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| author | Douglas Anderson <dianders@chromium.org> | 2018-07-03 00:59:38 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-07-09 13:14:09 +0200 |
| commit | 05e0c828955c1cab58dd71a04539442e5375d917 (patch) | |
| tree | d0f0f21f2d3a2f578c9c39c28f34d83617f7e551 /drivers/pinctrl/qcom | |
| parent | pinctrl: Document pin_config_group_get() return codes like pin_config_get() (diff) | |
| download | linux-05e0c828955c1cab58dd71a04539442e5375d917.tar.xz linux-05e0c828955c1cab58dd71a04539442e5375d917.zip | |
pinctrl: msm: Fix msm_config_group_get() to be compliant
If you do this on an sdm845 board:
cat /sys/kernel/debug/pinctrl/3400000.pinctrl/pinconf-groups
...it looks like nonsense. For every pin you see listed:
input bias bus hold, input bias disabled, input bias pull down, input bias pull up
That's because msm_config_group_get() isn't complying with the rules
that pinconf_generic_dump_one() expects. Specifically for boolean
parameters (anything with a "struct pin_config_item" where has_arg is
false) the function expects that the function should return its value
not through the "config" parameter but should return "0" if the value
is set and "-EINVAL" if the value isn't set.
Let's fix this.
From a quick sample of other pinctrl drivers, it appears to be
tradition to also return 1 through the config parameter for these
boolean parameters when they exist. I'm not one to knock tradition,
so I'll follow tradition and return 1 in these cases. While I'm at
it, I'll also continue searching for four leaf clovers, kocking on
wood three times, and trying not to break mirrors.
Fixes: f365be092572 ("pinctrl: Add Qualcomm TLMM driver")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/qcom')
| -rw-r--r-- | drivers/pinctrl/qcom/pinctrl-msm.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c index 0e22f52b2a19..2155a30c282b 100644 --- a/drivers/pinctrl/qcom/pinctrl-msm.c +++ b/drivers/pinctrl/qcom/pinctrl-msm.c @@ -250,22 +250,30 @@ static int msm_config_group_get(struct pinctrl_dev *pctldev, /* Convert register value to pinconf value */ switch (param) { case PIN_CONFIG_BIAS_DISABLE: - arg = arg == MSM_NO_PULL; + if (arg != MSM_NO_PULL) + return -EINVAL; + arg = 1; break; case PIN_CONFIG_BIAS_PULL_DOWN: - arg = arg == MSM_PULL_DOWN; + if (arg != MSM_PULL_DOWN) + return -EINVAL; + arg = 1; break; case PIN_CONFIG_BIAS_BUS_HOLD: if (pctrl->soc->pull_no_keeper) return -ENOTSUPP; - arg = arg == MSM_KEEPER; + if (arg != MSM_KEEPER) + return -EINVAL; + arg = 1; break; case PIN_CONFIG_BIAS_PULL_UP: if (pctrl->soc->pull_no_keeper) arg = arg == MSM_PULL_UP_NO_KEEPER; else arg = arg == MSM_PULL_UP; + if (!arg) + return -EINVAL; break; case PIN_CONFIG_DRIVE_STRENGTH: arg = msm_regval_to_drive(arg); |