summaryrefslogtreecommitdiff
path: root/target/linux/sunxi/patches-3.12/136-clksrc-add-hstimer.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/sunxi/patches-3.12/136-clksrc-add-hstimer.patch')
-rw-r--r--target/linux/sunxi/patches-3.12/136-clksrc-add-hstimer.patch297
1 files changed, 0 insertions, 297 deletions
diff --git a/target/linux/sunxi/patches-3.12/136-clksrc-add-hstimer.patch b/target/linux/sunxi/patches-3.12/136-clksrc-add-hstimer.patch
deleted file mode 100644
index db54eb8..0000000
--- a/target/linux/sunxi/patches-3.12/136-clksrc-add-hstimer.patch
+++ /dev/null
@@ -1,297 +0,0 @@
-From 3bf30f6381f9287eb99ce096bf2fa327a69c8a71 Mon Sep 17 00:00:00 2001
-From: Maxime Ripard <maxime.ripard@free-electrons.com>
-Date: Thu, 7 Nov 2013 12:01:48 +0100
-Subject: [PATCH] clocksource: Add Allwinner SoCs HS timers driver
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Most of the Allwinner SoCs (at this time, all but the A10) also have a
-High Speed timers that are not using the 24MHz oscillator as a source
-but rather the AHB clock running much faster.
-
-The IP is slightly different between the A10s/A13 and the one used in
-the A20/A31, since the latter have 4 timers available, while the former
-have only 2 of them.
-
-[dlezcano] : Fixed conflict with b788beda "Order Kconfig options
- alphabetically"
-
-Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
-Tested-by: Emilio López <emilio@elopez.com.ar>
-Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
----
- .../bindings/timer/allwinner,sun5i-a13-hstimer.txt | 22 +++
- arch/arm/mach-sunxi/Kconfig | 1 +
- drivers/clocksource/Kconfig | 4 +
- drivers/clocksource/Makefile | 1 +
- drivers/clocksource/timer-sun5i.c | 192 +++++++++++++++++++++
- 5 files changed, 220 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/timer/allwinner,sun5i-a13-hstimer.txt
- create mode 100644 drivers/clocksource/timer-sun5i.c
-
-diff --git a/Documentation/devicetree/bindings/timer/allwinner,sun5i-a13-hstimer.txt b/Documentation/devicetree/bindings/timer/allwinner,sun5i-a13-hstimer.txt
-new file mode 100644
-index 0000000..7c26154
---- /dev/null
-+++ b/Documentation/devicetree/bindings/timer/allwinner,sun5i-a13-hstimer.txt
-@@ -0,0 +1,22 @@
-+Allwinner SoCs High Speed Timer Controller
-+
-+Required properties:
-+
-+- compatible : should be "allwinner,sun5i-a13-hstimer" or
-+ "allwinner,sun7i-a20-hstimer"
-+- reg : Specifies base physical address and size of the registers.
-+- interrupts : The interrupts of these timers (2 for the sun5i IP, 4 for the sun7i
-+ one)
-+- clocks: phandle to the source clock (usually the AHB clock)
-+
-+Example:
-+
-+timer@01c60000 {
-+ compatible = "allwinner,sun7i-a20-hstimer";
-+ reg = <0x01c60000 0x1000>;
-+ interrupts = <0 51 1>,
-+ <0 52 1>,
-+ <0 53 1>,
-+ <0 54 1>;
-+ clocks = <&ahb1_gates 19>;
-+};
-diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
-index e3457b9..547004c 100644
---- a/arch/arm/mach-sunxi/Kconfig
-+++ b/arch/arm/mach-sunxi/Kconfig
-@@ -13,3 +13,4 @@ config ARCH_SUNXI
- select PINCTRL_SUNXI
- select SPARSE_IRQ
- select SUN4I_TIMER
-+ select SUN5I_HSTIMER
-diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
-index 634c4d6..cd6950f 100644
---- a/drivers/clocksource/Kconfig
-+++ b/drivers/clocksource/Kconfig
-@@ -37,6 +37,10 @@ config SUN4I_TIMER
- select CLKSRC_MMIO
- bool
-
-+config SUN5I_HSTIMER
-+ select CLKSRC_MMIO
-+ bool
-+
- config VT8500_TIMER
- bool
-
-diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
-index 33621ef..358358d 100644
---- a/drivers/clocksource/Makefile
-+++ b/drivers/clocksource/Makefile
-@@ -22,6 +22,7 @@ obj-$(CONFIG_ARCH_MOXART) += moxart_timer.o
- obj-$(CONFIG_ARCH_MXS) += mxs_timer.o
- obj-$(CONFIG_ARCH_PRIMA2) += timer-prima2.o
- obj-$(CONFIG_SUN4I_TIMER) += sun4i_timer.o
-+obj-$(CONFIG_SUN5I_HSTIMER) += timer-sun5i.o
- obj-$(CONFIG_ARCH_TEGRA) += tegra20_timer.o
- obj-$(CONFIG_VT8500_TIMER) += vt8500_timer.o
- obj-$(CONFIG_ARCH_NSPIRE) += zevio-timer.o
-diff --git a/drivers/clocksource/timer-sun5i.c b/drivers/clocksource/timer-sun5i.c
-new file mode 100644
-index 0000000..bddc522
---- /dev/null
-+++ b/drivers/clocksource/timer-sun5i.c
-@@ -0,0 +1,192 @@
-+/*
-+ * Allwinner SoCs hstimer driver.
