C++ (Cpp) i2cdriver_subscribe_bus_updates Examples

Example #1

File: tps65217.c Project: junzhe/minix_pandaboard_es

static int
sef_cb_init(int type, sef_init_info_t * UNUSED(info))
{
	int r;

	if (type == SEF_INIT_LU) {
		/* Restore the state. */
		lu_state_restore();
	}

	/* look-up the endpoint for the bus driver */
	bus_endpoint = i2cdriver_bus_endpoint(bus);
	if (bus_endpoint == 0) {
		log_warn(&log, "Couldn't find bus driver.\n");
		return EXIT_FAILURE;
	}

	/* claim the device */
	r = i2cdriver_reserve_device(bus_endpoint, address);
	if (r != OK) {
		log_warn(&log, "Couldn't reserve device 0x%x (r=%d)\n",
		    address, r);
		return EXIT_FAILURE;
	}

	/* check that the chip / rev is reasonable */
	r = check_revision();
	if (r != OK) {
		/* prevent user from using the driver with a different chip */
		log_warn(&log, "Bad CHIPID\n");
		return EXIT_FAILURE;
	}

	/* enable interrupts */
	r = intr_enable();
	if (r != OK) {
		log_warn(&log, "Failed to enable interrupts.\n");
		return EXIT_FAILURE;
	}

	/* enable power-off pin so the kernel can cut power to the SoC */
	enable_pwr_off();

	if (type != SEF_INIT_LU) {

		/* sign up for updates about the i2c bus going down/up */
		r = i2cdriver_subscribe_bus_updates(bus);
		if (r != OK) {
			log_warn(&log, "Couldn't subscribe to bus updates\n");
			return EXIT_FAILURE;
		}

		i2cdriver_announce(bus);
		log_debug(&log, "announced\n");
	}

	return OK;
}

Example #2

File: tps65950.c Project: anuragpeshne/minix

static int
sef_cb_init(int type, sef_init_info_t * UNUSED(info))
{
	int r, i;

	if (type == SEF_INIT_LU) {
		/* Restore the state. */
		lu_state_restore();
	}

	/* look-up the endpoint for the bus driver */
	bus_endpoint = i2cdriver_bus_endpoint(bus);
	if (bus_endpoint == 0) {
		log_warn(&log, "Couldn't find bus driver.\n");
		return EXIT_FAILURE;
	}

	for (i = 0; i < NADDRESSES; i++) {

		/* claim the device */
		r = i2cdriver_reserve_device(bus_endpoint, addresses[i]);
		if (r != OK) {
			log_warn(&log, "Couldn't reserve device 0x%x (r=%d)\n",
			    addresses[i], r);
			return EXIT_FAILURE;
		}
	}

	/* check that the chip / rev is reasonable */
	r = check_revision();
	if (r != OK) {
		/* prevent user from using the driver with a different chip */
		log_warn(&log, "Bad IDCODE\n");
		return EXIT_FAILURE;
	}

	r = rtc_init();
	if (r != OK) {
		log_warn(&log, "RTC Start-up Failed\n");
		return EXIT_FAILURE;
	}

	if (type != SEF_INIT_LU) {

		/* sign up for updates about the i2c bus going down/up */
		r = i2cdriver_subscribe_bus_updates(bus);
		if (r != OK) {
			log_warn(&log, "Couldn't subscribe to bus updates\n");
			return EXIT_FAILURE;
		}

		i2cdriver_announce(bus);
		log_debug(&log, "announced\n");
	}

	return OK;
}

Example #3

File: tda19988.c Project: Hooman3/minix

static int
sef_cb_init(int type, sef_init_info_t * UNUSED(info))
{
	int r;

	if (type == SEF_INIT_LU) {
		/* Restore the state. */
		lu_state_restore();
	}

	geom[TDA19988_DEV].dv_base = ((u64_t) (0));
	geom[TDA19988_DEV].dv_size = ((u64_t) (128));

	/*
	 * CEC Module
	 */

	/* look-up the endpoint for the bus driver */
	cec_bus_endpoint = i2cdriver_bus_endpoint(cec_bus);
	if (cec_bus_endpoint == 0) {
		log_warn(&log, "Couldn't find bus driver.\n");
		return EXIT_FAILURE;
	}

	/* claim the device */
	r = i2cdriver_reserve_device(cec_bus_endpoint, cec_address);
	if (r != OK) {
		log_warn(&log, "Couldn't reserve device 0x%x (r=%d)\n",
		    cec_address, r);
		return EXIT_FAILURE;
	}

	/*
	 * HDMI Module
	 */

	/* look-up the endpoint for the bus driver */
	hdmi_bus_endpoint = i2cdriver_bus_endpoint(hdmi_bus);
	if (hdmi_bus_endpoint == 0) {
		log_warn(&log, "Couldn't find bus driver.\n");
		return EXIT_FAILURE;
	}

	/* claim the device */
	r = i2cdriver_reserve_device(hdmi_bus_endpoint, hdmi_address);
	if (r != OK) {
		log_warn(&log, "Couldn't reserve device 0x%x (r=%d)\n",
		    hdmi_address, r);
		return EXIT_FAILURE;
	}

	if (type != SEF_INIT_LU) {

		/* sign up for updates about the i2c bus going down/up */
		r = i2cdriver_subscribe_bus_updates(cec_bus);
		if (r != OK) {
			log_warn(&log, "Couldn't subscribe to bus updates\n");
			return EXIT_FAILURE;
		}

		/* sign up for updates about the i2c bus going down/up */
		r = i2cdriver_subscribe_bus_updates(hdmi_bus);
		if (r != OK) {
			log_warn(&log, "Couldn't subscribe to bus updates\n");
			return EXIT_FAILURE;
		}

		i2cdriver_announce(cec_bus);
		if (cec_bus != hdmi_bus) {
			i2cdriver_announce(hdmi_bus);
		}

		blockdriver_announce(type);
		log_trace(&log, "announced\n");
	}

	return OK;
}