linux/drivers/input/touchscreen/goodix.c, branch v4.9

Input: goodix - use "inverted_[xy]" flags instead of "rotated_screen"

2015-12-18T01:11:56Z

The goodix touchscreen driver uses a "rotated_screen" flag for systems on which the touchscreen is mounted rotated by 180 degrees with respect to the display. With the addition of support for the dt properties "touchscreen-inverted-x" and "touchscreen-inverted-y", a separate "rotated_screen" flag is not necessary anymore. This patch replaces it by setting the inverted_x and inverted_y flags instead. Signed-off-by: Karsten Merker Reviewed-by: Irina Tirdea Tested-by: Bastien Nocera Acked-by: Bastien Nocera Signed-off-by: Dmitry Torokhov

Input: goodix - add axis swapping and axis inversion support

2015-12-18T01:11:55Z

Implement support for the following device-tree and ACPI 5.1 DSD properties in the goodix touchscreen driver: - touchscreen-inverted-x: X axis is inverted (boolean) - touchscreen-inverted-y: Y axis is inverted (boolean) - touchscreen-swapped-x-y: X and Y axis are swapped (boolean) These are necessary on tablets which have a display in portrait format while the touchscreen is in landscape format, such as e.g. the MSI Primo 81. Signed-off-by: Karsten Merker Tested-by: Bastien Nocera Tested-by: Irina Tirdea (with ACPI DSD properties) Tested-by: Aleksei Mamlin (with device-tree properties) Acked-by: Rob Herring Signed-off-by: Dmitry Torokhov

Input: goodix - use goodix_i2c_write_u8 instead of i2c_master_send

2015-12-18T01:11:54Z

Use goodix_i2c_write_u8 instead of i2c_master_send to simplify code. Signed-off-by: Irina Tirdea Tested-by: Bastien Nocera Tested-by: Aleksei Mamlin Signed-off-by: Dmitry Torokhov

Input: goodix - add power management support

2015-12-18T01:11:53Z

Implement suspend/resume for goodix driver. The suspend and resume process uses the gpio pins. If the device ACPI/DT information does not declare gpio pins, suspend/resume will not be available for these devices. This is based on Goodix datasheets for GT911 and GT9271 and on Goodix driver gt9xx.c for Android (publicly available in Android kernel trees for various devices). Signed-off-by: Octavian Purdila Signed-off-by: Irina Tirdea Tested-by: Bastien Nocera Signed-off-by: Dmitry Torokhov

Input: goodix - write configuration data to device

2015-12-18T01:11:53Z

Goodix devices can be configured by writing custom data to the device at init. The configuration data is read with request_firmware from "goodix__cfg.bin", where is the product id read from the device (e.g.: goodix_911_cfg.bin for Goodix GT911, goodix_9271_cfg.bin for GT9271). The configuration information has a specific format described in the Goodix datasheet. It includes X/Y resolution, maximum supported touch points, interrupt flags, various sensitivity factors and settings for advanced features (like gesture recognition). Before writing the firmware, it is necessary to reset the device. If the device ACPI/DT information does not declare gpio pins (needed for reset), writing the firmware will not be available for these devices. This is based on Goodix datasheets for GT911 and GT9271 and on Goodix driver gt9xx.c for Android (publicly available in Android kernel trees for various devices). Signed-off-by: Octavian Purdila Signed-off-by: Irina Tirdea Tested-by: Bastien Nocera Tested-by: Aleksei Mamlin Signed-off-by: Dmitry Torokhov

Input: goodix - reset device at init

2015-12-18T01:11:52Z

After power on, it is recommended that the driver resets the device. The reset procedure timing is described in the datasheet and is used at device init (before writing device configuration) and for power management. It is a sequence of setting the interrupt and reset pins high/low at specific timing intervals. This procedure also includes setting the slave address to the one specified in the ACPI/device tree. This is based on Goodix datasheets for GT911 and GT9271 and on Goodix driver gt9xx.c for Android (publicly available in Android kernel trees for various devices). For reset the driver needs to control the interrupt and reset gpio pins (configured through ACPI/device tree). For devices that do not have the gpio pins properly declared, the functionality depending on these pins will not be available, but the device can still be used with basic functionality. For both device tree and ACPI, the interrupt gpio pin configuration is read from the "irq-gpios" property and the reset pin configuration is read from the "reset-gpios" property. For ACPI 5.1, named properties can be specified using the _DSD section. This functionality will not be available for devices that use indexed gpio pins declared in the _CRS section (we need to provide backward compatibility with devices that do not support using the interrupt gpio pin as output). For ACPI, the pins can be specified using ACPI 5.1: Device (STAC) { Name (_HID, "GDIX1001") ... Method (_CRS, 0, Serialized) { Name (RBUF, ResourceTemplate () { I2cSerialBus (0x0014, ControllerInitiated, 0x00061A80, AddressingMode7Bit, "\\I2C0", 0x00, ResourceConsumer, , ) GpioInt (Edge, ActiveHigh, Exclusive, PullNone, 0x0000, "\\I2C0", 0x00, ResourceConsumer, , ) { // Pin list 0 } GpioIo (Exclusive, PullDown, 0x0000, 0x0000, IoRestrictionOutputOnly, "\\I2C0", 0x00, ResourceConsumer, , ) { 1 } }) Return (RBUF) } Name (_DSD, Package () { ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), Package () { Package (2) {"irq-gpios", Package() {^STAC, 0, 0, 0 }}, Package (2) {"reset-gpios", Package() {^STAC, 1, 0, 0 }}, ... } } Signed-off-by: Octavian Purdila Signed-off-by: Irina Tirdea Acked-by: Rob Herring Acked-by: Bastien Nocera Tested-by: Bastien Nocera Tested-by: Aleksei Mamlin Signed-off-by: Dmitry Torokhov

Input: goodix - use actual config length for each device type

2015-12-18T01:11:51Z

Each of the Goodix devices supported by this driver has a fixed size for the configuration information registers. The size varies depending on the device and is specified in the datasheet. Use the proper configuration length as specified in the datasheet for each device model, so we do not read more than the actual size of the configuration registers. Signed-off-by: Irina Tirdea Acked-by: Bastien Nocera Tested-by: Bastien Nocera Tested-by: Aleksei Mamlin Signed-off-by: Dmitry Torokhov

Merge branch 'next' into for-linus

2015-09-03T17:01:44Z

Prepare first round of input updates for 4.3 merge window.

Input: export I2C module alias information in missing drivers

2015-07-30T18:05:37Z

The I2C core always reports the MODALIAS uevent as "i2c: Signed-off-by: Dmitry Torokhov

Input: goodix - fix touch coordinates on WinBook TW100 and TW700

2015-07-24T16:11:02Z

The touchscreen on the WinBook TW100 and TW700 don't match the default display, with 0,0 touches being reported when touching at the bottom right of the screen. 1280,800 0,800 +-------------+ | | | | | | +-------------+ 1280,0 0,0 It's unfortunately impossible to detect this problem with data from the DSDT, or other auxiliary metadata, so fallback to quirking this specific model of tablet instead. Signed-off-by: Bastien Nocera Reviewed-by: Benjamin Tissoires Signed-off-by: Dmitry Torokhov