Use ePAPR defined properties for x86-uart: clock-frequency and
current-speed. Assign the value of clock-frequency in device tree
to plat->clock of x86-uart instead of using hardcoded number.
Signed-off-by: Bin Meng <bmeng...@gmail.com>
Acked-by: Simon Glass <s...@chromium.org>
---
Changes in v4: None
Changes in v3: None
Changes in v2:
- New patch to use ePAPR defined properties for x86-uart
arch/x86/dts/serial.dtsi | 5 ++---
drivers/serial/serial_x86.c | 8 +++++++-
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/arch/x86/dts/serial.dtsi b/arch/x86/dts/serial.dtsi
index ebdda76..9b097f4 100644
--- a/arch/x86/dts/serial.dtsi
+++ b/arch/x86/dts/serial.dtsi
@@ -3,8 +3,7 @@
compatible = "x86-uart";
reg = <0x3f8 8>;
reg-shift = <0>;
- io-mapped = <1>;
- multiplier = <1>;
- baudrate = <115200>;
+ clock-frequency = <1843200>;
+ current-speed = <115200>;
};
};
diff --git a/drivers/serial/serial_x86.c b/drivers/serial/serial_x86.c
index e81e035..4bf6062 100644
--- a/drivers/serial/serial_x86.c
+++ b/drivers/serial/serial_x86.c
@@ -6,9 +6,12 @@
#include <common.h>
#include <dm.h>
+#include <fdtdec.h>
#include <ns16550.h>
#include <serial.h>
+DECLARE_GLOBAL_DATA_PTR;
+
static const struct udevice_id x86_serial_ids[] = {
{ .compatible = "x86-uart" },
{ }
@@ -22,10 +25,13 @@ static int x86_serial_ofdata_to_platdata(struct udevice
*dev)
ret = ns16550_serial_ofdata_to_platdata(dev);
if (ret)
return ret;
- plat->clock = 1843200;
+
+ plat->clock = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+ "clock-frequency", 1843200);
return 0;
}
+
U_BOOT_DRIVER(serial_ns16550) = {
.name = "serial_x86",
.id = UCLASS_SERIAL,
--
1.8.2.1
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