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clocksource/drivers/timer-mediatek: Use specific prefix for GPT 

Use specific prefix to specify the name of supported
timer hardware: "General Purpose Timer (GPT)".

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
hifive-unleashed-5.1
Stanley Chu 2018-07-06 07:11:26 +08:00 committed by Daniel Lezcano
parent 7ec58e5244
commit 56d52d3f56
1 changed files with 76 additions and 73 deletions
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149
drivers/clocksource/timer-mediatek.c
View File

@ -29,32 +29,35 @@
#include <linux/sched_clock.h>
#include <linux/slab.h>
#define GPT_IRQ_EN_REG 0x00
#define GPT_IRQ_ENABLE(val) BIT((val) - 1)
#define GPT_IRQ_ACK_REG 0x08
#define GPT_IRQ_ACK(val) BIT((val) - 1)
#define TIMER_CLK_EVT (1)
#define TIMER_CLK_SRC (2)
#define TIMER_CTRL_REG(val) (0x10 * (val))
#define TIMER_CTRL_OP(val) (((val) & 0x3) << 4)
#define TIMER_CTRL_OP_ONESHOT (0)
#define TIMER_CTRL_OP_REPEAT (1)
#define TIMER_CTRL_OP_FREERUN (3)
#define TIMER_CTRL_CLEAR (2)
#define TIMER_CTRL_ENABLE (1)
#define TIMER_CTRL_DISABLE (0)
#define TIMER_SYNC_TICKS (3)
#define TIMER_CLK_REG(val) (0x04 + (0x10 * (val)))
#define TIMER_CLK_SRC(val) (((val) & 0x1) << 4)
#define TIMER_CLK_SRC_SYS13M (0)
#define TIMER_CLK_SRC_RTC32K (1)
#define TIMER_CLK_DIV1 (0x0)
#define TIMER_CLK_DIV2 (0x1)
/* gpt */
#define GPT_IRQ_EN_REG 0x00
#define GPT_IRQ_ENABLE(val) BIT((val) - 1)
#define GPT_IRQ_ACK_REG 0x08
#define GPT_IRQ_ACK(val) BIT((val) - 1)
#define TIMER_CNT_REG(val) (0x08 + (0x10 * (val)))
#define TIMER_CMP_REG(val) (0x0C + (0x10 * (val)))
#define GPT_CTRL_REG(val) (0x10 * (val))
#define GPT_CTRL_OP(val) (((val) & 0x3) << 4)
#define GPT_CTRL_OP_ONESHOT (0)
#define GPT_CTRL_OP_REPEAT (1)
#define GPT_CTRL_OP_FREERUN (3)
#define GPT_CTRL_CLEAR (2)
#define GPT_CTRL_ENABLE (1)
#define GPT_CTRL_DISABLE (0)
#define GPT_CLK_EVT 1
#define GPT_CLK_SRC 2
#define GPT_CLK_REG(val) (0x04 + (0x10 * (val)))
#define GPT_CLK_SRC(val) (((val) & 0x1) << 4)
#define GPT_CLK_SRC_SYS13M (0)
#define GPT_CLK_SRC_RTC32K (1)
#define GPT_CLK_DIV1 (0x0)
#define GPT_CLK_DIV2 (0x1)
#define GPT_CNT_REG(val) (0x08 + (0x10 * (val)))
#define GPT_CMP_REG(val) (0x0C + (0x10 * (val)))
struct mtk_clock_event_device {
void __iomem *gpt_base;
@ -64,7 +67,7 @@ struct mtk_clock_event_device {
static void __iomem *gpt_sched_reg __read_mostly;
static u64 notrace mtk_read_sched_clock(void)
static u64 notrace mtk_gpt_read_sched_clock(void)
{
return readl_relaxed(gpt_sched_reg);
}
@ -75,22 +78,22 @@ static inline struct mtk_clock_event_device *to_mtk_clk(
return container_of(c, struct mtk_clock_event_device, dev);
}
static void mtk_clkevt_time_stop(struct mtk_clock_event_device *evt, u8 timer)
static void mtk_gpt_clkevt_time_stop(struct mtk_clock_event_device *evt, u8 timer)
{
u32 val;
val = readl(evt->gpt_base + TIMER_CTRL_REG(timer));
writel(val & ~TIMER_CTRL_ENABLE, evt->gpt_base +
TIMER_CTRL_REG(timer));
val = readl(evt->gpt_base + GPT_CTRL_REG(timer));
writel(val & ~GPT_CTRL_ENABLE, evt->gpt_base +
GPT_CTRL_REG(timer));
}
static void mtk_clkevt_time_setup(struct mtk_clock_event_device *evt,
static void mtk_gpt_clkevt_time_setup(struct mtk_clock_event_device *evt,
unsigned long delay, u8 timer)
{
