86 lines
1.8 KiB
C
Executable File
86 lines
1.8 KiB
C
Executable File
#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/cdev.h>
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#include <linux/slab.h>
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#include <linux/ioctl.h>
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#include <linux/uaccess.h>
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#include <linux/of.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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struct resource *key2_res;
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struct resource *key3_res;
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static irqreturn_t fskey_handler(int irq, void *dev_id)
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{
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if (irq == key2_res->start)
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printk("K2 pressed\n");
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else
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printk("K3 pressed\n");
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return IRQ_HANDLED;
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}
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static int fskey_probe(struct platform_device *pdev)
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{
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int ret;
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key2_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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key3_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
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if (!key2_res || !key3_res) {
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ret = -ENOENT;
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goto res_err;
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}
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ret = request_irq(key2_res->start, fskey_handler, key2_res->flags & IRQF_TRIGGER_MASK, "key2", NULL);
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if (ret)
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goto key2_err;
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ret = request_irq(key3_res->start, fskey_handler, key3_res->flags & IRQF_TRIGGER_MASK, "key3", NULL);
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if (ret)
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goto key3_err;
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return 0;
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key3_err:
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free_irq(key2_res->start, NULL);
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key2_err:
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res_err:
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return ret;
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}
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static int fskey_remove(struct platform_device *pdev)
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{
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free_irq(key3_res->start, NULL);
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free_irq(key2_res->start, NULL);
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return 0;
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}
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static const struct of_device_id fskey_of_matches[] = {
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{ .compatible = "fs4412,fskey", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, fskey_of_matches);
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struct platform_driver fskey_drv = {
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.driver = {
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.name = "fskey",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(fskey_of_matches),
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},
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.probe = fskey_probe,
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.remove = fskey_remove,
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};
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module_platform_driver(fskey_drv);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Kevin Jiang <jiangxg@farsight.com.cn>");
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MODULE_DESCRIPTION("A simple device driver for Keys on FS4412 board");
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