linux-kernel - [PATCH v2 1/5] hwmon: (sch5627) Use bit macros when accessing the control register

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Message-Id: <20230907052639.16491-2-W_Armin@gmx.de>
Date:   Thu,  7 Sep 2023 07:26:35 +0200
From:   Armin Wolf <W_Armin@....de>
To:     hdegoede@...hat.com
Cc:     jdelvare@...e.com, linux@...ck-us.net, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/5] hwmon: (sch5627) Use bit macros when accessing the control register

Use bit macros then accessing SCH5627_REG_CTRL, so that people
do not need to look at the datasheet to find out what each bit
does.

Tested on a Fujitsu Esprimo P720.

Signed-off-by: Armin Wolf <W_Armin@....de>
---
 drivers/hwmon/sch5627.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/hwmon/sch5627.c b/drivers/hwmon/sch5627.c
index 1bbda3b05532..0eefb8c0aef2 100644
--- a/drivers/hwmon/sch5627.c
+++ b/drivers/hwmon/sch5627.c
@@ -6,6 +6,7 @@

 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

+#include <linux/bits.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/init.h>
@@ -32,6 +33,9 @@
 #define SCH5627_REG_PRIMARY_ID		0x3f
 #define SCH5627_REG_CTRL		0x40

+#define SCH5627_CTRL_START		BIT(0)
+#define SCH5627_CTRL_VBAT		BIT(4)
+
 #define SCH5627_NO_TEMPS		8
 #define SCH5627_NO_FANS			4
 #define SCH5627_NO_IN			5
@@ -147,7 +151,8 @@ static int sch5627_update_in(struct sch5627_data *data)

 	/* Trigger a Vbat voltage measurement every 5 minutes */
 	if (time_after(jiffies, data->last_battery + 300 * HZ)) {
-		sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | 0x10);
+		sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
+					  data->control | SCH5627_CTRL_VBAT);
 		data->last_battery = jiffies;
 	}

@@ -483,14 +488,13 @@ static int sch5627_probe(struct platform_device *pdev)
 		return val;

 	data->control = val;
-	if (!(data->control & 0x01)) {
+	if (!(data->control & SCH5627_CTRL_START)) {
 		pr_err("hardware monitoring not enabled\n");
 		return -ENODEV;
 	}
 	/* Trigger a Vbat voltage measurement, so that we get a valid reading
 	   the first time we read Vbat */
-	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
-				  data->control | 0x10);
+	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | SCH5627_CTRL_VBAT);
 	data->last_battery = jiffies;

 	/*
--
2.39.2