linux-kernel - [PATCH 1/1] mfd: palmas: Add power off control

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:	Tue, 30 Jul 2013 05:05:57 -0700
From:	Bill Huang <bilhuang@...dia.com>
To:	<sameo@...ux.intel.com>
CC:	<rob.herring@...xeda.com>, <pawel.moll@....com>,
	<mark.rutland@....com>, <swarren@...dotorg.org>,
	<ian.campbell@...rix.com>, <rob@...dley.net>,
	<lee.jones@...aro.org>, <broonie@...aro.org>, <nm@...com>,
	<j-keerthy@...com>, <grant.likely@...aro.org>,
	<ian@...mlogic.co.uk>, <devicetree@...r.kernel.org>,
	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Bill Huang <bilhuang@...dia.com>,
	Mallikarjun Kasoju <mkasoju@...dia.com>
Subject: [PATCH 1/1] mfd: palmas: Add power off control

Hook up "pm_power_off" to palmas power off routine if there is DT
property "ti,system-power-controller" defined, so platform which is
powered by this regulator can be powered off properly.

Based on work by:
Mallikarjun Kasoju <mkasoju@...dia.com>

Signed-off-by: Bill Huang <bilhuang@...dia.com>
cc: Mallikarjun Kasoju <mkasoju@...dia.com>
---
 .../devicetree/bindings/regulator/palmas-pmic.txt  |    5 +++++
 drivers/mfd/palmas.c                               |   23 ++++++++++++++++++--
 include/linux/mfd/palmas.h                         |    1 +
 3 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/regulator/palmas-pmic.txt b/Documentation/devicetree/bindings/regulator/palmas-pmic.txt
index 30b0581..4adca2a 100644
--- a/Documentation/devicetree/bindings/regulator/palmas-pmic.txt
+++ b/Documentation/devicetree/bindings/regulator/palmas-pmic.txt
@@ -36,6 +36,9 @@ Optional nodes:
 	       ti,smps-range - OTP has the wrong range set for the hardware so override
 	       0 - low range, 1 - high range.
 
+- ti,system-power-controller: Telling whether or not this pmic is controlling
+			      the system power.
+
 Example:
 
 #include <dt-bindings/interrupt-controller/irq.h>
@@ -48,6 +51,8 @@ pmic {
 
 	ti,ldo6-vibrator;
 
+	ti,system-power-controller;
+
 	regulators {
 		smps12_reg : smps12 {
 			regulator-name = "smps12";
diff --git a/drivers/mfd/palmas.c b/drivers/mfd/palmas.c
index e4d1c70..0662b21 100644
--- a/drivers/mfd/palmas.c
+++ b/drivers/mfd/palmas.c
@@ -229,6 +229,22 @@ static void palmas_dt_to_pdata(struct i2c_client *i2c,
 					PALMAS_POWER_CTRL_ENABLE2_MASK;
 	if (i2c->irq)
 		palmas_set_pdata_irq_flag(i2c, pdata);
+
+	pdata->pm_off = of_property_read_bool(node,
+			"ti,system-power-controller");
+}
+
+static struct palmas *palmas_dev;
+static void palmas_power_off(void)
+{
+	unsigned int addr;
+
+	if (!palmas_dev)
+		return;
+
+	addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_DEV_CTRL);
+
+	regmap_update_bits(palmas_dev->regmap[0], addr, 1, 0);
 }
 
 static unsigned int palmas_features = PALMAS_PMIC_FEATURE_SMPS10_BOOST;
@@ -423,10 +439,13 @@ no_irq:
 	 */
 	if (node) {
 		ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
-		if (ret < 0)
+		if (ret < 0) {
 			goto err_irq;
-		else
+		} else if (pdata->pm_off && !pm_power_off) {
+			palmas_dev = palmas;
+			pm_power_off = palmas_power_off;
 			return ret;
+		}
 	}
 
 	return ret;
diff --git a/include/linux/mfd/palmas.h b/include/linux/mfd/palmas.h
index 1a8dd7a..061cce0 100644
--- a/include/linux/mfd/palmas.h
+++ b/include/linux/mfd/palmas.h
@@ -258,6 +258,7 @@ struct palmas_platform_data {
 	 */
 	int mux_from_pdata;
 	u8 pad1, pad2;
+	bool pm_off;
 
 	struct palmas_pmic_platform_data *pmic_pdata;
 	struct palmas_gpadc_platform_data *gpadc_pdata;
-- 
1.7.9.5

--
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/