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platform/chrome: chromeos_laptop - factor out getting IRQ from DMI

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This will make code instantiating I2C device a bit clearer.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
This commit is contained in:
Dmitry Torokhov 2018-03-20 15:31:31 -07:00 committed by Benson Leung
parent 4f27f677c9
commit ab6c5600d8
1 changed files with 23 additions and 12 deletions
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35
drivers/platform/chrome/chromeos_laptop.c
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@ -120,36 +120,47 @@ static struct i2c_board_info atmel_1664s_device = {
.flags = I2C_CLIENT_WAKE,
};
static int chromeos_laptop_get_irq_from_dmi(const char *dmi_name)
{
const struct dmi_device *dmi_dev;
const struct dmi_dev_onboard *dev_data;
dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, dmi_name, NULL);
if (!dmi_dev) {
pr_err("failed to find DMI device '%s'\n", dmi_name);
return -ENOENT;
}
dev_data = dmi_dev->device_data;
if (!dev_data) {
pr_err("failed to get data from DMI for '%s'\n", dmi_name);
return -EINVAL;
}
return dev_data->instance;
}
static struct i2c_client *__add_probed_i2c_device(
const char *name,
int bus,
struct i2c_board_info *info,
const unsigned short *alt_addr_list)
{
const struct dmi_device *dmi_dev;
const struct dmi_dev_onboard *dev_data;
struct i2c_adapter *adapter;
struct i2c_client *client = NULL;
const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END };
if (bus < 0)
return NULL;
/*
* If a name is specified, look for irq platform information stashed
* in DMI_DEV_TYPE_DEV_ONBOARD by the Chrome OS custom system firmware.
*/
if (name) {
dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, name, NULL);
if (!dmi_dev) {
pr_err("failed to dmi find device %s\n", name);
info->irq = chromeos_laptop_get_irq_from_dmi(name);
if (info->irq < 0)
return NULL;
}
dev_data = (struct dmi_dev_onboard *)dmi_dev->device_data;
if (!dev_data) {
pr_err("failed to get data from dmi for %s\n", name);
return NULL;
}
info->irq = dev_data->instance;
}
adapter = i2c_get_adapter(bus);