linux-kernel - [PATCH v4 3/4] mfd: tps6586x: use devm-based power off handler

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Message-Id: <20230327-tegra-pmic-reboot-v4-3-b24af219fb47@skidata.com>
Date:   Thu, 13 Apr 2023 09:46:41 +0200
From:   Benjamin Bara <bbara93@...il.com>
To:     Wolfram Sang <wsa@...nel.org>, Lee Jones <lee@...nel.org>,
        rafael.j.wysocki@...el.com
Cc:     dmitry.osipenko@...labora.com, peterz@...radead.org,
        jonathanh@...dia.com, richard.leitner@...ux.dev,
        treding@...dia.com, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-tegra@...r.kernel.org,
        Benjamin Bara <benjamin.bara@...data.com>
Subject: [PATCH v4 3/4] mfd: tps6586x: use devm-based power off handler

From: Benjamin Bara <benjamin.bara@...data.com>

Convert the power off handler to a devm-based power off handler.

Reviewed-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
Signed-off-by: Benjamin Bara <benjamin.bara@...data.com>
---
 drivers/mfd/tps6586x.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c
index 2d947f3f606a..93f1bf440191 100644
--- a/drivers/mfd/tps6586x.c
+++ b/drivers/mfd/tps6586x.c
@@ -22,6 +22,7 @@
 #include <linux/err.h>
 #include <linux/i2c.h>
 #include <linux/platform_device.h>
+#include <linux/reboot.h>
 #include <linux/regmap.h>
 #include <linux/of.h>
 
@@ -457,13 +458,16 @@ static const struct regmap_config tps6586x_regmap_config = {
 	.cache_type = REGCACHE_RBTREE,
 };
 
-static struct device *tps6586x_dev;
-static void tps6586x_power_off(void)
+static int tps6586x_power_off_handler(struct sys_off_data *data)
 {
-	if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
-		return;
+	struct device *tps6586x_dev = data->cb_data;
+	int ret;
+
+	ret = tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT);
+	if (ret)
+		return ret;
 
-	tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
+	return tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
 }
 
 static void tps6586x_print_version(struct i2c_client *client, int version)
@@ -559,9 +563,13 @@ static int tps6586x_i2c_probe(struct i2c_client *client)
 		goto err_add_devs;
 	}
 
-	if (pdata->pm_off && !pm_power_off) {
-		tps6586x_dev = &client->dev;
-		pm_power_off = tps6586x_power_off;
+	if (pdata->pm_off) {
+		ret = devm_register_power_off_handler(&client->dev, &tps6586x_power_off_handler,
+						      &client->dev);
+		if (ret) {
+			dev_err(&client->dev, "register power off handler failed: %d\n", ret);
+			goto err_add_devs;
+		}
 	}
 
 	return 0;

-- 
2.34.1