linux-kernel - [PATCH] regulator: arizona-ldo1: Mark as always-on if no LDOENA

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 21 Apr 2016 13:02:02 +0100
From:	Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
To:	<broonie@...nel.org>
CC:	<lgirdwood@...il.com>, <linux-kernel@...r.kernel.org>,
	<patches@...nsource.wolfsonmicro.com>
Subject: [PATCH] regulator: arizona-ldo1: Mark as always-on if no LDOENA

If we don't have a GPIO for LDOENA it's impossible to turn
the LDO1 regulator off so mark it as always-on.

Signed-off-by: Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
---
 drivers/regulator/arizona-ldo1.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c
index f7c88ff..cc62ea2 100644
--- a/drivers/regulator/arizona-ldo1.c
+++ b/drivers/regulator/arizona-ldo1.c
@@ -290,9 +290,9 @@ static int arizona_ldo1_probe(struct platform_device *pdev)
 	config.ena_gpio = arizona->pdata.ldoena;
 
 	if (arizona->pdata.ldo1)
-		config.init_data = arizona->pdata.ldo1;
-	else
-		config.init_data = &ldo1->init_data;
+		ldo1->init_data = *arizona->pdata.ldo1;
+
+	config.init_data = &ldo1->init_data;
 
 	/*
 	 * LDO1 can only be used to supply DCVDD so if it has no
@@ -301,6 +301,13 @@ static int arizona_ldo1_probe(struct platform_device *pdev)
 	if (config.init_data->num_consumer_supplies == 0)
 		arizona->external_dcvdd = true;
 
+	if (!arizona->external_dcvdd && (config.ena_gpio == 0) &&
+	    !config.ena_gpio_initialized) {
+		dev_warn(arizona->dev,
+			 "No LDOENA: regulator will be always-on\n");
+		ldo1->init_data.constraints.always_on = true;
+	}
+
 	ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);
 
 	of_node_put(config.of_node);
-- 
1.9.1