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From: Jonathan Marek <jonathan@marek.ca>
To: linux-arm-msm@vger.kernel.org
Cc: Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Linus Walleij <linus.walleij@linaro.org>,
	Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
	linux-gpio@vger.kernel.org (open list:PIN CONTROL SUBSYSTEM),
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] pinctrl: qcom: lpass lpi: use default pullup/strength values
Date: Thu,  4 Mar 2021 14:48:16 -0500
Message-ID: <20210304194816.3843-1-jonathan@marek.ca> (raw)

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.

Fixes: 6e261d1090d6 ("pinctrl: qcom: Add sm8250 lpass lpi pinctrl driver")
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
---
 drivers/pinctrl/qcom/pinctrl-lpass-lpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
index 369ee20a7ea95..2f19ab4db7208 100644
--- 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;
-- 
2.26.1


             reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-04 19:48 Jonathan Marek [this message]
2021-03-05  0:05 ` Bjorn Andersson
2021-03-05  0:21   ` Jonathan Marek
2021-03-05 13:10 ` Srinivas Kandagatla
2021-03-10 23:13 ` Linus Walleij

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