linux-kernel - [PATCH v2] regulator: arizona-ldo1: Add ramp time for HI

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 for Android: free password hash cracker in your pocket

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

Date:	Wed, 25 Mar 2015 09:32:05 +0000
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	broonie@...nel.org
Cc:	lgirdwood@...il.com, linux-kernel@...r.kernel.org,
	patches@...nsource.wolfsonmicro.com
Subject: [PATCH v2] regulator: arizona-ldo1: Add ramp time for HI_PWR

From: Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>

For regulators that support HI_PWR we need to ensure that switching to
1.8v allows time for the regulator to reach that voltage.

Signed-off-by: Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
---

Changes since v1:
 - Don't ever return a zero ramp time

 drivers/regulator/arizona-ldo1.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c
index a1d07d3..9ee2fd6 100644
--- a/drivers/regulator/arizona-ldo1.c
+++ b/drivers/regulator/arizona-ldo1.c
@@ -113,6 +113,14 @@ static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
 	return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT;
 }
 
+static int arizona_ldo1_hc_set_voltage_time_sel(struct regulator_dev *rdev,
+						unsigned int old_selector,
+						unsigned int new_selector)
+{
+	/* Just use worst case switching time for now */
+	return 25;
+}
+
 static struct regulator_ops arizona_ldo1_hc_ops = {
 	.list_voltage = arizona_ldo1_hc_list_voltage,
 	.map_voltage = arizona_ldo1_hc_map_voltage,
@@ -120,6 +128,7 @@ static struct regulator_ops arizona_ldo1_hc_ops = {
 	.set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
 	.get_bypass = regulator_get_bypass_regmap,
 	.set_bypass = regulator_set_bypass_regmap,
+	.set_voltage_time_sel = arizona_ldo1_hc_set_voltage_time_sel,
 };
 
 static const struct regulator_desc arizona_ldo1_hc = {
-- 
1.7.2.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/