Add support for TI TLC59208F (#718)

* Add support for TI TLC59208F

The chip is a 8-BIT FM+ I2C BUS LED DRIVER with
8 open-drain output channels.

Its features include:
- 256 linear levels
- group dimming
- group blinking
- 64 slave addresses
- customizable sub addresses and all call address
- output update on stop or on ACK
- 3.3V or 5V supply with 5V tolerant IO
- no glitch startup
- 50mA / output continuous current up to 17V

* Convert macro to uint8_t

Variables had to be renamed, clang-format would protest against
mixed case in global variable name.

* Change gen-call reset to use the correct i2c bus

esphome/components/tlc59208f/tlc59208f_output.h

@@ -0,0 +1,67 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/output/float_output.h"
+#include "esphome/components/i2c/i2c.h"
+
+namespace esphome {
+namespace tlc59208f {
+
+// 0*: Group dimming, 1: Group blinking
+extern const uint8_t TLC59208F_MODE2_DMBLNK;
+// 0*: Output change on Stop command, 1: Output change on ACK
+extern const uint8_t TLC59208F_MODE2_OCH;
+// 0*: WDT disabled, 1: WDT enabled
+extern const uint8_t TLC59208F_MODE2_WDTEN;
+// WDT timeouts
+extern const uint8_t TLC59208F_MODE2_WDT_5MS;
+extern const uint8_t TLC59208F_MODE2_WDT_15MS;
+extern const uint8_t TLC59208F_MODE2_WDT_25MS;
+extern const uint8_t TLC59208F_MODE2_WDT_35MS;
+
+class TLC59208FOutput;
+
+class TLC59208FChannel : public output::FloatOutput {
+ public:
+  TLC59208FChannel(TLC59208FOutput *parent, uint8_t channel) : parent_(parent), channel_(channel) {}
+
+ protected:
+  void write_state(float state) override;
+
+  TLC59208FOutput *parent_;
+  uint8_t channel_;
+};
+
+/// TLC59208F float output component.
+class TLC59208FOutput : public Component, public i2c::I2CDevice {
+ public:
+  TLC59208FOutput(uint8_t mode = TLC59208F_MODE2_OCH) : mode_(mode) {}
+
+  TLC59208FChannel *create_channel(uint8_t channel);
+
+  void setup() override;
+  void dump_config() override;
+  float get_setup_priority() const override { return setup_priority::HARDWARE; }
+  void loop() override;
+
+ protected:
+  friend TLC59208FChannel;
+
+  void set_channel_value_(uint8_t channel, uint8_t value) {
+    if (this->pwm_amounts_[channel] != value)
+      this->update_ = true;
+    this->pwm_amounts_[channel] = value;
+  }
+
+  uint8_t mode_;
+
+  uint8_t min_channel_{0xFF};
+  uint8_t max_channel_{0x00};
+  uint8_t pwm_amounts_[256] = {
+      0,
+  };
+  bool update_{true};
+};
+
+}  // namespace tlc59208f
+}  // namespace esphome