diff options
| author | Antony Pavlov <antonynpavlov@gmail.com> | 2013-07-23 19:28:01 +0400 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-07-24 18:53:47 +0200 |
| commit | fe290ec08fb2195bb1d10035c7f07a8017c36f9d (patch) | |
| tree | 4a17fc614f88e15b5c268ec2301af07c588431aa /drivers/serial/serial_ns16550.c | |
| parent | c841e7a26211459718552353d3aecdf2db686682 (diff) | |
| download | barebox-fe290ec08fb2195bb1d10035c7f07a8017c36f9d.tar.gz barebox-fe290ec08fb2195bb1d10035c7f07a8017c36f9d.tar.xz | |
serial: ns16550: get clock-frequency from dt
This patch helps clk-less boards to use device
tree for clock frequency probing (taken from
linux.git/drivers/tty/serial/of_serial.c).
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/serial/serial_ns16550.c')
| -rw-r--r-- | drivers/serial/serial_ns16550.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/serial/serial_ns16550.c b/drivers/serial/serial_ns16550.c index ad3125ac04..6a3c865b3f 100644 --- a/drivers/serial/serial_ns16550.c +++ b/drivers/serial/serial_ns16550.c @@ -277,6 +277,12 @@ static int ns16550_probe(struct device_d *dev) priv->plat.clock = clk_get_rate(priv->clk); } + if (priv->plat.clock == 0 && IS_ENABLED(CONFIG_OFDEVICE)) { + struct device_node *np = dev->device_node; + + of_property_read_u32(np, "clock-frequency", &priv->plat.clock); + } + if (priv->plat.clock == 0) { dev_err(dev, "no valid clockrate\n"); ret = -EINVAL; |