diff options
Diffstat (limited to 'target/linux/sunxi/patches-3.18/130-input-add-axp20x-pek.patch')
| -rw-r--r-- | target/linux/sunxi/patches-3.18/130-input-add-axp20x-pek.patch | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-3.18/130-input-add-axp20x-pek.patch b/target/linux/sunxi/patches-3.18/130-input-add-axp20x-pek.patch new file mode 100644 index 0000000..28ed6a3 --- /dev/null +++ b/target/linux/sunxi/patches-3.18/130-input-add-axp20x-pek.patch @@ -0,0 +1,332 @@ +From 63d559304a15ffead2fa1014b93dbcabf516c257 Mon Sep 17 00:00:00 2001 +From: Carlo Caione <carlo@caione.org> +Date: Mon, 19 May 2014 21:47:45 +0200 +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> +Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> +--- + drivers/input/misc/Kconfig | 11 ++ + drivers/input/misc/Makefile | 1 + + drivers/input/misc/axp20x-pek.c | 281 ++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 293 insertions(+) + create mode 100644 drivers/input/misc/axp20x-pek.c + +--- a/drivers/input/misc/Kconfig ++++ b/drivers/input/misc/Kconfig +@@ -404,6 +404,17 @@ 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 +@@ -54,6 +54,7 @@ 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 +1,281 @@ ++/* ++ * 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) ++ ++struct axp20x_pek { ++ struct axp20x_dev *axp20x; ++ struct input_dev *input; ++ int irq_dbr; ++ int irq_dbf; ++}; ++ ++struct axp20x_time { ++ unsigned int time; ++ unsigned int idx; ++}; ++ ++static const struct axp20x_time startup_time[] = { ++ { .time = 128, .idx = 0 }, ++ { .time = 1000, .idx = 2 }, ++ { .time = 3000, .idx = 1 }, ++ { .time = 2000, .idx = 3 }, ++}; ++ ++static const struct axp20x_time shutdown_time[] = { ++ { .time = 4000, .idx = 0 }, ++ { .time = 6000, .idx = 1 }, ++ { .time = 8000, .idx = 2 }, ++ { .time = 10000, .idx = 3 }, ++}; ++ ++struct axp20x_pek_ext_attr { ++ const struct axp20x_time *p_time; ++ unsigned int mask; ++}; ++ ++static struct axp20x_pek_ext_attr axp20x_pek_startup_ext_attr = { ++ .p_time = startup_time, ++ .mask = AXP20X_PEK_STARTUP_MASK, ++}; ++ ++static struct axp20x_pek_ext_attr axp20x_pek_shutdown_ext_attr = { ++ .p_time = 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; ++} ++ ++static 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; ++ ++ 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 == axp20x_ea->p_time[i].idx) ++ val = axp20x_ea->p_time[i].time; ++ ++ return sprintf(buf, "%u\n", val); ++} ++ ++static 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]; ++ size_t len; ++ int ret, i; ++ unsigned int val, idx = 0; ++ unsigned int best_err = UINT_MAX; ++ ++ 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'; ++ ++ ret = kstrtouint(val_str, 10, &val); ++ if (ret) ++ return ret; ++ ++ for (i = 3; i >= 0; i--) { ++ unsigned int err; ++ ++ err = abs(axp20x_ea->p_time[i].time - val); ++ if (err < best_err) { ++ best_err = err; ++ idx = axp20x_ea->p_time[i].idx; ++ } ++ ++ if (!err) ++ break; ++ } ++ ++ idx <<= ffs(axp20x_ea->mask) - 1; ++ ret = regmap_update_bits(axp20x_pek->axp20x->regmap, ++ AXP20X_PEK_KEY, ++ axp20x_ea->mask, idx); ++ if (ret != 0) ++ return -EINVAL; ++ return count; ++} ++ ++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 = __ATTR(shutdown, 0644, axp20x_show_ext_attr, axp20x_store_ext_attr), ++ .var = &axp20x_pek_shutdown_ext_attr ++}; ++ ++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_any_context_irq(&pdev->dev, axp20x_pek->irq_dbr, ++ axp20x_pek_irq, 0, ++ "axp20x-pek-dbr", idev); ++ if (error < 0) { ++ dev_err(axp20x->dev, "Failed to request dbr IRQ#%d: %d\n", ++ axp20x_pek->irq_dbr, error); ++ ++ return error; ++ } ++ ++ error = devm_request_any_context_irq(&pdev->dev, axp20x_pek->irq_dbf, ++ axp20x_pek_irq, 0, ++ "axp20x-pek-dbf", idev); ++ if (error < 0) { ++ dev_err(axp20x->dev, "Failed to request dbf IRQ#%d: %d\n", ++ axp20x_pek->irq_dbf, error); ++ return error; ++ } ++ ++ error = device_create_file(&pdev->dev, &axp20x_dev_attr_startup.attr); ++ if (error) ++ return error; ++ ++ error = device_create_file(&pdev->dev, &axp20x_dev_attr_shutdown.attr); ++ if (error) ++ goto clear_startup_attr; ++ ++ error = input_register_device(idev); ++ if (error) { ++ dev_err(axp20x->dev, "Can't register input device: %d\n", error); ++ goto clear_attr; ++ } ++ ++ platform_set_drvdata(pdev, axp20x_pek); ++ ++ return 0; ++ ++clear_attr: ++ device_remove_file(&pdev->dev, &axp20x_dev_attr_shutdown.attr); ++ ++clear_startup_attr: ++ device_remove_file(&pdev->dev, &axp20x_dev_attr_startup.attr); ++ ++ return error; ++} ++ ++int axp20x_pek_remove(struct platform_device *pdev) ++{ ++ device_remove_file(&pdev->dev, &axp20x_dev_attr_shutdown.attr); ++ device_remove_file(&pdev->dev, &axp20x_dev_attr_startup.attr); ++ ++ return 0; ++} ++ ++static struct platform_driver axp20x_pek_driver = { ++ .probe = axp20x_pek_probe, ++ .remove = axp20x_pek_remove, ++ .driver = { ++ .name = "axp20x-pek", ++ .owner = THIS_MODULE, ++ }, ++}; ++module_platform_driver(axp20x_pek_driver); ++ ++MODULE_DESCRIPTION("axp20x Power Button"); ++MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); ++MODULE_LICENSE("GPL"); |