From b051eecbda1567f6795c7d127a68dd55573d8fa0 Mon Sep 17 00:00:00 2001 From: Ley Foon Tan Date: Thu, 14 Jun 2018 18:45:22 +0800 Subject: [PATCH] serial: ns16550: Add reset ctrl to driver Add code to reset all reset signals as in serial DT node. A reset property is an optional feature, so do not fail if a reset property is not present. If a reset property is discovered, then use it to deassert, thus bringing the IP out of reset. Signed-off-by: Ley Foon Tan Reviewed-by: Marek Vasut Reviewed-by: Simon Glass --- drivers/serial/ns16550.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 53550bfa888..9c80090aa72 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -177,6 +178,7 @@ void NS16550_init(NS16550_t com_port, int baud_divisor) #if defined(CONFIG_ARCH_OMAP2PLUS) serial_out(0x7, &com_port->mdr1); /* mode select reset TL16C750*/ #endif + serial_out(UART_MCRVAL, &com_port->mcr); serial_out(ns16550_getfcr(com_port), &com_port->fcr); if (baud_divisor != -1) @@ -370,6 +372,12 @@ static int ns16550_serial_setbrg(struct udevice *dev, int baudrate) int ns16550_serial_probe(struct udevice *dev) { struct NS16550 *const com_port = dev_get_priv(dev); + struct reset_ctl_bulk reset_bulk; + int ret; + + ret = reset_get_bulk(dev, &reset_bulk); + if (!ret) + reset_deassert_bulk(&reset_bulk); com_port->plat = dev_get_platdata(dev); NS16550_init(com_port, -1);