On Wed, Mar 16, 2011 at 11:51:40PM +0800, Jason Liu wrote:
Signed-off-by: Jeremy Kerr jeremy.kerr@canonical.com Signed-off-by: Jason Liu jason.hui@linaro.org
.../bindings/tty/serial/fsl-imx-uart.txt | 19 +++++ drivers/tty/serial/imx.c | 78 +++++++++++++++++--- 2 files changed, 87 insertions(+), 10 deletions(-)
diff --git a/Documentation/devicetree/bindings/tty/serial/fsl-imx-uart.txt b/Documentation/devicetree/bindings/tty/serial/fsl-imx-uart.txt new file mode 100644 index 0000000..b7ece32 --- /dev/null +++ b/Documentation/devicetree/bindings/tty/serial/fsl-imx-uart.txt @@ -0,0 +1,19 @@ +* UART (Universal Asynchronous Receiver/Transmitter)
+Required properties: +- compatible : "fsl,imx51-uart". +- reg : Offset and length of the register set for the device. +- interrupts : should contain uart interrupt. +- fsl,has-rts-cts : indicate it has rts-cts. +- uart-clock : the uart clock input information.
+Example:
+imx-uart@bc000 {
- compatible = "fsl,imx51-uart";
- reg = <0xbc000 0x1000>;
- interrupts = <0x1f>;
- fsl,has-rts-cts;
- uart-clock = <&uart0_clk>, "uart";
+};
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index dfcf4b1..568550d 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -47,6 +47,8 @@ #include <linux/delay.h> #include <linux/rational.h> #include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_address.h> #include <asm/io.h> #include <asm/irq.h> @@ -1224,6 +1226,53 @@ static int serial_imx_resume(struct platform_device *dev) return 0; } +#ifdef CONFIG_OF +static int serial_imx_probe_dt(struct imx_port *sport,
struct platform_device *pdev)+{
- struct device_node *node = pdev->dev.of_node;
- static int line;
- if (!node)
return -ENODEV;- if (of_get_property(node, "fsl,has-rts-cts", NULL))
sport->have_rtscts = 1;- if (of_get_property(node, "fsl,irda-mode", NULL))
sport->use_irda = 1;- sport->port.line = line++;
- return 0;
+} +#else +static int serial_imx_probe_dt(struct imx_port *sport,
struct platform_device *pdev)+{
- return -ENODEV;
+} +#endif
+static int serial_imx_probe_pdata(struct imx_port *sport,
struct platform_device *pdev)+{
- struct imxuart_platform_data *pdata = pdev->dev.platform_data;
- if (!pdata)
return 0;- if (pdata->flags & IMXUART_HAVE_RTSCTS)
sport->have_rtscts = 1;+#ifdef CONFIG_IRDA
- if (pdata->flags & IMXUART_IRDA)
sport->use_irda = 1;+#endif
- sport->port.line = pdev->id;
- return 0;
+} static int serial_imx_probe(struct platform_device *pdev) { struct imx_port *sport; @@ -1236,6 +1285,12 @@ static int serial_imx_probe(struct platform_device *pdev) if (!sport) return -ENOMEM;
- ret = serial_imx_probe_dt(sport, pdev);
- if (ret == -ENODEV)
ret = serial_imx_probe_pdata(sport, pdev);- if (ret)
goto free;- res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { ret = -ENODEV;
@@ -1260,7 +1315,6 @@ static int serial_imx_probe(struct platform_device *pdev) sport->port.fifosize = 32; sport->port.ops = &imx_pops; sport->port.flags = UPF_BOOT_AUTOCONF;
- sport->port.line = pdev->id; init_timer(&sport->timer); sport->timer.function = imx_timeout; sport->timer.data = (unsigned long)sport;
@@ -1274,17 +1328,13 @@ static int serial_imx_probe(struct platform_device *pdev) sport->port.uartclk = clk_get_rate(sport->clk);
- imx_ports[pdev->id] = sport;
- if (imx_ports[sport->port.line]) {
ret = -EBUSY;goto clkput;- }
- imx_ports[sport->port.line] = sport;
pdata = pdev->dev.platform_data;
- if (pdata && (pdata->flags & IMXUART_HAVE_RTSCTS))
sport->have_rtscts = 1;-#ifdef CONFIG_IRDA
- if (pdata && (pdata->flags & IMXUART_IRDA))
sport->use_irda = 1;-#endif
- if (pdata && pdata->init) { ret = pdata->init(pdev); if (ret)
@@ -1336,6 +1386,11 @@ static int serial_imx_remove(struct platform_device *pdev) return 0; } +static struct of_device_id imx_uart_matches[] = {
- { .compatible = "fsl,imx51-uart" },
- {},
+};
static struct platform_driver serial_imx_driver = { .probe = serial_imx_probe, .remove = serial_imx_remove, @@ -1345,6 +1400,9 @@ static struct platform_driver serial_imx_driver = { .driver = { .name = "imx-uart", .owner = THIS_MODULE, +#if defined(CONFIG_OF)
.of_match_table = imx_uart_matches,+#endif
This #if defined(CONFIG_OF) is no longer needed in my tree. I removed it when I committed this patch.
g.
}, }; -- 1.7.1