[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/leds/leds-lp8788.c b/src/kernel/linux/v4.14/drivers/leds/leds-lp8788.c
new file mode 100644
index 0000000..38c253a
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/leds/leds-lp8788.c
@@ -0,0 +1,175 @@
+/*
+ * TI LP8788 MFD - keyled driver
+ *
+ * Copyright 2012 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/mutex.h>
+#include <linux/mfd/lp8788.h>
+#include <linux/mfd/lp8788-isink.h>
+
+#define MAX_BRIGHTNESS LP8788_ISINK_MAX_PWM
+#define DEFAULT_LED_NAME "keyboard-backlight"
+
+struct lp8788_led {
+ struct lp8788 *lp;
+ struct mutex lock;
+ struct led_classdev led_dev;
+ enum lp8788_isink_number isink_num;
+ int on;
+};
+
+struct lp8788_led_config {
+ enum lp8788_isink_scale scale;
+ enum lp8788_isink_number num;
+ int iout;
+};
+
+static struct lp8788_led_config default_led_config = {
+ .scale = LP8788_ISINK_SCALE_100mA,
+ .num = LP8788_ISINK_3,
+ .iout = 0,
+};
+
+static int lp8788_led_init_device(struct lp8788_led *led,
+ struct lp8788_led_platform_data *pdata)
+{
+ struct lp8788_led_config *cfg = &default_led_config;
+ u8 addr, mask, val;
+ int ret;
+
+ if (pdata) {
+ cfg->scale = pdata->scale;
+ cfg->num = pdata->num;
+ cfg->iout = pdata->iout_code;
+ }
+
+ led->isink_num = cfg->num;
+
+ /* scale configuration */
+ addr = LP8788_ISINK_CTRL;
+ mask = 1 << (cfg->num + LP8788_ISINK_SCALE_OFFSET);
+ val = cfg->scale << (cfg->num + LP8788_ISINK_SCALE_OFFSET);
+ ret = lp8788_update_bits(led->lp, addr, mask, val);
+ if (ret)
+ return ret;
+
+ /* current configuration */
+ addr = lp8788_iout_addr[cfg->num];
+ mask = lp8788_iout_mask[cfg->num];
+ val = cfg->iout;
+
+ return lp8788_update_bits(led->lp, addr, mask, val);
+}
+
+static int lp8788_led_enable(struct lp8788_led *led,
+ enum lp8788_isink_number num, int on)
+{
+ int ret;
+
+ u8 mask = 1 << num;
+ u8 val = on << num;
+
+ ret = lp8788_update_bits(led->lp, LP8788_ISINK_CTRL, mask, val);
+ if (ret == 0)
+ led->on = on;
+
+ return ret;
+}
+
+static int lp8788_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness val)
+{
+ struct lp8788_led *led =
+ container_of(led_cdev, struct lp8788_led, led_dev);
+
+ enum lp8788_isink_number num = led->isink_num;
+ int enable, ret;
+
+ mutex_lock(&led->lock);
+
+ switch (num) {
+ case LP8788_ISINK_1:
+ case LP8788_ISINK_2:
+ case LP8788_ISINK_3:
+ ret = lp8788_write_byte(led->lp, lp8788_pwm_addr[num], val);
+ if (ret < 0)
+ goto unlock;
+ break;
+ default:
+ mutex_unlock(&led->lock);
+ return -EINVAL;
+ }
+
+ enable = (val > 0) ? 1 : 0;
+ if (enable != led->on)
+ ret = lp8788_led_enable(led, num, enable);
+unlock:
+ mutex_unlock(&led->lock);
+ return ret;
+}
+
+static int lp8788_led_probe(struct platform_device *pdev)
+{
+ struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent);
+ struct lp8788_led_platform_data *led_pdata;
+ struct lp8788_led *led;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ led = devm_kzalloc(dev, sizeof(struct lp8788_led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ led->lp = lp;
+ led->led_dev.max_brightness = MAX_BRIGHTNESS;
+ led->led_dev.brightness_set_blocking = lp8788_brightness_set;
+
+ led_pdata = lp->pdata ? lp->pdata->led_pdata : NULL;
+
+ if (!led_pdata || !led_pdata->name)
+ led->led_dev.name = DEFAULT_LED_NAME;
+ else
+ led->led_dev.name = led_pdata->name;
+
+ mutex_init(&led->lock);
+
+ ret = lp8788_led_init_device(led, led_pdata);
+ if (ret) {
+ dev_err(dev, "led init device err: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_led_classdev_register(dev, &led->led_dev);
+ if (ret) {
+ dev_err(dev, "led register err: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver lp8788_led_driver = {
+ .probe = lp8788_led_probe,
+ .driver = {
+ .name = LP8788_DEV_KEYLED,
+ },
+};
+module_platform_driver(lp8788_led_driver);
+
+MODULE_DESCRIPTION("Texas Instruments LP8788 Keyboard LED Driver");
+MODULE_AUTHOR("Milo Kim");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:lp8788-keyled");