This driver enables us to use tps65217's power button as KEY_POWER on
am335x boards (directly connected button in chiliboard, accessible pin
via expansion header in beaglebone). This patch has been tested with
chiliboard.
Signed-off-by: Marcin Niestroj <m.niestroj@xxxxxxxxxxxxxxxx>
---
Depends on patches 1-2 in series and commit
47d7d5ed68d877269003a392b7008905d65650bb
("power_supply: tps65217-charger: Add support for IRQs")
in power-supply's -next branch.
Changes v4 -> v5:
* Add support for tps65217 power button in tps65218-pwrbutton driver
(as suggested by Dmitry)
* Device-tree documentation was combined with tps65218-pwrbutton
Changes v2 -> v4: none
Changes v1 -> v2:
* Added information about parent device in tps65217 power button
device-tree binding documentation (suggested by Rob)
.../bindings/input/tps65218-pwrbutton.txt | 17 +++-
drivers/input/misc/Kconfig | 4 +-
drivers/input/misc/tps65218-pwrbutton.c | 102 +++++++++++++++------
3 files changed, 88 insertions(+), 35 deletions(-)
diff --git a/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt b/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
index e30e0b9..3e5b979 100644
--- a/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
+++ b/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
@@ -1,13 +1,24 @@
-Texas Instruments TPS65218 power button
+Texas Instruments TPS65217 and TPS65218 power button
+
+This module is part of the TPS65217/TPS65218. For more details about the whole
+TPS65217 chip see Documentation/devicetree/bindings/regulator/tps65217.txt.
This driver provides a simple power button event via an Interrupt.
Required properties:
-- compatible: should be "ti,tps65218-pwrbutton"
+- compatible: should be "ti,tps65217-pwrbutton" or "ti,tps65218-pwrbutton"
+
+Required properties for TPS65218:
- interrupts: should be one of the following
- <3 IRQ_TYPE_EDGE_BOTH>: For controllers compatible with tps65218
-Example:
+Examples:
+
+&tps {
+ tps65217-pwrbutton {
+ compatible = "ti,tps65217-pwrbutton";
+ };
+};
&tps {
power-button {
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index efb0ca8..dbd5b75 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -454,10 +454,10 @@ config INPUT_RETU_PWRBUTTON
config INPUT_TPS65218_PWRBUTTON
tristate "TPS65218 Power button driver"
- depends on MFD_TPS65218
+ depends on (MFD_TPS65217 || MFD_TPS65218)
help
Say Y here if you want to enable power buttong reporting for
- the TPS65218 Power Management IC device.
+ TPS65217 and TPS65218 Power Management IC device.
To compile this driver as a module, choose M here. The module will
be called tps65218-pwrbutton.
diff --git a/drivers/input/misc/tps65218-pwrbutton.c b/drivers/input/misc/tps65218-pwrbutton.c
index a39b626..b7964d1 100644
--- a/drivers/input/misc/tps65218-pwrbutton.c
+++ b/drivers/input/misc/tps65218-pwrbutton.c
@@ -1,8 +1,9 @@
/*
- * Texas Instruments' TPS65218 Power Button Input Driver
+ * Texas Instruments' TPS65217 and TPS65218 Power Button Input Driver
*
* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
* Author: Felipe Balbi <balbi@xxxxxx>
+ * Author: Marcin Niestroj <m.niestroj@xxxxxxxxxxxxxxxx>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -18,31 +19,64 @@
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
+#include <linux/mfd/tps65217.h>
#include <linux/mfd/tps65218.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>
#include <linux/slab.h>
-struct tps65218_pwrbutton {
+struct tps6521x_data {
+ size_t regmap_offset;
+ unsigned int reg_status;
+ unsigned int pb_mask;
+ const char *name;
+};
+
+static const struct tps6521x_data tps65217_data = {
+ .regmap_offset = offsetof(struct tps65217, regmap),
+ .reg_status = TPS65217_REG_STATUS,
+ .pb_mask = TPS65217_STATUS_PB,
+ .name = "tps65217_pwrbutton",
+};
+
+static const struct tps6521x_data tps65218_data = {
+ .regmap_offset = offsetof(struct tps65218, regmap),
