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| author | Stephan Gerhold <stephan@gerhold.net> | 2019-11-25 20:04:25 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-12-09 16:45:01 +0300 |
| commit | fae284f1bc773c9297d337b94cf0aca3593d9842 (patch) | |
| tree | 4a67f2046a5408041c6579f1b5c5c0f79232b9f8 /arch/arm/boot/dts/ste-snowball.dts | |
| parent | 96b619e3c1dfd7464652265d17ee8c07ef5cca92 (diff) | |
| download | linux-fae284f1bc773c9297d337b94cf0aca3593d9842.tar.xz | |
ARM: dts: ux500: Disable I2C/SPI buses by default
At the moment, all 5 I2C and 6 SPI buses are probed and exposed
to user-space by default - even if they are not muxed to any pins
on the board. This means that user-space sees an I2C/SPI bus that
cannot be actually used properly.
In some cases this was used to put the corresponding pins into
a low power sleep mode - but even then the pins first need to be
configured by the board-specific device tree part.
Avoid exposing unconfigured devices to user-space by disabling
the I2C/SPI buses by default. Enable them in the board device trees
when needed.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20191125170428.76069-1-stephan@gerhold.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/arm/boot/dts/ste-snowball.dts')
| -rw-r--r-- | arch/arm/boot/dts/ste-snowball.dts | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/ste-snowball.dts b/arch/arm/boot/dts/ste-snowball.dts index 8b80dcdf6e5b..ce136412b6da 100644 --- a/arch/arm/boot/dts/ste-snowball.dts +++ b/arch/arm/boot/dts/ste-snowball.dts @@ -307,18 +307,21 @@ pinctrl-names = "default","sleep"; pinctrl-0 = <&i2c0_a_1_default>; pinctrl-1 = <&i2c0_a_1_sleep>; + status = "okay"; }; i2c@80122000 { pinctrl-names = "default","sleep"; pinctrl-0 = <&i2c1_b_2_default>; pinctrl-1 = <&i2c1_b_2_sleep>; + status = "okay"; }; i2c@80128000 { pinctrl-names = "default","sleep"; pinctrl-0 = <&i2c2_b_2_default>; pinctrl-1 = <&i2c2_b_2_sleep>; + status = "okay"; lsm303dlh@18 { /* Accelerometer */ compatible = "st,lsm303dlh-accel"; @@ -369,11 +372,13 @@ pinctrl-names = "default","sleep"; pinctrl-0 = <&i2c3_c_2_default>; pinctrl-1 = <&i2c3_c_2_sleep>; + status = "okay"; }; spi@80002000 { pinctrl-names = "default"; pinctrl-0 = <&ssp0_snowball_mode>; + status = "okay"; }; prcmu@80157000 { |