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Message-Id: <20210318160414.1.Ia2a09ce93b47eac45308205820db0938d47604df@changeid>
Date: Thu, 18 Mar 2021 16:04:50 +1100
From: Evan Benn <evanbenn@...omium.org>
To: LKML <linux-kernel@...r.kernel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Evan Benn <evanbenn@...omium.org>,
Yingjoe Chen <yingjoe.chen@...iatek.com>,
Julia Lawall <Julia.Lawall@...6.fr>,
linux-arm-kernel@...ts.infradead.org,
Stanley Chu <stanley.chu@...iatek.com>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Viresh Kumar <viresh.kumar@...aro.org>,
Fabien Parent <fparent@...libre.com>,
linux-mediatek@...ts.infradead.org,
Alexey Klimov <alexey.klimov@...aro.org>,
Catalin Marinas <catalin.marinas@....com>,
Russell King <linux@...linux.org.uk>,
Will Deacon <will@...nel.org>
Subject: [PATCH 1/2] drivers/clocksource/mediatek: Split mediatek drivers into 2 files
mtk_gpt and mtk_syst drivers for mt6577 and mt6765 devices were not
sharing any code. So split them into separate files.
Signed-off-by: Evan Benn <evanbenn@...omium.org>
---
arch/arm/mach-mediatek/Kconfig | 3 +-
arch/arm64/Kconfig.platforms | 3 +-
drivers/clocksource/Kconfig | 13 +-
drivers/clocksource/Makefile | 3 +-
...mer-mediatek.c => timer-mediatek-mt6577.c} | 100 -------------
drivers/clocksource/timer-mediatek-mt6765.c | 135 ++++++++++++++++++
6 files changed, 151 insertions(+), 106 deletions(-)
rename drivers/clocksource/{timer-mediatek.c => timer-mediatek-mt6577.c} (69%)
create mode 100644 drivers/clocksource/timer-mediatek-mt6765.c
diff --git a/arch/arm/mach-mediatek/Kconfig b/arch/arm/mach-mediatek/Kconfig
index 9e0f592d87d8..8686f992c4b6 100644
--- a/arch/arm/mach-mediatek/Kconfig
+++ b/arch/arm/mach-mediatek/Kconfig
@@ -4,7 +4,8 @@ menuconfig ARCH_MEDIATEK
depends on ARCH_MULTI_V7
select ARM_GIC
select PINCTRL
- select MTK_TIMER
+ select TIMER_MEDIATEK_MT6577
+ select TIMER_MEDIATEK_MT6765
select MFD_SYSCON
help
Support for Mediatek MT65xx & MT81xx SoCs
diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index cdfd5fed457f..d4752375ab0b 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -161,7 +161,8 @@ config ARCH_MEDIATEK
bool "MediaTek SoC Family"
select ARM_GIC
select PINCTRL
- select MTK_TIMER
+ select TIMER_MEDIATEK_MT6577
+ select TIMER_MEDIATEK_MT6765
help
This enables support for MediaTek MT27xx, MT65xx, MT76xx
& MT81xx ARMv8 SoCs
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 39aa21d01e05..d697c799284e 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -438,13 +438,20 @@ config OXNAS_RPS_TIMER
config SYS_SUPPORTS_SH_CMT
bool
-config MTK_TIMER
- bool "Mediatek timer driver" if COMPILE_TEST
+config TIMER_MEDIATEK_MT6577
+ bool "Mediatek mt6577 timer driver" if COMPILE_TEST
depends on HAS_IOMEM
select TIMER_OF
select CLKSRC_MMIO
help
- Support for Mediatek timer driver.
+ Enables clocksource and clockevent driver for Mediatek mt6577 timer.
+
+config TIMER_MEDIATEK_MT6765
+ bool "Mediatek mt6765 timer driver" if COMPILE_TEST
+ depends on HAS_IOMEM
+ select TIMER_OF
+ help
+ Enables clockevent driver for Mediatek mt6765 timer.
