<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux-stable.git/Documentation/devicetree/bindings/input, branch v6.4</title>
<subtitle>Linux kernel stable tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/'/>
<entry>
<title>Merge tag 'input-for-v6.4-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input</title>
<updated>2023-05-02T00:18:56+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2023-05-02T00:18:56+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=865fdb08197e657c59e74a35fa32362b12397f58'/>
<id>865fdb08197e657c59e74a35fa32362b12397f58</id>
<content type='text'>
Pull input updates from Dmitry Torokhov:

 - a new driver for Novatek touch controllers

 - a new driver for power button for NXP BBNSM

 - a skeleton KUnit tests for the input core

 - improvements to Xpad game controller driver to support more devices

 - improvements to edt-ft5x06, hideep and other drivers

* tag 'input-for-v6.4-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (42 commits)
  Revert "Input: xpad - fix support for some third-party controllers"
  dt-bindings: input: pwm-beeper: convert to dt schema
  Input: xpad - fix PowerA EnWired Controller guide button
  Input: xpad - add constants for GIP interface numbers
  Input: synaptics-rmi4 - fix function name in kerneldoc
  Input: raspberrypi-ts - fix refcount leak in rpi_ts_probe
  Input: edt-ft5x06 - select REGMAP_I2C
  Input: melfas_mip4 - report palm touches
  Input: cma3000_d0x - remove unneeded code
  Input: edt-ft5x06 - calculate points data length only once
  Input: edt-ft5x06 - unify the crc check
  Input: edt-ft5x06 - convert to use regmap API
  Input: edt-ft5x06 - don't print error messages with dev_dbg()
  Input: edt-ft5x06 - remove code duplication
  Input: edt-ft5x06 - don't recalculate the CRC
  Input: edt-ft5x06 - add spaces to ensure format specification
  Input: edt-ft5x06 - remove unnecessary blank lines
  Input: edt-ft5x06 - fix indentation
  Input: tsc2007 - enable cansleep pendown GPIO
  Input: Add KUnit tests for some of the input core helper functions
  ...
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull input updates from Dmitry Torokhov:

 - a new driver for Novatek touch controllers

 - a new driver for power button for NXP BBNSM

 - a skeleton KUnit tests for the input core

 - improvements to Xpad game controller driver to support more devices

 - improvements to edt-ft5x06, hideep and other drivers

* tag 'input-for-v6.4-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (42 commits)
  Revert "Input: xpad - fix support for some third-party controllers"
  dt-bindings: input: pwm-beeper: convert to dt schema
  Input: xpad - fix PowerA EnWired Controller guide button
  Input: xpad - add constants for GIP interface numbers
  Input: synaptics-rmi4 - fix function name in kerneldoc
  Input: raspberrypi-ts - fix refcount leak in rpi_ts_probe
  Input: edt-ft5x06 - select REGMAP_I2C
  Input: melfas_mip4 - report palm touches
  Input: cma3000_d0x - remove unneeded code
  Input: edt-ft5x06 - calculate points data length only once
  Input: edt-ft5x06 - unify the crc check
  Input: edt-ft5x06 - convert to use regmap API
  Input: edt-ft5x06 - don't print error messages with dev_dbg()
  Input: edt-ft5x06 - remove code duplication
  Input: edt-ft5x06 - don't recalculate the CRC
  Input: edt-ft5x06 - add spaces to ensure format specification
  Input: edt-ft5x06 - remove unnecessary blank lines
  Input: edt-ft5x06 - fix indentation
  Input: tsc2007 - enable cansleep pendown GPIO
  Input: Add KUnit tests for some of the input core helper functions
  ...
</pre>
</div>
</content>
</entry>
<entry>
<title>dt-bindings: input: pwm-beeper: convert to dt schema</title>
<updated>2023-04-14T07:08:40+00:00</updated>
<author>
<name>Peng Fan</name>
<email>peng.fan@nxp.com</email>
</author>
<published>2023-04-14T06:35:26+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=c55d84fb2bd89fe2ad56768ead90eb1050581d29'/>
<id>c55d84fb2bd89fe2ad56768ead90eb1050581d29</id>
<content type='text'>
Convert the binding doc to dt schema, and also fixed the
example from fixed-regulator to regulator-fixed.

