linux.git/drivers/input/touchscreen/tsc2007_core.c, branch v7.2-rc2

Replace by more specific (c files)

2026-07-03T05:38:17+00:00

Replace the #include of  by the more specific
 where applicable. For most cases the include
can be dropped completely, only a few drivers need one or two headers
added.

Acked-by: Danilo Krummrich 
Acked-by: Takashi Sakamoto 
Acked-by: Bjorn Helgaas 
Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König (The Capable Hub)

Input: Use named initializers for arrays of i2c_device_data

2026-05-31T05:10:47+00:00

While being less compact, using named initializers allows to more easily
see which members of the structs are assigned which value without having
to lookup the declaration of the struct. And it's also more robust
against changes to the struct definition.

The mentioned robustness is relevant for a planned change to struct
i2c_device_id that replaces .driver_data by an anonymous union.

This patch doesn't modify the compiled arrays, only their representation
in source form benefits. The former was confirmed with x86 and arm64
builds.

Signed-off-by: Uwe Kleine-König (The Capable Hub) 
Link: https://patch.msgid.link/20260515164848.497608-2-u.kleine-koenig@baylibre.com
Signed-off-by: Dmitry Torokhov

Input: tsc2007 - reduce I2C transactions for Z2 read

2026-05-05T00:27:43+00:00

The current implementation sends a separate power-down command
after reading the Z2 value, resulting in an extra I2C
transaction per measurement cycle.

The TSC2007 command byte contains a 2-bit power-down mode
selection field. By selecting the power-down state in the Z2
measurement command, the device powers down after the Z2 A/D
conversion completes, eliminating the subsequent power-down
transaction.

This reduces the number of I2C transactions by one per touch
measurement cycle, decreasing I2C bus overhead and improving
touch sampling performance.

Signed-off-by: Yuki Horii 
Tested-by: Andreas Kemnade  # GTA04
Link: https://patch.msgid.link/20260410074100.1660-1-horiiyuk@ishida.co.jp
Signed-off-by: Dmitry Torokhov

Input: tsc2007 - use guard notation when acquiring mutexes

2026-03-25T14:53:59+00:00

This makes the code more compact and error handling more robust.

Signed-off-by: Dmitry Torokhov

Input: tsc2007 - prevent overflow in pressure calculation

2025-09-03T14:44:00+00:00

The touch resistance calculation in the tsc2007 driver is prone to
overflow if (z2 - z1) is large and also x is reasonably big. This
overflow results in the driver emitting input events when very little
touch pressure is applied. In these events the x and y coordinates can
be substantially off.

Avoid the overflow by using u64 when calculating resistance value.

Signed-off-by: Johannes Kirchmair 
Link: https://lore.kernel.org/r/20250129-fix_tsc_calculation_overflow-v2-1-9e51333496ad@skidata.com
Signed-off-by: Dmitry Torokhov

Input: tsc2007 - make interrupt optional

2025-09-03T13:59:13+00:00

In case tsc2007 is used as an ADC sensor there will be no interrupt
provided at all, so set up an interrupt only if one is present.

Signed-off-by: Svyatoslav Ryhel 
Link: https://lore.kernel.org/r/20250824091927.105121-3-clamor95@gmail.com
Signed-off-by: Dmitry Torokhov

Input: tsc2007 - change warning to debug message if pen GPIO is not defined

2025-09-03T13:59:04+00:00

Since pen GPIO request is optional, there is no reason to throw dev_warn if
such GPIO is not defined.

Signed-off-by: Svyatoslav Ryhel 
Link: https://lore.kernel.org/r/20250824091927.105121-2-clamor95@gmail.com
Signed-off-by: Dmitry Torokhov

Input: tsc2007 - accept standard properties

2024-12-11T00:17:30+00:00

Only some driver-specific properties were accepted, change it
to use the now-available standard properties which are
found in devicetrees containing this chip.

Signed-off-by: Andreas Kemnade 
Acked-by: Dmitry Torokhov 
Link: https://lore.kernel.org/r/20241205204413.2466775-2-akemnade@kernel.org
Signed-off-by: Kevin Hilman

Input: drop explicit initialization of struct i2c_device_id::driver_data to 0

2024-05-13T22:43:19+00:00

These drivers don't use the driver_data member of struct i2c_device_id,
so don't explicitly initialize this member.

This prepares putting driver_data in an anonymous union which requires
either no initialization or named designators. But it's also a nice
cleanup on its own.

While add it, also remove commas after the sentinel entries.

Signed-off-by: Uwe Kleine-König 
Link: https://lore.kernel.org/r/20240509174158.2211071-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Dmitry Torokhov

Input: Switch i2c drivers back to use .probe()

2023-05-17T16:59:11+00:00

After commit b8a1a4cd5a98 ("i2c: Provide a temporary .probe_new()
call-back type"), all drivers being converted to .probe_new() and then
03c835f498b5 ("i2c: Switch .probe() to not take an id parameter") convert
back to (the new) .probe() to be able to eventually drop .probe_new() from
struct i2c_driver.

Signed-off-by: Uwe Kleine-König 
Link: https://lore.kernel.org/r/20230517164645.162294-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Dmitry Torokhov