[PATCH v3 5/5] tty/serial: Add Spreadtrum sc9836-uart driver support

Lyra Zhang
2014-11-27T11:59:46Z

2014-11-27 2:29 GMT+08:00 Murali Karicheri <m-karicheri2@ti.com>:
> On 11/25/2014 07:16 AM, Chunyan Zhang wrote:
>>
>> Add a full sc9836-uart driver for SC9836 SoC which is based on the

>> +#include<linux/clk.h>
>
> How about sorting this includes? asm/irq.h go first followed linux/ in
> alphabatical order?

>> +static irqreturn_t sprd_handle_irq(int irq, void *dev_id)
>> +{
>> + struct uart_port *port = (struct uart_port *)dev_id;
>> + u32 ims;
>> +
>> + ims = serial_in(port, SPRD_IMSR);
>> +
>> + serial_out(port, SPRD_ICLR, ~0);
>> +
>> + if (ims& (SPRD_IMSR_RX_FIFO_FULL |
>> + SPRD_IMSR_BREAK_DETECT | SPRD_IMSR_TIMEOUT)) {
>> + sprd_rx(irq, port);
>> + }
>> + if (ims& SPRD_IMSR_TX_FIFO_EMPTY)
>> + sprd_tx(irq, port);
>> +
>> + return IRQ_HANDLED;
>
> You are always returning IRQ_HANDLED and this is registered as a SHARED irq.
> Is there a chance this handler is called and the irq event doesn't
> belong to this device?
>
> Murali

You are right, this is not a SHARED irq. I'll pass 0 for irqflags when
called 'devm_request_irq' in the next version patch.

Thank you,
Chunyan