pinctrl: qcom: lpass lpi: use default pullup/strength values

BugLink: https://bugs.launchpad.net/bugs/1923069
commit 2a9be38099e338f597c14d3cb851849b01db05f6 upstream.

If these fields are not set in dts, the driver will use these variables
uninitialized to set the fields. Not only will it set garbage values for
these fields, but it can overflow into other fields and break those.

In the current sm8250 dts, the dmic01 entries do not have a pullup setting,
and might not work without this change.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 6e261d1090d6 ("pinctrl: qcom: Add sm8250 lpass lpi pinctrl driver")
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210304194816.3843-1-jonathan@marek.ca
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>

diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
index 369ee20a7ea950c24d28bf71c0e29076ea5fd136..2f19ab4db720834cdc29f15f4421ec776c9a6159 100644 (file)
--- a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
+++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
@@ -392,7 +392,7 @@ static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group,
                          unsigned long *configs, unsigned int nconfs)
 {
        struct lpi_pinctrl *pctrl = dev_get_drvdata(pctldev->dev);
-       unsigned int param, arg, pullup, strength;
+       unsigned int param, arg, pullup = LPI_GPIO_BIAS_DISABLE, strength = 2;
        bool value, output_enabled = false;
        const struct lpi_pingroup *g;
        unsigned long sval;