From e1889fbf66eb0f18723ace4d562cd60ad87f25c0 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Fri, 28 Dec 2018 12:12:58 +1100
Subject: [PATCH] AP_HAL: added set_slowdown() to SPIDevice

used to slow down a SPI device below normal high speed operation
---
 libraries/AP_HAL/SPIDevice.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libraries/AP_HAL/SPIDevice.h b/libraries/AP_HAL/SPIDevice.h
index 7bb94ec89e..604a18b040 100644
--- a/libraries/AP_HAL/SPIDevice.h
+++ b/libraries/AP_HAL/SPIDevice.h
@@ -61,6 +61,9 @@ public:
     /* See Device::adjust_periodic_callback() */
     virtual bool adjust_periodic_callback(
         PeriodicHandle h, uint32_t period_usec) override { return false; }
+
+    // setup a bus clock slowdown factor (optional interface)
+    virtual void set_slowdown(uint8_t slowdown) {}
 };
 
 class SPIDeviceManager {