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| author | Ley Foon Tan <ley.foon.tan@intel.com> | 2018-06-14 18:45:22 +0800 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-07-09 15:28:28 -0400 |
| commit | b051eecbda1567f6795c7d127a68dd55573d8fa0 (patch) | |
| tree | 75e08e8bc271246d5d0b8e418fb36eab83782aa4 /drivers/serial/ns16550.c | |
| parent | 2d4d6937720ba4cb4c8593b802d06ccb716a2002 (diff) | |
| download | u-boot-b051eecbda1567f6795c7d127a68dd55573d8fa0.zip u-boot-b051eecbda1567f6795c7d127a68dd55573d8fa0.tar.gz u-boot-b051eecbda1567f6795c7d127a68dd55573d8fa0.tar.bz2 | |
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 <ley.foon.tan@intel.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/serial/ns16550.c')
| -rw-r--r-- | drivers/serial/ns16550.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 53550bf..9c80090 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -9,6 +9,7 @@ #include <dm.h> #include <errno.h> #include <ns16550.h> +#include <reset.h> #include <serial.h> #include <watchdog.h> #include <linux/types.h> @@ -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); |