change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/drivers/leds/leds-sc27xx-bltc.c
..
..
@@ -6,7 +6,6 @@
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 #include <linux/of.h>
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 #include <linux/platform_device.h>
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 #include <linux/regmap.h>
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-#include <uapi/linux/uleds.h>
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 /* PMIC global control register definition */
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 #define SC27XX_MODULE_EN0	0xc08
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@@ -32,11 +31,21 @@
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 #define SC27XX_DUTY_MASK	GENMASK(15, 0)
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 #define SC27XX_MOD_MASK		GENMASK(7, 0)
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+#define SC27XX_CURVE_SHIFT	8
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+#define SC27XX_CURVE_L_MASK	GENMASK(7, 0)
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+#define SC27XX_CURVE_H_MASK	GENMASK(15, 8)
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+
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 #define SC27XX_LEDS_OFFSET	0x10
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 #define SC27XX_LEDS_MAX		3
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+#define SC27XX_LEDS_PATTERN_CNT	4
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+/* Stage duration step, in milliseconds */
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+#define SC27XX_LEDS_STEP	125
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+/* Minimum and maximum duration, in milliseconds */
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+#define SC27XX_DELTA_T_MIN	SC27XX_LEDS_STEP
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+#define SC27XX_DELTA_T_MAX	(SC27XX_LEDS_STEP * 255)
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46
 
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 struct sc27xx_led {
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-	char name[LED_MAX_NAME_SIZE];
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+	struct fwnode_handle *fwnode;
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 	struct led_classdev ldev;
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 	struct sc27xx_led_priv *priv;
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 	u8 line;
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@@ -122,6 +131,113 @@
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 	return err;
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 }
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+static void sc27xx_led_clamp_align_delta_t(u32 *delta_t)
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+{
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+	u32 v, offset, t = *delta_t;
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+
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+	v = t + SC27XX_LEDS_STEP / 2;
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+	v = clamp_t(u32, v, SC27XX_DELTA_T_MIN, SC27XX_DELTA_T_MAX);
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+	offset = v - SC27XX_DELTA_T_MIN;
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+	offset = SC27XX_LEDS_STEP * (offset / SC27XX_LEDS_STEP);
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+
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+	*delta_t = SC27XX_DELTA_T_MIN + offset;
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+}
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+
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+static int sc27xx_led_pattern_clear(struct led_classdev *ldev)
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+{
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+	struct sc27xx_led *leds = to_sc27xx_led(ldev);
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+	struct regmap *regmap = leds->priv->regmap;
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+	u32 base = sc27xx_led_get_offset(leds);
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+	u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
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+	u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
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+	int err;
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+
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+	mutex_lock(&leds->priv->lock);
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+
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+	/* Reset the rise, high, fall and low time to zero. */
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+	regmap_write(regmap, base + SC27XX_LEDS_CURVE0, 0);
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+	regmap_write(regmap, base + SC27XX_LEDS_CURVE1, 0);
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+
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+	err = regmap_update_bits(regmap, ctrl_base,
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+			(SC27XX_LED_RUN | SC27XX_LED_TYPE) << ctrl_shift, 0);
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+
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+	ldev->brightness = LED_OFF;
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+
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+	mutex_unlock(&leds->priv->lock);
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+
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+	return err;
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+}
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+
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+static int sc27xx_led_pattern_set(struct led_classdev *ldev,
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+				  struct led_pattern *pattern,
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+				  u32 len, int repeat)
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+{
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+	struct sc27xx_led *leds = to_sc27xx_led(ldev);
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+	u32 base = sc27xx_led_get_offset(leds);
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+	u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
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+	u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
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+	struct regmap *regmap = leds->priv->regmap;
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+	int err;
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+
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+	/*
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+	 * Must contain 4 tuples to configure the rise time, high time, fall
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+	 * time and low time to enable the breathing mode.
