linux-kernel - [PATCH 1/1] tty: serial: qcom_geni_serial: Configure UART_IO_MACRO

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Date:   Thu, 23 Jan 2020 18:11:50 +0530
From:   Roja Rani Yarubandi <rojay@...eaurora.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     akashast@...eaurora.org, msavaliy@....qualcomm.com,
        mgautam@...eaurora.org, skakit@...eaurora.org,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Jiri Slaby <jslaby@...e.com>, linux-arm-msm@...r.kernel.org,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Roja Rani Yarubandi <rojay@...eaurora.org>
Subject: [PATCH 1/1] tty: serial: qcom_geni_serial: Configure UART_IO_MACRO_CTRL register

Configure UART_IO_MACRO_CTRL register if UART lines are swapped.

Signed-off-by: Roja Rani Yarubandi <rojay@...eaurora.org>
---
 drivers/tty/serial/qcom_geni_serial.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index ff63728a95f4..68b11b6ad3be 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -24,6 +24,7 @@
 
 /* UART specific GENI registers */
 #define SE_UART_LOOPBACK_CFG		0x22c
+#define SE_UART_IO_MACRO_CTRL           0x240
 #define SE_UART_TX_TRANS_CFG		0x25c
 #define SE_UART_TX_WORD_LEN		0x268
 #define SE_UART_TX_STOP_BIT_LEN		0x26c
@@ -1260,6 +1261,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 	int irq;
 	bool console = false;
 	struct uart_driver *drv;
+	u32 val;
 
 	if (of_device_is_compatible(pdev->dev.of_node, "qcom,geni-debug-uart"))
 		console = true;
@@ -1309,6 +1311,10 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 		return irq;
 	uport->irq = irq;
 
+	ret = of_property_read_u32(pdev->dev.of_node, "qcom,pin_inverse", &val);
+	if (!ret)
+		writel(val, uport->membase + SE_UART_IO_MACRO_CTRL);
+
 	irq_set_status_flags(uport->irq, IRQ_NOAUTOEN);
 	ret = devm_request_irq(uport->dev, uport->irq, qcom_geni_serial_isr,
 			IRQF_TRIGGER_HIGH, port->name, uport);
-- 
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