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Diffstat (limited to 'drivers/leds/leds-adp5520.c')
-rw-r--r--drivers/leds/leds-adp5520.c197
1 files changed, 197 insertions, 0 deletions
diff --git a/drivers/leds/leds-adp5520.c b/drivers/leds/leds-adp5520.c
new file mode 100644
index 0000000000..5a0cc7af2d
--- /dev/null
+++ b/drivers/leds/leds-adp5520.c
@@ -0,0 +1,197 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs
+ *
+ * Copyright 2009 Analog Devices Inc.
+ *
+ * Loosely derived from leds-da903x:
+ * Copyright (C) 2008 Compulab, Ltd.
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ * Eric Miao <eric.miao@marvell.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/mfd/adp5520.h>
+#include <linux/slab.h>
+
+struct adp5520_led {
+ struct led_classdev cdev;
+ struct device *master;
+ int id;
+ int flags;
+};
+
+static int adp5520_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct adp5520_led *led;
+
+ led = container_of(led_cdev, struct adp5520_led, cdev);
+ return adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1,
+ value >> 2);
+}
+
+static int adp5520_led_setup(struct adp5520_led *led)
+{
+ struct device *dev = led->master;
+ int flags = led->flags;
+ int ret = 0;
+
+ switch (led->id) {
+ case FLAG_ID_ADP5520_LED1_ADP5501_LED0:
+ ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
+ (flags >> ADP5520_FLAG_OFFT_SHIFT) &
+ ADP5520_FLAG_OFFT_MASK);
+ ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
+ ADP5520_LED1_EN);
+ break;
+ case FLAG_ID_ADP5520_LED2_ADP5501_LED1:
+ ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
+ ((flags >> ADP5520_FLAG_OFFT_SHIFT) &
+ ADP5520_FLAG_OFFT_MASK) << 2);
+ ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
+ ADP5520_R3_MODE);
+ ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
+ ADP5520_LED2_EN);
+ break;
+ case FLAG_ID_ADP5520_LED3_ADP5501_LED2:
+ ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
+ ((flags >> ADP5520_FLAG_OFFT_SHIFT) &
+ ADP5520_FLAG_OFFT_MASK) << 4);
+ ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
+ ADP5520_C3_MODE);
+ ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
+ ADP5520_LED3_EN);
+ break;
+ }
+
+ return ret;
+}
+
+static int adp5520_led_prepare(struct platform_device *pdev)
+{
+ struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct device *dev = pdev->dev.parent;
+ int ret = 0;
+
+ ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0);
+ ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0);
+ ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0);
+ ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6);
+ ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in,
+ pdata->fade_out));
+
+ return ret;
+}
+
+static int adp5520_led_probe(struct platform_device *pdev)
+{
+ struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct adp5520_led *led, *led_dat;
+ struct led_info *cur_led;
+ int ret, i;
+
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "missing platform data\n");
+ return -ENODEV;
+ }
+
+ if (pdata->num_leds > ADP5520_01_MAXLEDS) {
+ dev_err(&pdev->dev, "can't handle more than %d LEDS\n",
+ ADP5520_01_MAXLEDS);
+ return -EFAULT;
+ }
+
+ led = devm_kcalloc(&pdev->dev, pdata->num_leds, sizeof(*led),
+ GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ ret = adp5520_led_prepare(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to write\n");
+ return ret;
+ }
+
+ for (i = 0; i < pdata->num_leds; ++i) {
+ cur_led = &pdata->leds[i];
+ led_dat = &led[i];
+
+ led_dat->cdev.name = cur_led->name;
+ led_dat->cdev.default_trigger = cur_led->default_trigger;
+ led_dat->cdev.brightness_set_blocking = adp5520_led_set;
+ led_dat->cdev.brightness = LED_OFF;
+
+ if (cur_led->flags & ADP5520_FLAG_LED_MASK)
+ led_dat->flags = cur_led->flags;
+ else
+ led_dat->flags = i + 1;
+
+ led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK;
+
+ led_dat->master = pdev->dev.parent;
+
+ ret = led_classdev_register(led_dat->master, &led_dat->cdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register LED %d\n",
+ led_dat->id);
+ goto err;
+ }
+
+ ret = adp5520_led_setup(led_dat);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to write\n");
+ i++;
+ goto err;
+ }
+ }
+
+ platform_set_drvdata(pdev, led);
+ return 0;
+
+err:
+ if (i > 0) {
+ for (i = i - 1; i >= 0; i--)
+ led_classdev_unregister(&led[i].cdev);
+ }
+
+ return ret;
+}
+
+static int adp5520_led_remove(struct platform_device *pdev)
+{
+ struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct adp5520_led *led;
+ int i;
+
+ led = platform_get_drvdata(pdev);
+
+ adp5520_clr_bits(led->master, ADP5520_LED_CONTROL,
+ ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN);
+
+ for (i = 0; i < pdata->num_leds; i++) {
+ led_classdev_unregister(&led[i].cdev);
+ }
+
+ return 0;
+}
+
+static struct platform_driver adp5520_led_driver = {
+ .driver = {
+ .name = "adp5520-led",
+ },
+ .probe = adp5520_led_probe,
+ .remove = adp5520_led_remove,
+};
+
+module_platform_driver(adp5520_led_driver);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:adp5520-led");