aboutsummaryrefslogtreecommitdiff
path: root/drivers/i2c/busses
diff options
context:
space:
mode:
authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2013-04-10 00:36:38 +0000
committerWolfram Sang <wsa@the-dreams.de>2013-04-15 18:17:06 +0200
commit76cf3fc844a46b5cdb94da98bffcbd45d4c355b8 (patch)
tree488d4ad6e6cc31496d8c2e66897fd5c9e589d160 /drivers/i2c/busses
parentca0c1ff528a332e6f83d4566c2c8eb05b108c83c (diff)
downloadvexpress-lsk-76cf3fc844a46b5cdb94da98bffcbd45d4c355b8.tar.gz
i2c-designware-pci: use managed functions pcim_* and devm_*
This makes the error handling much more simpler than open-coding everything and in addition makes the probe function smaller an tidier. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/busses')
-rw-r--r--drivers/i2c/busses/i2c-designware-pcidrv.c68
1 files changed, 17 insertions, 51 deletions
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index eed149d0b68..aacb64e916a 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -212,8 +212,6 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
{
struct dw_i2c_dev *dev;
struct i2c_adapter *adap;
- unsigned long start, len;
- void __iomem *base;
int r;
struct dw_pci_controller *controller;
@@ -225,51 +223,30 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
controller = &dw_pci_controllers[id->driver_data];
- r = pci_enable_device(pdev);
+ r = pcim_enable_device(pdev);
if (r) {
dev_err(&pdev->dev, "Failed to enable I2C PCI device (%d)\n",
r);
- goto exit;
+ return r;
}
- /* Determine the address of the I2C area */
- start = pci_resource_start(pdev, 0);
- len = pci_resource_len(pdev, 0);
- if (!start || len == 0) {
- dev_err(&pdev->dev, "base address not set\n");
- r = -ENODEV;
- goto exit;
- }
-
- r = pci_request_region(pdev, 0, DRIVER_NAME);
+ r = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
if (r) {
- dev_err(&pdev->dev, "failed to request I2C region "
- "0x%lx-0x%lx\n", start,
- (unsigned long)pci_resource_end(pdev, 0));
- goto exit;
- }
-
- base = ioremap_nocache(start, len);
- if (!base) {
dev_err(&pdev->dev, "I/O memory remapping failed\n");
- r = -ENOMEM;
- goto err_release_region;
+ return r;
}
-
- dev = kzalloc(sizeof(struct dw_i2c_dev), GFP_KERNEL);
- if (!dev) {
- r = -ENOMEM;
- goto err_release_region;
- }
+ dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
init_completion(&dev->cmd_complete);
mutex_init(&dev->lock);
dev->clk = NULL;
dev->controller = controller;
dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz;
- dev->base = base;
- dev->dev = get_device(&pdev->dev);
+ dev->base = pcim_iomap_table(pdev)[0];
+ dev->dev = &pdev->dev;
dev->functionality =
I2C_FUNC_I2C |
I2C_FUNC_SMBUS_BYTE |
@@ -284,7 +261,7 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
dev->rx_fifo_depth = controller->rx_fifo_depth;
r = i2c_dw_init(dev);
if (r)
- goto err_iounmap;
+ return r;
adap = &dev->adapter;
i2c_set_adapdata(adap, dev);
@@ -296,10 +273,11 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
snprintf(adap->name, sizeof(adap->name), "i2c-designware-pci-%d",
adap->nr);
- r = request_irq(pdev->irq, i2c_dw_isr, IRQF_SHARED, adap->name, dev);
+ r = devm_request_irq(&pdev->dev, pdev->irq, i2c_dw_isr, IRQF_SHARED,
+ adap->name, dev);
if (r) {
dev_err(&pdev->dev, "failure requesting irq %i\n", dev->irq);
- goto err_iounmap;
+ return r;
}
i2c_dw_disable_int(dev);
@@ -307,24 +285,16 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
r = i2c_add_numbered_adapter(adap);
if (r) {
dev_err(&pdev->dev, "failure adding adapter\n");
- goto err_free_irq;
+ return r;
}
+ /* Increase reference counter */
+ get_device(&pdev->dev);
+
pm_runtime_put_noidle(&pdev->dev);
pm_runtime_allow(&pdev->dev);
return 0;
-
-err_free_irq:
- free_irq(pdev->irq, dev);
-err_iounmap:
- iounmap(dev->base);
- put_device(&pdev->dev);
- kfree(dev);
-err_release_region:
- pci_release_region(pdev, 0);
-exit:
- return r;
}
static void i2c_dw_pci_remove(struct pci_dev *pdev)
@@ -337,10 +307,6 @@ static void i2c_dw_pci_remove(struct pci_dev *pdev)
i2c_del_adapter(&dev->adapter);
put_device(&pdev->dev);
-
- free_irq(dev->irq, dev);
- kfree(dev);
- pci_release_region(pdev, 0);
}
/* work with hotplug and coldplug */