From b0ea39f7eb18aa73160b0b848a9000892f43c0e7 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Wed, 8 Mar 2023 15:53:03 -0800
Subject: [PATCH] altos/driver: Document setting for AO_ST7565_BIAS

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src/drivers/ao_st7565.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/drivers/ao_st7565.c b/src/drivers/ao_st7565.c
index e45db4d2..24b94076 100644
--- a/src/drivers/ao_st7565.c
+++ b/src/drivers/ao_st7565.c
@@ -97,6 +97,10 @@ ao_st7565_setup(void)
 		return;
 	setup_done = true;
 	ao_st7565_reset();
+	/*
+	 * Should be set to one of AO_ST7565_LCD_BIAS_1_9 or
+	 * AO_ST7565_LCD_BIAS_1_7
+	 */
 	ao_st7565_instruction(AO_ST7565_BIAS);
 	ao_st7565_instruction(AO_ST7565_ADC_SELECT_NORMAL);
 
-- 
2.30.2