diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2014-06-17 14:02:00 -0700 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2014-07-10 09:34:48 -0700 |
| commit | da3b0ab75aadab63d1ffd5563100c9386e444dad (patch) | |
| tree | 8eac06c74569bb137d8855e5cdb580029dd47aa7 /drivers/platform/chrome | |
| parent | cd3de83f147601356395b57a8673e9c5ff1e59d1 (diff) | |
platform/chrome: chromeos_laptop - Add support for Acer C720
Acer C720 has touchpad and light sensor connected to a separate I2C buses.
Since the designware I2C host controller driver has two instances on this
particular machine we need a way to match the correct instance. Add support
for this and then register both C720 touchpad and light sensor.
This code is based on following patch from Benson Leung:
https://patchwork.kernel.org/patch/3074411/
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'drivers/platform/chrome')
| -rw-r--r-- | drivers/platform/chrome/chromeos_laptop.c | 45 |
1 files changed, 39 insertions, 6 deletions
diff --git a/drivers/platform/chrome/chromeos_laptop.c b/drivers/platform/chrome/chromeos_laptop.c index 7f1a2e2711bd..a241e5fa6c83 100644 --- a/drivers/platform/chrome/chromeos_laptop.c +++ b/drivers/platform/chrome/chromeos_laptop.c @@ -45,6 +45,8 @@ static const char *i2c_adapter_names[] = { "SMBus I801 adapter", "i915 gmbus vga", "i915 gmbus panel", + "i2c-designware-pci", + "i2c-designware-pci", }; /* Keep this enum consistent with i2c_adapter_names */ @@ -52,6 +54,8 @@ enum i2c_adapter_type { I2C_ADAPTER_SMBUS = 0, I2C_ADAPTER_VGADDC, I2C_ADAPTER_PANEL, + I2C_ADAPTER_DESIGNWARE_0, + I2C_ADAPTER_DESIGNWARE_1, }; struct i2c_peripheral { @@ -172,29 +176,42 @@ static struct i2c_client *__add_probed_i2c_device( return client; } +struct i2c_lookup { + const char *name; + int instance; + int n; +}; + static int __find_i2c_adap(struct device *dev, void *data) { - const char *name = data; + struct i2c_lookup *lookup = data; static const char *prefix = "i2c-"; struct i2c_adapter *adapter; if (strncmp(dev_name(dev), prefix, strlen(prefix)) != 0) return 0; adapter = to_i2c_adapter(dev); - return (strncmp(adapter->name, name, strlen(name)) == 0); + if (strncmp(adapter->name, lookup->name, strlen(lookup->name)) == 0 && + lookup->n++ == lookup->instance) + return 1; + return 0; } static int find_i2c_adapter_num(enum i2c_adapter_type type) { struct device *dev = NULL; struct i2c_adapter *adapter; - const char *name = i2c_adapter_names[type]; + struct i2c_lookup lookup; + + memset(&lookup, 0, sizeof(lookup)); + lookup.name = i2c_adapter_names[type]; + lookup.instance = (type == I2C_ADAPTER_DESIGNWARE_1) ? 1 : 0; + /* find the adapter by name */ - dev = bus_find_device(&i2c_bus_type, NULL, (void *)name, - __find_i2c_adap); + dev = bus_find_device(&i2c_bus_type, NULL, &lookup, __find_i2c_adap); if (!dev) { /* Adapters may appear later. Deferred probing will retry */ pr_notice("%s: i2c adapter %s not found on system.\n", __func__, - name); + lookup.name); return -ENODEV; } adapter = to_i2c_adapter(dev); @@ -377,6 +394,15 @@ static struct chromeos_laptop acer_ac700 = { }, }; +static struct chromeos_laptop acer_c720 = { + .i2c_peripherals = { + /* Touchpad. */ + { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 }, + /* Light Sensor. */ + { .add = setup_isl29018_als, I2C_ADAPTER_DESIGNWARE_1 }, + }, +}; + static struct chromeos_laptop hp_pavilion_14_chromebook = { .i2c_peripherals = { /* Touchpad. */ @@ -434,6 +460,13 @@ static struct dmi_system_id chromeos_laptop_dmi_table[] __initdata = { _CBDD(acer_ac700), }, { + .ident = "Acer C720", + .matches = { + DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"), + }, + _CBDD(acer_c720), + }, + { .ident = "HP Pavilion 14 Chromebook", .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"), |