config SPRD_TIMER
bool "Spreadtrum timer driver" if EXPERT
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index c17ee32a7151..b1f06ce114f9 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -49,7 +49,8 @@ obj-$(CONFIG_CLKSRC_SAMSUNG_PWM) += samsung_pwm_timer.o
obj-$(CONFIG_FSL_FTM_TIMER) += timer-fsl-ftm.o
obj-$(CONFIG_VF_PIT_TIMER) += timer-vf-pit.o
obj-$(CONFIG_CLKSRC_QCOM) += timer-qcom.o
-obj-$(CONFIG_MTK_TIMER) += timer-mediatek.o
+obj-$(CONFIG_TIMER_MEDIATEK_MT6577) += timer-mediatek-mt6577.o
+obj-$(CONFIG_TIMER_MEDIATEK_MT6765) += timer-mediatek-mt6765.o
obj-$(CONFIG_CLKSRC_PISTACHIO) += timer-pistachio.o
obj-$(CONFIG_CLKSRC_TI_32K) += timer-ti-32k.o
obj-$(CONFIG_OXNAS_RPS_TIMER) += timer-oxnas-rps.o
diff --git a/drivers/clocksource/timer-mediatek.c b/drivers/clocksource/timer-mediatek-mt6577.c
similarity index 69%
rename from drivers/clocksource/timer-mediatek.c
rename to drivers/clocksource/timer-mediatek-mt6577.c
index 9318edcd8963..9e5241d1876d 100644
--- a/drivers/clocksource/timer-mediatek.c
+++ b/drivers/clocksource/timer-mediatek-mt6577.c
@@ -47,86 +47,8 @@
#define GPT_CNT_REG(val) (0x08 + (0x10 * (val)))
#define GPT_CMP_REG(val) (0x0C + (0x10 * (val)))
-/* system timer */
-#define SYST_BASE (0x40)
-
-#define SYST_CON (SYST_BASE + 0x0)
-#define SYST_VAL (SYST_BASE + 0x4)
-
-#define SYST_CON_REG(to) (timer_of_base(to) + SYST_CON)
-#define SYST_VAL_REG(to) (timer_of_base(to) + SYST_VAL)
-
-/*
- * SYST_CON_EN: Clock enable. Shall be set to
- * - Start timer countdown.
- * - Allow timeout ticks being updated.
- * - Allow changing interrupt functions.
- *
- * SYST_CON_IRQ_EN: Set to allow interrupt.
- *
- * SYST_CON_IRQ_CLR: Set to clear interrupt.
- */
-#define SYST_CON_EN BIT(0)
-#define SYST_CON_IRQ_EN BIT(1)
-#define SYST_CON_IRQ_CLR BIT(4)
-
static void __iomem *gpt_sched_reg __read_mostly;
-static void mtk_syst_ack_irq(struct timer_of *to)
-{
- /* Clear and disable interrupt */
- writel(SYST_CON_IRQ_CLR | SYST_CON_EN, SYST_CON_REG(to));
-}
-
-static irqreturn_t mtk_syst_handler(int irq, void *dev_id)
-{
- struct clock_event_device *clkevt = dev_id;
- struct timer_of *to = to_timer_of(clkevt);
-
- mtk_syst_ack_irq(to);
- clkevt->event_handler(clkevt);
-
- return IRQ_HANDLED;
-}
-
-static int mtk_syst_clkevt_next_event(unsigned long ticks,
- struct clock_event_device *clkevt)
-{
- struct timer_of *to = to_timer_of(clkevt);
-
- /* Enable clock to allow timeout tick update later */
- writel(SYST_CON_EN, SYST_CON_REG(to));
-
- /*
- * Write new timeout ticks. Timer shall start countdown
- * after timeout ticks are updated.
- */
- writel(ticks, SYST_VAL_REG(to));
-
- /* Enable interrupt */
- writel(SYST_CON_EN | SYST_CON_IRQ_EN, SYST_CON_REG(to));
-
- return 0;
-}
-
-static int mtk_syst_clkevt_shutdown(struct clock_event_device *clkevt)
-{
- /* Disable timer */
- writel(0, SYST_CON_REG(to_timer_of(clkevt)));
-
- return 0;
-}
-
-static int mtk_syst_clkevt_resume(struct clock_event_device *clkevt)
-{
- return mtk_syst_clkevt_shutdown(clkevt);
-}
-
-static int mtk_syst_clkevt_oneshot(struct clock_event_device *clkevt)
-{
- return 0;
-}
-
static u64 notrace mtk_gpt_read_sched_clock(void)
{
return readl_relaxed(gpt_sched_reg);
@@ -255,27 +177,6 @@ static struct timer_of to = {
},
};
-static int __init mtk_syst_init(struct device_node *node)
-{
- int ret;
-
- to.clkevt.features = CLOCK_EVT_FEAT_DYNIRQ | CLOCK_EVT_FEAT_ONESHOT;
- to.clkevt.set_state_shutdown = mtk_syst_clkevt_shutdown;
- to.clkevt.set_state_oneshot = mtk_syst_clkevt_oneshot;
- to.clkevt.tick_resume = mtk_syst_clkevt_resume;
- to.clkevt.set_next_event = mtk_syst_clkevt_next_event;
- to.of_irq.handler = mtk_syst_handler;
-
- ret = timer_of_init(node, &to);
- if (ret)
- return ret;
-
- clockevents_config_and_register(&to.clkevt, timer_of_rate(&to),
- TIMER_SYNC_TICKS, 0xffffffff);
-
- return 0;
-}
-
static int __init mtk_gpt_init(struct device_node *node)
{
int ret;
@@ -310,4 +211,3 @@ static int __init mtk_gpt_init(struct device_node *node)
return 0;
}
TIMER_OF_DECLARE(mtk_mt6577, "mediatek,mt6577-timer", mtk_gpt_init);
-TIMER_OF_DECLARE(mtk_mt6765, "mediatek,mt6765-timer", mtk_syst_init);
diff --git a/drivers/clocksource/timer-mediatek-mt6765.c b/drivers/clocksource/timer-mediatek-mt6765.c
new file mode 100644
index 000000000000..b4f22f226feb
--- /dev/null
+++ b/drivers/clocksource/timer-mediatek-mt6765.c
@@ -0,0 +1,135 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Mediatek SoCs General-Purpose Timer handling.
