forked from luck/tmp_suning_uos_patched
Input: tps65218-pwrbutton - add support for tps65217 variant
The power button found in tps65217 device is very similar to the tps65218, so let's enhance the driver to support both variants. 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@grinn-global.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Marcin Niestroj
Dmitry Torokhov
parent
3521a0f05d
commit
722dc54628
@ -1,13 +1,24 @@
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Texas Instruments TPS65218 power button
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Texas Instruments TPS65217 and TPS65218 power button
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This module is part of the TPS65217/TPS65218. For more details about the whole
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TPS65217 chip see Documentation/devicetree/bindings/regulator/tps65217.txt.
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This driver provides a simple power button event via an Interrupt.
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Required properties:
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- compatible: should be "ti,tps65218-pwrbutton"
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- compatible: should be "ti,tps65217-pwrbutton" or "ti,tps65218-pwrbutton"
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Required properties for TPS65218:
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- interrupts: should be one of the following
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- <3 IRQ_TYPE_EDGE_BOTH>: For controllers compatible with tps65218
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Example:
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Examples:
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&tps {
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tps65217-pwrbutton {
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compatible = "ti,tps65217-pwrbutton";
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};
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};
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&tps {
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power-button {
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@ -466,10 +466,10 @@ config INPUT_RETU_PWRBUTTON
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config INPUT_TPS65218_PWRBUTTON
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tristate "TPS65218 Power button driver"
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depends on MFD_TPS65218
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depends on (MFD_TPS65217 || MFD_TPS65218)
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help
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Say Y here if you want to enable power buttong reporting for
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the TPS65218 Power Management IC device.
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TPS65217 and TPS65218 Power Management IC devices.
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To compile this driver as a module, choose M here. The module will
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be called tps65218-pwrbutton.
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@ -1,8 +1,9 @@
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/*
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* Texas Instruments' TPS65218 Power Button Input Driver
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* Texas Instruments' TPS65217 and TPS65218 Power Button Input Driver
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*
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* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Felipe Balbi <balbi@ti.com>
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* Author: Marcin Niestroj <m.niestroj@grinn-global.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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@ -18,31 +19,61 @@
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/tps65217.h>
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#include <linux/mfd/tps65218.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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struct tps65218_pwrbutton {
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struct device *dev;
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struct tps65218 *tps;
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struct input_dev *idev;
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struct tps6521x_data {
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unsigned int reg_status;
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unsigned int pb_mask;
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const char *name;
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};
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static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr)
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static const struct tps6521x_data tps65217_data = {
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.reg_status = TPS65217_REG_STATUS,
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.pb_mask = TPS65217_STATUS_PB,
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.name = "tps65217_pwrbutton",
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};
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static const struct tps6521x_data tps65218_data = {
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.reg_status = TPS65218_REG_STATUS,
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.pb_mask = TPS65218_STATUS_PB_STATE,
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.name = "tps65218_pwrbutton",
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};
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struct tps6521x_pwrbutton {
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struct device *dev;
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struct regmap *regmap;
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struct input_dev *idev;
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const struct tps6521x_data *data;
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char phys[32];
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};
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static const struct of_device_id of_tps6521x_pb_match[] = {
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{ .compatible = "ti,tps65217-pwrbutton", .data = &tps65217_data },
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{ .compatible = "ti,tps65218-pwrbutton", .data = &tps65218_data },
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{ },
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};
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MODULE_DEVICE_TABLE(of, of_tps6521x_pb_match);
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static irqreturn_t tps6521x_pb_irq(int irq, void *_pwr)
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{
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struct tps65218_pwrbutton *pwr = _pwr;
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struct tps6521x_pwrbutton *pwr = _pwr;
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const struct tps6521x_data *tps_data = pwr->data;
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unsigned int reg;
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int error;
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error = tps65218_reg_read(pwr->tps, TPS65218_REG_STATUS, ®);
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error = regmap_read(pwr->regmap, tps_data->reg_status, ®);
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if (error) {
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dev_err(pwr->dev, "can't read register: %d\n", error);
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goto out;
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}
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if (reg & TPS65218_STATUS_PB_STATE) {
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if (reg & tps_data->pb_mask) {
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input_report_key(pwr->idev, KEY_POWER, 1);
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pm_wakeup_event(pwr->dev, 0);
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} else {
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@ -55,42 +86,55 @@ static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr)
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return IRQ_HANDLED;
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}
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static int tps65218_pwron_probe(struct platform_device *pdev)
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static int tps6521x_pb_probe(struct platform_device *pdev)
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{
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struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
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struct device *dev = &pdev->dev;
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struct tps65218_pwrbutton *pwr;
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struct tps6521x_pwrbutton *pwr;
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struct input_dev *idev;
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const struct of_device_id *match;
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int error;
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int irq;
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match = of_match_node(of_tps6521x_pb_match, pdev->dev.of_node);
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if (!match)
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return -ENXIO;
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pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL);
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if (!pwr)
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return -ENOMEM;
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pwr->data = match->data;
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idev = devm_input_allocate_device(dev);
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if (!idev)
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return -ENOMEM;
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idev->name = "tps65218_pwrbutton";
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idev->phys = "tps65218_pwrbutton/input0";
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idev->name = pwr->data->name;
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snprintf(pwr->phys, sizeof(pwr->phys), "%s/input0",
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pwr->data->name);
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idev->phys = pwr->phys;
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idev->dev.parent = dev;
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idev->id.bustype = BUS_I2C;
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input_set_capability(idev, EV_KEY, KEY_POWER);
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pwr->tps = tps;
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pwr->regmap = dev_get_regmap(pdev->dev.parent, NULL);
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pwr->dev = dev;
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pwr->idev = idev;
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platform_set_drvdata(pdev, pwr);
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device_init_wakeup(dev, true);
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irq = platform_get_irq(pdev, 0);
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error = devm_request_threaded_irq(dev, irq, NULL, tps65218_pwr_irq,
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if (irq < 0) {
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dev_err(dev, "No IRQ resource!\n");
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return -EINVAL;
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}
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error = devm_request_threaded_irq(dev, irq, NULL, tps6521x_pb_irq,
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IRQF_TRIGGER_RISING |
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IRQF_TRIGGER_FALLING |
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IRQF_ONESHOT,
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"tps65218-pwrbutton", pwr);
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pwr->data->name, pwr);
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if (error) {
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dev_err(dev, "failed to request IRQ #%d: %d\n",
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irq, error);
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@ -106,21 +150,15 @@ static int tps65218_pwron_probe(struct platform_device *pdev)
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return 0;
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}
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static const struct of_device_id of_tps65218_pwr_match[] = {
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{ .compatible = "ti,tps65218-pwrbutton" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, of_tps65218_pwr_match);
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static struct platform_driver tps65218_pwron_driver = {
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.probe = tps65218_pwron_probe,
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static struct platform_driver tps6521x_pb_driver = {
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.probe = tps6521x_pb_probe,
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.driver = {
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.name = "tps65218_pwrbutton",
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.of_match_table = of_tps65218_pwr_match,
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.name = "tps6521x_pwrbutton",
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.of_match_table = of_tps6521x_pb_match,
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},
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};
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module_platform_driver(tps65218_pwron_driver);
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module_platform_driver(tps6521x_pb_driver);
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MODULE_DESCRIPTION("TPS65218 Power Button");
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MODULE_DESCRIPTION("TPS6521X Power Button");
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
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