Title: [7695] trunk/Documentation/blackfin: move simple gptimers example into kernel documentation
- Revision
- 7695
- Author
- vapier
- Date
- 2009-10-21 17:22:35 -0400 (Wed, 21 Oct 2009)
Log Message
move simple gptimers example into kernel documentation
Added Paths
Property Changed
Diff
Property changes: trunk/Documentation/blackfin
Added: svn:ignore
.*.cmd
.*.d
*.ko
*.mod.c
*.o
*.s
.*.tmp
.tmp_versions
Module.symvers
modules.order
Added: trunk/Documentation/blackfin/Makefile (0 => 7695)
--- trunk/Documentation/blackfin/Makefile (rev 0)
+++ trunk/Documentation/blackfin/Makefile 2009-10-21 21:22:35 UTC (rev 7695)
@@ -0,0 +1,6 @@
+obj-m := gptimers-example.o
+
+all: modules
+
+modules clean:
+ $(MAKE) -C ../.. SUBDIRS=$(PWD) $@
Added: trunk/Documentation/blackfin/gptimers-example.c (0 => 7695)
--- trunk/Documentation/blackfin/gptimers-example.c (rev 0)
+++ trunk/Documentation/blackfin/gptimers-example.c 2009-10-21 21:22:35 UTC (rev 7695)
@@ -0,0 +1,81 @@
+/*
+ * Simple gptimers example
+ * http://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:drivers:gptimers
+ *
+ * Copyright 2007-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+
+#include <asm/gptimers.h>
+#include <asm/portmux.h>
+
+/* ... random driver includes ... */
+
+#define DRIVER_NAME "gptimer_example"
+
+struct gptimer_data {
+ uint32_t period, width;
+};
+static struct gptimer_data data;
+
+/* ... random driver state ... */
+
+static irqreturn_t gptimer_example_irq(int irq, void *dev_id)
+{
+ struct gptimer_data *data = ""
+
+ /* make sure it was our timer which caused the interrupt */
+ if (!get_gptimer_intr(TIMER5_id))
+ return IRQ_NONE;
+
+ /* read the width/period values that were captured for the waveform */
+ data->width = get_gptimer_pwidth(TIMER5_id);
+ data->period = get_gptimer_period(TIMER5_id);
+
+ /* acknowledge the interrupt */
+ clear_gptimer_intr(TIMER5_id);
+
+ /* tell the upper layers we took care of things */
+ return IRQ_HANDLED;
+}
+
+/* ... random driver code ... */
+
+static int __init gptimer_example_init(void)
+{
+ int ret;
+
+ /* grab the peripheral pins */
+ ret = peripheral_request(P_TMR5, DRIVER_NAME);
+ if (ret) {
+ printk(KERN_NOTICE DRIVER_NAME ": peripheral request failed\n");
+ return ret;
+ }
+
+ /* grab the IRQ for the timer */
+ ret = request_irq(IRQ_TIMER5, gptimer_example_irq, IRQF_SHARED, DRIVER_NAME, &data);
+ if (ret) {
+ printk(KERN_NOTICE DRIVER_NAME ": IRQ request failed\n");
+ peripheral_free(P_TMR5);
+ return ret;
+ }
+
+ /* setup the timer and enable it */
+ set_gptimer_config(TIMER5_id, WDTH_CAP | PULSE_HI | PERIOD_CNT | IRQ_ENA);
+ enable_gptimers(TIMER5bit);
+
+ return 0;
+}
+module_init(gptimer_example_init);
+
+static void __exit gptimer_example_exit(void)
+{
+ disable_gptimers(TIMER5bit);
+ free_irq(IRQ_TIMER5, &data);
+ peripheral_free(P_TMR5);
+}
+module_exit(gptimer_example_exit);
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