- return 0;
-}
-
-static bool dw8250_idma_filter(struct dma_chan *chan, void *param)
-{
- struct device *dev = param;
-
- if (dev != chan->device->dev->parent)
- return false;
-
- return true;
-}
-
-static int dw8250_probe_acpi(struct uart_8250_port *up,
- struct dw8250_data *data)
-{
- struct uart_port *p = &up->port;
-
- dw8250_setup_port(up);
-
- p->iotype = UPIO_MEM32;
- p->serial_in = dw8250_serial_in32;
- p->serial_out = dw8250_serial_out32;
- p->regshift = 2;
-
- /* Platforms with iDMA */
- if (platform_get_resource_byname(to_platform_device(up->port.dev),
- IORESOURCE_MEM, "lpss_priv")) {
- data->dma.rx_param = up->port.dev->parent;
- data->dma.tx_param = up->port.dev->parent;
- data->dma.fn = dw8250_idma_filter;
- }
-
- up->dma = &data->dma;
- up->dma->rxconf.src_maxburst = p->fifosize / 4;
- up->dma->txconf.dst_maxburst = p->fifosize / 4;
-
- up->port.set_termios = dw8250_set_termios;
-
- return 0;
-}
-
-static int dw8250_probe(struct platform_device *pdev)
-{
- struct uart_8250_port uart = {};
- struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- int irq = platform_get_irq(pdev, 0);
- struct dw8250_data *data;
- int err;
-
- if (!regs) {
- dev_err(&pdev->dev, "no registers defined\n");
- return -EINVAL;
- }
-
- if (irq < 0) {
- if (irq != -EPROBE_DEFER)
- dev_err(&pdev->dev, "cannot get irq\n");
- return irq;
- }
-
- spin_lock_init(&uart.port.lock);
- uart.port.mapbase = regs->start;
- uart.port.irq = irq;
- uart.port.handle_irq = dw8250_handle_irq;
- uart.port.pm = dw8250_do_pm;
- uart.port.type = PORT_8250;
- uart.port.flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
- uart.port.dev = &pdev->dev;
-
- uart.port.membase = devm_ioremap(&pdev->dev, regs->start,
- resource_size(regs));
- if (!uart.port.membase)
- return -ENOMEM;
-
- data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- data->usr_reg = DW_UART_USR;
-