-+ *
-+ * Copyright (C) 2013 Maxime Ripard
-+ *
-+ * Maxime Ripard <maxime.ripard@free-electrons.com>
-+ *
-+ * This file is licensed under the terms of the GNU General Public
-+ * License version 2. This program is licensed "as is" without any
-+ * warranty of any kind, whether express or implied.
-+ */
-+
-+#include <linux/clk.h>
-+#include <linux/clockchips.h>
-+#include <linux/delay.h>
-+#include <linux/interrupt.h>
-+#include <linux/irq.h>
-+#include <linux/irqreturn.h>
-+#include <linux/sched_clock.h>
-+#include <linux/of.h>
-+#include <linux/of_address.h>
-+#include <linux/of_irq.h>
-+
-+#define TIMER_IRQ_EN_REG 0x00
-+#define TIMER_IRQ_EN(val) BIT(val)
-+#define TIMER_IRQ_ST_REG 0x04
-+#define TIMER_CTL_REG(val) (0x20 * (val) + 0x10)
-+#define TIMER_CTL_ENABLE BIT(0)
-+#define TIMER_CTL_RELOAD BIT(1)
-+#define TIMER_CTL_CLK_PRES(val) (((val) & 0x7) << 4)
-+#define TIMER_CTL_ONESHOT BIT(7)
-+#define TIMER_INTVAL_LO_REG(val) (0x20 * (val) + 0x14)
-+#define TIMER_INTVAL_HI_REG(val) (0x20 * (val) + 0x18)
-+#define TIMER_CNTVAL_LO_REG(val) (0x20 * (val) + 0x1c)
-+#define TIMER_CNTVAL_HI_REG(val) (0x20 * (val) + 0x20)
-+
-+#define TIMER_SYNC_TICKS 3
-+
-+static void __iomem *timer_base;
-+static u32 ticks_per_jiffy;
-+
-+/*
-+ * When we disable a timer, we need to wait at least for 2 cycles of
-+ * the timer source clock. We will use for that the clocksource timer
-+ * that is already setup and runs at the same frequency than the other
-+ * timers, and we never will be disabled.
-+ */
-+static void sun5i_clkevt_sync(void)
-+{
-+ u32 old = readl(timer_base + TIMER_CNTVAL_LO_REG(1));
-+
-+ while ((old - readl(timer_base + TIMER_CNTVAL_LO_REG(1))) < TIMER_SYNC_TICKS)
-+ cpu_relax();
-+}
-+
-+static void sun5i_clkevt_time_stop(u8 timer)
-+{
-+ u32 val = readl(timer_base + TIMER_CTL_REG(timer));
-+ writel(val & ~TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG(timer));
-+
-+ sun5i_clkevt_sync();
-+}
-+
-+static void sun5i_clkevt_time_setup(u8 timer, u32 delay)
-+{
-+ writel(delay, timer_base + TIMER_INTVAL_LO_REG(timer));
-+}
-+
-+static void sun5i_clkevt_time_start(u8 timer, bool periodic)
-+{
-+ u32 val = readl(timer_base + TIMER_CTL_REG(timer));
-+
-+ if (periodic)
-+ val &= ~TIMER_CTL_ONESHOT;
-+ else
-+ val |= TIMER_CTL_ONESHOT;
-+
-+ writel(val | TIMER_CTL_ENABLE | TIMER_CTL_RELOAD,
-+ timer_base + TIMER_CTL_REG(timer));
-+}
-+
-+static void sun5i_clkevt_mode(enum clock_event_mode mode,
-+ struct clock_event_device *clk)
-+{
-+ switch (mode) {
-+ case CLOCK_EVT_MODE_PERIODIC:
-+ sun5i_clkevt_time_stop(0);
-+ sun5i_clkevt_time_setup(0, ticks_per_jiffy);
-+ sun5i_clkevt_time_start(0, true);
-+ break;
-+ case CLOCK_EVT_MODE_ONESHOT:
-+ sun5i_clkevt_time_stop(0);
