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| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2025-03-29 20:01:32 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-04 14:37:06 +0200 |
| commit | f675deb457e4f772465ae3b8c5e9df9cd4444118 (patch) | |
| tree | 13f9061a7d3eb9ac9ff46f389850054cf464bfbb | |
| parent | effa82980e2931cf552c76a85856402a50018751 (diff) | |
| download | linux-f675deb457e4f772465ae3b8c5e9df9cd4444118.tar.gz linux-f675deb457e4f772465ae3b8c5e9df9cd4444118.tar.bz2 linux-f675deb457e4f772465ae3b8c5e9df9cd4444118.zip | |
pinctrl: meson: define the pull up/down resistor value as 60 kOhm
[ Upstream commit e56088a13708757da68ad035269d69b93ac8c389 ]
The public datasheets of the following Amlogic SoCs describe a typical
resistor value for the built-in pull up/down resistor:
- Meson8/8b/8m2: not documented
- GXBB (S905): 60 kOhm
- GXL (S905X): 60 kOhm
- GXM (S912): 60 kOhm
- G12B (S922X): 60 kOhm
- SM1 (S905D3): 60 kOhm
The public G12B and SM1 datasheets additionally state min and max
values:
- min value: 50 kOhm for both, pull-up and pull-down
- max value for the pull-up: 70 kOhm
- max value for the pull-down: 130 kOhm
Use 60 kOhm in the pinctrl-meson driver as well so it's shown in the
debugfs output. It may not be accurate for Meson8/8b/8m2 but in reality
60 kOhm is closer to the actual value than 1 Ohm.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/20250329190132.855196-1-martin.blumenstingl@googlemail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/pinctrl/meson/pinctrl-meson.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c index 20683cd072bb..ae72edba8a1f 100644 --- a/drivers/pinctrl/meson/pinctrl-meson.c +++ b/drivers/pinctrl/meson/pinctrl-meson.c @@ -483,7 +483,7 @@ static int meson_pinconf_get(struct pinctrl_dev *pcdev, unsigned int pin, case PIN_CONFIG_BIAS_PULL_DOWN: case PIN_CONFIG_BIAS_PULL_UP: if (meson_pinconf_get_pull(pc, pin) == param) - arg = 1; + arg = 60000; else return -EINVAL; break; |