--- /dev/null
+From 656b9ff9781aa3ffeb4231f32dfc545c92d04a12 Mon Sep 17 00:00:00 2001
+From: Carlo Caione <carlo@caione.org>
+Date: Sat, 1 Mar 2014 17:45:49 +0100
+Subject: [PATCH] input: misc: Add driver for AXP20x Power Enable Key
+
+This patch add support for the Power Enable Key found on MFD AXP202 and
+AXP209. Besides the basic support for the button, the driver adds two
+entries in sysfs to configure the time delay for power on/off.
+
+Signed-off-by: Carlo Caione <carlo@caione.org>
+---
+ arch/arm/configs/sunxi_defconfig | 2 +
+ drivers/input/misc/Kconfig | 11 ++
+ drivers/input/misc/Makefile | 1 +
+ drivers/input/misc/axp20x-pek.c | 265 +++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 279 insertions(+)
+ create mode 100644 drivers/input/misc/axp20x-pek.c
+
+diff --git a/arch/arm/configs/sunxi_defconfig b/arch/arm/configs/sunxi_defconfig
+index d25660d..3ed7023 100644
+--- a/arch/arm/configs/sunxi_defconfig
++++ b/arch/arm/configs/sunxi_defconfig
+@@ -40,6 +40,8 @@ CONFIG_SUN4I_EMAC=y
+ # CONFIG_NET_VENDOR_STMICRO is not set
+ # CONFIG_NET_VENDOR_WIZNET is not set
+ # CONFIG_WLAN is not set
++CONFIG_INPUT_MISC=y
++CONFIG_INPUT_AXP20X_PEK=y
+ CONFIG_SERIAL_8250=y
+ CONFIG_SERIAL_8250_CONSOLE=y
+ CONFIG_SERIAL_8250_NR_UARTS=8
+diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
+index 7904ab0..87244fb 100644
+--- a/drivers/input/misc/Kconfig
++++ b/drivers/input/misc/Kconfig
+@@ -393,6 +393,17 @@ config INPUT_RETU_PWRBUTTON
+ To compile this driver as a module, choose M here. The module will
+ be called retu-pwrbutton.
+
++config INPUT_AXP20X_PEK
++ tristate "X-Powers AXP20X power button driver"
++ depends on MFD_AXP20X
++ help
++ Say Y here if you want to enable power key reporting via the
++ AXP20X PMIC.
++
++ To compile this driver as a module, choose M here. The module will
++ be called axp20x-pek.
++
++
+ config INPUT_TWL4030_PWRBUTTON
+ tristate "TWL4030 Power button Driver"
+ depends on TWL4030_CORE
+diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
+index cda71fc..624abf5 100644
+--- a/drivers/input/misc/Makefile
++++ b/drivers/input/misc/Makefile
+@@ -50,6 +50,7 @@ obj-$(CONFIG_INPUT_POWERMATE) += powermate.o
+ obj-$(CONFIG_INPUT_PWM_BEEPER) += pwm-beeper.o
+ obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o
+ obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o
++obj-$(CONFIG_INPUT_AXP20X_PEK) += axp20x-pek.o
+ obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o
+ obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o
+ obj-$(CONFIG_INPUT_SIRFSOC_ONKEY) += sirfsoc-onkey.o
+diff --git a/drivers/input/misc/axp20x-pek.c b/drivers/input/misc/axp20x-pek.c
+new file mode 100644
+index 0000000..799275d
+--- /dev/null
++++ b/drivers/input/misc/axp20x-pek.c
+@@ -0,0 +1,265 @@
++/*
++ * axp20x power button driver.
