tty: serial: qcom-geni-serial: use of_device_id data

Instead of checking the device compatible in probe(), assign the
device-specific data to struct of_device_id. We'll use it later when
providing SE DMA support.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20221229155030.418800-13-brgl@bgdev.pl
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/qcom_geni_serial.c

@@ -95,6 +95,11 @@
 /* We always configure 4 bytes per FIFO word */
 #define BYTES_PER_FIFO_WORD		4U
 
+struct qcom_geni_device_data {
+	bool console;
+	void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
+};
+
 struct qcom_geni_private_data {
 	/* NOTE: earlycon port will have NULL here */
 	struct uart_driver *drv;
@@ -114,7 +119,6 @@ struct qcom_geni_serial_port {
 	u32 tx_fifo_width;
 	u32 rx_fifo_depth;
 	bool setup;
-	void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
 	unsigned int baud;
 	void *rx_fifo;
 	u32 loopback;
@@ -126,6 +130,7 @@ struct qcom_geni_serial_port {
 	bool cts_rts_swap;
 
 	struct qcom_geni_private_data private_data;
+	const struct qcom_geni_device_data *dev_data;
 };
 
 static const struct uart_ops qcom_geni_console_pops;
@@ -640,7 +645,7 @@ static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop)
 		total_bytes += last_word_byte_cnt;
 	else
 		total_bytes += BYTES_PER_FIFO_WORD;
-	port->handle_rx(uport, total_bytes, drop);
+	port->dev_data->handle_rx(uport, total_bytes, drop);
 }
 
 static void qcom_geni_serial_stop_rx(struct uart_port *uport)
@@ -1346,13 +1351,14 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 	struct uart_port *uport;
 	struct resource *res;
 	int irq;
-	bool console = false;
 	struct uart_driver *drv;
+	const struct qcom_geni_device_data *data;
 
-	if (of_device_is_compatible(pdev->dev.of_node, "qcom,geni-debug-uart"))
-		console = true;
+	data = of_device_get_match_data(&pdev->dev);
+	if (!data)
+		return -EINVAL;
 
-	if (console) {
+	if (data->console) {
 		drv = &qcom_geni_console_driver;
 		line = of_alias_get_id(pdev->dev.of_node, "serial");
 	} else {
@@ -1362,7 +1368,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 			line = of_alias_get_id(pdev->dev.of_node, "hsuart");
 	}
 
-	port = get_port_from_line(line, console);
+	port = get_port_from_line(line, data->console);
 	if (IS_ERR(port)) {
 		dev_err(&pdev->dev, "Invalid line %d\n", line);
 		return PTR_ERR(port);
@@ -1374,6 +1380,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 		return -ENODEV;
 
 	uport->dev = &pdev->dev;
+	port->dev_data = data;
 	port->se.dev = &pdev->dev;
 	port->se.wrapper = dev_get_drvdata(pdev->dev.parent);
 	port->se.clk = devm_clk_get(&pdev->dev, "se");
@@ -1392,7 +1399,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 	port->rx_fifo_depth = DEF_FIFO_DEPTH_WORDS;
 	port->tx_fifo_width = DEF_FIFO_WIDTH_BITS;
 
-	if (!console) {
+	if (!data->console) {
 		port->rx_fifo = devm_kcalloc(uport->dev,
 			port->rx_fifo_depth, sizeof(u32), GFP_KERNEL);
 		if (!port->rx_fifo)
@@ -1422,7 +1429,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 	uport->irq = irq;
 	uport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_QCOM_GENI_CONSOLE);
 
-	if (!console)
+	if (!data->console)
 		port->wakeup_irq = platform_get_irq_optional(pdev, 1);
 
 	if (of_property_read_bool(pdev->dev.of_node, "rx-tx-swap"))
@@ -1444,7 +1451,6 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 	port->private_data.drv = drv;
 	uport->private_data = &port->private_data;
 	platform_set_drvdata(pdev, port);
-	port->handle_rx = console ? handle_rx_console : handle_rx_uart;
 
 	ret = uart_add_one_port(drv, uport);
 	if (ret)
@@ -1556,6 +1562,16 @@ static int qcom_geni_serial_sys_hib_resume(struct device *dev)
 	return ret;
 }
 
+static const struct qcom_geni_device_data qcom_geni_console_data = {
+	.console = true,
+	.handle_rx = handle_rx_console,
+};
+
+static const struct qcom_geni_device_data qcom_geni_uart_data = {
+	.console = false,
+	.handle_rx = handle_rx_uart,
+};
+
 static const struct dev_pm_ops qcom_geni_serial_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(qcom_geni_serial_sys_suspend,
 					qcom_geni_serial_sys_resume)
@@ -1564,8 +1580,14 @@ static const struct dev_pm_ops qcom_geni_serial_pm_ops = {
 };
 
 static const struct of_device_id qcom_geni_serial_match_table[] = {
-	{ .compatible = "qcom,geni-debug-uart", },
-	{ .compatible = "qcom,geni-uart", },
+	{
+		.compatible = "qcom,geni-debug-uart",
+		.data = &qcom_geni_console_data,
+	},
+	{
+		.compatible = "qcom,geni-uart",
+		.data = &qcom_geni_uart_data,
+	},
 	{}
 };
 MODULE_DEVICE_TABLE(of, qcom_geni_serial_match_table);