Signed-off-by: Peng Fan &lt;peng.fan@nxp.com&gt;
Reviewed-by: Rob Herring &lt;robh@kernel.org&gt;
Link: https://lore.kernel.org/r/20230407075259.1593739-1-peng.fan@oss.nxp.com
Signed-off-by: Dmitry Torokhov &lt;dmitry.torokhov@gmail.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Convert the binding doc to dt schema, and also fixed the
example from fixed-regulator to regulator-fixed.

Signed-off-by: Peng Fan &lt;peng.fan@nxp.com&gt;
Reviewed-by: Rob Herring &lt;robh@kernel.org&gt;
Link: https://lore.kernel.org/r/20230407075259.1593739-1-peng.fan@oss.nxp.com
Signed-off-by: Dmitry Torokhov &lt;dmitry.torokhov@gmail.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>dt-bindings: input: Drop unneeded quotes</title>
<updated>2023-04-04T17:12:12+00:00</updated>
<author>
<name>Rob Herring</name>
<email>robh@kernel.org</email>
</author>
<published>2023-03-20T23:47:18+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=fcb52d7deafe04eb6cc26ff89c0b3c9e3acd849a'/>
<id>fcb52d7deafe04eb6cc26ff89c0b3c9e3acd849a</id>
<content type='text'>
Cleanup bindings dropping unneeded quotes. Once all these are fixed,
checking for this can be enabled in yamllint.

Reviewed-by: Krzysztof Kozlowski &lt;krzysztof.kozlowski@linaro.org&gt;
Reviewed-by: Mattijs Korpershoek &lt;mkorpershoek@baylibre.com&gt; # for mediatek,mt6779-keypad.yaml
Link: https://lore.kernel.org/r/20230320234718.2930154-1-robh@kernel.org
Signed-off-by: Rob Herring &lt;robh@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Cleanup bindings dropping unneeded quotes. Once all these are fixed,
checking for this can be enabled in yamllint.

Reviewed-by: Krzysztof Kozlowski &lt;krzysztof.kozlowski@linaro.org&gt;
Reviewed-by: Mattijs Korpershoek &lt;mkorpershoek@baylibre.com&gt; # for mediatek,mt6779-keypad.yaml
Link: https://lore.kernel.org/r/20230320234718.2930154-1-robh@kernel.org
Signed-off-by: Rob Herring &lt;robh@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>dt-bindings: input: Drop unneeded quotes</title>
<updated>2023-03-24T01:51:14+00:00</updated>
<author>
<name>Rob Herring</name>
<email>robh@kernel.org</email>
</author>
<published>2023-03-21T18:54:15+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=77987b872fcfeaf36b4760fe5d77a0cf9ac7fdbe'/>
<id>77987b872fcfeaf36b4760fe5d77a0cf9ac7fdbe</id>
<content type='text'>
Cleanup bindings dropping unneeded quotes. Once all these are fixed,
checking for this can be enabled in yamllint.

Signed-off-by: Rob Herring &lt;robh@kernel.org&gt;
Reviewed-by: Krzysztof Kozlowski &lt;krzysztof.kozlowski@linaro.org&gt;
Reviewed-by: Mattijs Korpershoek &lt;mkorpershoek@baylibre.com&gt; # for mediatek,mt6779-keypad.yaml
Link: https://lore.kernel.org/r/20230320234718.2930154-1-robh@kernel.org
Signed-off-by: Dmitry Torokhov &lt;dmitry.torokhov@gmail.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Cleanup bindings dropping unneeded quotes. Once all these are fixed,
checking for this can be enabled in yamllint.