++ *
++ * Copyright (C) 2013 Carlo Caione <carlo@caione.org>
++ *
++ * This file is subject to the terms and conditions of the GNU General
++ * Public License. See the file "COPYING" in the main directory of this
++ * archive for more details.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/errno.h>
++#include <linux/irq.h>
++#include <linux/init.h>
++#include <linux/input.h>
++#include <linux/interrupt.h>
++#include <linux/kernel.h>
++#include <linux/mfd/axp20x.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/regmap.h>
++#include <linux/slab.h>
++
++#define AXP20X_PEK_STARTUP_MASK (0xc0)
++#define AXP20X_PEK_SHUTDOWN_MASK (0x03)
++
++static const char const *startup_time[] = { "128mS", "3S" , "1S", "2S" };
++static const char const *shutdown_time[] = { "4S", "6S" , "8S", "10S" };
++
++struct axp20x_pek {
++ struct axp20x_dev *axp20x;
++ struct input_dev *input;
++ int irq_dbr;
++ int irq_dbf;
++};
++
++struct axp20x_pek_ext_attr {
++ const char const **str;
++ unsigned int mask;
++};
++
++static struct axp20x_pek_ext_attr axp20x_pek_startup_ext_attr = {
++ .str = startup_time,
++ .mask = AXP20X_PEK_STARTUP_MASK,
++};
++
++static struct axp20x_pek_ext_attr axp20x_pek_shutdown_ext_attr = {
++ .str = shutdown_time,
++ .mask = AXP20X_PEK_SHUTDOWN_MASK,
++};
++
++static struct axp20x_pek_ext_attr *get_axp_ext_attr(struct device_attribute *attr)
++{
++ return container_of(attr, struct dev_ext_attribute, attr)->var;
++}
++
++ssize_t axp20x_show_ext_attr(struct device *dev, struct device_attribute *attr,
++ char *buf)
++{
++ struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
++ struct axp20x_pek_ext_attr *axp20x_ea = get_axp_ext_attr(attr);
++ unsigned int val;
++ int ret, i;
++ int cnt = 0;
++
++ ret = regmap_read(axp20x_pek->axp20x->regmap, AXP20X_PEK_KEY, &val);
++ if (ret != 0)
++ return ret;
++
++ val &= axp20x_ea->mask;
++ val >>= ffs(axp20x_ea->mask) - 1;
++
++ for (i = 0; i < 4; i++) {
++ if (val == i)
++ cnt += sprintf(buf + cnt, "[%s] ", axp20x_ea->str[i]);
++ else
++ cnt += sprintf(buf + cnt, "%s ", axp20x_ea->str[i]);
++ }
++
++ cnt += sprintf(buf + cnt, "\n");
++
++ return cnt;
++}
++
++ssize_t axp20x_store_ext_attr(struct device *dev, struct device_attribute *attr,
++ const char *buf, size_t count)
++{
++ struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
++ struct axp20x_pek_ext_attr *axp20x_ea = get_axp_ext_attr(attr);
++ char val_str[20];
++ int ret, i;
++ size_t len;
++
++ val_str[sizeof(val_str) - 1] = '\0';
++ strncpy(val_str, buf, sizeof(val_str) - 1);
++ len = strlen(val_str);
++
++ if (len && val_str[len - 1] == '\n')
++ val_str[len - 1] = '\0';
++
++ for (i = 0; i < 4; i++) {
++ if (!strcmp(val_str, axp20x_ea->str[i])) {
++ ret = regmap_update_bits(axp20x_pek->axp20x->regmap,
++ AXP20X_PEK_KEY,
++ axp20x_ea->mask, i);
++ if (ret != 0)
++ return -EINVAL;
++ return count;
++ }
++ }
++
++ return -EINVAL;
++}
++
++static struct dev_ext_attribute axp20x_dev_attr_startup = {
++ .attr = __ATTR(startup, 0644, axp20x_show_ext_attr, axp20x_store_ext_attr),
++ .var = &axp20x_pek_startup_ext_attr
++};
++
++static struct dev_ext_attribute axp20x_dev_attr_shutdown = {
++ __ATTR(shutdown, 0644, axp20x_show_ext_attr, axp20x_store_ext_attr),
++ &axp20x_pek_shutdown_ext_attr
++};
++
++static struct attribute *dev_attrs[] = {
++ &axp20x_dev_attr_startup.attr.attr,
++ &axp20x_dev_attr_shutdown.attr.attr,
++ NULL,
++};
++
++static struct attribute_group dev_attr_group = {
++ .attrs = dev_attrs,