-+ sun5i_clkevt_time_start(0, false);
-+ break;
-+ case CLOCK_EVT_MODE_UNUSED:
-+ case CLOCK_EVT_MODE_SHUTDOWN:
-+ default:
-+ sun5i_clkevt_time_stop(0);
-+ break;
-+ }
-+}
-+
-+static int sun5i_clkevt_next_event(unsigned long evt,
-+ struct clock_event_device *unused)
-+{
-+ sun5i_clkevt_time_stop(0);
-+ sun5i_clkevt_time_setup(0, evt - TIMER_SYNC_TICKS);
-+ sun5i_clkevt_time_start(0, false);
-+
-+ return 0;
-+}
-+
-+static struct clock_event_device sun5i_clockevent = {
-+ .name = "sun5i_tick",
-+ .rating = 340,
-+ .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-+ .set_mode = sun5i_clkevt_mode,
-+ .set_next_event = sun5i_clkevt_next_event,
-+};
-+
-+
-+static irqreturn_t sun5i_timer_interrupt(int irq, void *dev_id)
-+{
-+ struct clock_event_device *evt = (struct clock_event_device *)dev_id;
-+
-+ writel(0x1, timer_base + TIMER_IRQ_ST_REG);
-+ evt->event_handler(evt);
-+
-+ return IRQ_HANDLED;
-+}
-+
-+static struct irqaction sun5i_timer_irq = {
-+ .name = "sun5i_timer0",
-+ .flags = IRQF_TIMER | IRQF_IRQPOLL,
-+ .handler = sun5i_timer_interrupt,
-+ .dev_id = &sun5i_clockevent,
-+};
-+
-+static u32 sun5i_timer_sched_read(void)
-+{
-+ return ~readl(timer_base + TIMER_CNTVAL_LO_REG(1));
-+}
-+
-+static void __init sun5i_timer_init(struct device_node *node)
-+{
-+ unsigned long rate;
-+ struct clk *clk;
-+ int ret, irq;
-+ u32 val;
-+
-+ timer_base = of_iomap(node, 0);
-+ if (!timer_base)
-+ panic("Can't map registers");
-+
-+ irq = irq_of_parse_and_map(node, 0);
-+ if (irq <= 0)
-+ panic("Can't parse IRQ");
-+
-+ clk = of_clk_get(node, 0);
-+ if (IS_ERR(clk))
-+ panic("Can't get timer clock");
-+ clk_prepare_enable(clk);
-+ rate = clk_get_rate(clk);
-+
-+ writel(~0, timer_base + TIMER_INTVAL_LO_REG(1));
-+ writel(TIMER_CTL_ENABLE | TIMER_CTL_RELOAD,
-+ timer_base + TIMER_CTL_REG(1));
-+
-+ setup_sched_clock(sun5i_timer_sched_read, 32, rate);
-+ clocksource_mmio_init(timer_base + TIMER_CNTVAL_LO_REG(1), node->name,
-+ rate, 340, 32, clocksource_mmio_readl_down);
-+
-+ ticks_per_jiffy = DIV_ROUND_UP(rate, HZ);
-+
-+ ret = setup_irq(irq, &sun5i_timer_irq);
-+ if (ret)
-+ pr_warn("failed to setup irq %d\n", irq);
-+
-+ /* Enable timer0 interrupt */
-+ val = readl(timer_base + TIMER_IRQ_EN_REG);
-+ writel(val | TIMER_IRQ_EN(0), timer_base + TIMER_IRQ_EN_REG);
-+
-+ sun5i_clockevent.cpumask = cpu_possible_mask;
-+ sun5i_clockevent.irq = irq;
-+
-+ clockevents_config_and_register(&sun5i_clockevent, rate,
-+ TIMER_SYNC_TICKS, 0xffffffff);
-+}
-+CLOCKSOURCE_OF_DECLARE(sun5i_a13, "allwinner,sun5i-a13-hstimer",
-+ sun5i_timer_init);
-+CLOCKSOURCE_OF_DECLARE(sun7i_a20, "allwinner,sun7i-a20-hstimer",
-+ sun5i_timer_init);
---
-1.8.5.1
-
generated by cgit v1.1 at 2024-12-15 06:54:36 +0000