Signed-off-by: Rob Herring &lt;robh@kernel.org&gt;
Reviewed-by: Krzysztof Kozlowski &lt;krzysztof.kozlowski@linaro.org&gt;
Reviewed-by: Mattijs Korpershoek &lt;mkorpershoek@baylibre.com&gt; # for mediatek,mt6779-keypad.yaml
Link: https://lore.kernel.org/r/20230320234718.2930154-1-robh@kernel.org
Signed-off-by: Dmitry Torokhov &lt;dmitry.torokhov@gmail.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>dt-bindings: crypto: fsl,sec-v4.0: Convert to DT schema</title>
<updated>2023-03-17T21:31:20+00:00</updated>
<author>
<name>Rob Herring</name>
<email>robh@kernel.org</email>
</author>
<published>2023-02-20T21:33:33+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=0415d5a010d5273afc8b069eedb68cb1250e1b4b'/>
<id>0415d5a010d5273afc8b069eedb68cb1250e1b4b</id>
<content type='text'>
Convert Freescale CAAM/SEC4 binding to DT schema format. The
'fsl,sec-v4.0' and 'fsl,sec-v4.0-mon' parts are independent, so split
them into separate schema files.

Add a bunch of missing compatibles for v5.0, v5.4, etc. Drop unused
'ranges', '#address-cells', and '#size-cells' from fsl,sec-v4.0-mon nodes.

There's one DTB warning for LS1012a which has a 2nd 'reg' entry for
'fsl,sec-v4.0-rtic'. Leaving that as there is no clue as to what it is for.

Reviewed-by: Gaurav Jain &lt;gaurav.jain@nxp.com&gt;
Reviewed-by: Peng Fan &lt;peng.fan@nxp.com&gt;
Link: https://lore.kernel.org/r/20230220213334.353779-1-robh@kernel.org
Signed-off-by: Rob Herring &lt;robh@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Convert Freescale CAAM/SEC4 binding to DT schema format. The
'fsl,sec-v4.0' and 'fsl,sec-v4.0-mon' parts are independent, so split
them into separate schema files.

Add a bunch of missing compatibles for v5.0, v5.4, etc. Drop unused
'ranges', '#address-cells', and '#size-cells' from fsl,sec-v4.0-mon nodes.

There's one DTB warning for LS1012a which has a 2nd 'reg' entry for
'fsl,sec-v4.0-rtic'. Leaving that as there is no clue as to what it is for.

Reviewed-by: Gaurav Jain &lt;gaurav.jain@nxp.com&gt;
Reviewed-by: Peng Fan &lt;peng.fan@nxp.com&gt;
Link: https://lore.kernel.org/r/20230220213334.353779-1-robh@kernel.org
Signed-off-by: Rob Herring &lt;robh@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge tag 'v6.3-rc2' into next</title>
<updated>2023-03-17T11:01:30+00:00</updated>
<author>
<name>Dmitry Torokhov</name>
<email>dmitry.torokhov@gmail.com</email>
</author>
<published>2023-03-17T11:01:30+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=d26a3a6ce7e02f9c056ad992bcd9624735022337'/>
<id>d26a3a6ce7e02f9c056ad992bcd9624735022337</id>
<content type='text'>
Merge with mainline to get of_property_present() and other newer APIs.
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Merge with mainline to get of_property_present() and other newer APIs.
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge tag 'soc-drivers-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc</title>
<updated>2023-02-27T18:04:49+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2023-02-27T18:04:49+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=11c70529983e8136ea1bd5c32e4f9cd14503c644'/>
<id>11c70529983e8136ea1bd5c32e4f9cd14503c644</id>
<content type='text'>
Pull ARM SoC driver updates from Arnd Bergmann:
 "As usual, there are lots of minor driver changes across SoC platforms
  from NXP, Amlogic, AMD Zynq, Mediatek, Qualcomm, Apple and Samsung.
  These usually add support for additional chip variations in existing
  drivers, but also add features or bugfixes.

