linux-kernel - [PATCH v2 2/3] power: supply: rt5033_battery: Fix device tree enumeration

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Date:   Mon, 17 May 2021 12:51:12 +0200
From:   Stephan Gerhold <stephan@...hold.net>
To:     Sebastian Reichel <sre@...nel.org>,
        Lee Jones <lee.jones@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Beomho Seo <beomho.seo@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        ~postmarketos/upstreaming@...ts.sr.ht,
        Stephan Gerhold <stephan@...hold.net>
Subject: [PATCH v2 2/3] power: supply: rt5033_battery: Fix device tree enumeration

The fuel gauge in the RT5033 PMIC has its own I2C bus and interrupt
line. Therefore, it is not actually part of the RT5033 MFD and needs
its own of_match_table to probe properly.

Also, given that it's independent of the MFD, there is actually
no need to make the Kconfig depend on MFD_RT5033. Although the driver
uses the shared <linux/mfd/rt5033.h> header, there is no compile
or runtime dependency on the RT5033 MFD driver.

Cc: Beomho Seo <beomho.seo@...sung.com>
Cc: Chanwoo Choi <cw00.choi@...sung.com>
Fixes: b847dd96e659 ("power: rt5033_battery: Add RT5033 Fuel gauge device driver")
Signed-off-by: Stephan Gerhold <stephan@...hold.net>
---
Changes in v2: Fix stupid typo :(
---
 drivers/power/supply/Kconfig          | 3 ++-
 drivers/power/supply/rt5033_battery.c | 7 +++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index e696364126f1..20a2f93252f9 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -712,7 +712,8 @@ config BATTERY_GOLDFISH
 
 config BATTERY_RT5033
 	tristate "RT5033 fuel gauge support"
-	depends on MFD_RT5033
+	depends on I2C
+	select REGMAP_I2C
 	help
 	  This adds support for battery fuel gauge in Richtek RT5033 PMIC.
 	  The fuelgauge calculates and determines the battery state of charge
diff --git a/drivers/power/supply/rt5033_battery.c b/drivers/power/supply/rt5033_battery.c
index f330452341f0..9ad0afe83d1b 100644
--- a/drivers/power/supply/rt5033_battery.c
+++ b/drivers/power/supply/rt5033_battery.c
@@ -164,9 +164,16 @@ static const struct i2c_device_id rt5033_battery_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, rt5033_battery_id);
 
+static const struct of_device_id rt5033_battery_of_match[] = {
+	{ .compatible = "richtek,rt5033-battery", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, rt5033_battery_of_match);
+
 static struct i2c_driver rt5033_battery_driver = {
 	.driver = {
 		.name = "rt5033-battery",
+		.of_match_table = rt5033_battery_of_match,
 	},
 	.probe = rt5033_battery_probe,
 	.remove = rt5033_battery_remove,
-- 
2.31.1