This patch adds device tree support for the bcm283x mini-uart driver.
Signed-off-by: Fabian Vogt <fv...@suse.com>
---
.../serial/bcm2835-aux-uart.txt | 10 ++++++++
drivers/serial/serial_bcm283x_mu.c | 28 ++++++++++++++++++++++
2 files changed, 38 insertions(+)
create mode 100644 doc/device-tree-bindings/serial/bcm2835-aux-uart.txt
diff --git a/doc/device-tree-bindings/serial/bcm2835-aux-uart.txt
b/doc/device-tree-bindings/serial/bcm2835-aux-uart.txt
new file mode 100644
index 0000000..75886e5
--- /dev/null
+++ b/doc/device-tree-bindings/serial/bcm2835-aux-uart.txt
@@ -0,0 +1,10 @@
+* BCM283x mini UART
+
+Required properties:
+- compatible: must be "brcm,bcm2835-aux-uart"
+- reg: exactly one register range with length 0x1000
+- clock: input clock frequency for the UART (used to calculate the baud
+ rate divisor)
+
+Optional properties:
+- skip-init: if present, the baud rate divisor is not changed
diff --git a/drivers/serial/serial_bcm283x_mu.c
b/drivers/serial/serial_bcm283x_mu.c
index f4e062f..e361909 100644
--- a/drivers/serial/serial_bcm283x_mu.c
+++ b/drivers/serial/serial_bcm283x_mu.c
@@ -25,6 +25,8 @@
#include <linux/compiler.h>
#include <fdtdec.h>
+DECLARE_GLOBAL_DATA_PTR;
+
struct bcm283x_mu_regs {
u32 io;
u32 iir;
@@ -132,9 +134,35 @@ static const struct dm_serial_ops bcm283x_mu_serial_ops = {
.setbrg = bcm283x_mu_serial_setbrg,
};
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static const struct udevice_id bcm283x_mu_serial_id[] = {
+ {.compatible = "brcm,bcm2835-aux-uart"},
+ {}
+};
+
+static int bcm283x_mu_serial_ofdata_to_platdata(struct udevice *dev)
+{
+ struct bcm283x_mu_serial_platdata *plat = dev_get_platdata(dev);
+ fdt_addr_t addr;
+
+ addr = dev_get_addr(dev);
+ if (addr == FDT_ADDR_T_NONE)
+ return -EINVAL;
+
+ plat->base = addr;
+ plat->clock = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "clock", 1);
+ plat->skip_init = fdtdec_get_bool(gd->fdt_blob, dev->of_offset,
+ "skip-init");
+ plat->disabled = false;
+ return 0;
+}
+#endif
+
U_BOOT_DRIVER(serial_bcm283x_mu) = {
.name = "serial_bcm283x_mu",
.id = UCLASS_SERIAL,
+ .of_match = of_match_ptr(bcm283x_mu_serial_id),
+ .ofdata_to_platdata =
of_match_ptr(bcm283x_mu_serial_ofdata_to_platdata),
.platdata_auto_alloc_size = sizeof(struct bcm283x_mu_serial_platdata),
.probe = bcm283x_mu_serial_probe,
.ops = &bcm283x_mu_serial_ops,
--
2.6.2
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
