linux-toradex.git/drivers/input/mouse/elan_i2c_smbus.c, branch v4.14 Linux kernel for Apalis and Colibri modules Input: elan_i2c - support touchpads with two physical buttons 2017-08-19T00:07:02+00:00 KT Liao kt.liao@emc.com.tw 2017-08-18T23:49:53+00:00 991368818df4a50f50d2ce673b308f946ed635a6 Elan touchpads on Asus ROG G752xx series laptops have 2 physical buttons. Luckily we can query the touchpad to see if it is a clickpad variant and adjust the behavior accordingly. Signed-off-by: KT Liao <kt.liao@emc.com.tw> Tested-by: Maxime Bellengé <maxime.bellenge@gmail.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> 
Elan touchpads on Asus ROG G752xx series laptops have 2 physical buttons.
Luckily we can query the touchpad to see if it is a clickpad variant and
adjust the behavior accordingly.

Signed-off-by: KT Liao <kt.liao@emc.com.tw>
Tested-by: Maxime Bellengé <maxime.bellenge@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
 Input: elan_i2c - add support for fetching chip type on newer hardware 2017-05-12T00:44:23+00:00 KT Liao ktalex.liao@gmail.com 2016-11-28T04:59:29+00:00 a2eaf299d134cfe780c68c771f88d81516c1e70d Newer Elantech hardware requires different way of fetching chip type and version data. Signed-off-by: KT Liao <kt.liao@emc.com.tw> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> 
Newer Elantech hardware requires different way of fetching chip type and
version data.

Signed-off-by: KT Liao <kt.liao@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Input: elan_i2c - fix return tests of i2c_smbus_read_block_data() 2016-10-03T23:41:00+00:00 Benjamin Tissoires benjamin.tissoires@redhat.com 2016-09-30T23:42:19+00:00 265d426d7470d53e900379960eef5b4482125089 i2c_smbus_read_block_data() returns negative errno else the number of data bytes in the slave's response. Checking for error not null means the function always fails if the device answers properly. So given that we read 3 bytes and access those, better check that we actually read those 3 bytes. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> 
i2c_smbus_read_block_data() returns negative errno else the number of
data bytes in the slave's response.

Checking for error not null means the function always fails if the device
answers properly.

So given that we read 3 bytes and access those, better check that we
actually read those 3 bytes.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
 Input: elan_i2c - expand maximum product_id form 0xFF to 0xFFFF 2015-09-21T16:32:40+00:00 Duson Lin dusonlin@emc.com.tw 2015-09-21T16:26:46+00:00 ed75a14eb554995c522a3b861d4c86a7eddb2ad7 In order to support more projects in the future, we expand the maximum product_id value form 0xFF to 0xFFFF. Signed-off by: Duson Lin <dusonlin@emc.com.tw> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> 
In order to support more projects in the future, we expand the
maximum product_id value form 0xFF to 0xFFFF.

Signed-off by: Duson Lin <dusonlin@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
 Input: elan_i2c - add support for multi IC type and iap format 2015-06-09T00:12:24+00:00 Duson Lin dusonlin@emc.com.tw 2015-06-08T23:39:35+00:00 12018ac3d679d6a3c6c738ac805797fe4dd43912 In order to support multiple IC types for i2c/smbus protocol, add get ic type command and use this data when checking firmware page count and signature address. Signed-off-by: Duson Lin <dusonlin@emc.com.tw> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> 
In order to support multiple IC types for i2c/smbus protocol, add get ic
type command and use this data when checking firmware page count and
signature address.

Signed-off-by: Duson Lin <dusonlin@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Input: elan_i2c - fix calculating number of x and y traces. 2015-04-20T17:30:09+00:00 Duson Lin dusonlin@emc.com.tw 2015-04-20T17:19:24+00:00 9f423801c9e849df56b37833df895685c9d8a940 According to Elan's firmware engineers we should not be subtracting 1 form the raw number of x and y traces so that the pitch size is correct. For example, if the touchpad x resolution is 2800 and x trace number is 20, the pitch size of x should be 2800/20 = 140, not 2800/19 = 147.36. Signed-off-by: Duson Lin <dusonlin@emc.com.tw> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> 
According to Elan's firmware engineers we should not be subtracting 1 form
the raw number of x and y traces so that the pitch size is correct. For
example, if the touchpad x resolution is 2800 and x trace number is 20,
the pitch size of x should be 2800/20 = 140, not 2800/19 = 147.36.

Signed-off-by: Duson Lin <dusonlin@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Input: elan_i2c - adjust for newer firmware pressure reporting 2015-04-14T17:21:42+00:00 duson dusonlin@emc.com.tw 2015-04-12T23:01:05+00:00 b9bced0eecd77067f4659b90d5ab2fb32485c3e2 Get pressure format flag from firmware to check if we need to normalize pressure data before reporting it. Signed-off-by: Duson Lin <dusonlin@emc.com.tw> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> 
Get pressure format flag from firmware to check if we need to normalize
pressure data before reporting it.

Signed-off-by: Duson Lin <dusonlin@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Input: elan_i2c - fix wrong %p extension 2015-02-06T23:32:18+00:00 Rasmus Villemoes linux@rasmusvillemoes.dk 2015-02-06T16:39:20+00:00 98a4a59ee31a12105a2b84f5b8b515ac2cb208ef There's no %px extension. From the context I think the intention was to dump the five bytes which were not as expected, and for that one should use %ph. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> 
There's no %px extension. From the context I think the intention was to
dump the five bytes which were not as expected, and for that one should use
%ph.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Input: elan_i2c - verify firmware signature applying it 2015-01-23T17:44:21+00:00 Duson Lin dusonlin@emc.com.tw 2015-01-23T17:35:07+00:00 bb03bf3f8427a38112819061fc8688999ba02f67 To allow for different firmware sizes let's replace the original size check with with checking the signature in the firmware data. Signed-off-by: Duson Lin <dusonlin@emc.com.tw> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> 
To allow for different firmware sizes let's replace the original size check
with with checking the signature in the firmware data.

Signed-off-by: Duson Lin <dusonlin@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Input: add driver for Elan I2C/SMbus touchpad 2014-10-24T20:54:24+00:00 Duson Lin dusonlin@emc.com.tw 2014-10-03T20:24:27+00:00 6696777c6506fa52b2a0282121195843ed855be6 This driver supports Elan I2C/SMbus touchpads found in some laptops and also in many Chromebooks. Signed-off-by: Duson Lin <dusonlin@emc.com.tw> Reviewed-by: Benson Leung <bleung@chromium.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> 
This driver supports Elan I2C/SMbus touchpads found in some laptops and
also in many Chromebooks.

Signed-off-by: Duson Lin <dusonlin@emc.com.tw>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>