+ .reg_status = TPS65218_REG_STATUS,
+ .pb_mask = TPS65218_STATUS_PB_STATE,
+ .name = "tps65218_pwrbutton",
+};
+
+struct tps6521x_pwrbutton {
struct device *dev;
- struct tps65218 *tps;
+ struct regmap *regmap;
struct input_dev *idev;
+ const struct tps6521x_data *data;
+ char phys[32];
+};
+
+static const struct of_device_id of_tps6521x_pb_match[] = {
+ { .compatible = "ti,tps65217-pwrbutton", .data = &tps65217_data },
+ { .compatible = "ti,tps65218-pwrbutton", .data = &tps65218_data },
+ { },
};
+MODULE_DEVICE_TABLE(of, of_tps6521x_pb_match);
-static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr)
+static irqreturn_t tps6521x_pb_irq(int irq, void *_pwr)
{
- struct tps65218_pwrbutton *pwr = _pwr;
+ struct tps6521x_pwrbutton *pwr = _pwr;
+ const struct tps6521x_data *tps_data = pwr->data;
unsigned int reg;
int error;
- error = tps65218_reg_read(pwr->tps, TPS65218_REG_STATUS, ®);
+ error = regmap_read(pwr->regmap, tps_data->reg_status, ®);
if (error) {
dev_err(pwr->dev, "can't read register: %d\n", error);
goto out;
}
- if (reg & TPS65218_STATUS_PB_STATE) {
+ if (reg & tps_data->pb_mask) {
input_report_key(pwr->idev, KEY_POWER, 1);
pm_wakeup_event(pwr->dev, 0);
} else {
@@ -55,42 +89,56 @@ out:
return IRQ_HANDLED;
}
-static int tps65218_pwron_probe(struct platform_device *pdev)
+static int tps6521x_pb_probe(struct platform_device *pdev)
{
- struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
+ void *tps = dev_get_drvdata(pdev->dev.parent);
struct device *dev = &pdev->dev;
- struct tps65218_pwrbutton *pwr;
+ struct tps6521x_pwrbutton *pwr;
struct input_dev *idev;
+ const struct of_device_id *match;
int error;
int irq;
+ match = of_match_node(of_tps6521x_pb_match, pdev->dev.of_node);
+ if (!match)
+ return -ENXIO;
+
pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL);
if (!pwr)
return -ENOMEM;
+ pwr->data = match->data;
+
idev = devm_input_allocate_device(dev);
if (!idev)
return -ENOMEM;
- idev->name = "tps65218_pwrbutton";
- idev->phys = "tps65218_pwrbutton/input0";
+ idev->name = pwr->data->name;
+ snprintf(pwr->phys, sizeof(pwr->phys), "%s/input0",
+ pwr->data->name);
+ idev->phys = pwr->phys;
idev->dev.parent = dev;
idev->id.bustype = BUS_I2C;
input_set_capability(idev, EV_KEY, KEY_POWER);
- pwr->tps = tps;
+ pwr->regmap = *(struct regmap **) (tps + pwr->data->regmap_offset);
pwr->dev = dev;
pwr->idev = idev;
platform_set_drvdata(pdev, pwr);
device_init_wakeup(dev, true);
irq = platform_get_irq(pdev, 0);
- error = devm_request_threaded_irq(dev, irq, NULL, tps65218_pwr_irq,
- IRQF_TRIGGER_RISING |
- IRQF_TRIGGER_FALLING |
- IRQF_ONESHOT,
- "tps65218-pwrbutton", pwr);
+ if (irq < 0) {
+ dev_err(dev, "No IRQ resource!\n");
+ return -EINVAL;
+ }
+
+ error = devm_request_threaded_irq(dev, irq, NULL, tps6521x_pb_irq,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ pwr->data->name, pwr);
if (error) {
dev_err(dev, "failed to request IRQ #%d: %d\n",
irq, error);
@@ -106,21 +154,15 @@ static int tps65218_pwron_probe(struct platform_device *pdev)
return 0;
}
-static const struct of_device_id of_tps65218_pwr_match[] = {
- { .compatible = "ti,tps65218-pwrbutton" },
- { },
-};
-MODULE_DEVICE_TABLE(of, of_tps65218_pwr_match);
-
-static struct platform_driver tps65218_pwron_driver = {
- .probe = tps65218_pwron_probe,
+static struct platform_driver tps6521x_pb_driver = {
+ .probe = tps6521x_pb_probe,
.driver = {
- .name = "tps65218_pwrbutton",
- .of_match_table = of_tps65218_pwr_match,
+ .name = "tps6521x_pwrbutton",
+ .of_match_table = of_tps6521x_pb_match,
},
};
-module_platform_driver(tps65218_pwron_driver);
+module_platform_driver(tps6521x_pb_driver);
-MODULE_DESCRIPTION("TPS65218 Power Button");
+MODULE_DESCRIPTION("TPS6521X Power Button");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Felipe Balbi <balbi@xxxxxx>");
--
2.9.3
--
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