From bdc69c87d8e89d89021f3541577d91e0ae195236 Mon Sep 17 00:00:00 2001
From: Sebastien Vayrette <vayrette@gmail.com>
Date: Mon, 20 Apr 2026 13:41:54 -0400
Subject: [PATCH] fix: Bump GC9A01 SPI clock to 80MHz to match Waveshare
 reference

Waveshare demo code uses 80MHz SPI. Our driver was at 40MHz.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 esp32s3/balance/main/gc9a01.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/esp32s3/balance/main/gc9a01.c b/esp32s3/balance/main/gc9a01.c
index 3541649..8bbd4f9 100644
--- a/esp32s3/balance/main/gc9a01.c
+++ b/esp32s3/balance/main/gc9a01.c
@@ -172,7 +172,7 @@ void gc9a01_init(void)
     ESP_ERROR_CHECK(spi_bus_initialize(SPI2_HOST, &bus, SPI_DMA_CH_AUTO));
 
     spi_device_interface_config_t dev = {
-        .clock_speed_hz = 40 * 1000 * 1000,
+        .clock_speed_hz = 80 * 1000 * 1000,
         .mode           = 0,
         .spics_io_num   = DISP_CS_GPIO,
         .queue_size     = 1,