  The SCMI firmware subsystem gains a unified raw userspace interface
  through debugfs, which can be used for validation purposes.

  Newly added drivers include:

   - New power management drivers for StarFive JH7110, Allwinner D1 and
     Renesas RZ/V2M

   - A driver for Qualcomm battery and power supply status

   - A SoC device driver for identifying Nuvoton WPCM450 chips

   - A regulator coupler driver for Mediatek MT81xxv"

* tag 'soc-drivers-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (165 commits)
  power: supply: Introduce Qualcomm PMIC GLINK power supply
  soc: apple: rtkit: Do not copy the reg state structure to the stack
  soc: sunxi: SUN20I_PPU should depend on PM
  memory: renesas-rpc-if: Remove redundant division of dummy
  soc: qcom: socinfo: Add IDs for IPQ5332 and its variant
  dt-bindings: arm: qcom,ids: Add IDs for IPQ5332 and its variant
  dt-bindings: power: qcom,rpmpd: add RPMH_REGULATOR_LEVEL_LOW_SVS_L1
  firmware: qcom_scm: Move qcom_scm.h to include/linux/firmware/qcom/
  MAINTAINERS: Update qcom CPR maintainer entry
  dt-bindings: firmware: document Qualcomm SM8550 SCM
  dt-bindings: firmware: qcom,scm: add qcom,scm-sa8775p compatible
  soc: qcom: socinfo: Add Soc IDs for IPQ8064 and variants
  dt-bindings: arm: qcom,ids: Add Soc IDs for IPQ8064 and variants
  soc: qcom: socinfo: Add support for new field in revision 17
  soc: qcom: smd-rpm: Add IPQ9574 compatible
  soc: qcom: pmic_glink: remove redundant calculation of svid
  soc: qcom: stats: Populate all subsystem debugfs files
  dt-bindings: soc: qcom,rpmh-rsc: Update to allow for generic nodes
  soc: qcom: pmic_glink: add CONFIG_NET/CONFIG_OF dependencies
  soc: qcom: pmic_glink: Introduce altmode support
  ...
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull ARM SoC driver updates from Arnd Bergmann:
 "As usual, there are lots of minor driver changes across SoC platforms
  from NXP, Amlogic, AMD Zynq, Mediatek, Qualcomm, Apple and Samsung.
  These usually add support for additional chip variations in existing
  drivers, but also add features or bugfixes.

  The SCMI firmware subsystem gains a unified raw userspace interface
  through debugfs, which can be used for validation purposes.

  Newly added drivers include:

   - New power management drivers for StarFive JH7110, Allwinner D1 and
     Renesas RZ/V2M

   - A driver for Qualcomm battery and power supply status

   - A SoC device driver for identifying Nuvoton WPCM450 chips

   - A regulator coupler driver for Mediatek MT81xxv"

* tag 'soc-drivers-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (165 commits)
  power: supply: Introduce Qualcomm PMIC GLINK power supply
  soc: apple: rtkit: Do not copy the reg state structure to the stack
  soc: sunxi: SUN20I_PPU should depend on PM
  memory: renesas-rpc-if: Remove redundant division of dummy
  soc: qcom: socinfo: Add IDs for IPQ5332 and its variant
  dt-bindings: arm: qcom,ids: Add IDs for IPQ5332 and its variant
  dt-bindings: power: qcom,rpmpd: add RPMH_REGULATOR_LEVEL_LOW_SVS_L1
  firmware: qcom_scm: Move qcom_scm.h to include/linux/firmware/qcom/
  MAINTAINERS: Update qcom CPR maintainer entry
  dt-bindings: firmware: document Qualcomm SM8550 SCM
  dt-bindings: firmware: qcom,scm: add qcom,scm-sa8775p compatible
  soc: qcom: socinfo: Add Soc IDs for IPQ8064 and variants
  dt-bindings: arm: qcom,ids: Add Soc IDs for IPQ8064 and variants
  soc: qcom: socinfo: Add support for new field in revision 17
  soc: qcom: smd-rpm: Add IPQ9574 compatible
  soc: qcom: pmic_glink: remove redundant calculation of svid
  soc: qcom: stats: Populate all subsystem debugfs files
  dt-bindings: soc: qcom,rpmh-rsc: Update to allow for generic nodes
  soc: qcom: pmic_glink: add CONFIG_NET/CONFIG_OF dependencies
  soc: qcom: pmic_glink: Introduce altmode support
  ...
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge tag 'input-for-v6.3-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input</title>
<updated>2023-02-25T23:01:32+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2023-02-25T23:01:32+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=60e2bf7d10e9cd5641f4a5183a19058d9a2c8782'/>
<id>60e2bf7d10e9cd5641f4a5183a19058d9a2c8782</id>
<content type='text'>
Pull input updates from Dmitry Torokhov:

