msm_serial: Add support for non-GSBI UARTDM devices

Not all UARTDM hardware is part of a GSBI complex. Add support
for these devices and fix a bug where we assumed uartdm meant the
hardware was part of a GSBI complex.

Cc: David Brown <davidb@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index 67894354dc2a..5a7503986d7d 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -678,7 +678,7 @@ static void msm_config_port(struct uart_port *port, int flags)
                 if (ret)
                         return;
         }
-        if (msm_port->is_uartdm)
+        if (msm_port->gsbi_base)
                 writel_relaxed(GSBI_PROTOCOL_UART,
                                 msm_port->gsbi_base + GSBI_CONTROL);
 }
@@ -868,6 +868,11 @@ static struct uart_driver msm_uart_driver = {
 
 static atomic_t msm_uart_next_id = ATOMIC_INIT(0);
 
+static const struct of_device_id msm_uartdm_table[] = {
+        { .compatible = "qcom,msm-uartdm" },
+        { }
+};
+
 static int __init msm_serial_probe(struct platform_device *pdev)
 {
         struct msm_port *msm_port;
@@ -887,7 +892,7 @@ static int __init msm_serial_probe(struct platform_device *pdev)
         port->dev = &pdev->dev;
         msm_port = UART_TO_MSM(port);
 
-        if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
+        if (of_match_device(msm_uartdm_table, &pdev->dev))
                 msm_port->is_uartdm = 1;
         else
                 msm_port->is_uartdm = 0;
@@ -934,6 +939,7 @@ static int msm_serial_remove(struct platform_device *pdev)
 
 static struct of_device_id msm_match_table[] = {
         { .compatible = "qcom,msm-uart" },
+        { .compatible = "qcom,msm-uartdm" },
         {}
 };