diff options
| author | Andrew Jackson <Andrew.Jackson@arm.com> | 2014-11-07 15:14:23 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-07 17:35:56 +0100 |
| commit | 98267d33e2da8cd386212856a22f4a64b32834ab (patch) | |
| tree | b38b5fc5c105436b7bd9fb5a2ff65aa6c8ec747f /drivers/tty/serial/amba-pl011.c | |
| parent | serial: pl011: Don't enable RX DMA if residue processing not supported (diff) | |
| download | linux-98267d33e2da8cd386212856a22f4a64b32834ab.tar.xz linux-98267d33e2da8cd386212856a22f4a64b32834ab.zip | |
serial: pl011: Add device tree support for RX DMA polling
Add equivalent attributes to those provided in the platform data
for use when RX DMA is enabled.
Signed-off-by: Andrew Jackson <Andrew.Jackson@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/amba-pl011.c')
| -rw-r--r-- | drivers/tty/serial/amba-pl011.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index d984a97043b3..8d94c194f090 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -341,6 +341,7 @@ static void pl011_dma_probe_initcall(struct device *dev, struct uart_amba_port * dmaengine_slave_config(chan, &rx_conf); uap->dmarx.chan = chan; + uap->dmarx.auto_poll_rate = false; if (plat && plat->dma_rx_poll_enable) { /* Set poll rate if specified. */ if (plat->dma_rx_poll_rate) { @@ -361,9 +362,24 @@ static void pl011_dma_probe_initcall(struct device *dev, struct uart_amba_port * plat->dma_rx_poll_timeout; else uap->dmarx.poll_timeout = 3000; - } else - uap->dmarx.auto_poll_rate = false; - + } else if (!plat && dev->of_node) { + uap->dmarx.auto_poll_rate = of_property_read_bool( + dev->of_node, "auto-poll"); + if (uap->dmarx.auto_poll_rate) { + u32 x; + + if (0 == of_property_read_u32(dev->of_node, + "poll-rate-ms", &x)) + uap->dmarx.poll_rate = x; + else + uap->dmarx.poll_rate = 100; + if (0 == of_property_read_u32(dev->of_node, + "poll-timeout-ms", &x)) + uap->dmarx.poll_timeout = x; + else + uap->dmarx.poll_timeout = 3000; + } + } dev_info(uap->port.dev, "DMA channel RX %s\n", dma_chan_name(uap->dmarx.chan)); } |