serial: 8250_early: Add earlycon for BCM2835 aux uart (57b76faf) · Commits · 戴 / test

Define the OF early console for BCM2835 aux UART, which can be enabled by passing "earlycon" on the boot command line. This UART is found on BCM283x and BCM27xx SoCs, a.k.a. Raspberry Pi in its variants. Signed-off-by:

Matthias Brugger <mbrugger@suse.com> Link: https://lore.kernel.org/r/20200126123314.3558-1-matthias.bgg@kernel.org Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_bcm2835aux.c

+18 −0

Original line number	Diff line number	Diff line
		@@ -137,6 +137,24 @@ static struct platform_driver bcm2835aux_serial_driver = {
		};
		module_platform_driver(bcm2835aux_serial_driver);

		#ifdef CONFIG_SERIAL_8250_CONSOLE

		static int __init early_bcm2835aux_setup(struct earlycon_device *device,
		const char *options)
		{
		if (!device->port.membase)
		return -ENODEV;

		device->port.iotype = UPIO_MEM32;
		device->port.regshift = 2;

		return early_serial8250_setup(device, NULL);
		}

		OF_EARLYCON_DECLARE(bcm2835aux, "brcm,bcm2835-aux-uart",
		early_bcm2835aux_setup);
		#endif

		MODULE_DESCRIPTION("BCM2835 auxiliar UART driver");
		MODULE_AUTHOR("Martin Sperl <kernel@martin.sperl.org>");
		MODULE_LICENSE("GPL v2");

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