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author | Wadim Egorov <w.egorov@phytec.de> | 2017-02-09 10:36:42 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2017-02-10 13:19:40 +0100 |
commit | 49b321fb89bc3310ae902af4ca47b66747a41145 (patch) | |
tree | dac3c95122874bd1ea2e4bb2bfcedc489db123b4 /drivers | |
parent | 14c6fc99e1a338fc3804a1e858a60e8b32d4dd0a (diff) | |
download | barebox-49b321fb89bc3310ae902af4ca47b66747a41145.tar.gz barebox-49b321fb89bc3310ae902af4ca47b66747a41145.tar.xz |
serial: ns16550: Set read/write functions depending on reg-io-width
Set proper register read/write functions depending on reg-io-width
device tree property.
Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/serial/serial_ns16550.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/serial/serial_ns16550.c b/drivers/serial/serial_ns16550.c index c6548e3b85..439b7d5517 100644 --- a/drivers/serial/serial_ns16550.c +++ b/drivers/serial/serial_ns16550.c @@ -287,12 +287,31 @@ 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; 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: + 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 = { |