i2c: piix4: Add adapter port name support for SB800 chipset

This patch adds support for port names for the SB800 chipset.
Since the chipset supports a multiplexed main SMBus controller, adding
the channel name to the adapter name is necessary to differentiate the
ports better (for example in sensors output).

Signed-off-by: Christian Fetzer <fetzer.ch@gmail.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index 6b4231d..af4e606 100644 (file)
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -136,6 +136,12 @@ static const struct dmi_system_id piix4_dmi_ibm[] = {
        { },
 };
 
+/* SB800 globals */
+static const char *piix4_main_port_names_sb800[PIIX4_MAX_ADAPTERS] = {
+       "SDA0", "SDA2", "SDA3", "SDA4"
+};
+static const char *piix4_aux_port_name_sb800 = "SDA1";
+
 struct i2c_piix4_adapdata {
        unsigned short smba;
 
@@ -619,7 +625,7 @@ static struct i2c_adapter *piix4_main_adapters[PIIX4_MAX_ADAPTERS];
 static struct i2c_adapter *piix4_aux_adapter;
 
 static int piix4_add_adapter(struct pci_dev *dev, unsigned short smba,
-                            struct i2c_adapter **padap)
+                            const char *name, struct i2c_adapter **padap)
 {
        struct i2c_adapter *adap;
        struct i2c_piix4_adapdata *adapdata;
@@ -648,7 +654,7 @@ static int piix4_add_adapter(struct pci_dev *dev, unsigned short smba,
        adap->dev.parent = &dev->dev;
 
        snprintf(adap->name, sizeof(adap->name),
-               "SMBus PIIX4 adapter at %04x", smba);
+               "SMBus PIIX4 adapter %s at %04x", name, smba);
 
        i2c_set_adapdata(adap, adapdata);
 
@@ -680,6 +686,7 @@ static int piix4_add_adapters_sb800(struct pci_dev *dev, unsigned short smba)
 
        for (port = 0; port < PIIX4_MAX_ADAPTERS; port++) {
                retval = piix4_add_adapter(dev, smba,
+                                          piix4_main_port_names_sb800[port],
                                           &piix4_main_adapters[port]);
                if (retval < 0)
                        goto error;
@@ -749,7 +756,7 @@ static int piix4_probe(struct pci_dev *dev, const struct pci_device_id *id)
                        return retval;
 
                /* Try to register main SMBus adapter, give up if we can't */
-               retval = piix4_add_adapter(dev, retval,
+               retval = piix4_add_adapter(dev, retval, "main",
                                           &piix4_main_adapters[0]);
                if (retval < 0)
                        return retval;
@@ -776,7 +783,8 @@ static int piix4_probe(struct pci_dev *dev, const struct pci_device_id *id)
        if (retval > 0) {
                /* Try to add the aux adapter if it exists,
                 * piix4_add_adapter will clean up if this fails */
-               piix4_add_adapter(dev, retval, &piix4_aux_adapter);
+               piix4_add_adapter(dev, retval, piix4_aux_port_name_sb800,
+                                 &piix4_aux_adapter);
        }
 
        return 0;