C++ (Cpp) bmm_i2c_write примеры использования

Пример #1

Файл: bmm050_driver.c Проект: deeiko/kernel_lge_e0

static int bmm_wakeup(struct i2c_client *client)
{
	int err = 0;
	int try_times = BMM_MAX_RETRY_WAKEUP;
	const u8 value = 0x01;
	u8 dummy;

	PINFO("waking up the chip...");

	while (try_times) {
		err = bmm_i2c_write(client,
				BMM_REG_NAME(POWER_CNTL), (u8 *)&value, 1);
		mdelay(BMM_I2C_WRITE_DELAY_TIME);
		dummy = 0;
		err = bmm_i2c_read(client, BMM_REG_NAME(POWER_CNTL), &dummy, 1);
		if (value == dummy)
			break;

		try_times--;
	}

	PINFO("wake up result: %s, tried times: %d",
			(try_times > 0) ? "succeed" : "fail",
			BMM_MAX_RETRY_WAKEUP - try_times + 1);

	err = (try_times > 0) ? 0 : -1;

	return err;
}

Пример #2

Файл: bmm050_driver.c Проект: TheTypoMaster/android_kernel_samsung_exynos5433

static int bmm_wakeup(struct i2c_client *client)
{
	int err = 0;
	int try_times = BMM_MAX_RETRY_WAKEUP;
	const u8 value = 0x01;
	u8 dummy;

	pr_info("%s -waking up the chip...",__func__);

	usleep_range(4900, 5000); /*BMM_I2C_WRITE_DELAY_TIME*/
	while (try_times) {
		err = bmm_i2c_write(client,
				BMM_REG_NAME(POWER_CNTL), (u8 *)&value, 1);
		usleep_range(4900, 5000);
		dummy = 0;
		err = bmm_i2c_read(client, BMM_REG_NAME(POWER_CNTL), &dummy, 1);
		if (value == dummy)
			break;

		try_times--;
	}

	pr_info("%s -wake up result: %s, tried times: %d",__func__,
			(try_times > 0) ? "succeed" : "fail",
			BMM_MAX_RETRY_WAKEUP - try_times + 1);

	err = (try_times > 0) ? 0 : -1;

	return err;
}