--- /dev/null
+/*
+ * Copyright (C) 2009 Motorola, Inc.
+ *
+ * This program is free dispware; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free dispware Foundation.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free dispware
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307, USA
+ */
+
+#include <linux/err.h>
+#include <linux/leds.h>
+#include <linux/leds-ld-cpcap.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/cpcap.h>
+#include <linux/spi/cpcap-regbits.h>
+
+struct disp_button_led_data {
+ struct led_classdev disp_button_class_dev;
+ struct cpcap_device *cpcap;
+ struct regulator *regulator;
+ struct work_struct brightness_work;
+ enum led_brightness brightness;
+ int regulator_state;
+};
+
+static void disp_button_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct disp_button_led_data *disp_button_led_data =
+ container_of(led_cdev, struct disp_button_led_data,
+ disp_button_class_dev);
+
+ if (brightness > 255)
+ brightness = 255;
+
+ disp_button_led_data->brightness = brightness;
+ schedule_work(&disp_button_led_data->brightness_work);
+}
+EXPORT_SYMBOL(disp_button_set);
+
+static void disp_button_brightness_work(struct work_struct *work)
+{
+ int cpcap_status = 0;
+ unsigned short brightness = 0;
+
+ struct disp_button_led_data *disp_button_led_data =
+ container_of(work, struct disp_button_led_data, brightness_work);
+
+ brightness = disp_button_led_data->brightness;
+
+ if (brightness > 0) {
+ brightness = (LD_DISP_BUTTON_DUTY_CYCLE |
+ LD_DISP_BUTTON_CURRENT | LD_DISP_BUTTON_ON);
+
+ if ((disp_button_led_data->regulator) &&
+ (disp_button_led_data->regulator_state == 0)) {
+ regulator_enable(disp_button_led_data->regulator);
+ disp_button_led_data->regulator_state = 1;
+ }
+
+ cpcap_status = cpcap_regacc_write(disp_button_led_data->cpcap,
+ CPCAP_REG_KLC,
+ brightness,
+ LD_DISP_BUTTON_CPCAP_MASK);
+
+ if (cpcap_status < 0)
+ pr_err("%s: Writing to the register failed for %i\n",
+ __func__, cpcap_status);
+
+ } else {
+ if ((disp_button_led_data->regulator) &&
+ (disp_button_led_data->regulator_state == 1)) {
+ regulator_disable(disp_button_led_data->regulator);
+ disp_button_led_data->regulator_state = 0;
+ }
+ /* Due to a HW issue turn off the current then
+ turn off the duty cycle */
+ brightness = 0x01;
+ cpcap_status = cpcap_regacc_write(disp_button_led_data->cpcap,
+ CPCAP_REG_KLC, brightness,
+ LD_DISP_BUTTON_CPCAP_MASK);
+
+ brightness = 0x00;
+ cpcap_status = cpcap_regacc_write(disp_button_led_data->cpcap,
+ CPCAP_REG_KLC, brightness,
+ LD_DISP_BUTTON_CPCAP_MASK);
+
+ if (cpcap_status < 0)
+ pr_err("%s: Writing to the register failed for %i\n",
+ __func__, cpcap_status);
+ }
+}
+
+static int disp_button_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct disp_button_led_data *info;
+
+ if (pdev == NULL) {
+ pr_err("%s: platform data required\n", __func__);
+ return -ENODEV;
+
+ }
+ info = kzalloc(sizeof(struct disp_button_led_data), GFP_KERNEL);
+ if (info == NULL) {
+ ret = -ENOMEM;
+ return ret;
+ }
+
+ info->cpcap = pdev->dev.platform_data;
+ platform_set_drvdata(pdev, info);
+
+ info->regulator = regulator_get(&pdev->dev, LD_SUPPLY);
+ if (IS_ERR(info->regulator)) {
+ pr_err("%s: Cannot get %s regulator\n", __func__, LD_SUPPLY);
+ ret = PTR_ERR(info->regulator);
+ goto exit_request_reg_failed;
+
+ }
+ info->regulator_state = 0;
+
+ info->disp_button_class_dev.name = "button-backlight";
+ info->disp_button_class_dev.brightness_set = disp_button_set;
+ ret = led_classdev_register(&pdev->dev, &info->disp_button_class_dev);
+ if (ret < 0) {
+ pr_err("%s:Register button backlight class failed\n", __func__);
+ goto err_reg_button_class_failed;
+ }
+ INIT_WORK(&info->brightness_work, disp_button_brightness_work);
+ return ret;
+
+err_reg_button_class_failed:
+ if (info->regulator)
+ regulator_put(info->regulator);
+exit_request_reg_failed:
+ kfree(info);
+ return ret;
+}
+
+static int disp_button_remove(struct platform_device *pdev)
+{
+ struct disp_button_led_data *info = platform_get_drvdata(pdev);
+
+ if (info->regulator)
+ regulator_put(info->regulator);
+
+ led_classdev_unregister(&info->disp_button_class_dev);
+ return 0;
+}
+
+static struct platform_driver ld_disp_button_driver = {
+ .probe = disp_button_probe,
+ .remove = disp_button_remove,
+ .driver = {
+ .name = LD_DISP_BUTTON_DEV,
+ },
+};
+
+static int __init led_disp_button_init(void)
+{
+ return platform_driver_register(&ld_disp_button_driver);
+}
+
+static void __exit led_disp_button_exit(void)
+{
+ platform_driver_unregister(&ld_disp_button_driver);
+}
+
+module_init(led_disp_button_init);
+module_exit(led_disp_button_exit);
+
+MODULE_DESCRIPTION("Display Button Lighting driver");
+MODULE_AUTHOR("Motorola");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2009 Motorola, Inc.
+ *
+ * This program is free dispware; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free dispware Foundation.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free dispware
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307, USA
+ */
+
+#ifndef __LED_LD_CPCAP_H__
+#define __LED_LD_CPCAP_H__
+
+#define LD_MSG_IND_DEV "notification-led"
+#define LD_DISP_BUTTON_DEV "button-backlight"
+#define LD_KPAD_DEV "keyboard-backlight"
+#define LD_AF_LED_DEV "af-led"
+#define LD_SUPPLY "sw5"
+
+#define LD_MSG_IND_ON 0x1
+#define LD_MSG_IND_CURRENT 0x2
+#define LD_MSG_IND_LO_CURRENT 0x0
+
+#define LD_MSG_IND_CPCAP_MASK 0x3FF
+
+#define LD_MSG_IND_LOW 0x20
+#define LD_MSG_IND_LOW_MED 0x20
+#define LD_MSG_IND_MEDIUM 0x30
+#define LD_MSG_IND_MED_HIGH 0x40
+#define LD_MSG_IND_HIGH 0x50
+
+#define LD_LED_RED 0x01
+#define LD_LED_GREEN 0x02
+#define LD_LED_BLUE 0x04
+
+#define LD_DISP_BUTTON_ON 0x1
+#define LD_DISP_BUTTON_CURRENT 0x0
+#define LD_DISP_BUTTON_DUTY_CYCLE 0x2A0
+#define LD_DISP_BUTTON_CPCAP_MASK 0x3FF
+
+#define LD_BLED_CPCAP_DUTY_CYCLE 0x41
+#define LD_BLED_CPCAP_MASK 0x3FF
+#define LD_BLED_CPCAP_CURRENT 0x6
+
+#define LD_ALT_ADBL_CURRENT 0x4
+
+#endif /* __LED_LD_CPCAP_H__ */
projects / firefly-linux-kernel-4.4.55.git / commitdiff