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| author | Rouven Czerwinski <r.czerwinski@pengutronix.de> | 2019-01-15 06:44:04 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-02-05 12:39:09 +0100 |
| commit | de698980f33e6f4f457e38a0b77494de4752feae (patch) | |
| tree | 408d923c6ff26e1a7f7a64b941577c2ce08ca09c /drivers | |
| parent | 9c3fe58fd962651bcab98b7d6f919a3e11e0dc3f (diff) | |
| download | barebox-de698980f33e6f4f457e38a0b77494de4752feae.tar.gz barebox-de698980f33e6f4f457e38a0b77494de4752feae.tar.xz | |
serial_ns16550: handle default reg-io-width
According to the device tree bindings for 8250, width is an optional property.
Default to 1 which is the same default value as used by the kernel.
Before this change the driver would not work for device trees which do not
include the optional binding.
Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/serial/serial_ns16550.c | 46 |
1 files changed, 23 insertions, 23 deletions
diff --git a/drivers/serial/serial_ns16550.c b/drivers/serial/serial_ns16550.c index 4d73ea8b87..8ddcfdbefc 100644 --- a/drivers/serial/serial_ns16550.c +++ b/drivers/serial/serial_ns16550.c @@ -297,36 +297,36 @@ static int ns16550_tstc(struct console_device *cdev) static void ns16550_probe_dt(struct device_d *dev, struct ns16550_priv *priv) { struct device_node *np = dev->device_node; - u32 width; + u32 width = 1; if (!IS_ENABLED(CONFIG_OFDEVICE)) return; of_property_read_u32(np, "clock-frequency", &priv->plat.clock); of_property_read_u32(np, "reg-shift", &priv->plat.shift); - if (!of_property_read_u32(np, "reg-io-width", &width)) - switch (width) { - case 1: - priv->read_reg = ns16550_read_reg_mmio_8; - priv->write_reg = ns16550_write_reg_mmio_8; - break; - case 2: - priv->read_reg = ns16550_read_reg_mmio_16; - priv->write_reg = ns16550_write_reg_mmio_16; - break; - case 4: - if (of_device_is_big_endian(np)) { - priv->read_reg = ns16550_read_reg_mmio_32be; - priv->write_reg = ns16550_write_reg_mmio_32be; - } else { - priv->read_reg = ns16550_read_reg_mmio_32; - priv->write_reg = ns16550_write_reg_mmio_32; - } - break; - default: - dev_err(dev, "unsupported reg-io-width (%d)\n", - width); + of_property_read_u32(np, "reg-io-width", &width); + switch (width) { + case 1: + priv->read_reg = ns16550_read_reg_mmio_8; + priv->write_reg = ns16550_write_reg_mmio_8; + break; + case 2: + priv->read_reg = ns16550_read_reg_mmio_16; + priv->write_reg = ns16550_write_reg_mmio_16; + break; + case 4: + if (of_device_is_big_endian(np)) { + priv->read_reg = ns16550_read_reg_mmio_32be; + priv->write_reg = ns16550_write_reg_mmio_32be; + } else { + priv->read_reg = ns16550_read_reg_mmio_32; + priv->write_reg = ns16550_write_reg_mmio_32; } + break; + default: + dev_err(dev, "unsupported reg-io-width (%d)\n", + width); + } } static struct ns16550_drvdata ns16450_drvdata = { |