++};
++
++static const struct attribute_group *dev_attr_groups[] = {
++ &dev_attr_group,
++ NULL,
++};
++
++static irqreturn_t axp20x_pek_irq(int irq, void *pwr)
++{
++ struct input_dev *idev = pwr;
++ struct axp20x_pek *axp20x_pek = input_get_drvdata(idev);
++
++ if (irq == axp20x_pek->irq_dbr)
++ input_report_key(idev, KEY_POWER, true);
++ else if (irq == axp20x_pek->irq_dbf)
++ input_report_key(idev, KEY_POWER, false);
++
++ input_sync(idev);
++
++ return IRQ_HANDLED;
++}
++
++static int axp20x_pek_probe(struct platform_device *pdev)
++{
++ struct axp20x_pek *axp20x_pek;
++ struct axp20x_dev *axp20x;
++ struct input_dev *idev;
++ int error;
++
++ axp20x_pek = devm_kzalloc(&pdev->dev, sizeof(struct axp20x_pek),
++ GFP_KERNEL);
++ if (!axp20x_pek)
++ return -ENOMEM;
++
++ axp20x_pek->axp20x = dev_get_drvdata(pdev->dev.parent);
++ axp20x = axp20x_pek->axp20x;
++
++ axp20x_pek->irq_dbr = platform_get_irq_byname(pdev, "PEK_DBR");
++ if (axp20x_pek->irq_dbr < 0) {
++ dev_err(&pdev->dev, "No IRQ for PEK_DBR, error=%d\n",
++ axp20x_pek->irq_dbr);
++ return axp20x_pek->irq_dbr;
++ }
++ axp20x_pek->irq_dbr = regmap_irq_get_virq(axp20x->regmap_irqc,
++ axp20x_pek->irq_dbr);
++
++ axp20x_pek->irq_dbf = platform_get_irq_byname(pdev, "PEK_DBF");
++ if (axp20x_pek->irq_dbf < 0) {
++ dev_err(&pdev->dev, "No IRQ for PEK_DBF, error=%d\n",
++ axp20x_pek->irq_dbf);
++ return axp20x_pek->irq_dbf;
++ }
++ axp20x_pek->irq_dbf = regmap_irq_get_virq(axp20x->regmap_irqc,
++ axp20x_pek->irq_dbf);
++
++ axp20x_pek->input = devm_input_allocate_device(&pdev->dev);
++ if (!axp20x_pek->input)
++ return -ENOMEM;
++
++ idev = axp20x_pek->input;
++
++ idev->name = "axp20x-pek";
++ idev->phys = "m1kbd/input2";
++ idev->dev.parent = &pdev->dev;
++
++ input_set_capability(idev, EV_KEY, KEY_POWER);
++
++ input_set_drvdata(idev, axp20x_pek);
++
++ error = devm_request_threaded_irq(&pdev->dev, axp20x_pek->irq_dbr,
++ NULL, axp20x_pek_irq, 0,
++ "axp20x-pek-dbr", idev);
++ if (error) {
++ dev_err(axp20x->dev, "Failed to request dbr IRQ#%d: %d\n",
++ axp20x_pek->irq_dbr, error);
++
++ return error;
++ }
++
++ error = devm_request_threaded_irq(&pdev->dev, axp20x_pek->irq_dbf,
++ NULL, axp20x_pek_irq, 0,
++ "axp20x-pek-dbf", idev);
++ if (error) {
++ dev_err(axp20x->dev, "Failed to request dbf IRQ#%d: %d\n",
++ axp20x_pek->irq_dbf, error);
++ return error;
++ }
++
++ idev->dev.groups = dev_attr_groups;
++ error = input_register_device(idev);
++ if (error) {
++ dev_err(axp20x->dev, "Can't register input device: %d\n", error);
++ return error;
++ }
++
++ platform_set_drvdata(pdev, axp20x_pek);
++
++ return 0;
++}
++
++static int axp20x_pek_remove(struct platform_device *pdev)
++{
++ struct axp20x_pek *axp20x_pek = platform_get_drvdata(pdev);
++
++ input_unregister_device(axp20x_pek->input);
++
++ return 0;
++}
++
++static const struct of_device_id axp20x_pek_match[] = {
++ { .compatible = "x-powers,axp20x-pek", },
++ { /* sentinel */ },
++};
++MODULE_DEVICE_TABLE(of, axp20x_pek_match);
++
++static struct platform_driver axp20x_pek_driver = {
++ .probe = axp20x_pek_probe,
++ .remove = axp20x_pek_remove,
++ .driver = {
++ .name = "axp20x-pek",
++ .owner = THIS_MODULE,
++ .of_match_table = axp20x_pek_match,
++ },
++};
++module_platform_driver(axp20x_pek_driver);
++
++MODULE_DESCRIPTION("axp20x Power Button");
++MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
++MODULE_LICENSE("GPL");
+--
+2.0.3
+
projects / openwrt / openwrt.git / blobdiff