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bcm53xx: use clocksource patch as it was committed upstream

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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 37585
This commit is contained in:
Hauke Mehrtens 2013-07-28 21:22:50 +00:00
parent 3e8c39f239
commit 333252e493
1 changed files with 36 additions and 36 deletions
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72
target/linux/bcm53xx/patches-3.10/0001-clocksource-arm_global_timer-Add-ARM-global-timer-su.patch → target/linux/bcm53xx/patches-3.10/001-clocksource-arm_global_timer-Add-ARM-global-timer-su.patch
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@ -1,8 +1,8 @@
From 403eb25e5ae7a2169d8c1eae9df4162815e7c3ba Mon Sep 17 00:00:00 2001 From 5afd20a1eeef4db1d694d58931519f65e2003503 Mon Sep 17 00:00:00 2001
From: Stuart Menefy <stuart.menefy at> From: Stuart Menefy <stuart.menefy@st.com>
Date: Wed, 26 Jun 2013 11:48:38 +0000 Date: Wed, 26 Jun 2013 12:48:38 +0100
Subject: [PATCH 01/17] clocksource:arm_global_timer: Add ARM global timer Subject: [PATCH 01/18] clocksource: arm_global_timer: Add ARM global timer
support. support
This is a simple driver for the global timer module found in the Cortex This is a simple driver for the global timer module found in the Cortex
A9-MP cores from revision r1p0 onwards. This should be able to perform A9-MP cores from revision r1p0 onwards. This should be able to perform
@ -28,18 +28,19 @@ CC: Rob Herring <robherring2@gmail.com>
CC: Linus Walleij <linus.walleij@linaro.org> CC: Linus Walleij <linus.walleij@linaro.org>
CC: Will Deacon <will.deacon@arm.com> CC: Will Deacon <will.deacon@arm.com>
CC: Thomas Gleixner <tglx@linutronix.de> CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
--- ---
.../devicetree/bindings/arm/global_timer.txt | 21 ++ .../devicetree/bindings/arm/global_timer.txt | 24 ++
drivers/clocksource/Kconfig | 13 + drivers/clocksource/Kconfig | 13 +
drivers/clocksource/Makefile | 1 + drivers/clocksource/Makefile | 1 +
drivers/clocksource/arm_global_timer.c | 325 ++++++++++++++++++++ drivers/clocksource/arm_global_timer.c | 321 ++++++++++++++++++++
4 files changed, 360 insertions(+) 4 files changed, 359 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/global_timer.txt create mode 100644 Documentation/devicetree/bindings/arm/global_timer.txt
create mode 100644 drivers/clocksource/arm_global_timer.c create mode 100644 drivers/clocksource/arm_global_timer.c
--- /dev/null --- /dev/null
+++ b/Documentation/devicetree/bindings/arm/global_timer.txt +++ b/Documentation/devicetree/bindings/arm/global_timer.txt
@@ -0,0 +1,21 @@ @@ -0,0 +1,24 @@
+ +
+* ARM Global Timer +* ARM Global Timer
+ Cortex-A9 are often associated with a per-core Global timer. + Cortex-A9 are often associated with a per-core Global timer.
@ -54,12 +55,15 @@ CC: Thomas Gleixner <tglx@linutronix.de>
+- reg : Specify the base address and the size of the GT timer +- reg : Specify the base address and the size of the GT timer
+ register window. + register window.
+ +
+- clocks : Should be phandle to a clock.
