forked from Minki/linux
59a18c24ba
I was debugging some gpio issues and I thought that the output of gpio debugfs was telling me the high or low level of the gpios with a '1' or a '0'. We saw a line like this though: gpio93 : in 4 2mA pull down and I started to think that there may be a gas leak in the building because '4' doesn't mean high or low, and other pins said '0' or '1'. It turns out, '4' is the function selection for the pinmux of the gpio and not the value on the pin. Reading code helps decipher what debugfs is actually saying. Add support to read the input or output pin depending on how the pin is configured so we can easily see the high or low value of the pin in debugfs. Now the output looks like gpio93 : in low func4 2mA pull down which clearly shows that the pin is an input, low, with function 4 and a 2mA drive strength plus a pull down. Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Alexandru M Stan <amstan@chromium.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> |
||
|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| pinctrl-apq8064.c | ||
| pinctrl-apq8084.c | ||
| pinctrl-ipq4019.c | ||
| pinctrl-ipq8064.c | ||
| pinctrl-ipq8074.c | ||
| pinctrl-mdm9615.c | ||
| pinctrl-msm8x74.c | ||
| pinctrl-msm8660.c | ||
| pinctrl-msm8916.c | ||
| pinctrl-msm8960.c | ||
| pinctrl-msm8994.c | ||
| pinctrl-msm8996.c | ||
| pinctrl-msm8998.c | ||
| pinctrl-msm.c | ||
| pinctrl-msm.h | ||
| pinctrl-qdf2xxx.c | ||
| pinctrl-sdm845.c | ||
| pinctrl-spmi-gpio.c | ||
| pinctrl-spmi-mpp.c | ||
| pinctrl-ssbi-gpio.c | ||
| pinctrl-ssbi-mpp.c | ||