From 9c4bf0ac4aed4ab315f27bfa5d2f54b0dd931138 Mon Sep 17 00:00:00 2001
From: Joel Challis <git@zvecr.com>
Date: Thu, 2 Apr 2020 22:23:57 +0100
Subject: Initial support for ATtiny85 (#8632)

* Initial support for ATtiny85

* Update mcu selection
---
 quantum/config_common.h  |  3 +++
 quantum/mcu_selection.mk | 15 +++++++++++++++
 2 files changed, 18 insertions(+)

(limited to 'quantum')

diff --git a/quantum/config_common.h b/quantum/config_common.h
index 4cfd74b0fe..9861c86780 100644
--- a/quantum/config_common.h
+++ b/quantum/config_common.h
@@ -63,6 +63,9 @@
 #        define PINB_ADDRESS 0x3
 #        define PINC_ADDRESS 0x6
 #        define PIND_ADDRESS 0x9
+#    elif defined(__AVR_ATtiny85__)
+#        define ADDRESS_BASE 0x10
+#        define PINB_ADDRESS 0x6
 #    else
 #        error "Pins are not defined"
 #    endif
diff --git a/quantum/mcu_selection.mk b/quantum/mcu_selection.mk
index ef7e8ae75d..33de162bb1 100644
--- a/quantum/mcu_selection.mk
+++ b/quantum/mcu_selection.mk
@@ -287,3 +287,18 @@ ifneq (,$(filter $(MCU),atmega328p))
   NO_UART ?= yes
   NO_SUSPEND_POWER_DOWN ?= yes
 endif
+
+ifneq (,$(filter $(MCU),attiny85))
+  PROTOCOL = VUSB
+
+  # Processor frequency.
+  #     This will define a symbol, F_CPU, in all source code files equal to the
+  #     processor frequency in Hz. You can then use this symbol in your source code to
+  #     calculate timings. Do NOT tack on a 'UL' at the end, this will be done
+  #     automatically to create a 32-bit value in your source code.
+  F_CPU ?= 16500000
+
+  # unsupported features for now
+  NO_UART ?= yes
+  NO_SUSPEND_POWER_DOWN ?= yes
+endif
-- 
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