AuxXxilium/linux_dsm_epyc7002
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serial: 8250_dw: don't limit DMA support to ACPI

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It should be available for DT users as well. This does not
enable DMA by default except with ACPI. DT users can enable
DMA based on a property.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heikki Krogerus 2013-09-05 17:34:53 +03:00 committed by Greg Kroah-Hartman
parent 2797f6fb67
commit fe95855539
1 changed files with 10 additions and 10 deletions
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20
drivers/tty/serial/8250/8250_dw.c
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@ -56,11 +56,12 @@
struct dw8250_data {
int last_lcr;
int last_mcr;
int line;
struct clk *clk;
u8 usr_reg;
u8 usr_reg;
int last_lcr;
int last_mcr;
int line;
struct clk *clk;
struct uart_8250_dma dma;
};
static inline int dw8250_modify_msr(struct uart_port *p, int offset, int value)
@ -241,7 +242,8 @@ static int dw8250_probe_of(struct uart_port *p,
}
#ifdef CONFIG_ACPI
static int dw8250_probe_acpi(struct uart_8250_port *up)
static int dw8250_probe_acpi(struct uart_8250_port *up,
struct dw8250_data *data)
{
const struct acpi_device_id *id;
struct uart_port *p = &up->port;
@ -260,9 +262,7 @@ static int dw8250_probe_acpi(struct uart_8250_port *up)
if (!p->uartclk)
p->uartclk = (unsigned int)id->driver_data;
up->dma = devm_kzalloc(p->dev, sizeof(*up->dma), GFP_KERNEL);
if (!up->dma)
return -ENOMEM;
up->dma = &data->dma;
up->dma->rxconf.src_maxburst = p->fifosize / 4;
up->dma->txconf.dst_maxburst = p->fifosize / 4;
@ -324,7 +324,7 @@ static int dw8250_probe(struct platform_device *pdev)
if (err)
return err;
} else if (ACPI_HANDLE(&pdev->dev)) {
err = dw8250_probe_acpi(&uart);
err = dw8250_probe_acpi(&uart, data);
if (err)
return err;
} else {