i2c: mux: gpio: Add support for the 'settle-time-us' property

Some hardware need some time to switch from a bus to another. This can
cause the first transfers following the selection of a bus to fai

i2c: mux: gpio: Add support for the 'settle-time-us' property

Some hardware need some time to switch from a bus to another. This can
cause the first transfers following the selection of a bus to fail.
There is no way to configure this kind of waiting time in the driver.

Add support for the 'settle-time-us' device-tree property. When set,
the i2c_mux_gpio_select() applies a delay before returning, leaving
enough time to the hardware to switch to the new bus.

Signed-off-by: Bastien Curutchet <[email protected]>
Reviewed-by: Andi Shyti <[email protected]>
Acked-by: Peter Rosin <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: mux: gpio: remove support for class-based device instantiation

i801 as only user of gpio i2c mux removed support for class-based device
instantiation on muxed busses. Class-based device instant

i2c: mux: gpio: remove support for class-based device instantiation

i801 as only user of gpio i2c mux removed support for class-based device
instantiation on muxed busses. Class-based device instantiation is a
legacy mechanism and shouldn't be used in new code, therefore remove
support also here.

Signed-off-by: Heiner Kallweit <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: mux/i801: Switch to use descriptor passing

This switches the i801 GPIO mux to use GPIO descriptors for
handling the GPIO lines. The previous hack which was reaching
inside the GPIO chips etc ca

i2c: mux/i801: Switch to use descriptor passing

This switches the i801 GPIO mux to use GPIO descriptors for
handling the GPIO lines. The previous hack which was reaching
inside the GPIO chips etc cannot live on. We pass descriptors
along with the GPIO mux device at creation instead.

The GPIO mux was only used by way of platform data with a
platform device from one place in the kernel: the i801 i2c bus
driver. Let's just associate the GPIO descriptor table with
the actual device like everyone else and dynamically create
a descriptor table passed along with the GPIO i2c mux.

This enables simplification of the GPIO i2c mux driver to
use only the descriptor API and the OF probe path gets
simplified in the process.

The i801 driver was registering the GPIO i2c mux with
PLATFORM_DEVID_AUTO which would make it hard to predict the
device name and assign the descriptor table properly, but
this seems to be a mistake to begin with: all of the
GPIO mux devices are hardcoded to look up GPIO lines from
the "gpio_ich" GPIO chip. If there are more than one mux,
there is certainly more than one gpio chip as well, and
then we have more serious problems. Switch to
PLATFORM_DEVID_NONE instead. There can be only one.

Cc: Mika Westerberg <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Peter Rosin <[email protected]>
Cc: Jean Delvare <[email protected]>
Signed-off-by: Serge Semin <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Reviewed-by: Mika Westerberg <[email protected]>
[Removed a newline, suggested by Andy. /Peter]
Signed-off-by: Peter Rosin <[email protected]>

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

Based on 2 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of th

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

Based on 2 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Enrico Weigelt <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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i2c: mux: gpio: move header to platform_data

This header only contains platform_data. Move it to the proper directory.

Signed-off-by: Wolfram Sang <[email protected]>
Acked-by: Peter Korsgaard <pet

i2c: mux: gpio: move header to platform_data

This header only contains platform_data. Move it to the proper directory.

Signed-off-by: Wolfram Sang <[email protected]>
Acked-by: Peter Korsgaard <[email protected]>

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