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sunxi: Set the /chosen/stdout-path fdt property for sunxi boards

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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 <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Tom Rini <trini@ti.com>
This commit is contained in:
Hans de Goede 2015-02-20 16:55:12 +01:00
parent f388a26d11
commit f3133962f4
1 changed files with 14 additions and 0 deletions
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14
include/configs/sunxi-common.h
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@ -210,6 +210,20 @@ 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