writel(delay, evt->gpt_base + TIMER_CMP_REG(timer));
writel(delay, evt->gpt_base + GPT_CMP_REG(timer));
}
static void mtk_clkevt_time_start(struct mtk_clock_event_device *evt,
static void mtk_gpt_clkevt_time_start(struct mtk_clock_event_device *evt,
bool periodic, u8 timer)
{
u32 val;
@ -98,75 +101,75 @@ static void mtk_clkevt_time_start(struct mtk_clock_event_device *evt,
/* Acknowledge interrupt */
writel(GPT_IRQ_ACK(timer), evt->gpt_base + GPT_IRQ_ACK_REG);
val = readl(evt->gpt_base + TIMER_CTRL_REG(timer));
val = readl(evt->gpt_base + GPT_CTRL_REG(timer));
/* Clear 2 bit timer operation mode field */
val &= ~TIMER_CTRL_OP(0x3);
val &= ~GPT_CTRL_OP(0x3);
if (periodic)
val |= TIMER_CTRL_OP(TIMER_CTRL_OP_REPEAT);
val |= GPT_CTRL_OP(GPT_CTRL_OP_REPEAT);
else
val |= TIMER_CTRL_OP(TIMER_CTRL_OP_ONESHOT);
val |= GPT_CTRL_OP(GPT_CTRL_OP_ONESHOT);
writel(val | TIMER_CTRL_ENABLE | TIMER_CTRL_CLEAR,
evt->gpt_base + TIMER_CTRL_REG(timer));
writel(val | GPT_CTRL_ENABLE | GPT_CTRL_CLEAR,
evt->gpt_base + GPT_CTRL_REG(timer));
}
static int mtk_clkevt_shutdown(struct clock_event_device *clk)
static int mtk_gpt_clkevt_shutdown(struct clock_event_device *clk)
{
mtk_clkevt_time_stop(to_mtk_clk(clk), GPT_CLK_EVT);
mtk_gpt_clkevt_time_stop(to_mtk_clk(clk), TIMER_CLK_EVT);
return 0;
}
static int mtk_clkevt_set_periodic(struct clock_event_device *clk)
static int mtk_gpt_clkevt_set_periodic(struct clock_event_device *clk)
{
struct mtk_clock_event_device *evt = to_mtk_clk(clk);
mtk_clkevt_time_stop(evt, GPT_CLK_EVT);
mtk_clkevt_time_setup(evt, evt->ticks_per_jiffy, GPT_CLK_EVT);
mtk_clkevt_time_start(evt, true, GPT_CLK_EVT);
mtk_gpt_clkevt_time_stop(evt, TIMER_CLK_EVT);
mtk_gpt_clkevt_time_setup(evt, evt->ticks_per_jiffy, TIMER_CLK_EVT);
mtk_gpt_clkevt_time_start(evt, true, TIMER_CLK_EVT);
return 0;
}
static int mtk_clkevt_next_event(unsigned long event,
static int mtk_gpt_clkevt_next_event(unsigned long event,
struct clock_event_device *clk)
{
struct mtk_clock_event_device *evt = to_mtk_clk(clk);
mtk_clkevt_time_stop(evt, GPT_CLK_EVT);
mtk_clkevt_time_setup(evt, event, GPT_CLK_EVT);
mtk_clkevt_time_start(evt, false, GPT_CLK_EVT);
mtk_gpt_clkevt_time_stop(evt, TIMER_CLK_EVT);
mtk_gpt_clkevt_time_setup(evt, event, TIMER_CLK_EVT);
mtk_gpt_clkevt_time_start(evt, false, TIMER_CLK_EVT);
return 0;
}
static irqreturn_t mtk_timer_interrupt(int irq, void *dev_id)
static irqreturn_t mtk_gpt_interrupt(int irq, void *dev_id)
{
struct mtk_clock_event_device *evt = dev_id;
/* Acknowledge timer0 irq */
writel(GPT_IRQ_ACK(GPT_CLK_EVT), evt->gpt_base + GPT_IRQ_ACK_REG);
writel(GPT_IRQ_ACK(TIMER_CLK_EVT), evt->gpt_base + GPT_IRQ_ACK_REG);
evt->dev.event_handler(&evt->dev);
return IRQ_HANDLED;
}
static void
__init mtk_timer_setup(struct mtk_clock_event_device *evt, u8 timer, u8 option)
__init mtk_gpt_setup(struct mtk_clock_event_device *evt, u8 timer, u8 option)
{
writel(TIMER_CTRL_CLEAR | TIMER_CTRL_DISABLE,
evt->gpt_base + TIMER_CTRL_REG(timer));
writel(GPT_CTRL_CLEAR | GPT_CTRL_DISABLE,
evt->gpt_base + GPT_CTRL_REG(timer));
writel(TIMER_CLK_SRC(TIMER_CLK_SRC_SYS13M) | TIMER_CLK_DIV1,
evt->gpt_base + TIMER_CLK_REG(timer));
writel(GPT_CLK_SRC(GPT_CLK_SRC_SYS13M) | GPT_CLK_DIV1,
evt->gpt_base + GPT_CLK_REG(timer));