 - a set of tweaks to iqs269a touch controller driver

 - a fix for ads7846 driver to properly handle 7845 chip

 - cap11xx driver will support cap1203, cap1293 and cap1298 models

 - xpad driver will support 8BitDo Pro 2 Wired Controller

 - input drivers have been switched to DEFINE_SIMPLE_DEV_PM_OPS() and
   pm_sleep_ptr()

 - other miscellaneous fixes and tweaks

* tag 'input-for-v6.3-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (113 commits)
  dt-bindings: input: iqs626a: Redefine trackpad property types
  Input: iqs626a - drop unused device node references
  dt-bindings: input: touchscreen: st,stmfts: convert to dtschema
  Input: cyttsp5 - fix bitmask for touch buttons
  Input: exc3000 - properly stop timer on shutdown
  Input: synaptics-rmi4 - fix SPI device ID
  Input: cap11xx - add support for cap1203, cap1293 and cap1298
  dt-bindings: input: microchip,cap11xx: add cap1203, cap1293 and cap1298
  Input: pmic8xxx-keypad - fix a Kconfig spelling mistake &amp; hyphenation
  Input: edt-ft5x06 - fix typo in a comment
  Input: tegra-kbc - use devm_platform_get_and_ioremap_resource()
  Input: st-keyscan - use devm_platform_get_and_ioremap_resource()
  Input: spear-keyboard - use devm_platform_get_and_ioremap_resource()
  Input: olpc_apsp - use devm_platform_get_and_ioremap_resource()
  Input: arc_ps2 - use devm_platform_get_and_ioremap_resource()
  Input: apbps2 - use devm_platform_get_and_ioremap_resource()
  Input: altera_ps2 - use devm_platform_get_and_ioremap_resource()
  Input: ads7846 - don't check penirq immediately for 7845
  Input: ads7846 - always set last command to PWRDOWN
  Input: ads7846 - don't report pressure for ads7845
  ...
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull input updates from Dmitry Torokhov:

 - a set of tweaks to iqs269a touch controller driver

 - a fix for ads7846 driver to properly handle 7845 chip

 - cap11xx driver will support cap1203, cap1293 and cap1298 models

 - xpad driver will support 8BitDo Pro 2 Wired Controller

 - input drivers have been switched to DEFINE_SIMPLE_DEV_PM_OPS() and
   pm_sleep_ptr()

