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Date: Mon, 7 Jan 2013 12:44:32 +0200
From: Mika Westerberg <mika.westerberg@...ux.intel.com>
To: linux-kernel@...r.kernel.org
Cc: grant.likely@...retlab.ca, linus.walleij@...aro.org,
eric.y.miao@...il.com, linux@....linux.org.uk,
haojian.zhuang@...il.com, broonie@...nsource.wolfsonmicro.com,
chao.bi@...el.com,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: [PATCH 03/11] spi/pxa2xx-pci: switch to use pcim_* interfaces
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@...ux.intel.com>
---
drivers/spi/spi-pxa2xx-pci.c | 86 +++++++++++++++---------------------------
1 file changed, 30 insertions(+), 56 deletions(-)
diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c
index cf95587..ece979e 100644
--- a/drivers/spi/spi-pxa2xx-pci.c
+++ b/drivers/spi/spi-pxa2xx-pci.c
@@ -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);
- pci_set_drvdata(dev, spi_info);
+ 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);
- ret = platform_device_add(pdev);
- if (ret)
- goto err_dev_add;
+ pdev = platform_device_register_full(&pi);
+ if (!pdev) {
+ mutex_lock(&ssp_lock);
+ list_del(&ssp->node);
+ mutex_unlock(&ssp_lock);
- return ret;
+ return -ENOMEM;
+ }
-err_dev_add:
- pci_set_drvdata(dev, NULL);
- mutex_lock(&ssp_lock);
- list_del(&ssp->node);
- mutex_unlock(&ssp_lock);
- iounmap(ssp->mmio_base);
+ spi_info->spi_pdev = pdev;
+ pci_set_drvdata(dev, spi_info);
-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) = {
--
1.7.10.4
--
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