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![]() ttyO2 console enables legacy CONFIG_SERIAL_OMAP driver in kernel. Nowadays it's preferred to use the generic CONFIG_SERIAL_8250_OMAP driver, which being enabled via ttyS2 console. Both drivers are enabled in multi_v7_defconfig and in omap2plus_defconfig, for compatibility reasons. Let's switch to ttyS2 console, to be sure that standard 8250 serial driver is used. Similar behavior can be also achieved by enabling CONFIG_SERIAL_8250_OMAP_TTYO_FIXUP option in kernel, but it's better not to rely on that, as it can be disabled or removed after transitional period. Right now on DRA7/AM57x platforms the 8250-omap driver is being probed first, and omap-serial driver is only probed if the first one failed. It can be seen from uart3 definition in arch/arm/boot/dts/dra7-l4.dtsi: compatible = "ti,dra742-uart", "ti,omap4-uart"; So the kernel already uses 8250 driver. This change basically allows kernel developers to throw away the omap-serial driver and associated compatibility options. Similar discussions [1,2] have started several years ago, so it should be safe to do that now. [1] https://patchwork.kernel.org/patch/6198471/ [2] http://processors.wiki.ti.com/index.php/Sitara_Linux_UART_-_Switching_to_8250_Driver Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Andrew F. Davis <afd@ti.com> [trini: Update omap5_uevm] Signed-off-by: Tom Rini <trini@konsulko.com> |
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boot.h | ||
dfu.h | ||
mmc.h | ||
nand.h | ||
spi.h |