+ *
+ * Copyright (C) 2014 Matthias Brugger
+ *
+ * Matthias Brugger <matthias.bgg@...il.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/clockchips.h>
+#include <linux/clocksource.h>
+#include <linux/interrupt.h>
+#include <linux/irqreturn.h>
+#include <linux/sched_clock.h>
+#include <linux/slab.h>
+#include "timer-of.h"
+
+#define TIMER_SYNC_TICKS (3)
+
+/* system timer */
+#define SYST_BASE (0x40)
+
+#define SYST_CON (SYST_BASE + 0x0)
+#define SYST_VAL (SYST_BASE + 0x4)
+
+#define SYST_CON_REG(to) (timer_of_base(to) + SYST_CON)
+#define SYST_VAL_REG(to) (timer_of_base(to) + SYST_VAL)
+
+/*
+ * SYST_CON_EN: Clock enable. Shall be set to
+ * - Start timer countdown.
+ * - Allow timeout ticks being updated.
+ * - Allow changing interrupt functions.
+ *
+ * SYST_CON_IRQ_EN: Set to allow interrupt.
+ *
+ * SYST_CON_IRQ_CLR: Set to clear interrupt.
+ */
+#define SYST_CON_EN BIT(0)
+#define SYST_CON_IRQ_EN BIT(1)
+#define SYST_CON_IRQ_CLR BIT(4)
+
+static void mtk_syst_ack_irq(struct timer_of *to)
+{
+ /* Clear and disable interrupt */
+ writel(SYST_CON_IRQ_CLR | SYST_CON_EN, SYST_CON_REG(to));
+}
+
+static irqreturn_t mtk_syst_handler(int irq, void *dev_id)
+{
+ struct clock_event_device *clkevt = dev_id;
+ struct timer_of *to = to_timer_of(clkevt);
+
+ mtk_syst_ack_irq(to);
+ clkevt->event_handler(clkevt);
+
+ return IRQ_HANDLED;
+}
+
+static int mtk_syst_clkevt_next_event(unsigned long ticks,
+ struct clock_event_device *clkevt)
+{
+ struct timer_of *to = to_timer_of(clkevt);
+
+ /* Enable clock to allow timeout tick update later */
+ writel(SYST_CON_EN, SYST_CON_REG(to));
+
+ /*
+ * Write new timeout ticks. Timer shall start countdown
+ * after timeout ticks are updated.
+ */
+ writel(ticks, SYST_VAL_REG(to));
+
+ /* Enable interrupt */
+ writel(SYST_CON_EN | SYST_CON_IRQ_EN, SYST_CON_REG(to));
+
+ return 0;
+}
+
+static int mtk_syst_clkevt_shutdown(struct clock_event_device *clkevt)
+{
+ /* Disable timer */
+ writel(0, SYST_CON_REG(to_timer_of(clkevt)));
+
+ return 0;
+}
+
+static int mtk_syst_clkevt_resume(struct clock_event_device *clkevt)
+{
+ return mtk_syst_clkevt_shutdown(clkevt);
+}
+
+static int mtk_syst_clkevt_oneshot(struct clock_event_device *clkevt)
+{
+ return 0;
+}
+
+static struct timer_of to = {
+ .flags = TIMER_OF_IRQ | TIMER_OF_BASE | TIMER_OF_CLOCK,
+
+ .clkevt = {
+ .name = "mtk-clkevt",
+ .rating = 300,
+ .cpumask = cpu_possible_mask,
+ },
+
+ .of_irq = {
+ .flags = IRQF_TIMER | IRQF_IRQPOLL,
+ },
+};
+
+static int __init mtk_syst_init(struct device_node *node)
+{
+ int ret;
+
+ to.clkevt.features = CLOCK_EVT_FEAT_DYNIRQ | CLOCK_EVT_FEAT_ONESHOT;
+ to.clkevt.set_state_shutdown = mtk_syst_clkevt_shutdown;
+ to.clkevt.set_state_oneshot = mtk_syst_clkevt_oneshot;
+ to.clkevt.tick_resume = mtk_syst_clkevt_resume;
+ to.clkevt.set_next_event = mtk_syst_clkevt_next_event;
+ to.of_irq.handler = mtk_syst_handler;
+
+ ret = timer_of_init(node, &to);
+ if (ret)
+ return ret;
+
+ clockevents_config_and_register(&to.clkevt, timer_of_rate(&to),
+ TIMER_SYNC_TICKS, 0xffffffff);
+
+ return 0;
+}
+
+TIMER_OF_DECLARE(mtk_mt6765, "mediatek,mt6765-timer", mtk_syst_init);
--
2.31.0.rc2.261.g7f71774620-goog
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