writel(0x0, evt->gpt_base + TIMER_CMP_REG(timer));
writel(0x0, evt->gpt_base + GPT_CMP_REG(timer));
writel(TIMER_CTRL_OP(option) | TIMER_CTRL_ENABLE,
evt->gpt_base + TIMER_CTRL_REG(timer));
writel(GPT_CTRL_OP(option) | GPT_CTRL_ENABLE,
evt->gpt_base + GPT_CTRL_REG(timer));
}
static void mtk_timer_enable_irq(struct mtk_clock_event_device *evt, u8 timer)
static void mtk_gpt_enable_irq(struct mtk_clock_event_device *evt, u8 timer)
{
u32 val;
@ -181,7 +184,7 @@ static void mtk_timer_enable_irq(struct mtk_clock_event_device *evt, u8 timer)
evt->gpt_base + GPT_IRQ_EN_REG);
}
static int __init mtk_timer_init(struct device_node *node)
static int __init mtk_gpt_init(struct device_node *node)
{
struct mtk_clock_event_device *evt;
struct resource res;
@ -195,14 +198,14 @@ static int __init mtk_timer_init(struct device_node *node)
evt->dev.name = "mtk_tick";
evt->dev.rating = 300;
evt->dev.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
evt->dev.set_state_shutdown = mtk_clkevt_shutdown;
evt->dev.set_state_periodic = mtk_clkevt_set_periodic;
evt->dev.set_state_oneshot = mtk_clkevt_shutdown;
evt->dev.tick_resume = mtk_clkevt_shutdown;
evt->dev.set_next_event = mtk_clkevt_next_event;
evt->dev.set_state_shutdown = mtk_gpt_clkevt_shutdown;
evt->dev.set_state_periodic = mtk_gpt_clkevt_set_periodic;
evt->dev.set_state_oneshot = mtk_gpt_clkevt_shutdown;
evt->dev.tick_resume = mtk_gpt_clkevt_shutdown;
evt->dev.set_next_event = mtk_gpt_clkevt_next_event;
evt->dev.cpumask = cpu_possible_mask;
evt->gpt_base = of_io_request_and_map(node, 0, "mtk-timer");
evt->gpt_base = of_io_request_and_map(node, 0, "mtk-timer-gpt");
if (IS_ERR(evt->gpt_base)) {
pr_err("Can't get resource\n");
goto err_kzalloc;
@ -226,7 +229,7 @@ static int __init mtk_timer_init(struct device_node *node)
}
rate = clk_get_rate(clk);
if (request_irq(evt->dev.irq, mtk_timer_interrupt,
if (request_irq(evt->dev.irq, mtk_gpt_interrupt,
IRQF_TIMER | IRQF_IRQPOLL, "mtk_timer", evt)) {
pr_err("failed to setup irq %d\n", evt->dev.irq);
goto err_clk_disable;
@ -235,18 +238,18 @@ static int __init mtk_timer_init(struct device_node *node)
evt->ticks_per_jiffy = DIV_ROUND_UP(rate, HZ);
/* Configure clock source */
mtk_timer_setup(evt, GPT_CLK_SRC, TIMER_CTRL_OP_FREERUN);
clocksource_mmio_init(evt->gpt_base + TIMER_CNT_REG(GPT_CLK_SRC),
mtk_gpt_setup(evt, TIMER_CLK_SRC, GPT_CTRL_OP_FREERUN);
clocksource_mmio_init(evt->gpt_base + GPT_CNT_REG(TIMER_CLK_SRC),
node->name, rate, 300, 32, clocksource_mmio_readl_up);
gpt_sched_reg = evt->gpt_base + TIMER_CNT_REG(GPT_CLK_SRC);
sched_clock_register(mtk_read_sched_clock, 32, rate);
gpt_sched_reg = evt->gpt_base + GPT_CNT_REG(TIMER_CLK_SRC);
sched_clock_register(mtk_gpt_read_sched_clock, 32, rate);
/* Configure clock event */
mtk_timer_setup(evt, GPT_CLK_EVT, TIMER_CTRL_OP_REPEAT);
clockevents_config_and_register(&evt->dev, rate, 0x3,
mtk_gpt_setup(evt, TIMER_CLK_EVT, GPT_CTRL_OP_REPEAT);
clockevents_config_and_register(&evt->dev, rate, TIMER_SYNC_TICKS,
0xffffffff);
mtk_timer_enable_irq(evt, GPT_CLK_EVT);
mtk_gpt_enable_irq(evt, TIMER_CLK_EVT);
return 0;
@ -265,4 +268,4 @@ err_kzalloc:
return -EINVAL;
}
TIMER_OF_DECLARE(mtk_mt6577, "mediatek,mt6577-timer", mtk_timer_init);
TIMER_OF_DECLARE(mtk_mt6577, "mediatek,mt6577-timer", mtk_gpt_init);