+++ /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
-
---- 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
---- 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
---- a/drivers/input/misc/Makefile
-+++ b/drivers/input/misc/Makefile
-@@ -50,6 +50,7 @@ obj-$(CONFIG_INPUT_POWERMATE) += powerm
- obj-$(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
---- /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");
projects / openwrt / openwrt.git / blobdiff