 - other miscellaneous fixes and tweaks

* tag 'input-for-v6.3-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (113 commits)
  dt-bindings: input: iqs626a: Redefine trackpad property types
  Input: iqs626a - drop unused device node references
  dt-bindings: input: touchscreen: st,stmfts: convert to dtschema
  Input: cyttsp5 - fix bitmask for touch buttons
  Input: exc3000 - properly stop timer on shutdown
  Input: synaptics-rmi4 - fix SPI device ID
  Input: cap11xx - add support for cap1203, cap1293 and cap1298
  dt-bindings: input: microchip,cap11xx: add cap1203, cap1293 and cap1298
  Input: pmic8xxx-keypad - fix a Kconfig spelling mistake &amp; hyphenation
  Input: edt-ft5x06 - fix typo in a comment
  Input: tegra-kbc - use devm_platform_get_and_ioremap_resource()
  Input: st-keyscan - use devm_platform_get_and_ioremap_resource()
  Input: spear-keyboard - use devm_platform_get_and_ioremap_resource()
  Input: olpc_apsp - use devm_platform_get_and_ioremap_resource()
  Input: arc_ps2 - use devm_platform_get_and_ioremap_resource()
  Input: apbps2 - use devm_platform_get_and_ioremap_resource()
  Input: altera_ps2 - use devm_platform_get_and_ioremap_resource()
  Input: ads7846 - don't check penirq immediately for 7845
  Input: ads7846 - always set last command to PWRDOWN
  Input: ads7846 - don't report pressure for ads7845
  ...
</pre>
</div>
</content>
</entry>
<entry>
<title>dt-bindings: google,cros-ec-keyb: Fix spelling error</title>
<updated>2023-02-21T21:56:38+00:00</updated>
<author>
<name>Linus Walleij</name>
<email>linus.walleij@linaro.org</email>
</author>
<published>2023-02-21T21:25:17+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=c6f3b684c2c4e8d4700fe8c4a173c0a70df6cc14'/>
<id>c6f3b684c2c4e8d4700fe8c4a173c0a70df6cc14</id>
<content type='text'>
The dependency had an obvious spelling error. Fix it.

Signed-off-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Reviewed-by: Krzysztof Kozlowski &lt;krzysztof.kozlowski@linaro.org&gt;
Link: https://lore.kernel.org/r/20230220135531.1987351-1-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov &lt;dmitry.torokhov@gmail.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
The dependency had an obvious spelling error. Fix it.

Signed-off-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Reviewed-by: Krzysztof Kozlowski &lt;krzysztof.kozlowski@linaro.org&gt;
Link: https://lore.kernel.org/r/20230220135531.1987351-1-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov &lt;dmitry.torokhov@gmail.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>dt-bindings: HID: i2c-hid: goodix: Add mainboard-vddio-supply</title>
<updated>2023-02-09T13:44:14+00:00</updated>
<author>
<name>Douglas Anderson</name>
<email>dianders@chromium.org</email>
</author>
<published>2023-02-07T02:48:14+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=1d18c1f3b7d938bdefc44289d137b4e6c7a3d502'/>
<id>1d18c1f3b7d938bdefc44289d137b4e6c7a3d502</id>
<content type='text'>
The goodix i2c-hid bindings currently support two models of
touchscreen: GT7375P and GT7986U. The datasheets of both touchscreens
show the following things:
* The mainboard that the touchscreen is connected to is only expected
  to supply one voltage to the touchscreen: 3.3V.
* The touchscreen, depending on stuffing options, can accept IO to the
  touchscreen as either 3.3V or 1.8V. Presumably this means that the
  touchscreen has its own way internally to make or deal with 1.8V
  signals when it's configured for 1.8V IO.

NOTE: you've got to look very carefully at the datasheet for the
touchscreen to see that the above bullets are true. Specifically, the
datasheet shows a signal called VDDIO and one might think that this is
where a mainboard would provide VDDIO to the touchscreen. Upon closer
inspection, however, a footnote can be found that says "When VDDIO is
left floating, the logic level is 1.8V [...]; when VDDIO is connected
to AVDD, the logic level is AVDD.". Thus the VDDIO pin on the
touchscreen IC is actually a selector and not a pin whre the mainboard
would pass a reference voltage.

The fact that the touchscreen isn't supplied 1.8V by the mainboard
means that when I originally submitted bindings for these touchscreens
I only listed the 3.3V rail in the bindings. It can be noted that the
original bindings and driver were added for sc7180-trogdor boards and
these boards all use 3.3V IO via a level shifter on the mainboard.

