I am using RCN's image-builder to build jessie images for the BBB (was
previously using Wheezy). So far so good, I now need to create a custom
dtb to enable ttyO1,ttyO2,ttyO4 and ttyO5. I cloned RCN's dtb-rebuilder
and created a .dts with the following contents:
/dts-v1/;
#include "am33xx.dtsi"
#include "am335x-bone-common.dtsi"
#include "am335x-bone-common-pinmux.dtsi"
/ {
model = "TI AM335x BeagleBone Black";
compatible = "ti,am335x-bone-black", "ti,am335x-bone", "ti,am33xx";
};
&ldo3_reg {
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
};
&ocp {
/* clkout2 */
P9_41_pinmux {
status = "disabled";
};
/* mmc1 */
P9_92_pinmux {
status = "disabled";
};
};
&mmc1 {
vmmc-supply = <&vmmcsd_fixed>;
};
&am33xx_pinmux {
pinctrl-names = "default";
pinctrl-0 = <&clkout2_pin>;
};
#include "am335x-boneblack-emmc.dtsi"
#include "am335x-bone-i2c2-cape-eeprom.dtsi"
#include "am335x-bone-ttyO1.dtsi"
#include "am335x-bone-ttyO2.dtsi"
#include "am335x-bone-ttyO4.dtsi"
#include "am335x-bone-ttyO5.dtsi"
However, it seems that while ttyO1, ttyO2 and ttyO4 appear (although the
device numbering is off as I see ttyO0-ttyO3 in /dev), I'm not seeing ttyO5
appear. dmesg shows:
[ 2.613986] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[ 2.616773] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 88,
base_baud = 3000000) is a 8250
[ 2.634561] console [ttyS0] enabled
[ 2.635559] 48022000.serial: ttyS1 at MMIO 0x48022000 (irq = 89,
base_baud = 3000000) is a 8250
[ 2.636413] 48024000.serial: ttyS2 at MMIO 0x48024000 (irq = 90,
base_baud = 3000000) is a 8250
[ 2.637193] 481a8000.serial: ttyS3 at MMIO 0x481a8000 (irq = 61,
base_baud = 3000000) is a 8250
[ 2.637737] omap8250 481aa000.serial: unable to register 8250 port
[ 2.644177] omap8250: probe of 481aa000.serial failed with error -28
So it looks like the old "HDMI needs to be disabled" error, except that
with there's no capemgr in 3.14 loading BB-HDMI and I'm NOT including any
of the am335x-*hdmi* .dts[i] files. I *think* this should work as is. Not
sure what error -28 is (28 is ENOSPC in errno.h?).
Any ideas on why ttyO5 is not coming up?
Thanks!
-W
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