+
+Example: +Example:
+ +
+ timer@2c000600 { + timer@2c000600 {
+ compatible = "arm,cortex-a9-global-timer"; + compatible = "arm,cortex-a9-global-timer";
+ reg = <0x2c000600 0x20>; + reg = <0x2c000600 0x20>;
+ interrupts = <1 13 0xf01>; + interrupts = <1 13 0xf01>;
+ clocks = <&arm_periph_clk>;
+ }; + };
--- a/drivers/clocksource/Kconfig --- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig
@ -93,7 +97,7 @@ CC: Thomas Gleixner <tglx@linutronix.de>
obj-$(CONFIG_CLKSRC_METAG_GENERIC) += metag_generic.o obj-$(CONFIG_CLKSRC_METAG_GENERIC) += metag_generic.o
--- /dev/null --- /dev/null
+++ b/drivers/clocksource/arm_global_timer.c +++ b/drivers/clocksource/arm_global_timer.c
@@ -0,0 +1,325 @@ @@ -0,0 +1,321 @@
+/* +/*
+ * drivers/clocksource/arm_global_timer.c + * drivers/clocksource/arm_global_timer.c
+ * + *
@ -117,8 +121,8 @@ CC: Thomas Gleixner <tglx@linutronix.de>
+#include <linux/of.h> +#include <linux/of.h>
+#include <linux/of_irq.h> +#include <linux/of_irq.h>
+#include <linux/of_address.h> +#include <linux/of_address.h>
+
+#include <asm/sched_clock.h> +#include <asm/sched_clock.h>
+
+#include <asm/cputype.h> +#include <asm/cputype.h>
+ +
+#define GT_COUNTER0 0x00 +#define GT_COUNTER0 0x00
@ -186,11 +190,10 @@ CC: Thomas Gleixner <tglx@linutronix.de>
+static void gt_compare_set(unsigned long delta, int periodic) +static void gt_compare_set(unsigned long delta, int periodic)
+{ +{
+ u64 counter = gt_counter_read(); + u64 counter = gt_counter_read();
+ unsigned long ctrl = readl(gt_base + GT_CONTROL); + unsigned long ctrl;
+ +
+ counter += delta; + counter += delta;
+ ctrl &= ~(GT_CONTROL_COMP_ENABLE | GT_CONTROL_IRQ_ENABLE); + ctrl = GT_CONTROL_TIMER_ENABLE;
+
+ writel(ctrl, gt_base + GT_CONTROL); + writel(ctrl, gt_base + GT_CONTROL);
+ writel(lower_32_bits(counter), gt_base + GT_COMP0); + writel(lower_32_bits(counter), gt_base + GT_COMP0);
+ writel(upper_32_bits(counter), gt_base + GT_COMP1); + writel(upper_32_bits(counter), gt_base + GT_COMP1);
@ -237,31 +240,28 @@ CC: Thomas Gleixner <tglx@linutronix.de>
+{ +{
+ struct clock_event_device *evt = dev_id; + struct clock_event_device *evt = dev_id;
+ +
+ if (readl_relaxed(gt_base + GT_INT_STATUS) & + if (!(readl_relaxed(gt_base + GT_INT_STATUS) &
+ GT_INT_STATUS_EVENT_FLAG) { + GT_INT_STATUS_EVENT_FLAG))
+ /** + return IRQ_NONE;
+ * ERRATA 740657( Global Timer can send 2 interrupts for
+ * the same event in single-shot mode)
+ * Workaround:
+ * Either disable single-shot mode.
+ * Or
+ * Modify the Interrupt Handler to avoid the
+ * offending sequence. This is achieved by clearing
+ * the Global Timer flag _after_ having incremented
+ * the Comparator register value to a higher value.
+ */
+ if (!(readl_relaxed(gt_base + GT_CONTROL) &
+ GT_CONTROL_AUTO_INC))
+ gt_compare_set(ULONG_MAX, 0);
+ +
+ writel_relaxed(GT_INT_STATUS_EVENT_FLAG, + /**
+ gt_base + GT_INT_STATUS); + * ERRATA 740657( Global Timer can send 2 interrupts for
+ * the same event in single-shot mode)
+ * Workaround:
+ * Either disable single-shot mode.
+ * Or
+ * Modify the Interrupt Handler to avoid the
+ * offending sequence. This is achieved by clearing
+ * the Global Timer flag _after_ having incremented
+ * the Comparator register value to a higher value.
+ */
+ if (evt->mode == CLOCK_EVT_MODE_ONESHOT)
+ gt_compare_set(ULONG_MAX, 0);
+ +
+ evt->event_handler(evt); + writel_relaxed(GT_INT_STATUS_EVENT_FLAG, gt_base + GT_INT_STATUS);
+ return IRQ_HANDLED; + evt->event_handler(evt);
+ }
+ +
+ return IRQ_NONE; + return IRQ_HANDLED;
+} +}
+ +
+static int __cpuinit gt_clockevents_init(struct clock_event_device *clk) +static int __cpuinit gt_clockevents_init(struct clock_event_device *clk)