linux-kernel - [PATCH v2 1/2] hwmon: (adt7475) Use device_property APIs when configuring polarity

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Date:   Wed, 19 Apr 2023 11:36:55 +1200
From:   Chris Packham <chris.packham@...iedtelesis.co.nz>
To:     jdelvare@...e.com, linux@...ck-us.net, manio@...boo.net
Cc:     linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chris Packham <chris.packham@...iedtelesis.co.nz>
Subject: [PATCH v2 1/2] hwmon: (adt7475) Use device_property APIs when configuring polarity

On DT unaware platforms of_property_read_u32_array() returns -ENOSYS
which wasn't handled by the code treating adi,pwm-active-state as
optional. Update the code to use device_property_read_u32_array() which
deals gracefully with DT unaware platforms.

Fixes: 86da28eed4fb ("hwmon: (adt7475) Add support for inverting pwm output")
Reported-by: Mariusz Białończyk <manio@...boo.net>
Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
---

Notes:
    I've not currently got access to a DT unaware platform with an ADT7475
    chip so I'm not 100% sure that this will fix the problem Mariusz
    reported but looking at drivers I think this approach is correct.
    
    Changes in v2:
    - use device_property_read_u32_array instead of checking for -ENOSYS

 drivers/hwmon/adt7475.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c
index 6e4c92b500b8..6a6ebcc896b1 100644
--- a/drivers/hwmon/adt7475.c
+++ b/drivers/hwmon/adt7475.c
@@ -1604,9 +1604,9 @@ static int adt7475_set_pwm_polarity(struct i2c_client *client)
 	int ret, i;
 	u8 val;
 
-	ret = of_property_read_u32_array(client->dev.of_node,
-					 "adi,pwm-active-state", states,
-					 ARRAY_SIZE(states));
+	ret = device_property_read_u32_array(&client->dev,
+					     "adi,pwm-active-state", states,
+					     ARRAY_SIZE(states));
 	if (ret)
 		return ret;
 
-- 
2.40.0