linux/drivers/spi/spi-pxa2xx-pci.c
Mika Westerberg 851bacf590 spi/pxa2xx: embed the ssp_device to platform data
The spi-pxa2xx-pci glue driver had to implement pxa_ssp_request()/free() in
order to support the spi-pxa2xx platform driver. Since the ACPI enabled
platforms can use the same platform driver we would need to implement
pxa_ssp_request()/free() in some central place that can be shared by the
ACPI and PCI glue code.

Instead of doing that we can make pxa_ssp_request()/free() to be available
only when CONFIG_ARCH_PXA is set. On other arches these are being stubbed
out in preference to passing the ssp_device from the platform data
directly.

We also change the SPI bus number to be taken from ssp->port_id instead of
platform device id. This way the supporting code that passes the ssp can
decide the number (or it can set it to the same as pdev->id).

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-08 11:00:32 +00:00

83 lines
1.9 KiB
C

/*
* CE4100's SPI device is more or less the same one as found on PXA
*
*/
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include <linux/module.h>
#include <linux/spi/pxa2xx_spi.h>
static int ce4100_spi_probe(struct pci_dev *dev,
const struct pci_device_id *ent)
{
struct platform_device_info pi;
int ret;
struct platform_device *pdev;
struct pxa2xx_spi_master spi_pdata;
struct ssp_device *ssp;
ret = pcim_enable_device(dev);
if (ret)
return ret;
ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
if (!ret)
return ret;
memset(&spi_pdata, 0, sizeof(spi_pdata));
spi_pdata.num_chipselect = dev->devfn;
ssp = &spi_pdata.ssp;
ssp->phys_base = pci_resource_start(dev, 0);
ssp->mmio_base = pcim_iomap_table(dev)[0];
if (!ssp->mmio_base) {
dev_err(&dev->dev, "failed to ioremap() registers\n");
return -EIO;
}
ssp->irq = dev->irq;
ssp->port_id = dev->devfn;
ssp->type = PXA25x_SSP;
memset(&pi, 0, sizeof(pi));
pi.parent = &dev->dev;
pi.name = "pxa2xx-spi";
pi.id = ssp->port_id;
pi.data = &spi_pdata;
pi.size_data = sizeof(spi_pdata);
pdev = platform_device_register_full(&pi);
if (!pdev)
return -ENOMEM;
pci_set_drvdata(dev, pdev);
return 0;
}
static void ce4100_spi_remove(struct pci_dev *dev)
{
struct platform_device *pdev = pci_get_drvdata(dev);
platform_device_unregister(pdev);
}
static DEFINE_PCI_DEVICE_TABLE(ce4100_spi_devices) = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e6a) },
{ },
};
MODULE_DEVICE_TABLE(pci, ce4100_spi_devices);
static struct pci_driver ce4100_spi_driver = {
.name = "ce4100_spi",
.id_table = ce4100_spi_devices,
.probe = ce4100_spi_probe,
.remove = ce4100_spi_remove,
};
module_pci_driver(ce4100_spi_driver);
MODULE_DESCRIPTION("CE4100 PCI-SPI glue code for PXA's driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");