C++ (Cpp) tegra_uart_parse_dt Examples

Example #1

File: serial-tegra.c Project: Lyude/linux

static int tegra_uart_probe(struct platform_device *pdev)
{
	struct tegra_uart_port *tup;
	struct uart_port *u;
	struct resource *resource;
	int ret;
	const struct tegra_uart_chip_data *cdata;
	const struct of_device_id *match;

	match = of_match_device(tegra_uart_of_match, &pdev->dev);
	if (!match) {
		dev_err(&pdev->dev, "Error: No device match found\n");
		return -ENODEV;
	}
	cdata = match->data;

	tup = devm_kzalloc(&pdev->dev, sizeof(*tup), GFP_KERNEL);
	if (!tup) {
		dev_err(&pdev->dev, "Failed to allocate memory for tup\n");
		return -ENOMEM;
	}

	ret = tegra_uart_parse_dt(pdev, tup);
	if (ret < 0)
		return ret;

	u = &tup->uport;
	u->dev = &pdev->dev;
	u->ops = &tegra_uart_ops;
	u->type = PORT_TEGRA;
	u->fifosize = 32;
	tup->cdata = cdata;

	platform_set_drvdata(pdev, tup);
	resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!resource) {
		dev_err(&pdev->dev, "No IO memory resource\n");
		return -ENODEV;
	}

	u->mapbase = resource->start;
	u->membase = devm_ioremap_resource(&pdev->dev, resource);
	if (IS_ERR(u->membase))
		return PTR_ERR(u->membase);

	tup->uart_clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(tup->uart_clk)) {
		dev_err(&pdev->dev, "Couldn't get the clock\n");
		return PTR_ERR(tup->uart_clk);
	}

	tup->rst = devm_reset_control_get_exclusive(&pdev->dev, "serial");
	if (IS_ERR(tup->rst)) {
		dev_err(&pdev->dev, "Couldn't get the reset\n");
		return PTR_ERR(tup->rst);
	}

	u->iotype = UPIO_MEM32;
	ret = platform_get_irq(pdev, 0);
	if (ret < 0) {
		dev_err(&pdev->dev, "Couldn't get IRQ\n");
		return ret;
	}
	u->irq = ret;
	u->regshift = 2;
	ret = uart_add_one_port(&tegra_uart_driver, u);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to add uart port, err %d\n", ret);
		return ret;
	}
	return ret;
}

Example #2

File: serial-tegra.c Project: Toradex-Apalis-TK1-AndroidTV/android_kernel_nvidia_mm

static int tegra_uart_probe(struct platform_device *pdev)
{
	struct tegra_uart_port *tup;
	struct uart_port *u;
	struct resource *resource;
	int ret;
	const struct tegra_uart_chip_data *cdata = &tegra30_uart_chip_data;
	const struct of_device_id *match = NULL;
	struct tegra_serial_platform_data *pdata = pdev->dev.platform_data;

	if (!pdev->dev.of_node)
		goto board_file;

	match = of_match_device(of_match_ptr(tegra_uart_of_match),
				&pdev->dev);
	if (!match) {
		dev_err(&pdev->dev, "Error: No device match found\n");
		return -ENODEV;
	}
	cdata = match->data;

board_file:
	tup = devm_kzalloc(&pdev->dev, sizeof(*tup), GFP_KERNEL);
	if (!tup) {
		dev_err(&pdev->dev, "Failed to allocate memory for tup\n");
		return -ENOMEM;
	}

	if (match) {
		ret = tegra_uart_parse_dt(pdev, tup);
		if (ret < 0)
			return ret;
	} else {
		tup->uport.line = pdev->id;
		tup->enable_modem_interrupt = pdata->modem_interrupt;
		tup->dma_req_sel = pdata->dma_req_selector;
	}

	u = &tup->uport;
	u->dev = &pdev->dev;
	u->ops = &tegra_uart_ops;
	u->type = PORT_TEGRA;
	u->fifosize = 32;
	tup->cdata = cdata;

	platform_set_drvdata(pdev, tup);
	resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!resource) {
		dev_err(&pdev->dev, "No IO memory resource\n");
		return -ENODEV;
	}

	u->mapbase = resource->start;
	u->membase = devm_ioremap_resource(&pdev->dev, resource);
	if (IS_ERR(u->membase))
		return PTR_ERR(u->membase);

	tup->uart_clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(tup->uart_clk)) {
		dev_err(&pdev->dev, "Couldn't get the clock\n");
		return PTR_ERR(tup->uart_clk);
	}

	u->iotype = UPIO_MEM32;
	u->irq = platform_get_irq(pdev, 0);
	u->regshift = 2;
	ret = uart_add_one_port(&tegra_uart_driver, u);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to add uart port, err %d\n", ret);
		return ret;
	}

	if (tup->enable_rx_buffer_throttle) {
		setup_timer(&tup->timer, tegra_uart_rx_buffer_throttle_timer,
				(unsigned long)tup);
		tup->timer_timeout_jiffies = msecs_to_jiffies(10);
	}
	return ret;
}