From 297b60346df8beafee954a0fd7c2d64f33f3b9bc Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 01:44:05 +0000
Subject: [PATCH] rtl8211F_led_control
---
kernel/drivers/leds/leds-sc27xx-bltc.c | 149 ++++++++++++++++++++++++++++++++++++++++++++-----
1 files changed, 133 insertions(+), 16 deletions(-)
diff --git a/kernel/drivers/leds/leds-sc27xx-bltc.c b/kernel/drivers/leds/leds-sc27xx-bltc.c
index 9d9b7aa..e199ea1 100644
--- a/kernel/drivers/leds/leds-sc27xx-bltc.c
+++ b/kernel/drivers/leds/leds-sc27xx-bltc.c
@@ -6,7 +6,6 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
-#include <uapi/linux/uleds.h>
/* PMIC global control register definition */
#define SC27XX_MODULE_EN0 0xc08
@@ -32,11 +31,21 @@
#define SC27XX_DUTY_MASK GENMASK(15, 0)
#define SC27XX_MOD_MASK GENMASK(7, 0)
+#define SC27XX_CURVE_SHIFT 8
+#define SC27XX_CURVE_L_MASK GENMASK(7, 0)
+#define SC27XX_CURVE_H_MASK GENMASK(15, 8)
+
#define SC27XX_LEDS_OFFSET 0x10
#define SC27XX_LEDS_MAX 3
+#define SC27XX_LEDS_PATTERN_CNT 4
+/* Stage duration step, in milliseconds */
+#define SC27XX_LEDS_STEP 125
+/* Minimum and maximum duration, in milliseconds */
+#define SC27XX_DELTA_T_MIN SC27XX_LEDS_STEP
+#define SC27XX_DELTA_T_MAX (SC27XX_LEDS_STEP * 255)
struct sc27xx_led {
- char name[LED_MAX_NAME_SIZE];
+ struct fwnode_handle *fwnode;
struct led_classdev ldev;
struct sc27xx_led_priv *priv;
u8 line;
@@ -122,6 +131,113 @@
return err;
}
+static void sc27xx_led_clamp_align_delta_t(u32 *delta_t)
+{
+ u32 v, offset, t = *delta_t;
+
+ v = t + SC27XX_LEDS_STEP / 2;
+ v = clamp_t(u32, v, SC27XX_DELTA_T_MIN, SC27XX_DELTA_T_MAX);
+ offset = v - SC27XX_DELTA_T_MIN;
+ offset = SC27XX_LEDS_STEP * (offset / SC27XX_LEDS_STEP);
+
+ *delta_t = SC27XX_DELTA_T_MIN + offset;
+}
+
+static int sc27xx_led_pattern_clear(struct led_classdev *ldev)
+{
+ struct sc27xx_led *leds = to_sc27xx_led(ldev);
+ struct regmap *regmap = leds->priv->regmap;
+ u32 base = sc27xx_led_get_offset(leds);
+ u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
+ u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
+ int err;
+
+ mutex_lock(&leds->priv->lock);
+
+ /* Reset the rise, high, fall and low time to zero. */
+ regmap_write(regmap, base + SC27XX_LEDS_CURVE0, 0);
+ regmap_write(regmap, base + SC27XX_LEDS_CURVE1, 0);
+
+ err = regmap_update_bits(regmap, ctrl_base,
+ (SC27XX_LED_RUN | SC27XX_LED_TYPE) << ctrl_shift, 0);
+
+ ldev->brightness = LED_OFF;
+
+ mutex_unlock(&leds->priv->lock);
+
+ return err;
+}
+
+static int sc27xx_led_pattern_set(struct led_classdev *ldev,
+ struct led_pattern *pattern,
+ u32 len, int repeat)
+{
+ struct sc27xx_led *leds = to_sc27xx_led(ldev);
+ u32 base = sc27xx_led_get_offset(leds);
+ u32 ctrl_base = leds->priv->base + SC27XX_LEDS_CTRL;
+ u8 ctrl_shift = SC27XX_CTRL_SHIFT * leds->line;
+ struct regmap *regmap = leds->priv->regmap;
+ int err;
+
+ /*
+ * Must contain 4 tuples to configure the rise time, high time, fall
+ * time and low time to enable the breathing mode.
