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platform_kernel-5.15
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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>
This commit is contained in:
Christian Fetzer 2015-11-19 20:13:49 +01:00 committed by Wolfram Sang
parent 2fee61d22e
commit 725d2e3fac
1 changed files with 12 additions and 4 deletions
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16
drivers/i2c/busses/i2c-piix4.c
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@ -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 { struct i2c_piix4_adapdata {
unsigned short smba; 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 struct i2c_adapter *piix4_aux_adapter;
static int piix4_add_adapter(struct pci_dev *dev, unsigned short smba, 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_adapter *adap;
struct i2c_piix4_adapdata *adapdata; 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; adap->dev.parent = &dev->dev;
snprintf(adap->name, sizeof(adap->name), 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); 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++) { for (port = 0; port < PIIX4_MAX_ADAPTERS; port++) {
retval = piix4_add_adapter(dev, smba, retval = piix4_add_adapter(dev, smba,
piix4_main_port_names_sb800[port],
&piix4_main_adapters[port]); &piix4_main_adapters[port]);
if (retval < 0) if (retval < 0)
goto error; goto error;
@ -749,7 +756,7 @@ static int piix4_probe(struct pci_dev *dev, const struct pci_device_id *id)
return retval; return retval;
/* Try to register main SMBus adapter, give up if we can't */ /* 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]); &piix4_main_adapters[0]);
if (retval < 0) if (retval < 0)
return retval; return retval;
@ -776,7 +783,8 @@ static int piix4_probe(struct pci_dev *dev, const struct pci_device_id *id)
if (retval > 0) { if (retval > 0) {
/* Try to add the aux adapter if it exists, /* Try to add the aux adapter if it exists,
* piix4_add_adapter will clean up if this fails */ * 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; return 0;