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Message-ID: <1375185957-28212-1-git-send-email-bilhuang@nvidia.com>
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
--
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