i2c: piix4: Convert piix4_main_adapter to array
The SB800 chipset supports a multiplexed main SMBus controller with
four ports. Therefore the static variable piix4_main_adapter is
converted into a piix4_main_adapters array that can hold one
i2c_adapter for each multiplexed port.
The auxiliary adapter remains unchanged since it represents the second
(not multiplexed) SMBus controller on the SB800 chipset.
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 630bce6..9c32eb1 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -75,6 +75,9 @@
#define PIIX4_WORD_DATA 0x0C
#define PIIX4_BLOCK_DATA 0x14
+/* Multi-port constants */
+#define PIIX4_MAX_ADAPTERS 4
+
/* insmod parameters */
/* If force is set to anything different from 0, we forcibly enable the
@@ -561,7 +564,7 @@
MODULE_DEVICE_TABLE (pci, piix4_ids);
-static struct i2c_adapter *piix4_main_adapter;
+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,
@@ -629,7 +632,7 @@
return retval;
/* Try to register main SMBus adapter, give up if we can't */
- retval = piix4_add_adapter(dev, retval, &piix4_main_adapter);
+ retval = piix4_add_adapter(dev, retval, &piix4_main_adapters[0]);
if (retval < 0)
return retval;
@@ -674,9 +677,13 @@
static void piix4_remove(struct pci_dev *dev)
{
- if (piix4_main_adapter) {
- piix4_adap_remove(piix4_main_adapter);
- piix4_main_adapter = NULL;
+ int port = PIIX4_MAX_ADAPTERS;
+
+ while (--port >= 0) {
+ if (piix4_main_adapters[port]) {
+ piix4_adap_remove(piix4_main_adapters[port]);
+ piix4_main_adapters[port] = NULL;
+ }
}
if (piix4_aux_adapter) {