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tty: serial: lpuart: add earlycon support for imx7ulp 

earlycon is executed quite early before the device tree probe,
so we need correctly initialize the port membase and iotype for
imx7ulp during early console setup before using.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Mingkai Hu <Mingkai.Hu@nxp.com>
Cc: Yangbo Lu <yangbo.lu@nxp.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dong Aisheng 2017-06-13 10:55:53 +08:00 committed by Greg Kroah-Hartman
parent 24b1e5f0e8
commit 97d6f353da
1 changed files with 13 additions and 0 deletions
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13
drivers/tty/serial/fsl_lpuart.c
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@ -1982,8 +1982,21 @@ static int __init lpuart32_early_console_setup(struct earlycon_device *device,
return 0;
}
static int __init lpuart32_imx_early_console_setup(struct earlycon_device *device,
const char *opt)
{
if (!device->port.membase)
return -ENODEV;
device->port.iotype = UPIO_MEM32;
device->port.membase += IMX_REG_OFF;
device->con->write = lpuart32_early_write;
return 0;
}
OF_EARLYCON_DECLARE(lpuart, "fsl,vf610-lpuart", lpuart_early_console_setup);
OF_EARLYCON_DECLARE(lpuart32, "fsl,ls1021a-lpuart", lpuart32_early_console_setup);
OF_EARLYCON_DECLARE(lpuart32, "fsl,imx7ulp-lpuart", lpuart32_imx_early_console_setup);
EARLYCON_DECLARE(lpuart, lpuart_early_console_setup);
EARLYCON_DECLARE(lpuart32, lpuart32_early_console_setup);