From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Bryan O'Donoghue <pure.logic@nexus-software.ie>,
Peter Hurley <peter@hurleysoftware.com>,
linux-serial@vger.kernel.org, Vinod Koul <vinod.koul@intel.com>,
linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
ismo.puustinen@intel.com,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Subject: Re: [PATCH v10 10/11] serial: 8250_lpss: enable MSI for Intel Quark
Date: Mon, 15 Aug 2016 12:35:24 +0300 [thread overview]
Message-ID: <1471253724.4887.108.camel@linux.intel.com> (raw)
In-Reply-To: <1471251882.5063.2.camel@nexus-software.ie>
On Mon, 2016-08-15 at 10:04 +0100, Bryan O'Donoghue wrote:
> On Fri, 2016-08-12 at 19:01 +0300, Andy Shevchenko wrote:
> >
> > Intel Quark SoC supports MSI for LPSS, in particular for UART.
> > Enable
> > MSI for
> > Intel Quark.
> >
> > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> > ---
> > drivers/tty/serial/8250/8250_lpss.c | 12 ++++++++++++
> > 1 file changed, 12 insertions(+)
> >
> > diff --git a/drivers/tty/serial/8250/8250_lpss.c
> > b/drivers/tty/serial/8250/8250_lpss.c
> > index cad96ee..5ac291c 100644
> > --- a/drivers/tty/serial/8250/8250_lpss.c
> > +++ b/drivers/tty/serial/8250/8250_lpss.c
> > @@ -151,6 +151,17 @@ static int byt_serial_setup(struct lpss8250
> > *lpss, struct uart_port *port)
> > return 0;
> > }
> >
> > +static int qrk_serial_setup(struct lpss8250 *lpss, struct uart_port
> > *port)
> > +{
> > + struct pci_dev *pdev = to_pci_dev(port->dev);
> > +
> > + pci_enable_msi(pdev);
> >
>
> Andy,
>
> ret = pci_enable_msi(dev);
> if (ret)
> return ret;
>
> once added please add
Why? MSI is optional. If we can't do that we just fall back to standard
IRQ signaling.
Okay, since recent APIs [1] I should use another call actually, i.e.
pci_alloc_irq_vectors().
[1] Documentation/PCI/MSI-HOWTO.txt
>
> Reviewed-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
--
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy
next prev parent reply other threads:[~2016-08-15 9:35 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-12 16:01 [PATCH v10 00/11] serial: 8250: split LPSS to 8250_lpss, enable DMA on Quark Andy Shevchenko
2016-08-12 16:01 ` [PATCH v10 01/11] dmaengine: dw: keep copy of custom slave config in dwc Andy Shevchenko
2016-08-12 16:01 ` [PATCH v10 02/11] dmaengine: dw: set polarity of handshake interface Andy Shevchenko
2016-08-12 16:01 ` [PATCH v10 03/11] dmaengine: dw: override LLP support if asked in platform data Andy Shevchenko
2016-08-16 13:21 ` Eugeniy Paltsev
2016-08-12 16:01 ` [PATCH v10 04/11] dmaengine: dw: provide probe(), remove() stubs for users Andy Shevchenko
2016-08-12 16:01 ` [PATCH v10 05/11] serial: 8250_dma: switch to new dmaengine_terminate_* API Andy Shevchenko
2016-08-12 16:01 ` [PATCH v10 06/11] serial: 8250_dma: adjust DMA address of the UART Andy Shevchenko
2016-08-12 16:01 ` [PATCH v10 07/11] serial: 8250: enable AFE on ports where FIFO is 16 bytes Andy Shevchenko
2016-08-12 16:01 ` [PATCH v10 08/11] serial: 8250_lpss: split LPSS driver to separate module Andy Shevchenko
2016-08-12 16:01 ` [PATCH v10 09/11] serial: 8250_lpss: move Quark code from PCI driver Andy Shevchenko
2016-08-12 16:01 ` [PATCH v10 10/11] serial: 8250_lpss: enable MSI for Intel Quark Andy Shevchenko
2016-08-15 9:04 ` Bryan O'Donoghue
2016-08-15 9:35 ` Andy Shevchenko [this message]
2016-08-12 16:01 ` [PATCH v10 11/11] serial: 8250_lpss: enable DMA on Intel Quark UART Andy Shevchenko
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