!p->cs_enabled);
ctrl_outb(0, p->mapbase1 + TCR);
ctrl_outb(0, p->mapbase2 + TCR);
p->cs_enabled = false;
}
#define CH_L 0
#define CH_H 1
static int __init tpu_setup(struct tpu_priv *p, struct platform_device *pdev)
{
struct resource *res[2];
memset(p, 0, sizeof(*p));
p->pdev = pdev;
res[CH_L] = platform_get_resource(p->pdev, IORESOURCE_MEM, CH_L);
res[CH_H] = platform_get_resource(p->pdev, IORESOURCE_MEM, CH_H);
if (!res[CH_L] || !res[CH_H]) {
dev_err(&p->pdev->dev, "failed to get I/O memory\n");
return -ENXIO;
}
p->clk = clk_get(&p->pdev->dev, "fck");
if (IS_ERR(p->clk)) {
dev_err(&p->pdev->dev, "can't get clk\n");
return PTR_ERR(p->clk);
}
p->mapbase1 = res[CH_L]->start;
p->mapbase2 = res[CH_H]->start;
p->cs.name = pdev->name;
p->cs.rating = 200;
p->cs.read = tpu_clocksource_read;
p->cs.enable = tpu_clocksource_enable;
p->cs.disable = tpu_clocksource_disable;
p->cs.mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8);
p->cs.flags = CLOCK_SOURCE_IS_CONTINUOUS;
clocksource_register_hz(&p->cs, clk_get_rate(p->clk) / 64);
platform_set_drvdata(pdev, p);
return 0;
}
static int tpu_probe(struct platform_device *pdev)
{
struct tpu_priv *p = platform_get_drvdata(pdev);
if (p) {
dev_info(&pdev->dev, "kept as earlytimer\n");
return 0;
}
p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
if (!p)
return -ENOMEM;
return tpu_setup(p, pdev);
}
static int tpu_remove(struct platform_device *pdev)
{
return -EBUSY;
}
static const struct of_device_id tpu_of_table[] = {
{ .compatible = "renesas,tpu" },
{ }
};
static struct platform_driver tpu_driver = {
.probe = tpu_probe,
.remove = tpu_remove,
.driver = {
.name = "h8s-tpu",
.of_match_table = of_match_ptr(tpu_of_table),
}
};
static int __init tpu_init(void)
{
return platform_driver_register(&tpu_driver);
}
static void __exit tpu_exit(void)
{
platform_driver_unregister(&tpu_driver);
}
subsys_initcall(tpu_init);
module_exit(tpu_exit);
MODULE_AUTHOR("Yoshinori Sato");
MODULE_DESCRIPTION("H8S Timer Pulse Unit Driver");
MODULE_LICENSE("GPL v2");
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册