diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/x86-android-tablets/lenovo.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/platform/x86/x86-android-tablets/lenovo.c b/drivers/platform/x86/x86-android-tablets/lenovo.c index a571dcd11544..b5dd74bf9e8c 100644 --- a/drivers/platform/x86/x86-android-tablets/lenovo.c +++ b/drivers/platform/x86/x86-android-tablets/lenovo.c @@ -41,10 +41,13 @@ static struct lp855x_platform_data lenovo_lp8557_pdata = { /* Lenovo Yoga Book X90F / X90L's Android factory img has everything hardcoded */ /* - * The HiDeep IST940E touchscreen comes up in HID mode and could alternatively - * be used in I2C-HID mode (I2C-HID descriptor reg 0x0020) if i2c-hid-of.c is - * modified to use generic (non-OF) device-properties and thought to deal with - * the reset GPIO. "hideep,force-native-protocol" resets it to native mode. + * The HiDeep IST940E touchscreen comes up in I2C-HID mode. The native protocol + * reports ABS_MT_PRESSURE and ABS_MT_TOUCH_MAJOR which are not reported in HID + * mode, so using native mode is preferred. + * It could alternatively be used in HID mode by changing the properties to: + * PROPERTY_ENTRY_U32("hid-descr-addr", 0x0020), + * PROPERTY_ENTRY_U32("post-reset-deassert-delay-ms", 120), + * and changing board_info.type to "hid-over-i2c". */ static const struct property_entry lenovo_yb1_x90_hideep_ts_props[] = { PROPERTY_ENTRY_U32("touchscreen-size-x", 1200), |