+ */
+ if (len != SC27XX_LEDS_PATTERN_CNT)
+ return -EINVAL;
+
+ mutex_lock(&leds->priv->lock);
+
+ sc27xx_led_clamp_align_delta_t(&pattern[0].delta_t);
+ err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE0,
+ SC27XX_CURVE_L_MASK,
+ pattern[0].delta_t / SC27XX_LEDS_STEP);
+ if (err)
+ goto out;
+
+ sc27xx_led_clamp_align_delta_t(&pattern[1].delta_t);
+ err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE1,
+ SC27XX_CURVE_L_MASK,
+ pattern[1].delta_t / SC27XX_LEDS_STEP);
+ if (err)
+ goto out;
+
+ sc27xx_led_clamp_align_delta_t(&pattern[2].delta_t);
+ err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE0,
+ SC27XX_CURVE_H_MASK,
+ (pattern[2].delta_t / SC27XX_LEDS_STEP) <<
+ SC27XX_CURVE_SHIFT);
+ if (err)
+ goto out;
+
+ sc27xx_led_clamp_align_delta_t(&pattern[3].delta_t);
+ err = regmap_update_bits(regmap, base + SC27XX_LEDS_CURVE1,
+ SC27XX_CURVE_H_MASK,
+ (pattern[3].delta_t / SC27XX_LEDS_STEP) <<
+ SC27XX_CURVE_SHIFT);
+ if (err)
+ goto out;
+
+ err = regmap_update_bits(regmap, base + SC27XX_LEDS_DUTY,
+ SC27XX_DUTY_MASK,
+ (pattern[1].brightness << SC27XX_DUTY_SHIFT) |
+ SC27XX_MOD_MASK);
+ if (err)
+ goto out;
+
+ /* Enable the LED breathing mode */
+ err = regmap_update_bits(regmap, ctrl_base,
+ SC27XX_LED_RUN << ctrl_shift,
+ SC27XX_LED_RUN << ctrl_shift);
+ if (!err)
+ ldev->brightness = pattern[1].brightness;
+
+out:
+ mutex_unlock(&leds->priv->lock);
+
+ return err;
+}
+
static int sc27xx_led_register(struct device *dev, struct sc27xx_led_priv *priv)
{
int i, err;
@@ -132,16 +248,24 @@
for (i = 0; i < SC27XX_LEDS_MAX; i++) {
struct sc27xx_led *led = &priv->leds[i];
+ struct led_init_data init_data = {};
if (!led->active)
continue;
led->line = i;
led->priv = priv;
- led->ldev.name = led->name;
led->ldev.brightness_set_blocking = sc27xx_led_set;
+ led->ldev.pattern_set = sc27xx_led_pattern_set;
+ led->ldev.pattern_clear = sc27xx_led_pattern_clear;
+ led->ldev.default_trigger = "pattern";
- err = devm_led_classdev_register(dev, &led->ldev);
+ init_data.fwnode = led->fwnode;
+ init_data.devicename = "sc27xx";
+ init_data.default_label = ":";
+
+ err = devm_led_classdev_register_ext(dev, &led->ldev,
+ &init_data);
if (err)
return err;
}
@@ -152,13 +276,12 @@
static int sc27xx_led_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node, *child;
+ struct device_node *np = dev_of_node(dev), *child;
struct sc27xx_led_priv *priv;
- const char *str;
u32 base, count, reg;
int err;
- count = of_get_child_count(np);
+ count = of_get_available_child_count(np);
if (!count || count > SC27XX_LEDS_MAX)
return -EINVAL;
@@ -182,7 +305,7 @@
return err;
}
- for_each_child_of_node(np, child) {
+ for_each_available_child_of_node(np, child) {
err = of_property_read_u32(child, "reg", ®);
if (err) {
of_node_put(child);
@@ -196,15 +319,8 @@
return -EINVAL;
}
+ priv->leds[reg].fwnode = of_fwnode_handle(child);
priv->leds[reg].active = true;
-
- err = of_property_read_string(child, "label", &str);
- if (err)
- snprintf(priv->leds[reg].name, LED_MAX_NAME_SIZE,
- "sc27xx::");
- else
- snprintf(priv->leds[reg].name, LED_MAX_NAME_SIZE,
- "sc27xx:%s", str);
}
err = sc27xx_led_register(dev, priv);
@@ -241,4 +357,5 @@
MODULE_DESCRIPTION("Spreadtrum SC27xx breathing light controller driver");
MODULE_AUTHOR("Xiaotong Lu <xiaotong.lu@spreadtrum.com>");
+MODULE_AUTHOR("Baolin Wang <baolin.wang@linaro.org>");
MODULE_LICENSE("GPL v2");
--
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