[PATCH 5/6] tty: serial: lpuart: add earlycon support for imx7ulp
From: aisheng.dong@nxp.com (Dong Aisheng)
Date: 2017-05-09 07:52:08
Also in:
linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
earlycon is executed quite early before the device tree probe, so we need configure the correct reg_off for imx7ulp during early console setup. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <redacted> Cc: Fugang Duan <redacted> Cc: Stefan Agner <stefan@agner.ch> Cc: Mingkai Hu <Mingkai.Hu@nxp.com> Cc: Yangbo Lu <yangbo.lu@nxp.com> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> --- drivers/tty/serial/fsl_lpuart.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 1cdb3f9..5b485e8 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c@@ -1978,8 +1978,20 @@ 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; + + lpuart_reg_off = 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);
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2.7.4