diff options
| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2025-03-29 20:01:32 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-29 11:03:09 +0200 |
| commit | c134c62b9e97b2bd789e72d6fa89a37a3ab084fe (patch) | |
| tree | 0171b96f3ee8a92a56236c94d6d9a2a7d5db8ce0 | |
| parent | 5863bd44ed2fa27c6bb7b3f2b7bf9450b67e02d2 (diff) | |
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 253a0cc57e39..e5a32a0532ee 100644 --- a/drivers/pinctrl/meson/pinctrl-meson.c +++ b/drivers/pinctrl/meson/pinctrl-meson.c @@ -487,7 +487,7 @@ 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; |