[U-Boot] [PATCH 02/13] serial: 16550: Add port type as driver data

Marek Vasut
2016-12-01T01:06:30Z

Add driver data to each compatible string to identify the type of
the port. Since all the ports in the driver are entirely compatible
with 16550 for now, all are marked with PORT_NS16550. But, there
are ports which have specific quirks, like the JZ4780 UART, which
do not have any DT property to denote the quirks. Instead, Linux
uses the compatible string to discern such ports and enable the
necessary quirks.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
---
drivers/serial/ns16550.c | 26 ++++++++++++++++----------
1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 3c9f3b0..3130a1d 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -360,6 +360,12 @@ int ns16550_serial_probe(struct udevice *dev)
return 0;
}

+#if CONFIG_IS_ENABLED(OF_CONTROL)
+enum {
+ PORT_NS16550 = 0,
+};
+#endif
+
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
int ns16550_serial_ofdata_to_platdata(struct udevice *dev)
{
@@ -453,16 +459,16 @@ const struct dm_serial_ops ns16550_serial_ops = {
* compatible string to your dts.
*/
static const struct udevice_id ns16550_serial_ids[] = {
- { .compatible = "ns16550" },
- { .compatible = "ns16550a" },
- { .compatible = "nvidia,tegra20-uart" },
- { .compatible = "snps,dw-apb-uart" },
- { .compatible = "ti,omap2-uart" },
- { .compatible = "ti,omap3-uart" },
- { .compatible = "ti,omap4-uart" },
- { .compatible = "ti,am3352-uart" },
- { .compatible = "ti,am4372-uart" },
- { .compatible = "ti,dra742-uart" },
+ { .compatible = "ns16550", .data = PORT_NS16550 },
+ { .compatible = "ns16550a", .data = PORT_NS16550 },
+ { .compatible = "nvidia,tegra20-uart", .data = PORT_NS16550 },
+ { .compatible = "snps,dw-apb-uart", .data = PORT_NS16550 },
+ { .compatible = "ti,omap2-uart", .data = PORT_NS16550 },
+ { .compatible = "ti,omap3-uart", .data = PORT_NS16550 },
+ { .compatible = "ti,omap4-uart", .data = PORT_NS16550 },
+ { .compatible = "ti,am3352-uart", .data = PORT_NS16550 },
+ { .compatible = "ti,am4372-uart", .data = PORT_NS16550 },
+ { .compatible = "ti,dra742-uart", .data = PORT_NS16550 },
{}
};
#endif
--
2.10.2