Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 182 insertions, 0 deletions

diff --git a/drivers/leds/leds-pm8058.c b/drivers/leds/leds-pm8058.c
new file mode 100644
index 000000000..3f49a5181
--- /dev/null
+++ b/drivers/leds/leds-pm8058.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2010, 2011, 2016 The Linux Foundation. All rights reserved.
+ */
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/regmap.h>
+
+#define PM8058_LED_TYPE_COMMON	0x00
+#define PM8058_LED_TYPE_KEYPAD	0x01
+#define PM8058_LED_TYPE_FLASH	0x02
+
+#define PM8058_LED_TYPE_COMMON_MASK	0xf8
+#define PM8058_LED_TYPE_KEYPAD_MASK	0xf0
+#define PM8058_LED_TYPE_COMMON_SHIFT	3
+#define PM8058_LED_TYPE_KEYPAD_SHIFT	4
+
+struct pm8058_led {
+	struct regmap *map;
+	u32 reg;
+	u32 ledtype;
+	struct led_classdev cdev;
+};
+
+static void pm8058_led_set(struct led_classdev *cled,
+	enum led_brightness value)
+{
+	struct pm8058_led *led;
+	int ret = 0;
+	unsigned int mask = 0;
+	unsigned int val = 0;
+
+	led = container_of(cled, struct pm8058_led, cdev);
+	switch (led->ledtype) {
+	case PM8058_LED_TYPE_COMMON:
+		mask = PM8058_LED_TYPE_COMMON_MASK;
+		val = value << PM8058_LED_TYPE_COMMON_SHIFT;
+		break;
+	case PM8058_LED_TYPE_KEYPAD:
+	case PM8058_LED_TYPE_FLASH:
+		mask = PM8058_LED_TYPE_KEYPAD_MASK;
+		val = value << PM8058_LED_TYPE_KEYPAD_SHIFT;
+		break;
+	default:
+		break;
+	}
+
+	ret = regmap_update_bits(led->map, led->reg, mask, val);
+	if (ret)
+		pr_err("Failed to set LED brightness\n");
+}
+
+static enum led_brightness pm8058_led_get(struct led_classdev *cled)
+{
+	struct pm8058_led *led;
+	int ret;
+	unsigned int val;
+
+	led = container_of(cled, struct pm8058_led, cdev);
+
+	ret = regmap_read(led->map, led->reg, &val);
+	if (ret) {
+		pr_err("Failed to get LED brightness\n");
+		return LED_OFF;
+	}
+
+	switch (led->ledtype) {
+	case PM8058_LED_TYPE_COMMON:
+		val &= PM8058_LED_TYPE_COMMON_MASK;
+		val >>= PM8058_LED_TYPE_COMMON_SHIFT;
+		break;
+	case PM8058_LED_TYPE_KEYPAD:
+	case PM8058_LED_TYPE_FLASH:
+		val &= PM8058_LED_TYPE_KEYPAD_MASK;
+		val >>= PM8058_LED_TYPE_KEYPAD_SHIFT;
+		break;
+	default:
+		val = LED_OFF;
+		break;
+	}
+
+	return val;
+}
+
+static int pm8058_led_probe(struct platform_device *pdev)
+{
+	struct led_init_data init_data = {};
+	struct device *dev = &pdev->dev;
+	struct pm8058_led *led;
+	struct device_node *np;
+	int ret;
+	struct regmap *map;
+	enum led_brightness maxbright;
+	enum led_default_state state;
+
+	led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
+	if (!led)
+		return -ENOMEM;
+
+	led->ledtype = (u32)(unsigned long)of_device_get_match_data(dev);
+
+	map = dev_get_regmap(dev->parent, NULL);
+	if (!map) {
+		dev_err(dev, "Parent regmap unavailable.\n");
+		return -ENXIO;
+	}
+	led->map = map;
+
+	np = dev_of_node(dev);
+
+	ret = of_property_read_u32(np, "reg", &led->reg);
+	if (ret) {
+		dev_err(dev, "no register offset specified\n");
+		return -EINVAL;
+	}
+
+	led->cdev.brightness_set = pm8058_led_set;
+	led->cdev.brightness_get = pm8058_led_get;
+	if (led->ledtype == PM8058_LED_TYPE_COMMON)
+		maxbright = 31; /* 5 bits */
+	else
+		maxbright = 15; /* 4 bits */
+	led->cdev.max_brightness = maxbright;
+
+	init_data.fwnode = of_fwnode_handle(np);
+
+	state = led_init_default_state_get(init_data.fwnode);
+	switch (state) {
+	case LEDS_DEFSTATE_ON:
+		led->cdev.brightness = maxbright;
+		pm8058_led_set(&led->cdev, maxbright);
+		break;
+	case LEDS_DEFSTATE_KEEP:
+		led->cdev.brightness = pm8058_led_get(&led->cdev);
+		break;
+	default:
+		led->cdev.brightness = LED_OFF;
+		pm8058_led_set(&led->cdev, LED_OFF);
+	}
+
+	if (led->ledtype == PM8058_LED_TYPE_KEYPAD ||
+	    led->ledtype == PM8058_LED_TYPE_FLASH)
+		led->cdev.flags	= LED_CORE_SUSPENDRESUME;
+
+	ret = devm_led_classdev_register_ext(dev, &led->cdev, &init_data);
+	if (ret)
+		dev_err(dev, "Failed to register LED for %pOF\n", np);
+
+	return ret;
+}
+
+static const struct of_device_id pm8058_leds_id_table[] = {
+	{
+		.compatible = "qcom,pm8058-led",
+		.data = (void *)PM8058_LED_TYPE_COMMON
+	},
+	{
+		.compatible = "qcom,pm8058-keypad-led",
+		.data = (void *)PM8058_LED_TYPE_KEYPAD
+	},
+	{
+		.compatible = "qcom,pm8058-flash-led",
+		.data = (void *)PM8058_LED_TYPE_FLASH
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, pm8058_leds_id_table);
+
+static struct platform_driver pm8058_led_driver = {
+	.probe		= pm8058_led_probe,
+	.driver		= {
+		.name	= "pm8058-leds",
+		.of_match_table = pm8058_leds_id_table,
+	},
+};
+module_platform_driver(pm8058_led_driver);
+
+MODULE_DESCRIPTION("PM8058 LEDs driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:pm8058-leds");