[PATCH 1/4] pinctrl: qcom: lpass-lpi: set output value before enabling output

[Krzysztof Kozlowski]

As per Hardware Programming Guide, when configuring pin as output,
set the pin value before setting output-enable (OE).  Similar approach
is in main SoC TLMM pin controller.

Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: 6e261d1090d6 ("pinctrl: qcom: Add sm8250 lpass lpi pinctrl driver")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
---
 drivers/pinctrl/qcom/pinctrl-lpass-lpi.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
index 87920257bb73..27fc8b671954 100644
--- a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
+++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
@@ -221,6 +221,15 @@ static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group,
 		}
 	}
 
+	/*
+	 * As per Hardware Programming Guide, when configuring pin as output,
+	 * set the pin value before setting output-enable (OE).
+	 */
+	if (output_enabled) {
+		val = u32_encode_bits(value ? 1 : 0, LPI_GPIO_VALUE_OUT_MASK);
+		lpi_gpio_write(pctrl, group, LPI_GPIO_VALUE_REG, val);
+	}
+
 	val = lpi_gpio_read(pctrl, group, LPI_GPIO_CFG_REG);
 
 	u32p_replace_bits(&val, pullup, LPI_GPIO_PULL_MASK);
@@ -230,11 +239,6 @@ static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group,
 
 	lpi_gpio_write(pctrl, group, LPI_GPIO_CFG_REG, val);
 
-	if (output_enabled) {
-		val = u32_encode_bits(value ? 1 : 0, LPI_GPIO_VALUE_OUT_MASK);
-		lpi_gpio_write(pctrl, group, LPI_GPIO_VALUE_REG, val);
-	}
-
 	return 0;
 }
 
-- 
2.34.1