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Diffstat (limited to 'kernel/drivers/i2c/busses/i2c-ismt.c')
-rw-r--r--kernel/drivers/i2c/busses/i2c-ismt.c82
1 files changed, 16 insertions, 66 deletions
diff --git a/kernel/drivers/i2c/busses/i2c-ismt.c b/kernel/drivers/i2c/busses/i2c-ismt.c
index f994712d0..7ba795b24 100644
--- a/kernel/drivers/i2c/busses/i2c-ismt.c
+++ b/kernel/drivers/i2c/busses/i2c-ismt.c
@@ -67,7 +67,7 @@
#include <linux/acpi.h>
#include <linux/interrupt.h>
-#include <asm-generic/io-64-nonatomic-lo-hi.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
/* PCI Address Constants */
#define SMBBAR 0
@@ -165,14 +165,13 @@ struct ismt_desc {
struct ismt_priv {
struct i2c_adapter adapter;
- void *smba; /* PCI BAR */
+ void __iomem *smba; /* PCI BAR */
struct pci_dev *pci_dev;
struct ismt_desc *hw; /* descriptor virt base addr */
dma_addr_t io_rng_dma; /* descriptor HW base addr */
u8 head; /* ring buffer head pointer */
struct completion cmp; /* interrupt completion */
u8 dma_buffer[I2C_SMBUS_BLOCK_MAX + 1]; /* temp R/W data buffer */
- bool using_msi; /* type of interrupt flag */
};
/**
@@ -398,7 +397,7 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr,
desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(addr, read_write);
/* Initialize common control bits */
- if (likely(priv->using_msi))
+ if (likely(pci_dev_msi_enabled(priv->pci_dev)))
desc->control = ISMT_DESC_INT | ISMT_DESC_FAIR;
else
desc->control = ISMT_DESC_FAIR;
@@ -789,11 +788,8 @@ static int ismt_int_init(struct ismt_priv *priv)
/* Try using MSI interrupts */
err = pci_enable_msi(priv->pci_dev);
- if (err) {
- dev_warn(&priv->pci_dev->dev,
- "Unable to use MSI interrupts, falling back to legacy\n");
+ if (err)
goto intx;
- }
err = devm_request_irq(&priv->pci_dev->dev,
priv->pci_dev->irq,
@@ -806,11 +802,13 @@ static int ismt_int_init(struct ismt_priv *priv)
goto intx;
}
- priv->using_msi = true;
- goto done;
+ return 0;
/* Try using legacy interrupts */
intx:
+ dev_warn(&priv->pci_dev->dev,
+ "Unable to use MSI interrupts, falling back to legacy\n");
+
err = devm_request_irq(&priv->pci_dev->dev,
priv->pci_dev->irq,
ismt_do_interrupt,
@@ -819,12 +817,9 @@ intx:
priv);
if (err) {
dev_err(&priv->pci_dev->dev, "no usable interrupts\n");
- return -ENODEV;
+ return err;
}
- priv->using_msi = false;
-
-done:
return 0;
}
@@ -847,17 +842,13 @@ ismt_probe(struct pci_dev *pdev, const struct pci_device_id *id)
return -ENOMEM;
pci_set_drvdata(pdev, priv);
+
i2c_set_adapdata(&priv->adapter, priv);
priv->adapter.owner = THIS_MODULE;
-
priv->adapter.class = I2C_CLASS_HWMON;
-
priv->adapter.algo = &smbus_algorithm;
-
- /* set up the sysfs linkage to our parent device */
priv->adapter.dev.parent = &pdev->dev;
-
- /* number of retries on lost arbitration */
+ ACPI_COMPANION_SET(&priv->adapter.dev, ACPI_COMPANION(&pdev->dev));
priv->adapter.retries = ISMT_MAX_RETRIES;
priv->pci_dev = pdev;
@@ -904,8 +895,7 @@ ismt_probe(struct pci_dev *pdev, const struct pci_device_id *id)
priv->smba = pcim_iomap(pdev, SMBBAR, len);
if (!priv->smba) {
dev_err(&pdev->dev, "Unable to ioremap SMBus BAR\n");
- err = -ENODEV;
- goto fail;
+ return -ENODEV;
}
if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) ||
@@ -915,32 +905,26 @@ ismt_probe(struct pci_dev *pdev, const struct pci_device_id *id)
DMA_BIT_MASK(32)) != 0)) {
dev_err(&pdev->dev, "pci_set_dma_mask fail %p\n",
pdev);
- err = -ENODEV;
- goto fail;
+ return -ENODEV;
}
}
err = ismt_dev_init(priv);
if (err)
- goto fail;
+ return err;
ismt_hw_init(priv);
err = ismt_int_init(priv);
if (err)
- goto fail;
+ return err;
err = i2c_add_adapter(&priv->adapter);
if (err) {
dev_err(&pdev->dev, "Failed to add SMBus iSMT adapter\n");
- err = -ENODEV;
- goto fail;
+ return -ENODEV;
}
return 0;
-
-fail:
- pci_release_region(pdev, SMBBAR);
- return err;
}
/**
@@ -952,47 +936,13 @@ static void ismt_remove(struct pci_dev *pdev)
struct ismt_priv *priv = pci_get_drvdata(pdev);
i2c_del_adapter(&priv->adapter);
- pci_release_region(pdev, SMBBAR);
}
-/**
- * ismt_suspend() - place the device in suspend
- * @pdev: PCI-Express device
- * @mesg: PM message
- */
-#ifdef CONFIG_PM
-static int ismt_suspend(struct pci_dev *pdev, pm_message_t mesg)
-{
- pci_save_state(pdev);
- pci_set_power_state(pdev, pci_choose_state(pdev, mesg));
- return 0;
-}
-
-/**
- * ismt_resume() - PCI resume code
- * @pdev: PCI-Express device
- */
-static int ismt_resume(struct pci_dev *pdev)
-{
- pci_set_power_state(pdev, PCI_D0);
- pci_restore_state(pdev);
- return pci_enable_device(pdev);
-}
-
-#else
-
-#define ismt_suspend NULL
-#define ismt_resume NULL
-
-#endif
-
static struct pci_driver ismt_driver = {
.name = "ismt_smbus",
.id_table = ismt_ids,
.probe = ismt_probe,
.remove = ismt_remove,
- .suspend = ismt_suspend,
- .resume = ismt_resume,
};
module_pci_driver(ismt_driver);