mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 11:49:32 +00:00
arm pl011 serial: support multi-irq request
In order to make pl011 work better, multiple interrupts are required, such as TXIM, RXIM, RTIM, error interrupt(FE/PE/BE/OE); at the same time, pl011 to GIC does not merge the interrupt lines(each serial-interrupt corresponding to different GIC hardware interrupt), so need to enable and request multiple gic interrupt numbers in the driver. Signed-off-by: Bing Fan <tombinfan@tencent.com> Link: https://lore.kernel.org/r/1625103512-30182-1-git-send-email-hptsfb@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
8d47923772
commit
b0819465be
1 changed files with 31 additions and 3 deletions
|
@ -1777,11 +1777,39 @@ static void pl011_write_lcr_h(struct uart_amba_port *uap, unsigned int lcr_h)
|
|||
}
|
||||
}
|
||||
|
||||
static void pl011_release_irq(struct uart_amba_port *uap, unsigned int max_cnt)
|
||||
{
|
||||
struct amba_device *amba_dev = container_of(uap->port.dev, struct amba_device, dev);
|
||||
int i;
|
||||
|
||||
for (i = 0; i < max_cnt; i++)
|
||||
if (amba_dev->irq[i])
|
||||
free_irq(amba_dev->irq[i], uap);
|
||||
}
|
||||
|
||||
static int pl011_allocate_irq(struct uart_amba_port *uap)
|
||||
{
|
||||
int ret = 0;
|
||||
int i;
|
||||
unsigned int virq;
|
||||
struct amba_device *amba_dev = container_of(uap->port.dev, struct amba_device, dev);
|
||||
|
||||
pl011_write(uap->im, uap, REG_IMSC);
|
||||
|
||||
return request_irq(uap->port.irq, pl011_int, IRQF_SHARED, "uart-pl011", uap);
|
||||
for (i = 0; i < AMBA_NR_IRQS; i++) {
|
||||
virq = amba_dev->irq[i];
|
||||
if (virq == 0)
|
||||
break;
|
||||
|
||||
ret = request_irq(virq, pl011_int, IRQF_SHARED, dev_name(&amba_dev->dev), uap);
|
||||
if (ret) {
|
||||
dev_err(uap->port.dev, "request %u interrupt failed\n", virq);
|
||||
pl011_release_irq(uap, i - 1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
|
@ -1953,7 +1981,7 @@ static void pl011_shutdown(struct uart_port *port)
|
|||
if ((port->rs485.flags & SER_RS485_ENABLED) && uap->rs485_tx_started)
|
||||
pl011_rs485_tx_stop(uap);
|
||||
|
||||
free_irq(uap->port.irq, uap);
|
||||
pl011_release_irq(uap, AMBA_NR_IRQS);
|
||||
|
||||
pl011_disable_uart(uap);
|
||||
|
||||
|
@ -1983,7 +2011,7 @@ static void sbsa_uart_shutdown(struct uart_port *port)
|
|||
|
||||
pl011_disable_interrupts(uap);
|
||||
|
||||
free_irq(uap->port.irq, uap);
|
||||
pl011_release_irq(uap, AMBA_NR_IRQS);
|
||||
|
||||
if (uap->port.ops->flush_buffer)
|
||||
uap->port.ops->flush_buffer(port);
|
||||
|
|
Loading…
Reference in a new issue