On Fri, Feb 20, 2015 at 04:59:09PM +0100, Hans de Goede wrote: > While discussing with some people how to get the Linux kernel to do the > right thing wrt sending output to both the serial console and the > hdmi out / lcd screen when booting on ARM devices, Grant Likely pointed out > that there already is a solution for this. > > All we need to do is set the /chosen/stdout-path fdt property, and if no > console= arguments were specified on the kernel commandline the kernel > will honor this and add this device as a console (next to the primary > video output on hdmi). > > And u-boot already has support for setting this, all we need to do is > define OF_STDOUT_PATH and then everything will just work ootb, without > people needing to meddle with adding console= arguments in extlinux.conf . > > Signed-off-by: Hans de Goede <[email protected]> > --- > include/configs/sunxi-common.h | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h > index 20e11cf..cd02baf 100644 > --- a/include/configs/sunxi-common.h > +++ b/include/configs/sunxi-common.h > @@ -263,6 +263,20 @@ extern int soft_i2c_gpio_scl; > #define CONFIG_CONS_INDEX 1 /* UART0 */ > #endif > > +#if CONFIG_CONS_INDEX == 1 > +#ifdef CONFIG_MACH_SUN9I > +#define OF_STDOUT_PATH "/soc/serial@07000000:115200" > +#else > +#define OF_STDOUT_PATH "/soc@01c00000/serial@01c28000:115200" > +#endif > +#elif CONFIG_CONS_INDEX == 2 && defined(CONFIG_MACH_SUN5I) > +#define OF_STDOUT_PATH "/soc@01c00000/serial@01c28400:115200" > +#elif CONFIG_CONS_INDEX == 5 && defined(CONFIG_MACH_SUN8I) > +#define OF_STDOUT_PATH "/soc@01c00000/serial@01f02800:115200" > +#else > +#error Unsupported console port nr. Please fix stdout-path in sunxi-common.h. > +#endif > + > /* GPIO */ > #define CONFIG_SUNXI_GPIO > #define CONFIG_SPL_GPIO_SUPPORT
Long term we need to make this not be a hard-coded define perhaps? But for today, Reviewed-by: Tom Rini <[email protected]> -- Tom
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