linux-kernel - [PATCH v2 34/45] mfd: palmas: Use devm_register_simple_power_off

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Date:   Thu, 28 Oct 2021 00:17:04 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Lee Jones <lee.jones@...aro.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Russell King <linux@...linux.org.uk>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Guo Ren <guoren@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Joshua Thompson <funaho@...ai.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Nick Hu <nickhu@...estech.com>,
        Greentime Hu <green.hu@...il.com>,
        Vincent Chen <deanbo422@...il.com>,
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        Chen-Yu Tsai <wens@...e.org>,
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        Benjamin Fair <benjaminfair@...gle.com>,
        Pavel Machek <pavel@....cz>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
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        linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org
Subject: [PATCH v2 34/45] mfd: palmas: Use devm_register_simple_power_off_handler()

Use devm_register_simple_power_off_handler() that replaces global
pm_power_off variable and allows to register multiple power-off handlers.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/mfd/palmas.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/mfd/palmas.c b/drivers/mfd/palmas.c
index f5b3fa973b13..c7d4d48d2fda 100644
--- a/drivers/mfd/palmas.c
+++ b/drivers/mfd/palmas.c
@@ -14,6 +14,7 @@
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
+#include <linux/reboot.h>
 #include <linux/regmap.h>
 #include <linux/err.h>
 #include <linux/mfd/core.h>
@@ -420,12 +421,12 @@ static void palmas_dt_to_pdata(struct i2c_client *i2c,
 			"ti,system-power-controller");
 }
 
-static struct palmas *palmas_dev;
-static void palmas_power_off(void)
+static void palmas_power_off(void *data)
 {
 	unsigned int addr;
 	int ret, slave;
 	u8 powerhold_mask;
+	struct palmas *palmas_dev = data;
 	struct device_node *np = palmas_dev->dev->of_node;
 
 	if (of_property_read_bool(np, "ti,palmas-override-powerhold")) {
@@ -680,12 +681,16 @@ static int palmas_i2c_probe(struct i2c_client *i2c,
 	 */
 	if (node) {
 		ret = devm_of_platform_populate(&i2c->dev);
-		if (ret < 0) {
+		if (ret < 0)
+			goto err_irq;
+	}
+
+	if (pdata->pm_off) {
+		ret = devm_register_simple_power_off_handler(&i2c->dev,
+							     palmas_power_off,
+							     palmas);
+		if (ret)
 			goto err_irq;
-		} else if (pdata->pm_off && !pm_power_off) {
-			palmas_dev = palmas;
-			pm_power_off = palmas_power_off;
-		}
 	}
 
 	return ret;
@@ -712,11 +717,6 @@ static int palmas_i2c_remove(struct i2c_client *i2c)
 			i2c_unregister_device(palmas->i2c_clients[i]);
 	}
 
-	if (palmas == palmas_dev) {
-		pm_power_off = NULL;
-		palmas_dev = NULL;
-	}
-
 	return 0;
 }
 
-- 
2.33.1