From 184892925118d924aa9304b466946ae18c029932 Mon Sep 17 00:00:00 2001 From: Shuah Khan Date: Thu, 6 Oct 2016 16:00:50 -0600 Subject: samples: move blackfin gptimers-example from Documentation Move blackfin gptimers-example to samples and remove it from Documentation Makefile. Update samples Kconfig and Makefile to build gptimers-example. blackfin is the last CONFIG_BUILD_DOCSRC target in Documentation/Makefile. Hence this patch also includes changes to remove CONFIG_BUILD_DOCSRC from Makefile and lib/Kconfig.debug and updates VIDEO_PCI_SKELETON dependency on BUILD_DOCSRC. Documentation/Makefile is not deleted to avoid braking make htmldocs and make distclean. Acked-by: Michal Marek Acked-by: Jonathan Corbet Reviewed-by: Kees Cook Reported-by: Valentin Rothberg Reported-by: Paul Gortmaker Signed-off-by: Shuah Khan --- samples/blackfin/gptimers-example.c | 91 +++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 samples/blackfin/gptimers-example.c (limited to 'samples/blackfin/gptimers-example.c') diff --git a/samples/blackfin/gptimers-example.c b/samples/blackfin/gptimers-example.c new file mode 100644 index 000000000000..283eba993d9d --- /dev/null +++ b/samples/blackfin/gptimers-example.c @@ -0,0 +1,91 @@ +/* + * 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 +#include + +#include +#include + +/* ... random driver includes ... */ + +#define DRIVER_NAME "gptimer_example" + +#ifdef IRQ_TIMER5 +#define SAMPLE_IRQ_TIMER IRQ_TIMER5 +#else +#define SAMPLE_IRQ_TIMER IRQ_TIMER2 +#endif + +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 = dev_id; + + /* 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(SAMPLE_IRQ_TIMER, 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(SAMPLE_IRQ_TIMER, &data); + peripheral_free(P_TMR5); +} +module_exit(gptimer_example_exit); + +MODULE_LICENSE("BSD"); -- cgit v1.2.3-55-g7522