From e2860e1f62f2e87d268403a749ba1f19663ef19f Mon Sep 17 00:00:00 2001 From: Joel Stanley Date: Mon, 29 May 2017 19:27:52 +0930 Subject: serial: 8250_of: Add reset support This adds the hooks for an optional reset controller in the 8250 device tree node. Signed-off-by: Joel Stanley Reviewed-by: Philipp Zabel Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_of.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c index 1cbadafc6889..0cf95fddccfc 100644 --- a/drivers/tty/serial/8250/8250_of.c +++ b/drivers/tty/serial/8250/8250_of.c @@ -19,11 +19,13 @@ #include #include #include +#include #include "8250.h" struct of_serial_info { struct clk *clk; + struct reset_control *rst; int type; int line; }; @@ -132,6 +134,13 @@ static int of_platform_serial_setup(struct platform_device *ofdev, } } + info->rst = devm_reset_control_get_optional_shared(&ofdev->dev, NULL); + if (IS_ERR(info->rst)) + goto out; + ret = reset_control_deassert(info->rst); + if (ret) + goto out; + port->type = type; port->uartclk = clk; port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP @@ -229,6 +238,7 @@ static int of_platform_serial_remove(struct platform_device *ofdev) serial8250_unregister_port(info->line); + reset_control_assert(info->rst); if (info->clk) clk_disable_unprepare(info->clk); kfree(info); -- cgit v1.2.3