Jacek
On 9/25/19 4:27 PM, Jacek Anaszewski wrote:
Dan,
On 9/25/19 7:46 PM, Dan Murphy wrote:
<big_snip>
+
+static int lp50xx_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lp50xx_led *led = container_of(cdev, struct lp50xx_led, led_dev);
+ const struct lp50xx_chip_info *led_chip = led->priv->chip_info;
+ struct led_mc_color_entry *color_data;
+ u8 led_offset, reg_val, reg_color_offset;
+ int ret = 0;
+
+ mutex_lock(&led->priv->lock);
+
+ if (led->ctrl_bank_enabled)
+ reg_val = led_chip->bank_brt_reg;
+ else
+ reg_val = led_chip->led_brightness0_reg +
+ led->led_number;
+
+ ret = regmap_write(led->priv->regmap, reg_val, brightness);
+ if (ret) {
+ dev_err(&led->priv->client->dev,
+ "Cannot write brightness value %d\n", ret);
+ goto out;
+ }
+
+ list_for_each_entry(color_data, &led->mc_cdev.color_list, list) {
+ if (color_data->led_color_id == LED_COLOR_ID_RED)
+ reg_color_offset = 0;
+ else if (color_data->led_color_id == LED_COLOR_ID_GREEN)
+ reg_color_offset = 1;
+ else if (color_data->led_color_id == LED_COLOR_ID_BLUE)
+ reg_color_offset = 2;
+ else
+ continue;
This else case is quite erroneous. Sheer continue is just ignoring
serious problem. I'd log the problem and return -EINVAL.
Ack.
Also, you could have a macro for mapping color_id to offset.
If the code needed to do this more then once I could justify a macro.
But this is the only instance of this check.
+
+ if (led->ctrl_bank_enabled) {
+ reg_val = led_chip->bank_mix_reg + reg_color_offset;
+ } else {
+ led_offset = (led->led_number * 3) + reg_color_offset;
+ reg_val = led_chip->mix_out0_reg + led_offset;
+ }
+
+ ret = regmap_write(led->priv->regmap, reg_val,
+ color_data->intensity);
+ if (ret) {
+ dev_err(&led->priv->client->dev,
+ "Cannot write intensity value %d\n", ret);
+ goto out;
+ }
+ }
+out:
+ mutex_unlock(&led->priv->lock);
+ return ret;
+}
+
+static enum led_brightness lp50xx_brightness_get(struct led_classdev *cdev)
+{
+ struct lp50xx_led *led = container_of(cdev, struct lp50xx_led, led_dev);
+ const struct lp50xx_chip_info *led_chip = led->priv->chip_info;
+ unsigned int brt_val;
+ u8 reg_val;
+ int ret;
+
+ mutex_lock(&led->priv->lock);
+
+ if (led->ctrl_bank_enabled)
+ reg_val = led_chip->bank_brt_reg;
+ else
+ reg_val = led_chip->led_brightness0_reg + led->led_number;
+
+ ret = regmap_read(led->priv->regmap, reg_val, &brt_val);
+
+ mutex_unlock(&led->priv->lock);
+
+ return brt_val;
+}
+
+static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[])
+{
+ u8 led_config_lo, led_config_hi;
+ u32 bank_enable_mask = 0;
+ int ret;
+ int i;
+
+ for (i = 0; i < priv->chip_info->num_leds; i++)
+ bank_enable_mask |= (1 << led_banks[i]);
+
+ led_config_lo = (u8)(bank_enable_mask & 0xff);
+ led_config_hi = (u8)(bank_enable_mask >> 8) & 0xff;
+
+ ret = regmap_write(priv->regmap, LP50XX_LED_CFG0, led_config_lo);
+ if (ret)
+ return ret;
+
+ if (led_config_hi)
Now I think that less questionable would be writing led_config_hi always
for devices that have CFG1 register. IOW write led_config_hi also
when it equals 0.
Ack. I will have to modify the check to only write this for LP5030/36
as those are the only 2 that have the CFG1 register.
+ ret = regmap_write(priv->regmap, LP5036_LED_CFG1,
+ led_config_hi);
+
+ return ret;
+}
+
+static int lp50xx_reset(struct lp50xx *priv)
+{
+ if (priv->enable_gpio)
+ return gpiod_direction_output(priv->enable_gpio, 1);
+ else
+ return regmap_write(priv->regmap, priv->chip_info->reset_reg,
+ LP50XX_SW_RESET);
+}
+
+static int lp50xx_enable_disable(struct lp50xx *priv, u8 enable_disable)
+{
+ return regmap_write(priv->regmap, LP50XX_DEV_CFG0, enable_disable);
+}
+
+static int lp50xx_probe_dt(struct lp50xx *priv)
+{
+ u32 led_banks[LP5036_MAX_LED_MODULES];
+ struct fwnode_handle *child = NULL;
+ struct fwnode_handle *led_node = NULL;
+ struct led_init_data init_data;
+ struct lp50xx_led *led;
+ int num_colors;
+ u32 color_id;
+ int led_number;
+ size_t i = 0;
+ int ret;
+
+ priv->enable_gpio = devm_gpiod_get_optional(&priv->client->dev,
+ "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(priv->enable_gpio)) {
+ ret = PTR_ERR(priv->enable_gpio);
+ dev_err(&priv->client->dev, "Failed to get enable gpio: %d\n",
+ ret);
+ return ret;
+ }
+
+ priv->regulator = devm_regulator_get(&priv->client->dev, "vled");
+ if (IS_ERR(priv->regulator))
+ priv->regulator = NULL;
+
+ device_for_each_child_node(&priv->client->dev, child) {
+ led = &priv->leds[i];
+ if (fwnode_property_present(child, "ti,led-bank")) {
+ ret = fwnode_property_read_u32_array(child,
+ "ti,led-bank",
+ NULL, 0);
+ ret = fwnode_property_read_u32_array(child,
+ "ti,led-bank",
+ led_banks,
+ ret);
+
+ priv->num_of_banked_leds = ARRAY_SIZE(led_banks);
+
+ ret = lp50xx_set_banks(priv, led_banks);
+ if (ret) {
+ dev_err(&priv->client->dev,
+ "Cannot setup banked LEDs\n");
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+ led->ctrl_bank_enabled = 1;
+
+ } else {
+ ret = fwnode_property_read_u32(child, "reg",
+ &led_number);
Not checking ret val?
Yes it is after the else case. But I should probably check return for
the led-bank
+
+ led->led_number = led_number;
+ }
+ if (ret) {
+ dev_err(&priv->client->dev,
+ "led sourcing property missing\n");
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+
Dan
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