[U-Boot] [PATCH] regulator: pwm: Fix handling of missing init voltage

[Mark Kettenis]

Since priv->init_voltage is an unsigned integer it can never be
negative.  So the current code fails to detect a missing
'regulator-init-microvolt' property and instead misconfigures the
PWM device.  Fix this by making the relevant members of
'struct pwm_regulator_info' signed integers.

Signed-off-by: Mark Kettenis <kettenis at openbsd.org>
---

The current device tree for the Firefly-RK3399 does not have a
'regulator-init-microvolt' property for the 'vdd-log' regulator.
Without this fix U-Boot configures a voltage that is too low which
causes the Ethernet interface to drop almost all packets.

 drivers/power/regulator/pwm_regulator.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/power/regulator/pwm_regulator.c b/drivers/power/regulator/pwm_regulator.c
index a6c9fccd68..00a7cca7f7 100644
--- a/drivers/power/regulator/pwm_regulator.c
+++ b/drivers/power/regulator/pwm_regulator.c
@@ -32,13 +32,13 @@ struct pwm_regulator_info {
 	bool polarity;
 	struct udevice *pwm;
 	/* initialize voltage of regulator */
-	unsigned int init_voltage;
+	int init_voltage;
 	/* the maximum voltage of regulator */
-	unsigned int max_voltage;
+	int max_voltage;
 	/* the minimum voltage of regulator */
-	unsigned int min_voltage;
+	int min_voltage;
 	/* the current voltage of regulator */
-	unsigned int volt_uV;
+	int volt_uV;
 };
 
 static int pwm_regulator_enable(struct udevice *dev, bool enable)
-- 
2.13.0