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| author | Marek Behún <marek.behun@nic.cz> | 2021-07-23 19:57:11 +0200 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2021-07-31 09:59:58 +0200 |
| commit | 5534fb4f4833eda4e1a2df1c89a75db72e5e2008 (patch) | |
| tree | 32f96dd1b2ac08a5fe9f24ed00bafaeaf3de63ab /doc | |
| parent | 3d7b93d51c26092010626708ba9adaf9a65a764f (diff) | |
| download | u-boot-5534fb4f4833eda4e1a2df1c89a75db72e5e2008.zip u-boot-5534fb4f4833eda4e1a2df1c89a75db72e5e2008.tar.gz u-boot-5534fb4f4833eda4e1a2df1c89a75db72e5e2008.tar.bz2 | |
arm64: a37xx: pinctrl: Correct PWM pins definitions
The PWM pins on North Bridge on Armada 37xx can be configured into PWM
or GPIO functions. When in PWM function, each pin can also be configured
to drive low on 0 and tri-state on 1 (LED mode).
The current definitions handle this by declaring two pin groups for each
pin:
- group "pwmN" with functions "pwm" and "gpio"
- group "ledN_od" ("od" for open drain) with functions "led" and "gpio"
This is semantically incorrect. The correct definition for each pin
should be one group with three functions: "pwm", "led" and "gpio".
Change the "pwmN" groups to support "led" function.
Remove "ledN_od" groups. This cannot break backwards compatibility with
older device trees: no device tree uses it since there is no PWM driver
for this SOC yet. Also "ledN_od" groups are not even documented.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/device-tree-bindings/pinctrl/marvell,armada-37xx-pinctrl.txt | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/doc/device-tree-bindings/pinctrl/marvell,armada-37xx-pinctrl.txt b/doc/device-tree-bindings/pinctrl/marvell,armada-37xx-pinctrl.txt index 86ec113..3139a99 100644 --- a/doc/device-tree-bindings/pinctrl/marvell,armada-37xx-pinctrl.txt +++ b/doc/device-tree-bindings/pinctrl/marvell,armada-37xx-pinctrl.txt @@ -38,19 +38,19 @@ group emmc_nb group pwm0 - pin 11 (GPIO1-11) - - functions pwm, gpio + - functions pwm, led, gpio group pwm1 - pin 12 - - functions pwm, gpio + - functions pwm, led, gpio group pwm2 - pin 13 - - functions pwm, gpio + - functions pwm, led, gpio group pwm3 - pin 14 - - functions pwm, gpio + - functions pwm, led, gpio group pmic1 - pin 7 |