[PATCH v1 06/14] serial: 8250_bcm7271: Switch to use uart_read_port_properties()

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

Since we have now a common helper to read port properties
use it instead of sparse home grown solution.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 drivers/tty/serial/8250/8250_bcm7271.c | 53 +++++++++-----------------
 1 file changed, 18 insertions(+), 35 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_bcm7271.c b/drivers/tty/serial/8250/8250_bcm7271.c
index 1532fa2e8ec4..5a25e78857f7 100644
--- a/drivers/tty/serial/8250/8250_bcm7271.c
+++ b/drivers/tty/serial/8250/8250_bcm7271.c
@@ -942,10 +942,8 @@ static int brcmuart_probe(struct platform_device *pdev)
 	struct brcmuart_priv *priv;
 	struct clk *baud_mux_clk;
 	struct uart_8250_port up;
-	int irq;
 	void __iomem *membase = NULL;
 	resource_size_t mapbase = 0;
-	u32 clk_rate = 0;
 	int ret;
 	int x;
 	int dma_irq;
@@ -953,9 +951,6 @@ static int brcmuart_probe(struct platform_device *pdev)
 		"uart", "dma_rx", "dma_tx", "dma_intr2", "dma_arb"
 	};
 
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return irq;
 	priv = devm_kzalloc(dev, sizeof(struct brcmuart_priv),
 			GFP_KERNEL);
 	if (!priv)
@@ -1011,7 +1006,23 @@ static int brcmuart_probe(struct platform_device *pdev)
 		}
 	}
 
-	of_property_read_u32(np, "clock-frequency", &clk_rate);
+	dev_dbg(dev, "DMA is %senabled\n", priv->dma_enabled ? "" : "not ");
+
+	memset(&up, 0, sizeof(up));
+	up.port.type = PORT_BCM7271;
+	up.port.dev = dev;
+	up.port.mapbase = mapbase;
+	up.port.membase = membase;
+	up.port.handle_irq = brcmuart_handle_irq;
+	up.port.flags = UPF_BOOT_AUTOCONF | UPF_FIXED_PORT | UPF_FIXED_TYPE;
+	up.port.private_data = priv;
+
+	ret = uart_read_port_properties(&up.port, true);
+	if (ret)
+		goto release_dma;
+
+	up.port.regshift = 2;
+	up.port.iotype = device_is_big_endian(dev) ? UPIO_MEM32BE : UPIO_MEM32;
 
 	/* See if a Baud clock has been specified */
 	baud_mux_clk = devm_clk_get_optional_enabled(dev, "sw_baud");
@@ -1023,39 +1034,11 @@ static int brcmuart_probe(struct platform_device *pdev)
 
 		priv->baud_mux_clk = baud_mux_clk;
 		init_real_clk_rates(dev, priv);
-		clk_rate = priv->default_mux_rate;
+		up.port.uartclk = priv->default_mux_rate;
 	} else {
 		dev_dbg(dev, "BAUD MUX clock not specified\n");
 	}
 
-	if (clk_rate == 0) {
-		ret = dev_err_probe(dev, -EINVAL, "clock-frequency or clk not defined\n");
-		goto release_dma;
-	}
-
-	dev_dbg(dev, "DMA is %senabled\n", priv->dma_enabled ? "" : "not ");
-
-	memset(&up, 0, sizeof(up));
-	up.port.type = PORT_BCM7271;
-	up.port.uartclk = clk_rate;
-	up.port.dev = dev;
-	up.port.mapbase = mapbase;
-	up.port.membase = membase;
-	up.port.irq = irq;
-	up.port.handle_irq = brcmuart_handle_irq;
-	up.port.regshift = 2;
-	up.port.iotype = of_device_is_big_endian(np) ?
-		UPIO_MEM32BE : UPIO_MEM32;
-	up.port.flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF
-		| UPF_FIXED_PORT | UPF_FIXED_TYPE;
-	up.port.dev = dev;
-	up.port.private_data = priv;
-
-	/* Check for a fixed line number */
-	ret = of_alias_get_id(np, "serial");
-	if (ret >= 0)
-		up.port.line = ret;
-
 	/* setup HR timer */
 	hrtimer_init(&priv->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
 	priv->hrt.function = brcmuart_hrtimer_func;
-- 
2.43.0.rc1.1.gbec44491f096