It turns out that with sc7280-herobrine-evoker, we've got a bit of a
strange monkey on our hands. Due to some very interesting but
(unfortunately) set-in-stone hardware design, we are doing 1.8V IO to
the touchscreen but we _also_ have some extra buffers on the mainboard
that need to be powered up to make the IO lines work. After much
pondering about this, it seems like the best way to handle this is to
add an optional "mainboard-vddio" rail to the bindings that is used to
power up the buffers. Specifically, the fact that the touchscreen
datasheet documents that its IOs can be at a different voltage level
than its main power rail means that there truly are two voltage rails
associated with the touchscreen, even if we don't actually provide the
IO rail to it. Thus it doesn't feel absurd for the DT node on the host
to have a 1.8V rail to power up anything related to its 1.8V logic.

Signed-off-by: Douglas Anderson &lt;dianders@chromium.org&gt;
Reviewed-by: Dmitry Torokhov &lt;dmitry.torokhov@gmail.com&gt;
Acked-by: Rob Herring &lt;robh@kernel.org&gt;
Link: https://lore.kernel.org/r/20230206184744.5.Ia77a96c6c5564f9cc25e6220b5a9171d5c2639e8@changeid
Signed-off-by: Benjamin Tissoires &lt;benjamin.tissoires@redhat.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
The goodix i2c-hid bindings currently support two models of
touchscreen: GT7375P and GT7986U. The datasheets of both touchscreens
show the following things:
* The mainboard that the touchscreen is connected to is only expected
  to supply one voltage to the touchscreen: 3.3V.
* The touchscreen, depending on stuffing options, can accept IO to the
  touchscreen as either 3.3V or 1.8V. Presumably this means that the
  touchscreen has its own way internally to make or deal with 1.8V
  signals when it's configured for 1.8V IO.

NOTE: you've got to look very carefully at the datasheet for the
touchscreen to see that the above bullets are true. Specifically, the
datasheet shows a signal called VDDIO and one might think that this is
where a mainboard would provide VDDIO to the touchscreen. Upon closer
inspection, however, a footnote can be found that says "When VDDIO is
left floating, the logic level is 1.8V [...]; when VDDIO is connected
to AVDD, the logic level is AVDD.". Thus the VDDIO pin on the
touchscreen IC is actually a selector and not a pin whre the mainboard
would pass a reference voltage.

The fact that the touchscreen isn't supplied 1.8V by the mainboard
means that when I originally submitted bindings for these touchscreens
I only listed the 3.3V rail in the bindings. It can be noted that the
original bindings and driver were added for sc7180-trogdor boards and
these boards all use 3.3V IO via a level shifter on the mainboard.

It turns out that with sc7280-herobrine-evoker, we've got a bit of a
strange monkey on our hands. Due to some very interesting but
(unfortunately) set-in-stone hardware design, we are doing 1.8V IO to
the touchscreen but we _also_ have some extra buffers on the mainboard
that need to be powered up to make the IO lines work. After much
pondering about this, it seems like the best way to handle this is to
add an optional "mainboard-vddio" rail to the bindings that is used to
power up the buffers. Specifically, the fact that the touchscreen
datasheet documents that its IOs can be at a different voltage level
than its main power rail means that there truly are two voltage rails
associated with the touchscreen, even if we don't actually provide the
IO rail to it. Thus it doesn't feel absurd for the DT node on the host
to have a 1.8V rail to power up anything related to its 1.8V logic.

Signed-off-by: Douglas Anderson &lt;dianders@chromium.org&gt;
Reviewed-by: Dmitry Torokhov &lt;dmitry.torokhov@gmail.com&gt;
Acked-by: Rob Herring &lt;robh@kernel.org&gt;
Link: https://lore.kernel.org/r/20230206184744.5.Ia77a96c6c5564f9cc25e6220b5a9171d5c2639e8@changeid
Signed-off-by: Benjamin Tissoires &lt;benjamin.tissoires@redhat.com&gt;
</pre>
</div>
</content>
</entry>
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