66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/i2c-algo-bit.h>
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#include <linux/i2c-gpio.h>
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#include <linux/gpio.h>
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#include <linux/platform_device.h>
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/*
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* There are two busses in the 8815NHK.
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* They could, in theory, be driven by the hardware component, but we
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* use bit-bang through GPIO by now, to keep things simple
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*/
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static struct i2c_gpio_platform_data nhk8815_i2c_data0 = {
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/* keep defaults for timeouts; pins are push-pull bidirectional */
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.scl_pin = 62,
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.sda_pin = 63,
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};
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static struct i2c_gpio_platform_data nhk8815_i2c_data1 = {
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/* keep defaults for timeouts; pins are push-pull bidirectional */
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.scl_pin = 53,
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.sda_pin = 54,
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};
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/* first bus: GPIO XX and YY */
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static struct platform_device nhk8815_i2c_dev0 = {
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.name = "i2c-gpio",
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.id = 0,
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.dev = {
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.platform_data = &nhk8815_i2c_data0,
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},
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};
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/* second bus: GPIO XX and YY */
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static struct platform_device nhk8815_i2c_dev1 = {
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.name = "i2c-gpio",
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.id = 1,
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.dev = {
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.platform_data = &nhk8815_i2c_data1,
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},
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};
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static int __init nhk8815_i2c_init(void)
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{
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nmk_gpio_set_mode(nhk8815_i2c_data0.scl_pin, NMK_GPIO_ALT_GPIO);
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nmk_gpio_set_mode(nhk8815_i2c_data0.sda_pin, NMK_GPIO_ALT_GPIO);
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platform_device_register(&nhk8815_i2c_dev0);
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nmk_gpio_set_mode(nhk8815_i2c_data1.scl_pin, NMK_GPIO_ALT_GPIO);
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nmk_gpio_set_mode(nhk8815_i2c_data1.sda_pin, NMK_GPIO_ALT_GPIO);
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platform_device_register(&nhk8815_i2c_dev1);
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return 0;
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}
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static void __exit nhk8815_i2c_exit(void)
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{
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platform_device_unregister(&nhk8815_i2c_dev0);
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platform_device_unregister(&nhk8815_i2c_dev1);
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return;
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}
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module_init(nhk8815_i2c_init);
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module_exit(nhk8815_i2c_exit);
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