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| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2025-03-29 22:01:32 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2025-04-15 10:47:37 +0300 |
| commit | e56088a13708757da68ad035269d69b93ac8c389 (patch) | |
| tree | 9ef0fd1dc0b90816a98415652a13461ffd9f5169 /drivers/fpga/tests/fpga-bridge-test.c | |
| parent | e64c0ff0d5d85791fbcd126ee558100a06a24a97 (diff) | |
| download | linux-e56088a13708757da68ad035269d69b93ac8c389.tar.xz | |
pinctrl: meson: define the pull up/down resistor value as 60 kOhm
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>
Diffstat (limited to 'drivers/fpga/tests/fpga-bridge-test.c')
0 files changed, 0 insertions, 0 deletions