mirror of https://github.com/hak5/openwrt.git
bcm53xx: use clocksource patch as it was committed upstream
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> SVN-Revision: 37585lede-17.01
Hauke Mehrtens
parent
3e8c39f239
commit
333252e493
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@ -1,8 +1,8 @@
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From 403eb25e5ae7a2169d8c1eae9df4162815e7c3ba Mon Sep 17 00:00:00 2001
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From: Stuart Menefy <stuart.menefy at>
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Date: Wed, 26 Jun 2013 11:48:38 +0000
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Subject: [PATCH 01/17] clocksource:arm_global_timer: Add ARM global timer
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support.
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From 5afd20a1eeef4db1d694d58931519f65e2003503 Mon Sep 17 00:00:00 2001
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From: Stuart Menefy <stuart.menefy@st.com>
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Date: Wed, 26 Jun 2013 12:48:38 +0100
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Subject: [PATCH 01/18] clocksource: arm_global_timer: Add ARM global timer
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support
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This is a simple driver for the global timer module found in the Cortex
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A9-MP cores from revision r1p0 onwards. This should be able to perform
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@ -28,18 +28,19 @@ CC: Rob Herring <robherring2@gmail.com>
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CC: Linus Walleij <linus.walleij@linaro.org>
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CC: Will Deacon <will.deacon@arm.com>
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CC: Thomas Gleixner <tglx@linutronix.de>
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Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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---
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.../devicetree/bindings/arm/global_timer.txt | 21 ++
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.../devicetree/bindings/arm/global_timer.txt | 24 ++
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drivers/clocksource/Kconfig | 13 +
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drivers/clocksource/Makefile | 1 +
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drivers/clocksource/arm_global_timer.c | 325 ++++++++++++++++++++
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4 files changed, 360 insertions(+)
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drivers/clocksource/arm_global_timer.c | 321 ++++++++++++++++++++
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4 files changed, 359 insertions(+)
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create mode 100644 Documentation/devicetree/bindings/arm/global_timer.txt
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create mode 100644 drivers/clocksource/arm_global_timer.c
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/arm/global_timer.txt
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@@ -0,0 +1,21 @@
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@@ -0,0 +1,24 @@
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+
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+* ARM Global Timer
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+ Cortex-A9 are often associated with a per-core Global timer.
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@ -54,12 +55,15 @@ CC: Thomas Gleixner <tglx@linutronix.de>
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+- reg : Specify the base address and the size of the GT timer
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+ register window.
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+
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+- clocks : Should be phandle to a clock.
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+
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+Example:
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+
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+ timer@2c000600 {
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+ compatible = "arm,cortex-a9-global-timer";
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+ reg = <0x2c000600 0x20>;
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+ interrupts = <1 13 0xf01>;
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+ clocks = <&arm_periph_clk>;
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+ };
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--- a/drivers/clocksource/Kconfig
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+++ b/drivers/clocksource/Kconfig
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@ -93,7 +97,7 @@ CC: Thomas Gleixner <tglx@linutronix.de>
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obj-$(CONFIG_CLKSRC_METAG_GENERIC) += metag_generic.o
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--- /dev/null
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+++ b/drivers/clocksource/arm_global_timer.c
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@@ -0,0 +1,325 @@
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@@ -0,0 +1,321 @@
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+/*
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+ * drivers/clocksource/arm_global_timer.c
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+ *
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@ -117,8 +121,8 @@ CC: Thomas Gleixner <tglx@linutronix.de>
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+#include <linux/of.h>
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+#include <linux/of_irq.h>
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+#include <linux/of_address.h>
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+
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+#include <asm/sched_clock.h>
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+
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+#include <asm/cputype.h>
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+
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+#define GT_COUNTER0 0x00
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@ -186,11 +190,10 @@ CC: Thomas Gleixner <tglx@linutronix.de>
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+static void gt_compare_set(unsigned long delta, int periodic)
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+{
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+ u64 counter = gt_counter_read();
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+ unsigned long ctrl = readl(gt_base + GT_CONTROL);
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+ unsigned long ctrl;
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+
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+ counter += delta;
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+ ctrl &= ~(GT_CONTROL_COMP_ENABLE | GT_CONTROL_IRQ_ENABLE);
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+
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+ ctrl = GT_CONTROL_TIMER_ENABLE;
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+ writel(ctrl, gt_base + GT_CONTROL);
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+ writel(lower_32_bits(counter), gt_base + GT_COMP0);
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+ writel(upper_32_bits(counter), gt_base + GT_COMP1);
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@ -237,31 +240,28 @@ CC: Thomas Gleixner <tglx@linutronix.de>
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+{
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+ struct clock_event_device *evt = dev_id;
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+
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+ if (readl_relaxed(gt_base + GT_INT_STATUS) &
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+ GT_INT_STATUS_EVENT_FLAG) {
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+ /**
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+ * ERRATA 740657( Global Timer can send 2 interrupts for
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+ * the same event in single-shot mode)
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+ * Workaround:
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+ * Either disable single-shot mode.
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+ * Or
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+ * Modify the Interrupt Handler to avoid the
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+ * offending sequence. This is achieved by clearing
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+ * the Global Timer flag _after_ having incremented
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+ * the Comparator register value to a higher value.
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+ */
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+ if (!(readl_relaxed(gt_base + GT_CONTROL) &
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+ GT_CONTROL_AUTO_INC))
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+ gt_compare_set(ULONG_MAX, 0);
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+ if (!(readl_relaxed(gt_base + GT_INT_STATUS) &
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+ GT_INT_STATUS_EVENT_FLAG))
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+ return IRQ_NONE;
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+
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+ writel_relaxed(GT_INT_STATUS_EVENT_FLAG,
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+ gt_base + GT_INT_STATUS);
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+ /**
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+ * ERRATA 740657( Global Timer can send 2 interrupts for
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+ * the same event in single-shot mode)
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+ * Workaround:
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+ * Either disable single-shot mode.
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+ * Or
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+ * Modify the Interrupt Handler to avoid the
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+ * offending sequence. This is achieved by clearing
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+ * the Global Timer flag _after_ having incremented
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+ * the Comparator register value to a higher value.
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+ */
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+ if (evt->mode == CLOCK_EVT_MODE_ONESHOT)
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+ gt_compare_set(ULONG_MAX, 0);
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+
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+ evt->event_handler(evt);
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+ return IRQ_HANDLED;
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+ }
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+ writel_relaxed(GT_INT_STATUS_EVENT_FLAG, gt_base + GT_INT_STATUS);
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+ evt->event_handler(evt);
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+
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+ return IRQ_NONE;
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+ return IRQ_HANDLED;
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+}
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+
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+static int __cpuinit gt_clockevents_init(struct clock_event_device *clk)
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