From cd0fa5bff8052b19bde6967c2734f323c9848568 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Sun, 13 Mar 2016 18:16:54 -0700 Subject: serial: pl01x: Add support for devices with the rate pre-configured. For Raspberry Pi, we had the input clock rate to the pl011 fixed in the rpi.c file, but it may be changed by firmware due to user changes to config.txt. Since the firmware always sets up the uart (default 115200 output unless the user changes it), we can just skip our own uart init to simplify the boot process and more reliably get serial output. Signed-off-by: Eric Anholt Reviewed-by: Tom Rini Tested-by: Stephen Warren --- drivers/serial/serial_pl01x.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'drivers/serial') diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c index 552c945264..6f83835fa8 100644 --- a/drivers/serial/serial_pl01x.c +++ b/drivers/serial/serial_pl01x.c @@ -284,7 +284,10 @@ static int pl01x_serial_setbrg(struct udevice *dev, int baudrate) struct pl01x_serial_platdata *plat = dev_get_platdata(dev); struct pl01x_priv *priv = dev_get_priv(dev); - pl01x_generic_setbrg(priv->regs, priv->type, plat->clock, baudrate); + if (!plat->skip_init) { + pl01x_generic_setbrg(priv->regs, priv->type, plat->clock, + baudrate); + } return 0; } @@ -296,7 +299,10 @@ static int pl01x_serial_probe(struct udevice *dev) priv->regs = (struct pl01x_regs *)plat->base; priv->type = plat->type; - return pl01x_generic_serial_init(priv->regs, priv->type); + if (!plat->skip_init) + return pl01x_generic_serial_init(priv->regs, priv->type); + else + return 0; } static int pl01x_serial_getc(struct udevice *dev) -- cgit v1.2.1