luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

spi/pxa2xx-pci: switch to use pcim_* interfaces

Browse Source 
Instead of open-coding all the error management in the driver we can take
advantage of the pcim_* interfaces that release the resources automatically.

We also use platform_device_register_full() to register the platform device
because it allows us to create and register the platform device at one go,
simplifying the error management.

This a preparatory step for getting rid of pxa_ssp_request()/free() which
we will do in the next patch.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mika Westerberg 2013-01-07 12:44:32 +02:00 committed by Mark Brown
parent e1b0f0df6a
commit 0202775bc3
1 changed files with 32 additions and 58 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

90
drivers/spi/spi-pxa2xx-pci.c
View File

@ -54,101 +54,75 @@ EXPORT_SYMBOL_GPL(pxa_ssp_free);
static int ce4100_spi_probe(struct pci_dev *dev,
const struct pci_device_id *ent)
{
struct platform_device_info pi;
int ret;
resource_size_t phys_beg;
resource_size_t phys_len;
struct ce4100_info *spi_info;
struct platform_device *pdev;
struct pxa2xx_spi_master spi_pdata;
struct ssp_device *ssp;
ret = pci_enable_device(dev);
ret = pcim_enable_device(dev);
if (ret)
return ret;
phys_beg = pci_resource_start(dev, 0);
phys_len = pci_resource_len(dev, 0);
if (!request_mem_region(phys_beg, phys_len,
"CE4100 SPI")) {
dev_err(&dev->dev, "Can't request register space.\n");
ret = -EBUSY;
ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
if (!ret)
return ret;
}
pdev = platform_device_alloc("pxa2xx-spi", dev->devfn);
spi_info = kzalloc(sizeof(*spi_info), GFP_KERNEL);
if (!pdev || !spi_info ) {
ret = -ENOMEM;
goto err_nomem;
}
spi_info = devm_kzalloc(&dev->dev, sizeof(*spi_info), GFP_KERNEL);
if (!spi_info)
return -ENOMEM;
memset(&spi_pdata, 0, sizeof(spi_pdata));
spi_pdata.num_chipselect = dev->devfn;
ret = platform_device_add_data(pdev, &spi_pdata, sizeof(spi_pdata));
if (ret)
goto err_nomem;
pdev->dev.parent = &dev->dev;
pdev->dev.of_node = dev->dev.of_node;
ssp = &spi_info->ssp;
ssp->phys_base = pci_resource_start(dev, 0);
ssp->mmio_base = ioremap(phys_beg, phys_len);
ssp->mmio_base = pcim_iomap_table(dev)[0];
if (!ssp->mmio_base) {
dev_err(&pdev->dev, "failed to ioremap() registers\n");
ret = -EIO;
goto err_nomem;
dev_err(&dev->dev, "failed to ioremap() registers\n");
return -EIO;
}
ssp->irq = dev->irq;
ssp->port_id = pdev->id;
ssp->port_id = dev->devfn;
ssp->type = PXA25x_SSP;
mutex_lock(&ssp_lock);
list_add(&ssp->node, &ssp_list);
mutex_unlock(&ssp_lock);
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) {
mutex_lock(&ssp_lock);
list_del(&ssp->node);
mutex_unlock(&ssp_lock);
return -ENOMEM;
}
spi_info->spi_pdev = pdev;
pci_set_drvdata(dev, spi_info);
ret = platform_device_add(pdev);
if (ret)
goto err_dev_add;
return ret;
err_dev_add:
pci_set_drvdata(dev, NULL);
mutex_lock(&ssp_lock);
list_del(&ssp->node);
mutex_unlock(&ssp_lock);
iounmap(ssp->mmio_base);
err_nomem:
release_mem_region(phys_beg, phys_len);
platform_device_put(pdev);
kfree(spi_info);
return ret;
return 0;
}
static void ce4100_spi_remove(struct pci_dev *dev)
{
struct ce4100_info *spi_info;
struct ssp_device *ssp;
struct ce4100_info *spi_info = pci_get_drvdata(dev);
struct ssp_device *ssp = &spi_info->ssp;
spi_info = pci_get_drvdata(dev);
ssp = &spi_info->ssp;
platform_device_unregister(spi_info->spi_pdev);
iounmap(ssp->mmio_base);
release_mem_region(pci_resource_start(dev, 0),
pci_resource_len(dev, 0));
mutex_lock(&ssp_lock);
list_del(&ssp->node);
mutex_unlock(&ssp_lock);
pci_set_drvdata(dev, NULL);
pci_disable_device(dev);
kfree(spi_info);
}
static DEFINE_PCI_DEVICE_TABLE(ce4100_spi_devices) = {