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+	 */
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+	if (len != SC27XX_LEDS_PATTERN_CNT)
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+		return -EINVAL;
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+
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+	mutex_lock(&leds->priv->lock);
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+
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+	sc27xx_led_clamp_align_delta_t(&pattern[0].delta_t);
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+	err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE0,
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+				 SC27XX_CURVE_L_MASK,
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+				 pattern[0].delta_t / SC27XX_LEDS_STEP);
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+	if (err)
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+		goto out;
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+
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+	sc27xx_led_clamp_align_delta_t(&pattern[1].delta_t);
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+	err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE1,
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+				 SC27XX_CURVE_L_MASK,
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+				 pattern[1].delta_t / SC27XX_LEDS_STEP);
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+	if (err)
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+		goto out;
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+
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+	sc27xx_led_clamp_align_delta_t(&pattern[2].delta_t);
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+	err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE0,
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+				 SC27XX_CURVE_H_MASK,
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+				 (pattern[2].delta_t / SC27XX_LEDS_STEP) <<
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+				 SC27XX_CURVE_SHIFT);
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+	if (err)
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+		goto out;
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+
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+	sc27xx_led_clamp_align_delta_t(&pattern[3].delta_t);
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+	err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE1,
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+				 SC27XX_CURVE_H_MASK,
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+				 (pattern[3].delta_t / SC27XX_LEDS_STEP) <<
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+				 SC27XX_CURVE_SHIFT);
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+	if (err)
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+		goto out;
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+
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+	err = regmap_update_bits(regmap, base + SC27XX_LEDS_DUTY,
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+				 SC27XX_DUTY_MASK,
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+				 (pattern[1].brightness << SC27XX_DUTY_SHIFT) |
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+				 SC27XX_MOD_MASK);
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+	if (err)
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+		goto out;
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+
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+	/* Enable the LED breathing mode */
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+	err = regmap_update_bits(regmap, ctrl_base,
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+				 SC27XX_LED_RUN << ctrl_shift,
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+				 SC27XX_LED_RUN << ctrl_shift);
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+	if (!err)
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+		ldev->brightness = pattern[1].brightness;
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+
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+out:
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+	mutex_unlock(&leds->priv->lock);
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+
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+	return err;
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+}
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+
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 static int sc27xx_led_register(struct device *dev, struct sc27xx_led_priv *priv)
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 {
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 	int i, err;
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@@ -132,16 +248,24 @@
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 	for (i = 0; i < SC27XX_LEDS_MAX; i++) {
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 		struct sc27xx_led *led = &priv->leds[i];
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+		struct led_init_data init_data = {};
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 		if (!led->active)
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 			continue;
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 		led->line = i;
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 		led->priv = priv;
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-		led->ldev.name = led->name;
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 		led->ldev.brightness_set_blocking = sc27xx_led_set;
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+		led->ldev.pattern_set = sc27xx_led_pattern_set;
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+		led->ldev.pattern_clear = sc27xx_led_pattern_clear;
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+		led->ldev.default_trigger = "pattern";
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262
 
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-		err = devm_led_classdev_register(dev, &led->ldev);
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+		init_data.fwnode = led->fwnode;
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+		init_data.devicename = "sc27xx";
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+		init_data.default_label = ":";
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+
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+		err = devm_led_classdev_register_ext(dev, &led->ldev,
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+						     &init_data);
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 		if (err)
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 			return err;
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 	}
..
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@@ -152,13 +276,12 @@
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 static int sc27xx_led_probe(struct platform_device *pdev)
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 {
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 	struct device *dev = &pdev->dev;
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-	struct device_node *np = dev->of_node, *child;
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+	struct device_node *np = dev_of_node(dev), *child;
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 	struct sc27xx_led_priv *priv;
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-	const char *str;
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 	u32 base, count, reg;
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 	int err;
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-	count = of_get_child_count(np);
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+	count = of_get_available_child_count(np);
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 	if (!count || count > SC27XX_LEDS_MAX)
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 		return -EINVAL;
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..
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@@ -182,7 +305,7 @@
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 		return err;
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 	}
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-	for_each_child_of_node(np, child) {
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+	for_each_available_child_of_node(np, child) {
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 		err = of_property_read_u32(child, "reg", &reg);
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 		if (err) {
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 			of_node_put(child);
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@@ -196,15 +319,8 @@
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 			return -EINVAL;
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 		}
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+		priv->leds[reg].fwnode = of_fwnode_handle(child);
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 		priv->leds[reg].active = true;
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-
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-		err = of_property_read_string(child, "label", &str);
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-		if (err)
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-			snprintf(priv->leds[reg].name, LED_MAX_NAME_SIZE,
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-				 "sc27xx::");
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-		else
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-			snprintf(priv->leds[reg].name, LED_MAX_NAME_SIZE,
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-				 "sc27xx:%s", str);
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 	}
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 	err = sc27xx_led_register(dev, priv);
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@@ -241,4 +357,5 @@
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 MODULE_DESCRIPTION("Spreadtrum SC27xx breathing light controller driver");
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 MODULE_AUTHOR("Xiaotong Lu <xiaotong.lu@spreadtrum.com>");
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+MODULE_AUTHOR("Baolin Wang <baolin.wang@linaro.org>");
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 MODULE_LICENSE("GPL v2");