[PATCH 2/2] spi: pca2xx-pci: Allow MSI

Jan Kiszka
2017-01-16T09:06:41Z

Now that the core is ready for edge-triggered interrupts, we can safely
allow the PCI versions that provide this to enable the feature and,
thus, have less shared interrupts.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
drivers/spi/spi-pxa2xx-pci.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c
index 58d2d48..e7e5b08 100644
--- a/drivers/spi/spi-pxa2xx-pci.c
+++ b/drivers/spi/spi-pxa2xx-pci.c
@@ -203,16 +203,24 @@ static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
ssp = &spi_pdata.ssp;
ssp->phys_base = pci_resource_start(dev, 0);
ssp->mmio_base = pcim_iomap_table(dev)[0];
- ssp->irq = dev->irq;
ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
ssp->type = c->type;

snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL, 0,
c->max_clk_rate);
- if (IS_ERR(ssp->clk))
+ if (IS_ERR(ssp->clk))
return PTR_ERR(ssp->clk);

+ pci_set_master(dev);
+
+ ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES);
+ if (ret < 0) {
+ clk_unregister(ssp->clk);
+ return ret;
+ }
+ ssp->irq = pci_irq_vector(dev, 0);
+
memset(&pi, 0, sizeof(pi));
pi.fwnode = dev->dev.fwnode;
pi.parent = &dev->dev;
@@ -224,6 +232,7 @@ static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
pdev = platform_device_register_full(&pi);
if (IS_ERR(pdev)) {
clk_unregister(ssp->clk);
+ pci_free_irq_vectors(dev);
return PTR_ERR(pdev);
}

@@ -241,6 +250,7 @@ static void pxa2xx_spi_pci_remove(struct pci_dev *dev)

platform_device_unregister(pdev);
clk_unregister(spi_pdata->ssp.clk);
+ pci_free_irq_vectors(dev);
}

static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
--
2.1.4